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we study the influence of the large-scale atmospheric contribution to the dynamics of the convective boundary layer (cbl) in a situation observed during the boundary layer late afternoon and sunset turbulence (bllast) field campaign. we employ two modeling approaches, the mixed-layer theory and large-eddy simulation (l... | study of a prototypical convective boundary layer observed during bllast: contributions by large-scale forcings |
china's fengyun 3 (fy-3) polar orbiting satellites are set to become an important source of observational data for numerical weather prediction (nwp), atmospheric reanalyses, and climate monitoring studies over the next two decades. as part of the climate science for service partnership china (cssp china) program, fy-3... | assessment and assimilation of fy-3 humidity sounders and imager in the uk met office global model |
the structure of atmospheric turbulence is analyzed based on the existence of three different night-time turbulent regimes observed in the amazon forest, classified according to sun's criteria: regime 1: weak turbulence, low wind speed; regime 2: strong turbulence, with high wind speed, and regime 3: intermittent turbu... | turbulence regimes in the stable boundary layer above and within the amazon forest |
the kuroshio current (kc), which redistributes heat and moisture from the tropics toward mid-latitudes, considerably affects ocean-atmosphere-land interactions along its pathways. however, our knowledge about the kc strength and associated forcing, based on investigations of instrumental data and model simulations, is ... | persistent intensification of the kuroshio current during late holocene cool intervals |
solar flux densities and heating rates predicted by a broadband, multilayer δ-eddington two-stream approximation are compared to estimates from a monte carlo model that uses detailed descriptions of cloud particle phase functions and facilitates locally nonzero net horizontal flux densities. results are presented as do... | estimation of errors in two-stream approximations of the solar radiative transfer equation for cloudy-sky conditions |
large volcanic eruptions reaching the stratosphere have caused marked perturbations to the global climate including cooling at the earth's surface, changes in large-scale circulation and precipitation patterns and marked temporary reductions in global ocean heat content. many studies have investigated these effects usi... | quantifying canesm5 and eamv1 sensitivities to mt. pinatubo volcanic forcing for the cmip6 historical experiment |
we investigate the impact of clouds on the atmosphere of gj 1214b using the radiatively coupled, phase-equilibrium cloud model eddysed coupled to the unified model general circulation model. we find that, consistent with previous investigations, high metallicity (100 × solar) and clouds with large vertical extents (a s... | the impact of phase equilibrium cloud models on gcm simulations of gj 1214b |
the aerosol-radiation interaction mechanism (ari) is important for air quality modeling, and its absence in atmospheric chemistry models may cause considerable uncertainties. in this study, the real-time calculated aerosol optical parameters, i.e., mass extinction coefficient (kext), single scattering albedo (ω), and a... | aerosol-radiation interaction in the operational atmospheric chemistry model grapes_meso5.1/cuace and its impacts on mesoscale nwp in beijing-tianjin-hebei, china |
photothermal catalytic co2 hydrogenation to ch3oh with renewable h2 is a promising method to convert solar energy into chemical energy. however, it is still impeded by limited co2 conversion efficiency and poor ch3oh selectivity under mild conditions. herein, we report a ru/in2o3 catalyst for efficient and stable photo... | highly efficient and stable photothermal catalytic co2 hydrogenation to methanol over ru/in2o3 under atmospheric pressure |
air pollution represents the biggest environmental risk for health. it is so widespread and it represents one of the main problems of the worldwide, especially because it is emitted by so many different types of sources. the pollutants can originate directly by exhausted or they can be formed because of the reaction wi... | correlation between air pollution and weather data in urban areas: assessment of the city of rome (italy) as spatially and temporally independent regarding pollutants |
we use in situ environmental measurements by the mars science laboratory (msl) mission to obtain the surface energy budget (seb) across curiosity's traverse during the first 2500 sols of the mission. this includes values of the downwelling shortwave solar radiation, the upwelling solar radiation reflected by the surfac... | the surface energy budget at gale crater during the first 2500 sols of the mars science laboratory mission |
atmospheric tides are the primary source of daily air pressure variation at the surface of mars. these tides are forced by solar heating of the atmosphere and modulated by the presence of atmospheric dust, topography, and surface albedo and thermal inertia. this results in a complex mix of sun-synchronous and non-sun-s... | atmospheric tides in gale crater, mars |
