Assessment of various global freshwater flux products for the global ice-free oceans
Assessment of various global freshwater flux products for the global ice-free oceans
复制标题
对全球无冰海洋的各种全球淡水通量产品进行评估
DOI：
10.1016/j.rse.2013.09.026
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发表时间：
2014
影响因子：
13.5
通讯作者：
T. Watabe
中科院分区：
文献类型：
--
作者：
S. Iwasaki;M. Kubota;T. Watabe
在本研究中，我们比较了 1988 年至 2005 年期间全球海洋的海面淡水通量产品，同时考虑了平均场、全球水收支以及年际变化和趋势。该分析考虑了基于卫星的产品（使用遥感观测的日本海洋通量数据集 [J-OFURO2]、来自卫星数据的汉堡海洋大气参数 3 [HOAPS3]、遥感系统 [RSS]、全球降水气候学项目 [GPCP2] 和气候预测中心降水合并分析 [CMAP]）；再分析（日本25年再分析[JRA25]、国家环境预测中心[NCEP]/国家大气研究中心再分析[NRA1]、NCEP/能源部再分析[NRA2]、气候预报系统再分析[CFSR]）；和混合产品（客观分析的海气通量 [OAFlux]）。为未来淡水通量产品的开发商提出建议；这些建议还旨在指导用户选择最适合其应用的产品。对于全球平均场，再分析的蒸发和降水产品在热带和亚热带地区大于卫星产品。再分析获得的蒸发数据值较大是由于空气比湿度值较低以及热带和亚热带地区的批量算法之间的差异。此外，对于全球水收支以及年际变化和趋势，再分析降水产品在很大程度上取决于其蒸发产品。如果我们使用再分析降水和卫星蒸发数据，我们会得到全球海水预算的负值。这项研究证明了使用不同的蒸发和降水产品来分析全球水文循环的困难。
In this study, we compare sea surface freshwater flux products over the global ocean for the period of 1988–2005, taking into consideration the average field, global water budget, and interannual variability and trends. The analysis considers satellite-based products (Japanese Ocean Flux Datasets with Use of Remote Sensing Observations [J-OFURO2], Hamburg Ocean–atmosphere Parameters from Satellite Data 3 [HOAPS3], Remote Sensing Systems [RSS], Global Precipitation Climatology Project [GPCP2], and Climate Prediction Center Merged Analysis of Precipitation [CMAP]); reanalysis (Japanese 25-year reanalysis [JRA25], National Centers for Environmental Prediction [NCEP]/National Center for Atmospheric Research reanalysis [NRA1], NCEP/Department of Energy reanalysis [NRA2], Climate Forecast System Reanalysis [CFSR]); and a hybrid product (Objectively Analyzed Air–Sea fluxes [OAFlux]). Recommendations are made for the developers of future freshwater flux products; these recommendations also aim to guide users to select products most suitable for their applications.For the global average field, evaporation and precipitation products of reanalysis are larger than satellite products in the tropical and subtropical regions. The large evaporation data values obtained by reanalysis are attributed to the low air specific humidity values and the differences between the bulk algorithms for the tropical and subtropical regions. Moreover, for the global water budget and the inter-annual variability and trends, the reanalysis precipitation product is largely dependent on its evaporation product. If we use reanalysis precipitation and satellite evaporation data, we obtain a negative value for the global ocean water budget. This study demonstrates the difficulty of using different evaporation and precipitation products to analyze the global hydrologic cycle.
影响因子：
8
作者：
Saha, Suranjana;Moorthi, Shrinivas;Goldberg, Mitch
通讯作者：
Goldberg, Mitch