| --- |
| title: C3DS |
| emoji: 🌍 |
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| colorTo: green |
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| # Centre for Climate Communication & Data Science (C3DS) |
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| Research group developing AI tools for understanding climate communication at scale. |
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| ## CARDS: Climate Contrarianism Claim Detection |
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| We build and release models that detect and classify **100+ types of climate contrarianism claims** in text, based on the peer-reviewed CARDS taxonomy: |
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| > Coan et al. (2026). *Large language model reveals an increase in climate contrarian speech in the United States Congress.* Communications Sustainability. [doi:10.1038/s44458-025-00029-z](https://www.nature.com/articles/s44458-025-00029-z) |
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| ## Models |
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| ### Full weights (for vLLM / Transformers) |
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| | Model | Parameters | Link | |
| |-------|-----------|------| |
| | CARDS-Qwen3.5-4B | 4B | [C3DS/CARDS-Qwen3.5-4B](https://huggingface.co/C3DS/CARDS-Qwen3.5-4B) | |
| | CARDS-Qwen3.5-9B | 9B | [C3DS/CARDS-Qwen3.5-9B](https://huggingface.co/C3DS/CARDS-Qwen3.5-9B) | |
| | CARDS-Qwen3.5-27B | 27B | [C3DS/CARDS-Qwen3.5-27B](https://huggingface.co/C3DS/CARDS-Qwen3.5-27B) | |
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| ### GGUF (for Ollama / llama.cpp / LM Studio) |
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| | Model | Q4_K_M | Q8_0 | Link | |
| |-------|--------|------|------| |
| | CARDS-Qwen3.5-4B | 2.7 GB | 4.2 GB | [C3DS/CARDS-Qwen3.5-4B-GGUF](https://huggingface.co/C3DS/CARDS-Qwen3.5-4B-GGUF) | |
| | CARDS-Qwen3.5-9B | 5.6 GB | 9.8 GB | [C3DS/CARDS-Qwen3.5-9B-GGUF](https://huggingface.co/C3DS/CARDS-Qwen3.5-9B-GGUF) | |
| | CARDS-Qwen3.5-27B | 16 GB | 28.6 GB | [C3DS/CARDS-Qwen3.5-27B-GGUF](https://huggingface.co/C3DS/CARDS-Qwen3.5-27B-GGUF) | |
| |
| ### Ollama (one-line install) |
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| ```bash |
| ollama run exec3ds/cards-qwen3.5 # 4B default |
| ollama run exec3ds/cards-qwen3.5:9b |
| ollama run exec3ds/cards-qwen3.5:27b |
| ``` |
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| ## Quick start |
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| Just give it text — the system prompt and chain-of-thought reasoning are built in: |
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| ```bash |
| ollama run exec3ds/cards-qwen3.5 "CO2 is just a trace gas. The sun drives climate." |
| ``` |
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| ## Links |
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| - [Paper (Nature Communications Sustainability)](https://www.nature.com/articles/s44458-025-00029-z) |
| - [Ollama models](https://ollama.com/exec3ds/cards-qwen3.5) |
| - [GitHub](https://github.com/project-c3ds/cards-2pO-paper) |
| |