we reported the first aircraft campaign on summer cloud microphysical properties conducted in july of 2014 over the tibetan plateau during the third tibetan plateau atmospheric sciences experiment (tipex-iii), and demonstrated that the summer clouds over the tibetan plateau were primarily characterized as mixed-phase c... | aircraft measurement campaign on summer cloud microphysical properties over the tibetan plateau |
the work is devoted to the study of the climatic effects of black carbon (bc) transferred from forest fires to the arctic zone. the hysplit (the hybrid single-particle lagrangian integrated trajectory model) trajectory model was used to initially assess the potential for particle transport from fires. the results of th... | black carbon emissions from the siberian fires 2019: modelling of the atmospheric transport and possible impact on the radiation balance in the arctic region |
the significant inclination of the plane of the satellite's equator to the plane of the orbit allows us to record differences in the flow of solar energy to different latitudinal zones during the rotation around the sun. the equator of enceladus, like saturn itself, is inclined to the plane of the planet's orbit by alm... | seasonal activity of "tiger" stripes on enceladus |
the state of the stratospheric ozone layer and the temperature structure of the atmosphere are largely controlled by the solar spectral irradiance (ssi) through its influence on heating and photolysis rates. this study focuses on the uncertainties in the photolysis rate response to solar irradiance variability related ... | evaluation of simulated photolysis rates and their response to solar irradiance variability |
plant water content observations using microwave remote sensing measurements allow monitoring of landscape-scale plant water stress. during soil drying following rainfall events, we use a granger causality framework to quantify the degree to which environmental factors drive satellite-based plant water content loss acr... | land-atmosphere drivers of landscape-scale plant water content loss |
clouds have been recognized to enhance surface melt on the greenland ice sheet (gris). however, quantitative estimates of the effects of clouds on the gris melt area and ice-sheet-wide surface mass balance are still lacking. here we assess the effects of clouds with a state-of-the-art regional climate model, conducting... | cloud-driven modulations of greenland ice sheet surface melt |
research on monoclinic (m1) phase of vo2 has attracted a great of interest for smart coating applications due to its exceptional thermochromic property. herein, we report the results using a novel approach to synthesize n-doped vo2(m1) thin films with high purity by heat treatment in nh3 atmosphere. the n dopant in the... | observation of reduced phase transition temperature in n-doped thermochromic film of monoclinic vo2 |
the present analysis investigates the spatio-temporal variability of the convective parameters and associated lightning flash rates during the period 1997-2013 including the el niño and la niña episode. it reveals that north-western and north-eastern part along the foothills of himalayas as well as indo-china peninsula... | spatio-temporal variability of lightning and convective activity over south/south-east asia with an emphasis during el niño and la niña |
the icy giants uranus and neptune have similar rotation periods, large orbital inclinations and intense zonal winds at the visible cloud level. the winds are organized into three broad jets: a zonal jet that flows to the west at low latitudes and single jets that flow to the east in each hemisphere at mid and high-lati... | atmospheric dynamics and vertical structure of uranus and neptune's weather layers |
with the major increase in the volume of the spectroscopic line lists needed to perform accurate radiative transfer calculations, disseminating accurate radiative data has become almost as much a challenge as computing it. considering that many planetary science applications are only looking for heating rates or mid-to... | spectral binning of precomputed correlated-k coefficients |
a new internally-mixed aerosol optics scheme was developed. aerosols (organic carbon, sea salt, aerosol water, sulfate, and nitrate) were assumed to be internally mixed with black carbon and soil dust (bc and sd, respectively), both of which are treated as cores. in the sd-containing particles, the particle non-spheric... | evaluation of a new internally-mixed aerosol optics scheme in the weather research and forecasting model |
on a global and annual average, we find a parameterization in which the cloud cover increase is proportional to the mid tropospheric temperature increase, with a negative proportionality factor. if the relative humidity is conserved throughout the troposphere, a 1 °c heating (cooling) of the mid troposphere, decreases ... | thermodynamics of climate change between cloud cover, atmospheric temperature and humidity |
the deposition of solar energy in the upper arctic ocean depends, among other things, on the composition of the water column. during the n-ice2015 expedition, a drift in the arctic pack ice north of svalbard, an under-ice phytoplankton bloom was encountered in may 2015. this bloom led to significant changes in the inhe... | effects of an arctic under-ice bloom on solar radiant heating of the water column |
