Regional atmospheric influence on the Chandler wobble

被引：13
|
作者：
Zotov, L. V. [1 ,2 ]
Bizouard, C.
机构：
[1] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Lab Gravimetry, Moscow, Russia
[2] Natl Res Univ, Higher Sch Econ, Moscow, Russia
来源：
ADVANCES IN SPACE RESEARCH | 2015年 / 55卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
Earth rotation; AAM; Chandler wobble; POLAR MOTION; OCEANIC EXCITATION; ANGULAR-MOMENTUM; ROTATION; CLIMATE; AREAS;
D O I：
10.1016/j.asr.2014.12.013
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
From the maps of regional contribution to atmospheric angular momentum (AAM) over the period 1948-2011 (NCEP/NCAR reanalysis data) time domain excitation in Chandler frequency band was extracted by Panteleev's filtering method. This permits us to ihvestigate the evolution of the regional atmospheric influence on Chandler wobble. It appears that the temperate latitudes bring the strongest inputs. For pressure term they are limited to continents, and highlight the role of Europe. For the wind term they mostly result from ocean area, encompassing in particular North Atlantic. A quasi-20 year cycle is found in the regional patterns of the atmospheric excitation. The integrated AAM is finally compared with the geodetic excitation reconstructed from the observed polar motion. (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1300 / 1306
页数：7
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