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climate change

Global Climate Projections

<<Mean sea level

Extreme weather events

Tropical cyclones>>

Climate models project substantial warming in temperature extremes by the end of the 21st century. It is virtually certain that increases in the frequency and magnitude of warm days/nights and decreases in cold days/nights will occur through the 21st century at the global scale. It is very likely that the length, frequency, and intensity of warm spells or heat waves will increase over most land areas.

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Projected change in annual coldest daily minimum temperature relative to 1981-2000. Left: Projection in 2081-2100 under RCP8.5 scenario. Right: Projection of global average over land under different greenhouse gas concentration scenarios. (Source: IPCC AR5)

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Projected change in annual warmest daily maximum temperature relative to 1981-2000. Left: Projection in 2081-2100 under RCP8.5 scenario. Right: Projection of global average over land under different greenhouse gas concentration scenarios. (Source: IPCC AR5)

Over most of the mid-latitude land masses and over wet tropical regions, extreme precipitation events will very likely be more intense and more frequent in a warmer world.

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Projected percentage change in annual maximum 5-day precipitation relative to 1981-2000. Left: Projection in 2081-2100 under RCP8.5 scenario. Right: Projection of global average over land under different greenhouse gas concentration scenarios. (Source: IPCC AR5)