| Title | North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 |
| Authors | Du, Xiaojing Russell, James M. Liu, Zhengyu Otto-Bliesner, Bette L. Oppo, Delia W. Mohtadi, Mahyar Zhu, Chenyu V. Galy, Valier Schefuss, Enno Yan, Yan Rosenthal, Yair Dubois, Nathalie Arbuszewski, Jennifer Gao, Yu |
| Affiliation | Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA Ohio State Univ, Dept Geog, Atmospher Sci Program, Columbus, OH USA Natl Ctr Atmospher Res, Climate & Global Dynam Lab, Boulder, CO USA Woods Hole Oceanog Inst, Geol & Geophys Dept, Woods Hole, MA USA Univ Bremen, Ctr Marine Environm Sci, MARUM, Bremen, Germany Ocean Univ China, Frontier Sci Ctr Deep Ocean Multispheres & Earth S, Phys Oceanog Lab, Qingdao, Peoples R China Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA USA Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Isotope Geochem, Guangzhou, Peoples R China State Univ New Jersey, Dept Marine & Coastal Sci, Dept Earth & Planetary Sci, New Brunswick, NJ USA Eawag, Dept Surface Waters Res & Management, Dubendorf, Switzerland Swiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing, Peoples R China |
| Keywords | PACIFIC WARM POOL HEMISPHERE CONTROLS LAST DEGLACIATION CENTRAL INDONESIA HIGH-RESOLUTION SEA-LEVEL CLIMATE MONSOON RECORD VARIABILITY |
| Issue Date | 6-Jan-2023 |
| Publisher | SCIENCE ADVANCES |
| Abstract | Abrupt changes in the Atlantic meridional overturning circulation (AMOC) are thought to affect tropical hydro -climate through adjustment of the latitudinal position of the intertropical convergence zone (ITCZ). Heinrich Stadial 1 (HS1) involves the largest AMOC reduction in recent geological time; however, over the tropical Indian Ocean (IO), proxy records suggest zonal anomalies featuring intense, widespread drought in tropical East Africa versus generally wet but heterogeneous conditions in the Maritime Continent. Here, we synthesize proxy data and an isotope-enabled transient deglacial simulation and show that the southward ITCZ shift over the eastern IO during HS1 strengthens IO Walker circulation, triggering an east-west precipitation dipole across the basin. This dipole reverses the zonal precipitation anomalies caused by the exposed Sunda and Sahul shelves due to glacial lower sea level. Our study illustrates how zonal modes of atmosphere-ocean circulation can amplify or reverse global climate anomalies, highlighting their importance for future climate change. |
| URI | http://hdl.handle.net/20.500.11897/672790 |
| ISSN | 2375-2548 |
| DOI | 10.1126/sciadv.add4909 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
