DOI: 10.1002/2017JC013481
Scopus记录号: 2-s2.0-85044845177
论文题名: Impact of Assimilation of Sea-Ice Surface Temperatures on a Coupled Ocean and Sea-Ice Model
作者: Rasmussen T.A.S. ; Høyer J.L. ; Ghent D. ; Bulgin C.E. ; Dybkjær G. ; Ribergaard M.H. ; Nielsen-Englyst P. ; Madsen K.S.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2440
结束页码: 2460
语种: 英语
英文关键词: assimilation
; coupled model
; ice surface temperatures
; ocean
; operational
; sea ice
Scopus关键词: air temperature
; climate forcing
; data assimilation
; estimation method
; experimental study
; heat flux
; ice cover
; ice thickness
; ice-ocean interaction
; methodology
; remote sensing
; sea ice
; snowmelt
; surface temperature
; Arctic
英文摘要: We establish a methodology for assimilating satellite observations of ice surface temperature (IST) into a coupled ocean and sea-ice model. The method corrects the 2 m air temperature based on the difference between the modeled and the observed IST. Thus the correction includes biases in the surface forcing and the ability of the model to convert incoming parameters at the surface to a net heat flux. A multisensor, daily, gap-free surface temperature analysis has been constructed over the Arctic region. This study revealed challenges estimating the ground truth based on buoys measuring IST, as the quality of the measurement varied from buoy to buoy. With these precautions we find a cold temperature bias in the remotely sensed data, and a warm bias in the modeled data relative to ice mounted buoy temperatures, prior to assimilation. As a consequence, this study weighted the modeled IST and the observed IST equally in the correction. The impact of IST was determined for experiments with and without the assimilation of IST and sea-ice concentration. We find that assimilation of remotely sensed data results in a cooling of IST, which improves the timing of the snow melt onset. The improved snow cover in spring is only based on observations from one buoy, thus additional good quality observations could strengthen the conclusions. The ice cover and the sea-ice thickness are increased, primarily in the experiment without sea-ice concentration assimilation. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114222
Appears in Collections: 气候减缓与适应
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作者单位: Danish Meteorological Institute, Copenhagen East, Denmark; University of Leicester, Leicester, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Rasmussen T.A.S.,Høyer J.L.,Ghent D.,et al. Impact of Assimilation of Sea-Ice Surface Temperatures on a Coupled Ocean and Sea-Ice Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)