Centre for Climate Communication & Data Science (C3DS)

Research group developing AI tools for understanding climate communication at scale.

CARDS: Climate Contrarianism Claim Detection

We build and release models that detect and classify 100+ types of climate contrarianism claims in text, based on the peer-reviewed CARDS taxonomy:

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

Models

Full weights (for vLLM / Transformers)

Model Parameters Link
CARDS-Qwen3.5-4B 4B C3DS/CARDS-Qwen3.5-4B
CARDS-Qwen3.5-9B 9B C3DS/CARDS-Qwen3.5-9B
CARDS-Qwen3.5-27B 27B C3DS/CARDS-Qwen3.5-27B

GGUF (for Ollama / llama.cpp / LM Studio)

Model Q4_K_M Q8_0 Link
CARDS-Qwen3.5-4B 2.7 GB 4.2 GB C3DS/CARDS-Qwen3.5-4B-GGUF
CARDS-Qwen3.5-9B 5.6 GB 9.8 GB C3DS/CARDS-Qwen3.5-9B-GGUF
CARDS-Qwen3.5-27B 16 GB 28.6 GB C3DS/CARDS-Qwen3.5-27B-GGUF

Ollama (one-line install) 

ollama run exec3ds/cards-qwen3.5        # 4B default
ollama run exec3ds/cards-qwen3.5:9b
ollama run exec3ds/cards-qwen3.5:27b

Quick start

Just give it text — the system prompt and chain-of-thought reasoning are built in:

ollama run exec3ds/cards-qwen3.5 "CO2 is just a trace gas. The sun drives climate."

Links