solar signals in the atmosphere and the ocean, especially in tropopause temperatures and lower stratospheric water vapour are investigated using recent observational and reanalyses data sets for the period from 1958 through 2013. previous observational and modeling studies demonstrated solar influences in the lower str... | solar impacts on decadal variability of tropopause temperature and lower stratospheric (ls) water vapour: a mechanism through ocean-atmosphere coupling |
recent spicam ir solar occultations reveal significant abundances of water vapor up to ≈80 km near mars perihelion. these abundances are stimulated by dust that heats the atmosphere and precludes condensation of water. this phenomenon correlates with detections of high escape of hydrogen near perihelion using the h lym... | photochemistry of water in the martian thermosphere and its effect on hydrogen escape |
oxygen-oxygen collision-induced absorption (o2-o2 cia) of solar radiation heats the atmosphere, affects radiative transfer, and needs to be considered in spectroscopy applications in earth's atmosphere. the lack of o2-o2 cia spectra in the gas phase below 335 nm wavelength is limiting remote sensing applications in thi... | o2-o2 cia in the gas phase: cross-section of weak bands, and continuum absorption between 297-500 nm |
modern reusable launch vehicle technology may allow high flight rate space transportation at low cost. emissions associated with a hydrogen fueled reusable rocket system are modeled based on the launch requirements of developing a space-based solar power system that generates present-day global electric energy demand. ... | global atmospheric response to emissions from a proposed reusable space launch system |
ground-based measurements of the vertical electric field (ez or potential gradient) during fair weather days in the negev desert, southern israel are presented for the period june 2013-july 2015. we show results of the diurnal variation of ez on seasonal and annual time scales, and make comparisons with the well-known ... | local and global impacts on the fair-weather electric field in israel |
the indo-gangetic plain (igp) suffers from recurrent heavy air pollution during the dry season of each year. the aeronet station established in lumbini, a semi-urban site and historically significant location as the birthplace of buddha in the northern edge of the central igp in nepal, captured two events of heavy air ... | two heavy haze events over lumbini in southern nepal: enhanced aerosol radiative forcing and heating rates |
increasing albedo is an effective strategy to mitigate urban air temperature in different climates. using reflective urban surfaces decreases the air temperature, which potentially reduces the rate of generation of smog. however, for implementing the albedo enhancement, complicated interactions between air, moisture, a... | effect of increasing urban albedo on meteorology and air quality of montreal (canada) - episodic simulation of heat wave in 2005 |
the potential link between decreasing barents-kara sea ice and cold winters in europe is investigated using the enhanced resolution (horizontal atmospheric resolution of ∼80 km ) global, coupled climate model ec-earth. nudging sea ice only in the barents-kara seas, five configurations of sea ice covers are used to asse... | barents-kara sea ice and european winters in ec-earth |
we study fully compressible convection in the context of plane-parallel, polytropically stratified atmospheres. we perform a suite of two- (2d) and three-dimensional (3d) simulations in which we vary the initial superadiabaticity (ɛ ) and the rayleigh number (ra) while fixing the initial density stratification, aspect ... | convective heat transport in stratified atmospheres at low and high mach number |
the magnetosphere is a major source of energy for the earth's ionosphere and thermosphere (it) system. current it models drive the upper atmosphere using empirically calculated magnetospheric energy input. thus, they do not sufficiently capture the storm-time dynamics, particularly at high latitudes. to improve the pre... | modeling the ionosphere-thermosphere response to a geomagnetic storm using physics-based magnetospheric energy input: openggcm-ctim results |
thin films of cdte/cds were prepared using the thermal evaporation technique with pressure 2 × 10-5 mbar on substrate from glass. the thickness of cdcl2 layer around 150 nm was deposited making as-deposited cdte/cds films. the films covered by cadmium chloride (cdcl2) layer were annealed in atmosphere of (o2 + ar) at d... | optical and structure properties of cdte/cds films under influence of both cdcl2 heat treatment and (o2 + ar) atmosphere |
the earth-like planets and moons in our solar system have iron-rich cores, silicate mantles, and a basaltic crust. differentiated icy moons can have a core and a mantle and an outer water-ice layer. indirect evidence for several icy moons suggests that this ice is underlain by or includes a water-rich ocean. similar pr... | interiors of earth-like planets and satellites of the solar system |
