Impact of river run-off on global ocean mass redistribution
Impact of river run-off on global ocean mass redistribution
复制标题
河流径流对全球海洋质量重新分配的影响
DOI：
10.1111/j.1365-246x.2006.03247.x
复制
发表时间：
2007
影响因子：
2.8
通讯作者：
Maik Thomas
中科院分区：
文献类型：
--
作者：
H. Dobslaw;Maik Thomas
摘要河流径流对全球海洋质量再分布的影响是通过斜压环流模式OMCT模拟分析的，该模式由欧洲中期天气预报中心的实时大气强迫场驱动。河流径流数据已推导出水文流量模型（HDM）与ECMWF数据以及强迫。虽然次月质量变化一般是微不足道的GRACE去混叠的目的，在大多数海洋区域，每月平均质量信号高达2百帕发生在北冰洋在融化季节。此外，从淡水通量由于降水，蒸发和河流径流的海洋总质量的季节变化计算。对应于观测到的质量变化推导出每月GRACE重力解决方案表明，ECMWF，HDM和OMCT的组合允许一个一致的预测模拟大气，海洋和大陆水圈之间的质量交换。因此，GRACE质量异常的解释应考虑区域和全球河流径流的影响。
SUMMARY The impact of river run-off on global ocean mass redistribution is analysed by means of simulations with the baroclinic general circulation model OMCT driven by real-time atmospheric forcing fields from the European Centre for Medium Range Weather Forecasts (ECMWF). River run-off data have been deduced from a Hydrological Discharge Model (HDM) forced with ECMWF data as well. While submonthly mass variability is generally insignificant for GRACE de-aliasing purposes in most oceanic regions, monthly mean mass signals of up to 2 hPa occur in the Arctic Ocean during the melt season. Additionally, from freshwater fluxes due to precipitation, evaporation and river run-off the seasonal variations of total ocean mass are calculated. Correspondence with observed mass variations deduced from monthly GRACE gravity solutions indicates that a combination of ECMWF, HDM and OMCT allows a consistent prognostic simulation of mass exchanges among the atmosphere, ocean and continental hydrosphere. Thus, interpretations of GRACE based mass anomalies should account for both regional and global river run-off effects.