Evaluation of two‐dimensional atmospheric water circulation fields in reanalyses by using precipitation isotopes databases
Evaluation of two‐dimensional atmospheric water circulation fields in reanalyses by using precipitation isotopes databases
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DOI：
10.1029/2004jd004764
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发表时间：
2004-10
影响因子：
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通讯作者：
K. Yoshimura;T. Oki;K. Ichiyanagi
中科院分区：
文献类型：
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作者：
K. Yoshimura;T. Oki;K. Ichiyanagi
[1] 全球瑞利型H218O环流模型由两个再分析产品强制建立，即国家环境预测中心/国家大气研究中心再分析和欧洲中期天气预报中心（ECMWF）15年再分析（ERA15）数据集，并使用全球降水同位素网络数据库对1979-1993年的月度到年际进行验证秤。在欧洲，ERA15 在两个时间尺度上都更好地匹配了观测结果，这主要是由于 ERA15 的降水场更好，而在热带地区，两者都产生了类似准确的同位素场。同位素分析诊断数据集中二维水循环场的准确性，特别关注降水过程，但中高纬度地区的方式与低纬度地区略有不同：对以前地区的分析更为严格。
[1] A global Rayleigh-type H218O circulation model was forced by two reanalysis products, the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis and the European Centre for Medium-Range Weather Forecasts (ECMWF) 15-year reanalysis (ERA15) data sets, and the Global Network of Isotopes in Precipitation database was used to validate for 1979–1993 on monthly to interannual scales. Over Europe, ERA15 better matched observations at both timescales, owing mainly to better precipitation fields in ERA15, while in the tropics both produced similarly accurate isotopic fields. The isotope analyses diagnose accuracy of two-dimensional water circulation fields in data sets with a particular focus on precipitation processes but in a slightly different manner over middle and high latitudes than over low latitudes: Analyses were more severe over the former regions.