DOI: 10.1002/2016GL068513
论文题名: A major increase in winter snowfall during the middle Holocene on western Greenland caused by reduced sea ice in Baffin Bay and the Labrador Sea
作者: Thomas E.K. ; Briner J.P. ; Ryan-Henry J.J. ; Huang Y.
刊名: Geophysical Research Letters
ISSN: 0094-9675
EISSN: 1944-9406
出版年: 2016
卷: 43, 期: 10 起始页码: 5302
结束页码: 5308
语种: 英语
英文关键词: aquatic leaf wax
; Greenland
; Holocene
; leaf wax hydrogen isotope
; precipitation seasonality
; sea ice
Scopus关键词: Biomarkers
; Isotopes
; Sea ice
; Snow
; Aquatic biomarkers
; Greenland
; Holocenes
; Hydrogen isotope
; Seasonality
; Summer temperature
; Temperature increase
; West greenland currents
; Ice
; air temperature
; aquatic plant
; biomarker
; Holocene
; hydrogen isotope
; ice retreat
; isotopic analysis
; lacustrine deposit
; leaf
; paleoclimate
; paleotemperature
; polar region
; precipitation (climatology)
; sea ice
; snow
; wax
; winter
; Arctic
; Arctic
; Arctic Ocean
; Atlantic Ocean
; Baffin Bay [Arctic Ocean]
; Greenland
; Labrador Sea
; West Greenland
英文摘要: Precipitation is predicted to increase in the Arctic as temperature increases and sea ice retreats. Yet the mechanisms controlling precipitation in the Arctic are poorly understood and quantified only by the short, sparse instrumental record. We use hydrogen isotope ratios (δ2H) of lipid biomarkers in lake sediments from western Greenland to reconstruct precipitation seasonality and summer temperature during the past 8 kyr. Aquatic biomarker δ2H was 100‰ more negative from 6 to 4 ka than during the early and late Holocene, which we interpret to reflect increased winter snowfall. The middle Holocene also had high summer air temperature, decreased early winter sea ice in Baffin Bay and the Labrador Sea, and a strong, warm West Greenland Current. These results corroborate model predictions of winter snowfall increases caused by sea ice retreat and furthermore suggest that warm currents advecting more heat into the polar seas may enhance Arctic evaporation and snowfall. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971254718&doi=10.1002%2f2016GL068513&partnerID=40&md5=f8f53a3993ab28fc5ae91708ba7a4507
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10638
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geosciences, University of Massachusetts Amherst, Amherst, MA, United States
Recommended Citation:
Thomas E.K.,Briner J.P.,Ryan-Henry J.J.,et al. A major increase in winter snowfall during the middle Holocene on western Greenland caused by reduced sea ice in Baffin Bay and the Labrador Sea[J]. Geophysical Research Letters,2016-01-01,43(10).