NSFGEO-NERC: Paleoclimate Signatures of the Climate Response to West Antarctic Ice Sheet Collapse

NSFGEO-NERC：西南极冰盖崩塌气候响应的古气候特征

基本信息

批准号：
1602435
负责人：
Eric Steig
金额：
$ 37.18万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-07-01 至 2023-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1602435&HistoricalAwards=false
关键词：
NSFGEO NERC Paleoclimate Signatures Climate

项目摘要

Steig/1602435This award supports a project to examine the response of the climate system to changes in the Antarctic ice sheet. The Antarctic ice sheet rises into the atmosphere more than 2 kilometers above sea level, affecting atmospheric circulation in the same way a large mountain range does. Changes in ice sheet size in the past would have caused changes in atmospheric circulation, and hence climate, that should be detectable in paleoclimate data from ice and sediment cores. The project will examine the evidence for past ice sheet changes using a comparison of such data with results from numerical climate model experiments. The intellectual merit of this project is that knowing how the Antarctic ice sheet may have changed during previous warm periods is fundamental to understanding the response of ice sheets to climate change. There is evidence that West Antarctic ice sheet (WAIS) may already be in the beginning stages of collapse. The broader impact is that the outcomes of this research will inform projections of how much, and how fast, the WAIS may change in the future. The project is a joint effort between the University of Washington (Seattle, USA) and the British Antarctic Survey (Cambridge, U.K.), and is the result of independent and complementary efforts by groups from both institutions. The project will support two postdocs, and will help to encourage further international cooperative and multi-disciplinary research in this area.This project, submitted under the NSF/GEO-UK NERC lead agency opportunity (NSF 14-118) and the Paleo Perspectives on Climate Change (P2C2) solicitation, will use a combination of existing paleoclimate data and new model simulations to examine the influence of a changing Antarctic ice sheet on climate. Model-data comparisons will be used to test the hypothesis that a collapse of the WAIS occurred during the last interglacial period, and to evaluate whether the timing and rate of WAIS collapse can be constrained through the acquisition of new ice core records from Antarctica. Multiple, high-resolution, fully-coupled atmosphere-ocean general circulation models (GCMs) will be used to create an ensemble of simulations that include varying scenarios for Antarctic ice sheet change. The project will use the Community Earth System Model version 1 (CESM1), the Hadley Centre Couple Model version 3 (HadCM3), and the Max Planck institute model, ECHAM5. Using multiple models improves understanding of the key processes and provides a critical measure of the influence of model biases on the model-data comparison.

Steig/1602435该奖项支持一个研究气候系统对南极冰盖变化的响应的项目。南极冰盖上升到海拔超过 2 公里的大气层，与大山脉一样影响大气环流。过去冰盖尺寸的变化会导致大气环流的变化，从而导致气候的变化，这应该可以在冰和沉积物核心的古气候数据中检测到。该项目将通过将这些数据与数值气候模型实验的结果进行比较来检查过去冰盖变化的证据。该项目的智力价值在于，了解南极冰盖在以前的温暖时期可能发生的变化对于了解冰盖对气候变化的响应至关重要。有证据表明，南极西部冰盖（WAIS）可能已经处于崩塌的开始阶段。更广泛的影响是，这项研究的结果将有助于预测 WAIS 未来可能发生的变化程度和速度。该项目是华盛顿大学（美国西雅图）和英国南极调查局（英国剑桥）的共同努力，是两个机构各小组独立和互补努力的结果。该项目将支持两名博士后，并将有助于鼓励该领域进一步的国际合作和多学科研究。该项目根据 NSF/GEO-UK NERC 牵头机构机会（NSF 14-118）和 Paleo Perspectives 提交气候变化（P2C2）征集将结合现有的古气候数据和新模型模拟来研究南极冰盖变化对气候的影响。模型数据比较将用于检验 WAIS 崩塌发生在末次间冰期期间的假设，并评估是否可以通过从南极洲获取新的冰芯记录来限制 WAIS 崩塌的时间和速率。多个高分辨率、完全耦合的大气-海洋环流模型（GCM）将用于创建模拟集合，其中包括南极冰盖变化的不同场景。该项目将使用社区地球系统模型版本 1 (CESM1)、哈德利中心耦合模型版本 3 (HadCM3) 和马克斯普朗克研究所模型 ECHAM5。使用多个模型可以提高对关键过程的理解，并提供模型偏差对模型数据比较影响的关键衡量标准。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Response of Water Isotopes in Precipitation to a Collapse of the West Antarctic Ice Sheet in High-Resolution Simulations with the Weather Research and Forecasting Model

天气研究和预报模型高分辨率模拟中降水中的水同位素对南极西部冰盖崩塌的响应

DOI：
10.1175/jcli-d-22-0647.1
发表时间：
2023-08
期刊：
Journal of Climate
影响因子：
4.9
作者：
Dütsch, Marina;Steig, Eric J.;Blossey, Peter N.;Pauling, Andrew G.
通讯作者：
Pauling, Andrew G.

Sea-ice-free Arctic during the Last Interglacial supports fast future loss

末次间冰期期间北极无海冰支持未来的快速损失

DOI：
10.1038/s41558-020-0865-2
发表时间：
2020-10
期刊：
Nature Climate Change
影响因子：
30.7
作者：
Guarino, Maria;Sime, Louise C.;Schröeder, David;Malmierca;Rosenblum, Erica;Ringer, Mark;Ridley, Jeff;Feltham, Danny;Bitz, Cecilia;Steig, Eric J.;et al
通讯作者：
et al

Nonequilibrium Fractionation During Ice Cloud Formation in iCAM5: Evaluating the Common Parameterization of Supersaturation as a Linear Function of Temperature

iCAM5 中冰云形成过程中的非平衡分馏：评估作为温度线性函数的过饱和度的常见参数化