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Signals
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Learn how long-term climate trends are linked to new extremes.
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Drought
Climate change is making droughts more likely to occur - and more severe when they do.
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Earth Systems
Global warming is causing widespread and rapid changes in the atmosphere, ocean, cryosphere and biosphere.
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Fires
Climate change is increasing the size, frequency, and intensity of wildfires.
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What is Climate Signals?
Climate Signals curates attribution science and provides resources in real time explaining how climate change worsens extreme weather and other impacts.
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Floods
Climate change is increasing the risk of flooding due to a variety of reasons including rising sea levels and increasing extreme precipitation events.
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Heat
Climate change makes heat waves hotter, longer, and more common.
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Hurricanes
Rising air and ocean temperatures due to climate change are increasing hurricane precipitation, intensity, and the risk of coastal flooding.
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Resource Hub
Events
A database of events and their links to climate change.
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Headlines
Climate change impact stories in the news.
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Real Time Data
A searchable gallery of climate change monitors relaying real-time data.
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Science Sources
A searchable database of climate science reports.
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Attribution
What is climate attribution?
Climate change attribution tells us how much of the credit or risk for a trend or event should go to human-caused climate change.
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Report: Fingerprints Everywhere 2018
Studies since the 1990s show human-caused climate change directly influenced many recent trends and events.
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Attribution science database
An updating database of studies that find the fingerprint of human-caused climate change on observed trends and events.
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Climate Change Impacts Explained in Real Time

US Phenology Observations

USA National Phenology Network

Instructional videos:

USA-NPN's Visualization Tool: Phenology maps Part 1 - Accumulated Growing Degree Days

USA-NPN's Visualization Tool: Phenology maps Part 2 - Spring Indices

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