【摘 要】
：
Annual precipitation,evaporation,and calculated accumulation from reanalysis model outputs have been investigated for the Greenland Ice Sheet (GrIS),based on th
【机 构】
：
Nansen-Zhu International Research Centre,Mohn-Sverdrup Center, Nansen Scientific Society,Institute f
【基金项目】
：
This research was also supported by the National Basic Research Program of China;the National Science Foundation of China
论文部分内容阅读
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 accunulation 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 accumulationat 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 measurcments suggests that further improvements to reanalysis models are needed.
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