How Baltic Sea water mass variations mask the postglacial rebound signal in CHAMP and GRACE gravity field solutions

被引：5

作者：

Wiehl, M ^{[1
]}

Dietrich, R ^{[1
]}

Lehmann, A ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Planetare Geodasie, D-01062 Dresden, Germany

来源：

EARTH OBSERVATION WITH CHAMP: RESULTS FROM THREE YEARS ORBIT | 2005年

关键词：

time-variable gravity; postglacial rebound; oceanographic variations; Fennoscandia; Baltic Sea;

D O I：

10.1007/3-540-26800-6_29

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 postglacial rebound (PGR) in Fennoscandia is an attractive signal for the detection of time-variable gravity with CHAMP and GRACE. However, the separation from other geophysical signals is a challenge. We study the influence of oceanographic variations of the Baltic Sea. Using a precise high-resolution oceanographic model we analyze its water mass variations and the resulting geoid signal. The geoid signal is similar to the postglacial rebound signal in spatial pattern mid in magnitude. Hence we show that the PGR detection from satellite gravity data will be corrupted by Baltic Sea oceanographic variations unless they are accounted for. Our study suggests to correct for the Baltic Sea signal using external data.

引用

页码：181 / 186

页数：6