Global atmospheric teleconnections during Dansgaard-Oeschger events

Bradley R. Markle, Eric J. Steig, Christo Buizert, Spruce W. Schoenemann, Cecilia M. Bitz, T. J. Fudge, Joel B. Pedro, Qinghua Ding, Tyler R. Jones, James W.C. White, Todd Sowers

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

During the last glacial period, the North Atlantic region experienced a series of Dansgaard-Oeschger cycles in which climate abruptly alternated between warm and cold periods. Corresponding variations in Antarctic surface temperature were out of phase with their Northern Hemisphere counterparts. The temperature relationship between the hemispheres is commonly attributed to an interhemispheric redistribution of heat by the ocean overturning circulation. Changes in ocean heat transport should be accompanied by changes in atmospheric circulation to satisfy global energy budget constraints. Although changes in tropical atmospheric circulation linked to abrupt events in the Northern Hemisphere are well documented, evidence for predicted changes in the Southern Hemisphere's atmospheric circulation during Dansgaard-Oeschger cycles is lacking. Here we use a high-resolution deuterium-excess record from West Antarctica to show that the latitude of the mean moisture source for Antarctic precipitation changed in phase with abrupt shifts in Northern Hemisphere climate, and significantly before Antarctic temperature change. This provides direct evidence that Southern Hemisphere mid-latitude storm tracks shifted within decades of abrupt changes in the North Atlantic, in parallel with meridional migrations of the intertropical convergence zone. We conclude that both oceanic and atmospheric processes, operating on different timescales, link the hemispheres during abrupt climate change.

Original languageEnglish (US)
Pages (from-to)36-40
Number of pages5
JournalNature Geoscience
Volume10
Issue number1
DOIs
StatePublished - Jan 1 2017

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teleconnection
Dansgaard-Oeschger cycle
atmospheric circulation
Northern Hemisphere
Southern Hemisphere
storm track
intertropical convergence zone
climate
deuterium
Last Glacial
energy budget
surface temperature
temperature
moisture
timescale
climate change
ocean

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

Cite this

Markle, B. R., Steig, E. J., Buizert, C., Schoenemann, S. W., Bitz, C. M., Fudge, T. J., ... Sowers, T. (2017). Global atmospheric teleconnections during Dansgaard-Oeschger events. Nature Geoscience, 10(1), 36-40. https://doi.org/10.1038/ngeo2848
Markle, Bradley R. ; Steig, Eric J. ; Buizert, Christo ; Schoenemann, Spruce W. ; Bitz, Cecilia M. ; Fudge, T. J. ; Pedro, Joel B. ; Ding, Qinghua ; Jones, Tyler R. ; White, James W.C. ; Sowers, Todd. / Global atmospheric teleconnections during Dansgaard-Oeschger events. In: Nature Geoscience. 2017 ; Vol. 10, No. 1. pp. 36-40.
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Markle, BR, Steig, EJ, Buizert, C, Schoenemann, SW, Bitz, CM, Fudge, TJ, Pedro, JB, Ding, Q, Jones, TR, White, JWC & Sowers, T 2017, 'Global atmospheric teleconnections during Dansgaard-Oeschger events', Nature Geoscience, vol. 10, no. 1, pp. 36-40. https://doi.org/10.1038/ngeo2848

Global atmospheric teleconnections during Dansgaard-Oeschger events. / Markle, Bradley R.; Steig, Eric J.; Buizert, Christo; Schoenemann, Spruce W.; Bitz, Cecilia M.; Fudge, T. J.; Pedro, Joel B.; Ding, Qinghua; Jones, Tyler R.; White, James W.C.; Sowers, Todd.

In: Nature Geoscience, Vol. 10, No. 1, 01.01.2017, p. 36-40.

Research output: Contribution to journalArticle

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Markle BR, Steig EJ, Buizert C, Schoenemann SW, Bitz CM, Fudge TJ et al. Global atmospheric teleconnections during Dansgaard-Oeschger events. Nature Geoscience. 2017 Jan 1;10(1):36-40. https://doi.org/10.1038/ngeo2848