based on observations from the unmanned aerial vehicle (uav) together with an environmental particulate matter analyzer (grimm-180) and global positioning system (gps) sounding balloons, the vertical structure of dust with different particle sizes was explored over the taklimakan desert (td) during an intensive observa... | dust characteristics observed by unmanned aerial vehicle over the taklimakan desert |
the southern ocean, characterized by strong westerly winds and a rough sea state, exhibits the most pronounced sea spray effects. sea spray ejected by ocean surface waves enhances heat and water exchange at the air-sea interface. however, this process has not been considered in current climate models, and the influence... | effects of sea spray on large-scale climatic features over the southern ocean |
three schemes dealing with the radiative transfer in the region where the solar and infrared spectra overlap are discussed and compared, among which two schemes are commonly used in current climate models, and the other is a newly proposed one. in single-column simulations for multi-layers atmosphere, the scheme, which... | radiative transfer in the region with solar and infrared spectra overlap |
the summer of 2022 was memorable and record-breaking, ranking as the second hottest summer in france since 1900, with a seasonal surface air temperature average of 22.7 °c. in particular, france experienced multiple record-breaking heatwaves during the meteorological summer. as the main heat reservoir of the earth syst... | response of the sea surface temperature to heatwaves during the france 2022 meteorological summer |
many materials have been tailored for sorption-based solar-thermal-driven atmospheric water harvesting (awh), but awh devices are still inefficient and unscalable. to close the large gap between materials research and practical application, a hydrogel-based composite sorbent (pclg) with high adsorption capacity per uni... | high-yield and scalable water harvesting of honeycomb hygroscopic polymer driven by natural sunlight |
this paper describes a method to correct for the effect of solar radiation in atmospheric distributed temperature sensing (dts) applications. by using two cables with different diameters, one can determine what temperature a zero diameter cable would have. such a virtual cable would not be affected by solar heating and... | fiber optic distributed temperature sensing for the determination of air temperature |
aquaplanets with low-heat-capacity slab-ocean boundary conditions can exhibit rapid changes in the regime of the overturning circulation over the seasonal cycle, which have been connected to the onset of earth's monsoons. in spring, as the itcz migrates off the equator, it jumps poleward and a sudden transition occurs ... | processes and timescales in onset and withdrawal of ``aquaplanet monsoons'' |
renewable generation from wind and solar power is strongly weather-dependent. to plan future sustainable energy systems that are robust to this variability, a better understanding of why and when periods of low wind and solar power output occur is valuable. we call such periods of low wind and solar power output `dunke... | meteorological conditions during dunkelflauten in germany: characteristics, the role of weather regimes and impacts on demand |
cesium silver bismuth halides(cs2agbibr6) perovskite solar cells(pscs) exhibit low power conversion efficiency (pce) due to their inherent defects. in this study, transition metal zinc(zn) cation is firstly incorporated into cs2agbibr6 perovskites to form cs2(ag1-xznx)bibr6, which significantly increases the efficiency... | boosting the stability and efficiency of cs2agbibr6 perovskite solar cells via zn doping |
effects of forest fires on regional weather conditions were analyzed for central and eastern siberia after warm and dry weather conditions in summer 2019 using cosmo-ru (consortium for small-scale modeling; ru—russia) and cosmo-ruart (art—aerosols and reactive trace gases) model systems. four series of numerical experi... | effect of natural forest fires on regional weather conditions in siberia |
the role of temperature feedbacks in polar amplification of climate change is examined by comparing the response of idealized high- and low-latitude atmospheric columns to greenhouse gas forcing. an analytic expression for the surface polar amplification factor is derived with a one-layer atmospheric model and compared... | conceptual model analysis of the influence of temperature feedbacks on polar amplification |
solar influences on spatial patterns of eurasian winter climate and possible mechanisms are investigated based on a multiple linear regression method and multisource observational and reanalysis data. robust and significant solar signals are detected in eurasian surface air temperature (sat), and strong solar activity ... | solar influences on spatial patterns of eurasian winter temperature and atmospheric general circulation anomalies |
aot data for eight years period (2004-2012) using the microtops ii sun photometer has been used to study the wavelength dependent optical characteristics of aerosols over jodhpur, situated in the desert region in nw india. the daily mean aot at 500 nm for the present study period was 0.66 ± 0.14 with an average angstro... | long term characterization of aerosol optical properties: implications for radiative forcing over the desert region of jodhpur, india |
