气候变化领域集成服务门户(CCPortal): El Niño-Southern Oscillation and internal sea surface temperature variability in the tropical Indian Ocean since 1675

CCPortal

DOI	10.5194/cp-17-151-2021
	El Niño-Southern Oscillation and internal sea surface temperature variability in the tropical Indian Ocean since 1675
	Leupold M.; Pfeiffer M.; Watanabe T.K.; Reuning L.; Garbe-Schönberg D.; Shen C.-C.; Brummer G.-J.A.
发表日期	2021
ISSN	1814-9324
起始页码	199
结束页码	209
卷号	17 期号:1
英文摘要	The dominant modes of climate variability on interannual timescales in the tropical Indian Ocean are the El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole. El Niño events have occurred more frequently during recent decades, and it has been suggested that an asymmetric ENSO teleconnection (warming during El Niño events is stronger than cooling during La Niña events) caused the pronounced warming of the western Indian Ocean. In this study, we test this hypothesis using coral Sr=Ca records from the central Indian Ocean (Chagos Archipelago) to reconstruct past sea surface temperatures (SSTs) in time windows from the mid-Little Ice Age (1675 1716) to the present. Three sub-fossil massive Porites corals were dated to the 17 18th century (one coral) and the 19 20th century (two corals). Their records were compared with a published modern coral Sr=Ca record from the same site. All corals were subsampled at a monthly resolution for Sr=Ca measurements, which were measured using a simultaneous inductively coupled plasma optical emission spectrometer (ICP-OES). Wavelet coherence analysis shows that interannual variability in the four coral records is driven by ENSO, suggesting that the ENSO SST teleconnection in the central Indian Ocean has been stationary since the 17th century. To determine the symmetry of El Niño and La Niña events, we compiled composite records of positive and negative ENSO-driven SST anomaly events. We find similar magnitudes of warm and cold anomalies, indicating a symmetric ENSO response in the tropical Indian Ocean. This suggests that ENSO is not the main driver of central Indian Ocean warming. © 2021 Author(s).
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183615
作者单位	Energy and Mineral Resources Group (EMR), Geological Institute, RWTH Aachen University, Aachen, 52062, Germany; Institute of Geosciences, Kiel University, Kiel, 24118, Germany; Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan; High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan; Research Center for Future Earth, National Taiwan University, Taipei, LC6L73, Taiwan; Global Change Research Center, National Taiwan University, Taipei, 10617, Taiwan; Department of Ocean Systems, Royal Netherlands Institute for Sea Research (NIOZ), Utrecht University, Den Burg, 1790, Netherlands
推荐引用方式 GB/T 7714	Leupold M.,Pfeiffer M.,Watanabe T.K.,et al. El Niño-Southern Oscillation and internal sea surface temperature variability in the tropical Indian Ocean since 1675[J],2021,17(1).
APA	Leupold M..,Pfeiffer M..,Watanabe T.K..,Reuning L..,Garbe-Schönberg D..,...&Brummer G.-J.A..(2021).El Niño-Southern Oscillation and internal sea surface temperature variability in the tropical Indian Ocean since 1675.Climate of the Past,17(1).
MLA	Leupold M.,et al."El Niño-Southern Oscillation and internal sea surface temperature variability in the tropical Indian Ocean since 1675".Climate of the Past 17.1(2021).