globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.07.040
Scopus记录号: 2-s2.0-85052309649
论文题名:
Rapid precipitation changes in the tropical West Pacific linked to North Atlantic climate forcing during the last deglaciation
作者: Xiong Z.; Li T.; Chang F.; Algeo T.J.; Clift P.D.; Bretschneider L.; Lu Z.; Zhu X.; Frank M.; Sauer P.E.; Jiang F.; Wan S.; Zhang X.; Chen S.; Huang J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 197
起始页码: 288
结束页码: 306
语种: 英语
英文关键词: AMOC ; Chemical weathering ; ENSO ; ITCZ ; Terrigenous input ; Western Philippine sea
Scopus关键词: Atmospheric pressure ; Geochemistry ; Rain ; Sea level ; Sediments ; Tropics ; Weathering ; AMOC ; Chemical weathering ; ENSO ; ITCZ ; Philippine seas ; Terrigenous inputs ; Climate change ; chemical weathering ; climate forcing ; climate variation ; continental shelf ; continental slope ; El Nino-Southern Oscillation ; Heinrich event ; Holocene ; hydrological response ; intertropical convergence zone ; last deglaciation ; precipitation (climatology) ; proxy climate record ; rainfall ; terrigenous deposit ; Younger Dryas ; Atlantic Ocean ; Atlantic Ocean (North) ; Luzon ; Mindanao ; Pacific Ocean ; Pacific Ocean (West) ; Philippine Sea ; Philippines
英文摘要: The cause of rapid hydrological changes in the tropical West Pacific during the last deglaciation remains controversial. In order to test whether these changes were triggered by abrupt climate change events in the North Atlantic Ocean, variations in precipitation during the last deglaciation (18–10 ka) were extracted from proxy records of chemical weathering and terrigenous input in the western Philippine Sea (WPS). The evolution of chemical weathering and terrigenous input since 27 ka was reconstructed using the chemical index of alteration (CIA), elemental ratios (K/Al, TOC/TN and Ti/Ca), δ13Corg, terrigenous fraction abundance and flux data from International Marine Global Change Study Program (IMAGES) core MD06-3054 collected on the upper continental slope of eastern Luzon (northern Philippines). Sediment deposited during the Last Glacial Maximum (LGM) shows weathering equal to or slightly greater than Holocene sediment in the WPS. This unusual state of chemical weathering, which is inconsistent with lower air temperatures and decreased precipitation in Luzon during the LGM, may be due to reworking of poorly consolidated sediments on the eastern Luzon continental shelf during the LGM sea-level lowstand. Rapid changes in chemical weathering, characterized by higher intensity during the Heinrich event 1 (H1) and Younger Dryas (YD) and lower intensity during the Bølling-Allerød (B/A), were linked to rapid variations in precipitation in the WPS during the last deglaciation. The higher terrigenous inputs during the LGM relative to those of the Holocene were controlled by sea-level changes rather than precipitation. The terrigenous inputs show a long-term decline during the last deglaciation, punctuated by brief spikes during the H1 and YD related to sea-level rises and rapid precipitation changes in the WPS, respectively. The proxy records of chemical weathering and terrigenous input from eastern Luzon suggest high rainfall during the H1 and YD events, consistent with inferred rainfall patterns based on Fe/Ca records from offshore Mindanao. Rapid precipitation changes in the WPS did not coincide with migrations of the Intertropical Convergence Zone (ITCZ) but, rather, were related to state shifts of the El Niño-Southern Oscillation (ENSO) during the last deglaciation. Based on proxy records and modeling results, we argue that the Atlantic meridional overturning circulation (AMOC) controlled rapid precipitation changes in the tropical West Pacific through zonal shifts of ENSO or meridional migration of the ITCZ during the last deglaciation. Our findings highlight the dominant role of the North Atlantic Ocean in the tropical hydrologic cycle during the last deglaciation. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112059
Appears in Collections:气候减缓与适应

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作者单位: Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, United States; State Key Laboratories of Biogeology and Environmental Geology, and Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; Department of Geology and Geophysics and the Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803, United States; School of Geography Science, Nanjing Normal University, Nanjing, 210023, China; GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1-3, Kiel, 24148, Germany; Laboratory of Climate, Ocean and Atmosphere Studies, School of Physics, Peking University, Beijing, 100871, China; Department of Geological Sciences, Indiana University, Bloomington, IN 47405-1405, United States; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bussestrasse 24, Bremerhaven, D-27570, Germany; Wuhan Center, China Geological Survey, Wuhan, 430205, China

Recommended Citation:
Xiong Z.,Li T.,Chang F.,et al. Rapid precipitation changes in the tropical West Pacific linked to North Atlantic climate forcing during the last deglaciation[J]. Quaternary Science Reviews,2018-01-01,197
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