大气科学2017，Vol.41Issue(1)：147-166,20.DOI:10.3878/j.issn.1006-9895.1603.15300
东亚中高纬土壤温度资料评估与分析
Evaluation and Analysis of Soil Temperature Data over Middle and High Latitudes of East Asia
摘要
Abstract
This study investigates the qualities of four soil temperature reanalysis products over middle and high latitudes of East Asia based on a set of Russian historical soil temperature data (RHSTD).The four reanalysis products are the ERA-Interim re-analysis,ERA-Interim/Land (i.e.ERA-Land),and MERRA-Land generated by running land surface models offiine,and a 20th century reanalysis (i.e.the NOAA-CIRES 20CR).More emphases are put on the spring and summer,and main results are as follows.Large seasonal fluctuations of 0-2 m soil temperature around 0℃ are found in the RHSTD,but the soil temperature below 2 m stays relatively stable.Furthermore,the soil below 2 m is permanently frozen to the north of 60°N.The four reanalysis products well capture these characters.Regardless of the spring,summer or annual mean,the soil temperature climatology shown in the four reanalysis products is always "warm in the south and cold in the north",while the spatial pattern of the ERA-Land is the closest to observations.In terms of seasonal cycle,the ERA-Land at this region has a better performance in reflecting the soil freezing and thawing processes and the seasonal evolution of soil temperature.Situations are more complex regarding the interannual variability of soil temperature,i.e.standard deviation,because errors between these re-analysis products and observations vary with season and soil layer greatly.As for the interannual change,the correlation between each reanalysis product and observations is better in the summer than in the spring,and the correlation in the upper layer is better than that in the deep layer.Meanwhile,the ERA-Land is the most representative of the four re-analysis products.It better reproduces the interannual changes in observed soil temperature than the other three products.关键词
东亚中高纬/土壤温度/资料评估/垂直廓线/气候态/季节循环/年际变化Key words
Middle and high latitudes of East Asia/Soil temperature/Data evaluation/Vertical profile/Climatology/Seasonal cycle/Interannual variation分类
天文与地球科学引用本文复制引用
于忠达,周广庆,周筠珺..东亚中高纬土壤温度资料评估与分析[J].大气科学,2017,41(1):147-166,20.基金项目
国家重点研发计划项目高性能计算项目2016YFB0200800 （）
National Major Research High Performance Computing Program of China (Grant 2016YFB0200800) （Grant 2016YFB0200800）
