Current global climate models (GCMs) support with high confidence the view that rising greenhouse gases and other anthropogenic forcings account for nearly all observed global surface warming—slightly ...

One of the most pervasive misunderstandings of climate — even among some who publish on climate — is the belief that any long-term trend in a measured climate variable indicates a change in climate, ...

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Water is everywhere, from the snowpack in the mountains to the tap in our kitchens. But while we often think about rainfall and snow as the main drivers of our water supply, it turns out that ...

What is the range of natural variability in climate? Climate is continually varying on time scales ranging from seasons to the lifetime of Earth. Natural climate changes can take place on short time ...

Climate variability and extremes are associated with more prolonged conflict through food price spikes, food and water insecurity, loss of income and loss of livelihoods (high confidence) ...

Small islands around the world are facing serious and immediate challenges from climate change. Many people living in the Pacific islands and East Timor report their climate is changing. Climate ...

Decades of independent observations and improved methods strengthen the evidence that greenhouse gases are changing Earth’s climate.