spatially integrated measurements of the surface energy balance (seb) are needed in urban areas to evaluate urban climate models and satellite observations. scintillometers allow observations of sensible heat flux (qh) over much larger areas than techniques such as eddy covariance (ec), however methods are needed to pa... | spatial and temporal patterns of surface-atmosphere energy exchange in a dense urban environment using scintillometry |
the global-mean surface temperature has experienced a rapid warming from the 1980s to early-2000s but a muted warming since, referred to as the global warming hiatus in the literature. decadal changes in deep ocean heat uptake are thought to primarily account for the rapid warming and subsequent slowdown. here, we exam... | decadal evolution of the surface energy budget during the fast warming and global warming hiatus periods in the era-interim |
tropical ground ice on mars undergoes long-term sublimation and likely exospheric escape. without restriction of sublimation, the cryosphere would eventually breach, leading to massive loss of any underlying groundwater. we seek to understand the conditions under which the ground-ice seal, groundwater, and subsurface h... | on the secular retention of ground water and ice on mars |
heat waves generally hit the sichuan basin (scb) in summer, especially in july and august. this study investigates the interannual variability of mid-summer heat wave frequency (hwf) over the scb. the leading mode of the scb mid-summer hwf, which explains 48% of the total variance, exhibits an uniform spatial pattern a... | interannual variability of mid-summer heat wave frequency over the sichuan basin |
past measurements of the atmospheric vertical electric field (ez or potential gradient) at numerous land stations showed a strong response of the daily electric field to a morning local effect known as ;austausch; - the transport of electrical charges due to increased turbulence. in mountainous regions, nocturnal charg... | ground-based measurements of the vertical e-field in mountainous regions and the "austausch" effect |
we analyze the multi-earth system model responses of ocean temperatures and the atlantic meridional overturning circulation (amoc) under an idealized solar radiation management scenario (g1) from the geoengineering model intercomparison project. all models simulate warming of the northern north atlantic relative to no ... | impact of the geomip g1 sunshade geoengineering experiment on the atlantic meridional overturning circulation |
the influence of reduced solar forcing (grand solar minimum or geoengineering scenarios like solar radiation management) on the atlantic meridional overturning circulation (amoc) is assessed in an ensemble of atmosphere-ocean-chemistry-climate model simulations. ensemble sensitivity simulations are performed with and w... | response of the amoc to reduced solar radiation - the modulating role of atmospheric chemistry |
the size and mass of venus is similar to those of the earth; however, its atmospheric dynamics are considerably different and they are poorly understood due to limited observations and computational difficulties. here, we developed a data assimilation system based on the local ensemble transform kalman filter (letkf) f... | development of an ensemble kalman filter data assimilation system for the venusian atmosphere |
aerosol heating due to shortwave absorption has implications for local atmospheric stability and regional dynamics. the derivation of heating rate profiles from space-based observations is challenging because it requires the vertical profile of relevant properties such as the aerosol extinction coefficient and single-s... | biomass burning aerosol heating rates from the oracles (observations of aerosols above clouds and their interactions) 2016 and 2017 experiments |
graphitic carbon nitride (g-c3n4), as a metal-free and visible-light-responsive photocatalyst, is always a research hotspot in the field of solar energy conversion (hydrogen-production of water splitting). here, the critical review summarizes a panorama of the latest progress related to the design and syntheses of two-... | metal-free photocatalyst of graphitic carbon nitride goes into two-dimensional time |
we investigate the forcing mechanisms of the terdiurnal solar tide in the middle atmosphere using a mechanistic global circulation model. in order to quantify their individual contributions, we perform several model experiments and separate each forcing mechanism by switching off the remaining sources. we find that the... | nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation |
china faces unprecedented air pollution today. in this study, a database (so2, no2, co, o3, pm2.5 (particulate matter with aerodynamic diameter less than 2.5 μm), and pm10 (particulate matter with aerodynamic diameter less than 10 μm) was developed from recordings in 188 cities across china in 2014 and 2015 to explore ... | temporal and spatial patterns of china's main air pollutants: years 2014 and 2015 |
a coupled aerosol-atmosphere-ocean-sea ice climate model is used to explore the interaction between aerosols and the indian summer monsoon precipitation on seasonal-to-interannual time scales. results show that when increased aerosol loading is found on the himalayas slopes in the premonsoon period (april-may), intensi... | indian monsoon and the elevated-heat-pump mechanism in a coupled aerosol-climate model |
