Abstract:
:Volcanic eruptions contribute to climate variability, but quantifying these contributions has been limited by inconsistencies in the timing of atmospheric volcanic aerosol loading determined from ice cores and subsequent cooling from climate proxies such as tree rings. Here we resolve these inconsistencies and show that large eruptions in the tropics and high latitudes were primary drivers of interannual-to-decadal temperature variability in the Northern Hemisphere during the past 2,500 years. Our results are based on new records of atmospheric aerosol loading developed from high-resolution, multi-parameter measurements from an array of Greenland and Antarctic ice cores as well as distinctive age markers to constrain chronologies. Overall, cooling was proportional to the magnitude of volcanic forcing and persisted for up to ten years after some of the largest eruptive episodes. Our revised timescale more firmly implicates volcanic eruptions as catalysts in the major sixth-century pandemics, famines, and socioeconomic disruptions in Eurasia and Mesoamerica while allowing multi-millennium quantification of climate response to volcanic forcing.
journal_name
Naturejournal_title
Natureauthors
Sigl M,Winstrup M,McConnell JR,Welten KC,Plunkett G,Ludlow F,Büntgen U,Caffee M,Chellman N,Dahl-Jensen D,Fischer H,Kipfstuhl S,Kostick C,Maselli OJ,Mekhaldi F,Mulvaney R,Muscheler R,Pasteris DR,Pilcher JR,Salzer M,doi
10.1038/nature14565subject
Has Abstractpub_date
2015-07-30 00:00:00pages
543-9issue
7562eissn
0028-0836issn
1476-4687pii
nature14565journal_volume
523pub_type
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