Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1720420115 |
Pronounced summer warming in northwest Greenland during the Holocene and Last Interglacial | |
McFarlin, Jamie M.1; Axford, Yarrow1; Osburn, Magdalena R.1; Kelly, Meredith A.2; Osterberg, Erich C.2; Farnsworth, Lauren B.2 | |
2018-06-19 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:25页码:6357-6362 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Projections of future rates of mass loss from the Greenland Ice Sheet are highly uncertain because its sensitivity to warming is unclear. Geologic reconstructions of Quaternary interglacials can illustrate how the ice sheet responded during past warm periods, providing insights into ice sheet behavior and important tests for data-model comparisons. However, paleoclimate records from Greenland are limited: Early Holocene peak warmth has been quantified at only a few sites, and terrestrial sedimentary records of prior interglacials are exceptionally rare due to glacial erosion during the last glacial period. Here, we discuss findings from a lacustrine archive that records both the Holocene and the Last Interglacial (LIG) from Greenland, allowing for direct comparison between two interglacials. Sedimentary chironomid assemblages indicate peak July temperatures 4.0 to 7.0 degrees C warmer than modern during the Early Holocene maximum in summer insolation. Chaoborus and chironomids in LIG sediments indicate July temperatures at least 5.5 to 8.5 degrees C warmer than modern. These estimates indicate pronounced warming in northwest Greenland during both interglacials. This helps explain dramatic ice sheet thinning at Camp Century in northwest Greenland during the Early Holocene and, for the LIG, aligns with controversial estimates of Eemianwarming from ice core data retrieved in northern Greenland. Converging geologic evidence for strong LIG warming is challenging to reconcile with inferred Greenland Ice Sheet extent during the LIG, and the two appear incompatible in many models of ice sheet evolution. An increase in LIG snowfall could help resolve this problem, pointing to the need for hydroclimate reconstructions from the region. |
英文关键词 | Greenland Holocene thermal maximum Last Interglacial Eemian paleotemperature |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435585200037 |
WOS关键词 | RELATIVE SEA-LEVEL ; ICE-SHEET ; BAFFIN-ISLAND ; TEMPERATURE RECONSTRUCTIONS ; ARCTIC AMPLIFICATION ; WESTERN GREENLAND ; CLIMATE-CHANGE ; LAND BIOTAS ; RECORD ; MODEL |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/204935 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Northwestern Univ, Dept Earth & Planetary Sci, Evanston, IL 60208 USA; 2.Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA |
推荐引用方式 GB/T 7714 | McFarlin, Jamie M.,Axford, Yarrow,Osburn, Magdalena R.,et al. Pronounced summer warming in northwest Greenland during the Holocene and Last Interglacial[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(25):6357-6362. |
APA | McFarlin, Jamie M.,Axford, Yarrow,Osburn, Magdalena R.,Kelly, Meredith A.,Osterberg, Erich C.,&Farnsworth, Lauren B..(2018).Pronounced summer warming in northwest Greenland during the Holocene and Last Interglacial.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(25),6357-6362. |
MLA | McFarlin, Jamie M.,et al."Pronounced summer warming in northwest Greenland during the Holocene and Last Interglacial".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.25(2018):6357-6362. |
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