Impact of river run-off on global ocean mass redistribution

被引：13

作者：

Dobslaw, Henryk ^{[1
]}

Thomas, Maik ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Planetary Geodesy, D-01062 Dresden, Germany

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 2007年 / 168卷 / 02期

关键词：

freshwater fluxes; global mass redistribution; GRACE; gravity field; ocean circulation;

D O I：

10.1111/j.1365-246X.2006.03247.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页码：527 / 532

页数：6