Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans

doi:10.1126/science.aba7096

GSTDTAP > 气候变化

DOI	10.1126/science.aba7096
	Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans
	Maureen H. Walczak; Alan C. Mix; Ellen A. Cowan; Stewart Fallon; L. Keith Fifield; Jay R. Alder; Jianghui Du; Brian Haley; Tim Hobern; June Padman; Summer K. Praetorius; Andreas Schmittner; Joseph S. Stoner; Sarah D. Zellers
	2020-11-06
发表期刊	Science
出版年	2020
英文摘要	Walczak et al. report that increases in Pacific Ocean ventilation and periods of rapid production of icebergs from the Cordilleran Ice Sheet during the last glacial period preceded episodic iceberg discharges into the Atlantic Ocean (see the Perspective by Jaeger and Shevenell). Marine sediments from the Gulf of Alaska show that increases in vertical mixing of the ocean there correspond with intense iceberg calving from the ice sheet that covered much of high-latitude western North America and that these changes occurred before the analogous Heinrich events in the North Atlantic. Thus, these Pacific climate system reorganizations may have been an early part of a cascade of dynamic climate events with global repercussions. Science , this issue p. [716][1]; see also p. [662][2] New radiocarbon and sedimentological results from the Gulf of Alaska document recurrent millennial-scale episodes of reorganized Pacific Ocean ventilation synchronous with rapid Cordilleran Ice Sheet discharge, indicating close coupling of ice-ocean dynamics spanning the past 42,000 years. Ventilation of the intermediate-depth North Pacific tracks strength of the Asian monsoon, supporting a role for moisture and heat transport from low latitudes in North Pacific paleoclimate. Changes in carbon-14 age of intermediate waters are in phase with peaks in Cordilleran ice-rafted debris delivery, and both consistently precede ice discharge events from the Laurentide Ice Sheet, known as Heinrich events. This timing precludes an Atlantic trigger for Cordilleran Ice Sheet retreat and instead implicates the Pacific as an early part of a cascade of dynamic climate events with global impact. [1]: /lookup/doi/10.1126/science.aba7096 [2]: /lookup/doi/10.1126/science.abe8461
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/302003
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Maureen H. Walczak,Alan C. Mix,Ellen A. Cowan,et al. Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans[J]. Science,2020.
APA	Maureen H. Walczak.,Alan C. Mix.,Ellen A. Cowan.,Stewart Fallon.,L. Keith Fifield.,...&Sarah D. Zellers.(2020).Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans.Science.
MLA	Maureen H. Walczak,et al."Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans".Science (2020).