气候变化领域集成服务门户(CCPortal): Uncertainties in coupled regional Arctic climate simulations associated with the used land surface model

CCPortal

DOI	10.1002/2016JD026213
	Uncertainties in coupled regional Arctic climate simulations associated with the used land surface model
	Matthes, Heidrun; Rinke, Annette; Zhou, Xu; Dethloff, Klaus
通讯作者	Matthes, H (通讯作者)
发表日期	2017
ISSN	2169-897X
EISSN	2169-8996
起始页码	7755
结束页码	7771
卷号	122 期号:15
英文摘要	Permafrost is one of the most important components of Arctic land. Regional atmosphere-snow-permafrost interactions can be best studied with Regional Climate Models (RCMs) due to their higher horizontal resolution compared to global climate models. The development of Arctic RCMs with sophisticated land models is therefore very important. Comparing RCMs with different land surface model (LSM) components then allows the quantification of the uncertainties associated with the LSM. This study analyzes two simulations of coupled atmosphere-land RCMs over the Arctic, which differ only in their land component, while the atmospheric model component is the same. Specifically, we examine HIRHAM5-CLM4 (HIRHAM5 coupled with the sophisticated land model CLM4) and HIRHAM5 (HIRHAM5 coupled with the simpler land model of ECHAM5). We discuss the two models' abilities to represent observations on permafrost-like permafrost extent, active layer thickness (ALT), and soil temperature profiles, as well as on the representation of the Arctic atmosphere, based on simulations over 1979-2014. In comparison to HIRHAM5, HIRHAM5-CLM4 significantly reduces the simulated bias in ALT and winter soil temperatures. We find that the simulation of soil temperature and subsequently ALT is sensitive to soil thermal and hydraulic parameter representation in the models. The simulation of permafrost extent is sensitive to the initial soil temperature state in the models. Both HIRHAM5 and HIRHAM5-CLM4 do similarly well in modeling the Arctic 2m air temperature and atmospheric circulation. Changing the land model impacts the 2m air temperature significantly over land and the atmospheric circulation predominantly over the Arctic Ocean, associated with changes in baroclinic cyclones.
关键词	PERMAFROST REGION CARBON DYNAMICS SOIL SYSTEM SNOW TEMPERATURE VARIABILITY SENSITIVITY PROJECTIONS FEEDBACKS
英文关键词	Arctic Regional Climate Modelling; Permafrost; Uncertainties
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000408349500004
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258929
推荐引用方式 GB/T 7714	Matthes, Heidrun,Rinke, Annette,Zhou, Xu,et al. Uncertainties in coupled regional Arctic climate simulations associated with the used land surface model[J]. 中国科学院青藏高原研究所,2017,122(15).
APA	Matthes, Heidrun,Rinke, Annette,Zhou, Xu,&Dethloff, Klaus.(2017).Uncertainties in coupled regional Arctic climate simulations associated with the used land surface model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(15).
MLA	Matthes, Heidrun,et al."Uncertainties in coupled regional Arctic climate simulations associated with the used land surface model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.15(2017).