continental shallow clouds are an important component of the land-atmosphere coupled climate system because of their role in modulating energy and water budgets. the parameterization of these clouds in climate models presents a significant challenge. we evaluate the potential impact of subgrid-scale (for climate models... | the impact of surface heterogeneities and land-atmosphere interactions on shallow clouds over arm sgp site |
using a new observational technique, the ngims (neutral gas and ion mass spectrometer) instrument on the maven (mars atmosphere and volatile evolution) spacecraft has the unique capability to measure horizontal thermospheric winds. measured along the orbit track from periapsis (∼150 km) to ∼200 km, these are the first ... | maven/ngims thermospheric neutral wind observations: interpretation using the m-gitm general circulation model |
in this paper, we report the first comprehensive observations of local time asymmetries in densities and scale heights (temperatures) of the martian upper atmosphere (between 150 and 300 km) measured by the mars atmosphere and volatile evolution mission/neutral gas and ion mass spectrometer. for this purpose, we use th... | dawn-dusk asymmetries in the martian upper atmosphere |
by using the ship-based data collected over the south china sea during the south china sea summer monsoon (scssm) in 2021, the characteristics of near-surface meteorological conditions, surface heat budget, and atmospheric boundary layer structure are analyzed. we found that near-surface air temperature (relative humid... | response of sea surface heat fluxes to the south china sea summer monsoon onset in 2021 |
the insight (interior exploration using seismic investigations, geodesy and heat transport) robotic lander is scheduled to land in elysium planitia on mars in september 2016. insight will perform the first comprehensive surface-based geophysical investigation including seismic measurements. knowledge about encounter ra... | dust devil track survey at elysium planitia, mars: implications for the insight landing sites |
the stratospheric, tropospheric and surface impacts from the 11 year ultraviolet solar spectral irradiance (ssi) variability have been extensively studied using climate models and observations. here, we demonstrate using idealized model simulations that the pacific decadal oscillation (pdo), which has been shown to imp... | the 11 year solar cycle uv irradiance effect and its dependency on the pacific decadal oscillation |
a tunable selective emitter with hollow zigzag sio2 metamaterials, which are deposited on si3n4 and ag film, is proposed and numerically investigated for achieving excellent radiative cooling effects. the average emissivity reaches a high value of 98.7% in the atmospheric window and possesses a high reflectivity of 92.... | efficient realization of daytime radiative cooling with hollow zigzag sio2 metamaterials |
visible plumes above wet cooling towers are of great concern due to the associated aesthetic and environmental impacts. the parallel path wet/dry cooling tower is one of the most commonly used approaches for plume abatement, however, the associated capital cost is usually high due to the addition of the dry coils. rece... | cooling tower plume abatement and plume modeling: a review |
this study assesses the air quality in zabrze (southern poland) based on the ambient concentrations of equivalent black carbon (ebc). ebc measurement campaigns were carried out from april 2019 to march 2020 using a modern ae33 aethalometer, accompanied by parallel measurements of gaseous pollutants, pm10 and meteorolog... | temporal variability of equivalent black carbon components in atmospheric air in southern poland |
mars was characterized by cataclysmic groundwater-sourced surface flooding that formed large outflow channels and that may have altered the climate for extensive periods during the hesperian era. in particular, it has been speculated that such events could have induced significant rainfall and caused the formation of l... | 3d modelling of the climatic impact of outflow channel formation events on early mars |
different climate drivers influence precipitation in different ways. here we use radiative kernels to understand the influence of rapid adjustment processes on precipitation in climate models. rapid adjustments are generally triggered by the initial heating or cooling of the atmosphere from an external climate driver. ... | quantifying the importance of rapid adjustments for global precipitation changes |
in this paper, we present the optical and radiative properties of aerosols for the first time measured at yogi vemana university (yvu) campus (14.47°n, 78.82°e, 138 m above sea level), kadapa, a semi-arid region in southern india during december 2013-february 2015. the collocated measurements of aerosol optical depth (... | characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, kadapa in india |
spider pulsars are binary systems containing an energetic millisecond pulsar that intensely irradiates a closely orbiting low-mass companion. modelling their companion's optical light curves is essential to the study of the orbital properties of the binary, including the determination of the pulsar mass, characterizing... | a model for redistributing heat over the surface of irradiated spider companions |
