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Unprecedented climate events: Historical changes, aspirational targets, and national commitments

Noah S. Diffenbaugh; Deepti Singh; Justin S. Mankin

Title:
Unprecedented climate events: Historical changes, aspirational targets, and national commitments
Author(s):
Diffenbaugh, Noah S.
Singh, Deepti
Mankin, Justin S.
Date:
Type:
Articles
Department(s):
Lamont-Doherty Earth Observatory
Volume:
4
Persistent URL:
Book/Journal Title:
Science Advances
Abstract:
The United Nations Paris Agreement creates a specific need to compare consequences of cumulative emissions for pledged national commitments and aspirational targets of 1.5° to 2°C global warming. We find that humans have already increased the probability of historically unprecedented hot, warm, wet, and dry extremes, including over 50 to 90% of North America, Europe, and East Asia. Emissions consistent with national commitments are likely to cause substantial and widespread additional increases, including more than fivefold for warmest night over ~50% of Europe and >25% of East Asia and more than threefold for wettest days over >35% of North America, Europe, and East Asia. In contrast, meeting aspirational targets to keep global warming below 2°C reduces the area experiencing more than threefold increases to <10% of most regions studied. However, large areas—including >90% of North America, Europe, East Asia, and much of the tropics—still exhibit sizable increases in the probability of record-setting hot, wet, and/or dry events.
Subject(s):
Climatology
Environmental sciences
Natural disasters
Climatic changes--International cooperation
Publisher DOI:
https://doi.org/10.1126/sciadv.aao3354
Item views
21
Metadata:
text | xml
Suggested Citation:
Noah S. Diffenbaugh, Deepti Singh, Justin S. Mankin, , Unprecedented climate events: Historical changes, aspirational targets, and national commitments, Columbia University Academic Commons, .

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