A note on the annual wobble excitation due to the seasonal atmospheric loading on continents

Northern Eurasian continent has been regarded to contribute as the major source area, of which seasonal atmospheric pressure loading and unloading cycle leads to the annual wobble of the Earth. In the early days when reliable data of global coverage were not accessible, this dominance has remained a...

Full description

Saved in:
Bibliographic Details
Published in:TAO : Terrestrial, atmospheric, and oceanic sciences atmospheric, and oceanic sciences, 2018-12, Vol.29 (6), p.721-729
Main Authors: Cho, Jungho, Seo, Ki-Weon, Youm, Kook-Hyoun, Shen, Wenbin
Format: Article
Language:English
Subjects:
Annual
Atmospheric pressure
Continents
Earth
Earth motion
Earth's wobble
Excitation
Movement
Seasonal variation
Seasonal variations
Temperature
Unloading
Weather forecasting
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Northern Eurasian continent has been regarded to contribute as the major source area, of which seasonal atmospheric pressure loading and unloading cycle leads to the annual wobble of the Earth. In the early days when reliable data of global coverage were not accessible, this dominance has remained as only a hypothesis. Nowadays, however, European Centre for Medium-Range Weather Forecasts and National Centers for Environmental Prediction produce reliable datasets, therefore, such unique feature has become clearer with quantitative evidences. Having both the Earth’s polar motion and the global atmospheric state known with unprecedented accuracy, we hereby identify and scrutinize whether Siberia and Manchuria dominate the annual polar motion of the Earth. Key points • Annual wobble of the Earth is a forced motion caused by diverse seasonal variation • Winter cold air on Siberia has been regarded as one major source of the annual wobble • The excitations due to atmospheric loading on continents are compared with the observation
ISSN:1017-0839
2311-7680
DOI:10.3319/TAO.2018.08.24.01