Accumulation over the Greenland Ice Sheet as Represented in Reanalysis Data

Annual precipitation,evaporation,and calculated accumulation from reanalysis model outputs have been investigated for the Greenland Ice Sheet （GrIS）,based on the common period of 1989-2001.The ERA-40 and ERA-interim reanalysis data showed better agreement with observations than do NCEP-1 and NCEP-2...

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Bibliographic Details
Published in:Advances in atmospheric sciences 2011-09, Vol.28 (5), p.1030-1038
Main Author: 陈琳玲 Ola M. JOHANNESSEN 王会军 Atsumu OHMURA
Format: Article
Language:English
Subjects:
Accumulation
Atmospheric Sciences
Earth and Environmental Science
Earth Sciences
ERA
Evaporation
Geophysics/Geodesy
Glaciers
In situ measurement
Meteorology
NCEP
Ocean-atmosphere interaction
Precipitation
Spatial distribution
再分析资料
平均降水量
年降水量
格陵兰冰原
测量计算
积累
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Summary:Annual precipitation,evaporation,and calculated accumulation from reanalysis model outputs have been investigated for the Greenland Ice Sheet （GrIS）,based on the common period of 1989-2001.The ERA-40 and ERA-interim reanalysis data showed better agreement with observations than do NCEP-1 and NCEP-2 reanalyses.Further,ERA-interim showed the closest spatial distribution of accumulation to the observation.Concerning temporal variations,ERA-interim showed the best correlation with precipitation observations at five synoptic stations,and the best correlation with in situ measurements of accumulation at nine ice core sites.The mean annual precipitation averaged over the whole GrIS from ERA-interim （363 mm yr 1） and mean annual accumulation （319 mm yr 1） are very close to the observations.The validation of accumulation calculated from reanalysis data against ice-core measurements suggests that further improvements to reanalysis models are needed.
ISSN:0256-1530
1861-9533
DOI:10.1007/s00376-010-0150-9