Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change
El Nino/Southern Oscillation (ENSO) events and latitudinal shifts of the Intertropical Convergence Zone (ITCZ) cause large scale hydrologic changes in the western tropical Pacific (WTP). However, there is still a debate on the role of ENSO and ITCZ shifts on the hydroclimate in the WTP and their lin...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , , , , |
Format: | Report |
Language: | English |
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ELSEVIER SCIENCE BV
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Online Access: | http://ir.qdio.ac.cn/handle/337002/158080 https://doi.org/10.1016/j.palaeo.2017.12.039 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/158080 2023-05-15T18:01:12+02:00 Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change Jia, Qi Li, Tiegang Xiong, Zhifang Steinke, Stephan Jiang, Fuqing Chang, Fengming Qin, Bingbin 2018-03-15 http://ir.qdio.ac.cn/handle/337002/158080 https://doi.org/10.1016/j.palaeo.2017.12.039 英语 eng ELSEVIER SCIENCE BV PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/158080 doi:10.1016/j.palaeo.2017.12.039 Western Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary LAST GLACIAL MAXIMUM SEA-SURFACE TEMPERATURE INTERTROPICAL CONVERGENCE ZONE EASTERN EQUATORIAL PACIFIC COUPLED MODEL SIMULATIONS NINO-SOUTHERN-OSCILLATION EL-NINO WARM POOL PLANKTONIC-FORAMINIFERA INTERGLACIAL CYCLE 期刊论文 2018 ftchinacasciocas https://doi.org/10.1016/j.palaeo.2017.12.039 2022-06-27T05:39:38Z El Nino/Southern Oscillation (ENSO) events and latitudinal shifts of the Intertropical Convergence Zone (ITCZ) cause large scale hydrologic changes in the western tropical Pacific (WTP). However, there is still a debate on the role of ENSO and ITCZ shifts on the hydroclimate in the WTP and their linkage to Northern Hemisphere climate change on glacial-interglacial timescales. For that reason, we present ice volume-corrected seawater delta O-18 (delta O-18(sw-ice), a proxy for salinity) and sea surface temperature (SST) records from IMAGES Core MD06-3047B recovered from the northern WTP to investigate the hydroclimate in the WTP during the last 700 kyr. Planktic foraminifera Globigerinoides ruber based Mg/Ca-SST and delta O-18(sw-ice) the records reveal distinct glacial-interglacial variations. The delta O-18(sw-ice) record shows that our study site is characterized by fresher conditions and thus higher precipitation during glacials than during interglacials. Our results are in good agreement with numerical model simulations, which also suggest a glacial freshening in the northern WTP. A glacial freshening of the WTP is most likely related to a substantial weakening of the Atlantic Meridional Overturning Circulation (AMOC) and/or exposure of the Maritime Continent due to sea level changes which resulted in an enhanced Pacific Walker circulation and/or southward shift of the ITCZ. In addition, SST records from the WTP and the eastern tropical Pacific (ETP) suggest an enhanced tropical Pacific zonal SST gradient and thus La Nina-like conditions, which may have contributed to fresher conditions in the WTP during glacial periods. Besides, our rainfall record is in antiphase to the Chinese speleothem delta O-18 records, supporting the idea of an opposing trend in precipitation changes between the WTP and East Asia on orbital timescales. Report Planktonic foraminifera Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Pacific Palaeogeography, Palaeoclimatology, Palaeoecology 493 44 54 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Western Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary LAST GLACIAL MAXIMUM SEA-SURFACE TEMPERATURE INTERTROPICAL CONVERGENCE ZONE EASTERN EQUATORIAL PACIFIC COUPLED MODEL SIMULATIONS NINO-SOUTHERN-OSCILLATION EL-NINO WARM POOL PLANKTONIC-FORAMINIFERA INTERGLACIAL CYCLE |
spellingShingle |
