Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1911902116 |
A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene | |
Irvali, Nil1,2; Galaasen, Eirik V.1,2; Ninnemann, Ulysses S.1,2; Rosenthal, Yair3,4; Born, Andreas1,2; Kleiven, Helga (Kikki) F.1,2 | |
2020-01-07 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
![]() |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:1页码:190-195 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway; USA |
英文摘要 | The Greenland Ice Sheet (GIS) has been losing mass at an accelerating rate over the recent decades. Models suggest a possible temperature threshold between 0.8 and 3.2 degrees C, beyond which GIS decline becomes irreversible. The duration of warmth above a given threshold is also a critical determinant for GIS survival, underlining the role of ocean warming, as its inertia prolongs warmth and triggers longer-term feedbacks. The exact point at which these feedbacks are triggered remains equivocal. Late Pleistocene interglacials provide potential case examples for constraining the past response of the GIS to a range of climate states, including conditions warmer than present. However, little is known about the magnitude and duration of warming near Greenland during these periods. Using high-resolution multiproxy surface ocean climate records off southern Greenland, we show that the previous 4 interglacials over the last similar to 450 ka all reached warmer than present climate conditions and exceeded the modeled temperature threshold for GIS collapse but by different magnitudes and durations. Complete deglaciation of the southern GIS in Marine Isotope Stage 11c (MIS 11c; 394.7 to 424.2 ka) occurred under climates only slightly warmer than present (similar to 0.5 +/- 1.6 degrees C), placing the temperature threshold for major GIS retreat in the lower end of model estimates and within projections for this century. |
英文关键词 | Greenland Ice Sheet Late Pleistocene interglacials climate change thresholds |
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:000506001200034 |
WOS关键词 | NEOGLOBOQUADRINA-PACHYDERMA ; PLANKTONIC-FORAMINIFERA ; MODEL ; MG/CA ; ATLANTIC ; COILING ; RATIOS ; WATER |
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/249668 |
专题 | 地球科学 |
作者单位 | 1.Univ Bergen, Dept Earth Sci, N-5007 Bergen, Norway; 2.Bjerknes Ctr Climate Res, N-5007 Bergen, Norway; 3.Rutgers State Univ, Dept Marine & Coastal Sci, New Brunswick, NJ 08901 USA; 4.Rutgers State Univ, Dept Earth & Planetary Sci, New Brunswick, NJ 08901 USA |
推荐引用方式 GB/T 7714 | Irvali, Nil,Galaasen, Eirik V.,Ninnemann, Ulysses S.,et al. A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(1):190-195. |
APA | Irvali, Nil,Galaasen, Eirik V.,Ninnemann, Ulysses S.,Rosenthal, Yair,Born, Andreas,&Kleiven, Helga .(2020).A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(1),190-195. |
MLA | Irvali, Nil,et al."A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.1(2020):190-195. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论