we present the results of a comprehensive study of traveling ionospheric disturbances (tids) occurring over europe during the total solar eclipse of 20 march 2015. for detection of wave structures and estimation of tid parameters, two remote sensing techniques were combined: incoherent scatter (is) radars and european ... | observation and characterization of traveling ionospheric disturbances induced by solar eclipse of 20 march 2015 using incoherent scatter radars and gps networks |
this paper reports the observational results of aerosol optical, microphysical and radiative characteristics for the time measured over gorongosa (18.97ºs, 34.35ºe, 30 m asl) in mozambique using a ground-based aeronet sun-sky radiometer. in the present study, the data recorded during the period july-december, 2012 have... | variability in aerosol optical properties and radiative forcing over gorongosa (18.97os, 34.35oe) in mozambique |
we present spatial and temporal distributions of dust on mars from ls = 331° in my 26 until ls = 80° in my33 retrieved from the measurements taken by the planetary fourier spectrometer (pfs) aboard mars express. in agreement with previous observations, large dust opacity is observed mostly in the southern hemisphere sp... | characterization of dust activity on mars from my27 to my32 by pfs-mex observations |
dust layers detected in the atmosphere of mars by the light detection and ranging (lidar) instrument on the phoenix mars mission are explained using an atmospheric general circulation model. the layers were traced back to observed dust storm activity near the edge of the north polar ice cap where simulated surface wind... | a solar escalator on mars: self-lifting of dust layers by radiative heating |
the interaction between radiation and clouds represents a source of uncertainty in numerical weather prediction (nwp) due to both intrinsic problems of one-dimensional radiation schemes and poor representation of clouds. the underlying question addressed in this study is how large the nwp radiative bias is for shallow ... | quantifying the bias of radiative heating rates in numerical weather prediction models for shallow cumulus clouds |
in order to improve our understanding of microphysical properties of clouds and precipitation over the tibetan plateau (tp), six cloud and precipitation processes with different intensities during the third tibetan plateau atmospheric science experiment (tipex-iii) from 3 july to 25 july 2014 in naqu region of the tp a... | a numerical investigation on microphysical properties of clouds and precipitation over the tibetan plateau in summer 2014 |
massive protostars attain high luminosities as they are actively accreting and the radiation pressure exerted on the gas in the star's atmosphere may launch isotropic high-velocity winds. these winds will collide with the surrounding gas producing shock-heated (t ~ 107 k) tenuous gas that adiabatically expands and push... | a massive star is born: how feedback from stellar winds, radiation pressure, and collimated outflows limits accretion onto massive stars |
radiative energy flux data, downloaded from ceres, are evaluated with respect to their variations from 2001 to 2020. we found the declining outgoing shortwave radiation to be the most important contributor for a positive toa (top of the atmosphere) net flux of 0.8 w/m2 in this time frame. we compare clear sky with clou... | radiative energy flux variation from 2001–2020 |
the aerosol layers during the heat wave of july 2015 over paris area have been studied using a n2-raman lidar with co- and cross-polarized channels. the lidar observations are examined to allow the identification of main aerosol types and their origins, in synergy with measurements of the aeronet sunphotometer network ... | atmospheric aerosol variability above the paris area during the 2015 heat wave - comparison with the 2003 and 2006 heat waves |
we investigate 3-d mountain effects on solar flux distributions and their impact on surface hydrology over the western united states, specifically the rocky mountains and the sierra nevada, using the global ccsm4 (community climate system model version 4; community atmosphere model/community land model - cam4/clm4) wit... | a global model simulation for 3-d radiative transfer impact on surface hydrology over the sierra nevada and rocky mountains |
atmospheric aerosols play an important role in earth's radiative balance, directly interacting with solar radiation or influencing cloud formation and properties. in order to assess their radiative impact, it is necessary to accurately characterise their optical properties, together with their spatial and vertical dist... | vertical profile of the clear-sky aerosol direct radiative effect in an alpine valley, by the synergy of ground-based measurements and radiative transfer simulations |
this study investigates the impacts of black carbon (bc) properties (vertical concentration, shape, size, and mixing state) and atmospheric variables (cloud and aerosol loading, surface albedo, and solar zenith angle) on bc radiative effects. observations from aircraft measurements, lidar, and the aerosol robotic netwo... | atmospheric heating rate due to black carbon aerosols: uncertainties and impact factors |
