State of the Climate in 2012
Author(s)
Blunden, Jessica; Arndt, Derek; Heimbach, Patrick
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For the first time in several years, the El Niño-Southern Oscillation did not dominate regional climate conditions around the globe. A weak La Niña dissipated to ENSO-neutral conditions by spring, and while El Niño appeared to be emerging during summer, this phase never fully developed as sea surface temperatures in the eastern
equatorial Pacific uncharacteristically returned to neutral conditions. Nevertheless, other large-scale climate patterns and extreme weather events impacted various regions during the year. A negative phase of the Arctic Oscillation from mid-January to early February contributed to frigid conditions in parts of northern Africa, eastern Europe, and western Asia. A lack of rain during the 2012 wet season led to the worst drought in at least the past three decades for northeastern Brazil. Central North America also experienced one of its most severe droughts on record. The Caribbean observed a very wet dry season and it was the Sahel’s wettest rainy season in 50 years.
Date issued
2013-08Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary SciencesJournal
Bulletin of the American Meteorological Society
Publisher
American Meteorological Society
Citation
Blunden, Jessica, and Derek S. Arndt. “State of the Climate in 2012.” Bull. Amer. Meteor. Soc. 94, no. 8 (August 2013): S1–S258. © 2013 American Meteorological Society
Version: Final published version
ISSN
0003-0007
1520-0477