Western Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary LAST GLACIAL MAXIMUM SEA-SURFACE TEMPERATURE INTERTROPICAL CONVERGENCE ZONE EASTERN EQUATORIAL PACIFIC COUPLED MODEL SIMULATIONS NINO-SOUTHERN-OSCILLATION EL-NINO WARM POOL PLANKTONIC-FORAMINIFERA INTERGLACIAL CYCLE Jia, Qi Li, Tiegang Xiong, Zhifang Steinke, Stephan Jiang, Fuqing Chang, Fengming Qin, Bingbin Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
topic_facet |
Western Philippine Sea Seawater delta O-18 estimates Sea surface temperature ENSO ITCZ AMOC Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary LAST GLACIAL MAXIMUM SEA-SURFACE TEMPERATURE INTERTROPICAL CONVERGENCE ZONE EASTERN EQUATORIAL PACIFIC COUPLED MODEL SIMULATIONS NINO-SOUTHERN-OSCILLATION EL-NINO WARM POOL PLANKTONIC-FORAMINIFERA INTERGLACIAL CYCLE |
description |
El Nino/Southern Oscillation (ENSO) events and latitudinal shifts of the Intertropical Convergence Zone (ITCZ) cause large scale hydrologic changes in the western tropical Pacific (WTP). However, there is still a debate on the role of ENSO and ITCZ shifts on the hydroclimate in the WTP and their linkage to Northern Hemisphere climate change on glacial-interglacial timescales. For that reason, we present ice volume-corrected seawater delta O-18 (delta O-18(sw-ice), a proxy for salinity) and sea surface temperature (SST) records from IMAGES Core MD06-3047B recovered from the northern WTP to investigate the hydroclimate in the WTP during the last 700 kyr. Planktic foraminifera Globigerinoides ruber based Mg/Ca-SST and delta O-18(sw-ice) the records reveal distinct glacial-interglacial variations. The delta O-18(sw-ice) record shows that our study site is characterized by fresher conditions and thus higher precipitation during glacials than during interglacials. Our results are in good agreement with numerical model simulations, which also suggest a glacial freshening in the northern WTP. A glacial freshening of the WTP is most likely related to a substantial weakening of the Atlantic Meridional Overturning Circulation (AMOC) and/or exposure of the Maritime Continent due to sea level changes which resulted in an enhanced Pacific Walker circulation and/or southward shift of the ITCZ. In addition, SST records from the WTP and the eastern tropical Pacific (ETP) suggest an enhanced tropical Pacific zonal SST gradient and thus La Nina-like conditions, which may have contributed to fresher conditions in the WTP during glacial periods. Besides, our rainfall record is in antiphase to the Chinese speleothem delta O-18 records, supporting the idea of an opposing trend in precipitation changes between the WTP and East Asia on orbital timescales. |
format |
Report |
author |
Jia, Qi Li, Tiegang Xiong, Zhifang Steinke, Stephan Jiang, Fuqing Chang, Fengming Qin, Bingbin |
author_facet |
Jia, Qi Li, Tiegang Xiong, Zhifang Steinke, Stephan Jiang, Fuqing Chang, Fengming Qin, Bingbin |
author_sort |
Jia, Qi |
title |
Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
title_short |
Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
title_full |
Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
title_fullStr |
Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
title_full_unstemmed |
Hydrological variability in the western tropical Pacific over the past 700 kyr and its linkage to Northern Hemisphere climatic change |
title_sort |
hydrological variability in the western tropical pacific over the past 700 kyr and its linkage to northern hemisphere climatic change |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2018 |
url |
http://ir.qdio.ac.cn/handle/337002/158080 https://doi.org/10.1016/j.palaeo.2017.12.039 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/158080 doi:10.1016/j.palaeo.2017.12.039 |
op_doi |
https://doi.org/10.1016/j.palaeo.2017.12.039 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
493 |
container_start_page |
44 |
op_container_end_page |
54 |
_version_ |
1766170578308300800 |