气候变化领域集成服务门户(CCPortal): Evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2)

CCPortal

DOI	10.5194/tc-14-3645-2020
	Evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2)
	Van Dalum C.T.; Jan Van De Berg W.; Lhermitte S.; Van Den Broeke M.R.
发表日期	2020
ISSN	19940416
起始页码	3645
结束页码	3662
卷号	14 期号:11
英文摘要	Snow and ice albedo schemes in present-day climate models often lack a sophisticated radiation penetration scheme and do not explicitly include spectral albedo variations. In this study, we evaluate a new snow albedo scheme in the Regional Atmospheric Climate Model (RACMO2) for the Greenland ice sheet, version 2.3p3, that includes these processes. The new albedo scheme uses the TwostreAm Radiative TransfEr in Snow (TARTES) model and the Spectral-To-NarrOWBand ALbedo (SNOWBAL) module, version 1.2. Additionally, the bare-ice albedo parameterization has been updated. The snow and ice broadband and narrowband albedo output of the updated version of RACMO2 is evaluated using the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) and Kangerlussuaq transect (K-Transect) in situ data and Moderate Resolution Imaging Spectroradiometer (MODIS) remote-sensing observations. Generally, the modeled narrowband and broadband albedo is in very good agreement with satellite observations, leading to a negligible domain-Averaged broadband albedo bias for the interior. Some discrepancies are, however, observed close to the ice margin. Compared to the previous model version, RACMO2.3p2, the broadband albedo is considerably higher in the bare-ice zone during the ablation season, as atmospheric conditions now alter the bare-ice broadband albedo. For most other regions, however, the updated broadband albedo is lower due to spectral effects, radiation penetration or enhanced snow metamorphism. © 2020 BMJ Publishing Group. All rights reserved.
英文关键词	ablation; albedo; climate modeling; MODIS; parameterization; radiative transfer; regional climate; remote sensing; satellite data; Arctic; Greenland; Greenland Ice Sheet; Kangerlussuaq Fjord
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202231
作者单位	Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, Netherlands
推荐引用方式 GB/T 7714	Van Dalum C.T.,Jan Van De Berg W.,Lhermitte S.,et al. Evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2)[J],2020,14(11).
APA	Van Dalum C.T.,Jan Van De Berg W.,Lhermitte S.,&Van Den Broeke M.R..(2020).Evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2).Cryosphere,14(11).
MLA	Van Dalum C.T.,et al."Evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2)".Cryosphere 14.11(2020).