气候变化领域集成服务门户(CCPortal): Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores

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DOI	10.5194/cp-17-317-2021
	Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores
	Plach A.; Vinther B.; H. Nisancioglu K.; Vudayagiri S.; Blunier T.
发表日期	2021
ISSN	1814-9324
起始页码	299
结束页码	313
卷号	17 期号:1
英文摘要	This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130?000to 115?000years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface melt is of high relevance due to its potential effect on ice core observations, e.g. lowering the preserved total air content (TAC) used to infer past surface elevation. An investigation of surface melt is particularly interesting for warm periods with high surface melt, such as the Eemian interglacial period. Furthermore, Eemian ice is the deepest and most compressed ice preserved on Greenland, resulting in our inability to identify melt layers visually. Therefore, simulating Eemian melt rates and associated melt layers is beneficial to improve the reconstruction of past surface elevation. Estimated TAC, based on simulated melt during the Eemian, could explain the lower TAC observations. The simulations show Eemian surface melt at all deep Greenland ice core locations and an average of up to∼30melt days per year at Dye-3, corresponding to more than 600?mmwater equivalent (w.e.) of annual melt. For higher ice sheet locations, between 60 and 150?mmw.e.yr-1on average are simulated. At the summit of Greenland, this yields a refreezing ratio of more than 25?%of the annual accumulation. As a consequence, high melt rates during warm periods should be considered when interpreting Greenland TAC fluctuations as surface elevation changes. In addition to estimating the influence of melt on past TAC in ice cores, the simulated surface melt could potentially be used to identify coring locations where Greenland ice is best preserved © 2021 Georg Thieme Verlag. All rights reserved.
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183608
作者单位	Department of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria; Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Centre for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway
推荐引用方式 GB/T 7714	Plach A.,Vinther B.,H. Nisancioglu K.,et al. Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores[J],2021,17(1).
APA	Plach A.,Vinther B.,H. Nisancioglu K.,Vudayagiri S.,&Blunier T..(2021).Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores.Climate of the Past,17(1).
MLA	Plach A.,et al."Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores".Climate of the Past 17.1(2021).