气候变化领域集成服务门户(CCPortal): Arctic Sea Ice Growth in Response to Synoptic-And Large-Scale Atmospheric Forcing from CMIP5 Models

CCPortal

DOI	10.1175/JCLI-D-19-0326.1
	Arctic Sea Ice Growth in Response to Synoptic-And Large-Scale Atmospheric Forcing from CMIP5 Models
	Cai L.; Alexeev V.A.; Walsh J.E.
发表日期	2020
ISSN	0894-8755
起始页码	6083
结束页码	6099
卷号	33 期号:14
英文摘要	We explore the response of wintertime Arctic sea ice growth to strong cyclones and to large-scale circulation patterns on the daily scale using Earth system model output in phase 5 of the Coupled Model Intercomparison Project (CMIP5).Acombined metrics ranking method selects three CMIP5 models that are successful in reproducing the wintertime Arctic dipole (AD) pattern. A cyclone identification method is applied to select strong cyclones in two subregions in the North Atlantic to examine their different impacts on sea ice growth. The total change of sea ice growth rate (SGR) is split into those respectively driven by the dynamic and thermodynamic atmospheric forcing. Three models reproduce the downward longwave radiation anomalies that generally match thermodynamic SGR anomalies in response to both strong cyclones and large-scale circulation patterns. For large-scale circulation patterns, the negative AD outweighs the positive Arctic Oscillation in thermodynamically inhibiting SGR in both impact area and magnitude. Despite the disagreement on the spatial distribution, the three CMIP5 models agree on the weaker response of dynamic SGR than thermodynamic SGR. As the Arctic warms, the thinner sea ice results in more ice production and smaller spatial heterogeneity of thickness, dampening the SGR response to the dynamic forcing. The higher temperature increases the specific heat of sea ice, thus dampening the SGR response to the thermodynamic forcing. In this way, the atmospheric forcing is projected to contribute less to change daily SGR in the future climate. © 2020 American Meteorological Society. All rights reserved.
英文关键词	Climate change; Climate models; Specific heat; Storms; Arctic Oscillation; Atmospheric forcing; Coupled Model Intercomparison Project; Cyclone identifications; Large-scale circulation patterns; Long-wave radiation; Spatial heterogeneity; Temperature increase; Sea ice; atmospheric circulation; atmospheric forcing; climate modeling; CMIP; sea ice; synoptic meteorology; thermodynamics; tropical cyclone; winter; Arctic; Atlantic Ocean; Atlantic Ocean (North)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171218
作者单位	NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Cai L.,Alexeev V.A.,Walsh J.E.. Arctic Sea Ice Growth in Response to Synoptic-And Large-Scale Atmospheric Forcing from CMIP5 Models[J],2020,33(14).
APA	Cai L.,Alexeev V.A.,&Walsh J.E..(2020).Arctic Sea Ice Growth in Response to Synoptic-And Large-Scale Atmospheric Forcing from CMIP5 Models.Journal of Climate,33(14).
MLA	Cai L.,et al."Arctic Sea Ice Growth in Response to Synoptic-And Large-Scale Atmospheric Forcing from CMIP5 Models".Journal of Climate 33.14(2020).