a better anticipation of high-impact heat and drought on human activity is the underlying motivation of many climate studies focused on the summer season. although a large body of research has already highlighted the prominent impact of soil moisture anomalies on summer mid-latitudes climate variability and predictabil... | investigating the impact of soil moisture on european summer climate in ensemble numerical experiments |
streams are significant sources of co2 to the atmosphere. estimates of co2 evasion fluxes (fco2) from streams typically relate to the free flowing water but exclude geomorphological structures within the stream corridor. we found that gravel bars (gbs) are important sources of co2 to the atmosphere, with on average mor... | gravel bars are sites of increased co2 outgassing in stream corridors |
during recent decades, there has been dramatic arctic sea ice retreat. this has reduced the top-of-atmosphere albedo, adding more solar energy to the climate system. there is substantial uncertainty regarding how much ice retreat and associated solar heating will occur in the future. this is relevant to future climate ... | radiative heating of an ice-free arctic ocean |
baroclinic and barotropic instabilities are well known as the mechanisms responsible for the production of the dominant energy-containing eddies in the atmospheres of earth and several other planets, as well as earth's oceans. here we consider insights provided by both linear and nonlinear instability theories into the... | baroclinic and barotropic instabilities in planetary atmospheres: energetics, equilibration and adjustment |
a transparent radiative cooling (t-rc) film with low transmittance in solar spectra and selectively high emissivity in the atmospheric window (8-13 μm) is applied on roof glazing for building energy saving. to evaluate the performance of the t-rc film, two identical model boxes (1.0 m × 0.6 m × 1.2 m, l × w × h) were c... | energy saving analysis of a transparent radiative cooling film for buildings with roof glazing |
we present unique observations of a total solar eclipse from a small unmanned aircraft system (suas) platform that was operated during the 21 august 2017 north american solar eclipse. the observations were collected near ten mile, tennessee, where eclipse totality lasted 2 min 38 s. a 2-m micrometeorological tripod was... | observations and numerical simulation of the effects of the 21 august 2017 north american total solar eclipse on surface conditions and atmospheric boundary-layer evolution |
aerosol radiative properties using recently available high-quality columnar aerosol data collected at several aeronet sites in south asia, with a focus on pollution outflow from continental south asia observed over hanimaadhoo in maldives, a small island in northern indian ocean are quantified. the seasonal mean aeroso... | year-round aerosol characteristics and radiative effects in the south asian pollution outflow over a background site in the maldives |
organic aerosols are predominantly emitted from biomass burning and biofuel use. the fraction of these aerosols that strongly absorbs ultraviolet and short visible light is referred to as brown carbon (brc). the life cycle and the optical properties of brc are still highly uncertain, thus contributing to the uncertaint... | modeling radiative and climatic effects of brown carbon aerosols with the arpege-climat global climate model |
the tibetan plateau (tp) has experienced an accelerated wintertime warming in recent decades under global warming, but consensus on its causes has not yet been reached. this study quantifies the processes of the warming through analyzing surface temperature budget and surface energy balance. it is found that increased ... | quantifying the processes of accelerated wintertime tibetan plateau warming: outside forcing versus local feedbacks |
shifts in the position of the intertropical convergence zone (itcz) have great importance for weather, climate, and society. the itcz shifts have been extensively studied in current and future warmer climate; however, little is known for its migration in the past on geological time scales. using an ensemble of climate ... | continental drift shifts tropical rainfall by altering radiation and ocean heat transport |
surface urban heat islands (suhis) are essential for evaluating urban thermal environments. however, current quantitative studies of suhis ignore the thermal radiation directionality (trd), which directly affects study precision; furthermore, they fail to assess the effects of trd characteristics at different land-use ... | a quantitative study of a directional heat island in hefei, china based on multi-source data |
the seasonal ice cover in lakes of the qinghai-tibet plateau is a transient and vulnerable part of the cryosphere, whose characteristics depend on the regional climate: strong solar radiation in the context of the dry and cold environment because of the high altitude and relatively low latitude. we use the first under-... | mechanisms and effects of under-ice warming water in ngoring lake of qinghai-tibet plateau |
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