气候变化领域集成服务门户(CCPortal): Validation of the sea ice surface albedo scheme of the regional climate model HIRHAM-NAOSIM using aircraft measurements during the ACLOUD/PASCAL campaigns

CCPortal

DOI	10.5194/tc-13-1695-2019
	Validation of the sea ice surface albedo scheme of the regional climate model HIRHAM-NAOSIM using aircraft measurements during the ACLOUD/PASCAL campaigns
	Jakel E.; Stapf J.; Wendisch M.; Nicolaus M.; Dorn W.; Rinke A.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1695
结束页码	1708
卷号	13 期号:6
英文摘要	For large-scale and long-term Arctic climate simulations appropriate parameterization of the surface albedo is required. Therefore, the sea ice surface (SIS) albedo parameterization of the coupled regional climate model HIRHAM-NAOSIM was examined against broadband surface albedo measurements performed during the joint ACLOUD (Arctic CLoud Observations Using airborne measurements during polar Day) and PASCAL (Physical feedbacks of Arctic boundary layer, Sea ice, Cloud and AerosoL) campaigns, which were performed in May-June 2017 north of Svalbard. The SIS albedo parameterization was tested using measured quantities of the prognostic variables surface temperature and snow depth to calculate the surface albedo and the individual fractions of the ice surface subtypes (snow-covered ice, bare ice, and melt ponds) derived from digital camera images taken on board the Polar 5 and 6 aircraft. The selected low-altitude (less than 100 m) flight sections of overall 12 flights were performed over surfaces dominated by snow-covered ice. It was found that the range of parameterized SIS albedo for individual days is smaller than that of the measurements. This was attributed to the biased functional dependence of the SIS albedo parameterization on temperature. Furthermore, a time-variable bias was observed with higher values compared to the modeled SIS albedo (0.88 compared to 0.84 for 29 May 2017) in the beginning of the campaign, and an opposite trend towards the end of the campaign (0.67 versus 0.83 for 25 June 2017). Furthermore, the surface type fraction parameterization was tested against the camera image product, which revealed an agreement within 1 %. An adjustment of the variables, defining the parameterized SIS albedo, and additionally accounting for the cloud cover could reduce the root-mean-squared error from 0.14 to 0.04 for cloud free/broken cloud situations and from 0.06 to 0.05 for overcast conditions. © Author(s) 2019.
学科领域	airborne survey; albedo; climate modeling; cloud cover; model validation; regional climate; sea ice; surface temperature; temperature effect; Arctic Ocean
语种	英语
scopus关键词	airborne survey; albedo; climate modeling; cloud cover; model validation; regional climate; sea ice; surface temperature; temperature effect; Arctic Ocean
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118872
作者单位	Leipzig Institute for Meteorology (LIM), University of Leipzig, Leipzig, Germany; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
推荐引用方式 GB/T 7714	Jakel E.,Stapf J.,Wendisch M.,et al. Validation of the sea ice surface albedo scheme of the regional climate model HIRHAM-NAOSIM using aircraft measurements during the ACLOUD/PASCAL campaigns[J],2019,13(6).
APA	Jakel E.,Stapf J.,Wendisch M.,Nicolaus M.,Dorn W.,&Rinke A..(2019).Validation of the sea ice surface albedo scheme of the regional climate model HIRHAM-NAOSIM using aircraft measurements during the ACLOUD/PASCAL campaigns.The Cryosphere,13(6).
MLA	Jakel E.,et al."Validation of the sea ice surface albedo scheme of the regional climate model HIRHAM-NAOSIM using aircraft measurements during the ACLOUD/PASCAL campaigns".The Cryosphere 13.6(2019).