Gravity Variation in Siberia: GRACE Observation and Possible Causes
We report the finding, from the GRACE observation, of an increasing trend in the gravity anomaly in Siberia at the rate of up to 0.5 ugal yr-1 during 2003/1 - 2009/12, in the backdrop of a negative anomaly of magnitude on the order of ~-10 mgal. In consideration of the non-uniqueness of the gravitat...
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ftdoajarticles:oai:doaj.org/article:0167e9a11ffc4d5cb1a2c4e46484fc73 2023-05-15T17:57:11+02:00 Gravity Variation in Siberia: GRACE Observation and Possible Causes Benjamin Fong Chao Yun Hao Wu ZiZhan Zhang Rokyo Ogawa 2011-01-01T00:00:00Z https://doaj.org/article/0167e9a11ffc4d5cb1a2c4e46484fc73 EN eng Springer http://tao.cgu.org.tw/images/attachments/v222p133.pdf https://doaj.org/toc/1017-0839 https://doaj.org/toc/2311-7680 1017-0839 2311-7680 10.3319/TAO.2010.07.26.03(TibXS) https://doaj.org/article/0167e9a11ffc4d5cb1a2c4e46484fc73 Terrestrial, Atmospheric and Oceanic Sciences, Vol 22, Iss 2, p 133 (2011) Gravity variation Siberia GRACE Glacial isostatic adjustment Permafrost Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 article 2011 ftdoajarticles 2022-12-30T23:53:13Z We report the finding, from the GRACE observation, of an increasing trend in the gravity anomaly in Siberia at the rate of up to 0.5 ugal yr-1 during 2003/1 - 2009/12, in the backdrop of a negative anomaly of magnitude on the order of ~-10 mgal. In consideration of the non-uniqueness of the gravitational inverse problem, we examine in some detail the various possible geophysical causes to explain the increasing gravity signal. We find two geophysical mechanisms being the most plausible, namely the melting of permafrost and the GIA post-glacial rebound. We conclude that these two mechanisms cannot be ruled out as causes for the regional gravity increase in Siberia, based on gravity data and in want of ancillary geophysical data in the region. More definitive identification of the contributions of the various causes awaits further studies. Article in Journal/Newspaper permafrost Siberia Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Gravity variation Siberia GRACE Glacial isostatic adjustment Permafrost Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Gravity variation Siberia GRACE Glacial isostatic adjustment Permafrost Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 Benjamin Fong Chao Yun Hao Wu ZiZhan Zhang Rokyo Ogawa Gravity Variation in Siberia: GRACE Observation and Possible Causes |
topic_facet |
Gravity variation Siberia GRACE Glacial isostatic adjustment Permafrost Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
description |
We report the finding, from the GRACE observation, of an increasing trend in the gravity anomaly in Siberia at the rate of up to 0.5 ugal yr-1 during 2003/1 - 2009/12, in the backdrop of a negative anomaly of magnitude on the order of ~-10 mgal. In consideration of the non-uniqueness of the gravitational inverse problem, we examine in some detail the various possible geophysical causes to explain the increasing gravity signal. We find two geophysical mechanisms being the most plausible, namely the melting of permafrost and the GIA post-glacial rebound. We conclude that these two mechanisms cannot be ruled out as causes for the regional gravity increase in Siberia, based on gravity data and in want of ancillary geophysical data in the region. More definitive identification of the contributions of the various causes awaits further studies. |
format |
Article in Journal/Newspaper |
author |
Benjamin Fong Chao Yun Hao Wu ZiZhan Zhang Rokyo Ogawa |
author_facet |
Benjamin Fong Chao Yun Hao Wu ZiZhan Zhang Rokyo Ogawa |
author_sort |
Benjamin Fong Chao |
title |
Gravity Variation in Siberia: GRACE Observation and Possible Causes |
title_short |
Gravity Variation in Siberia: GRACE Observation and Possible Causes |
title_full |
Gravity Variation in Siberia: GRACE Observation and Possible Causes |
title_fullStr |
Gravity Variation in Siberia: GRACE Observation and Possible Causes |
title_full_unstemmed |
Gravity Variation in Siberia: GRACE Observation and Possible Causes |
title_sort |
gravity variation in siberia: grace observation and possible causes |
publisher |
Springer |
publishDate |
2011 |
url |
https://doaj.org/article/0167e9a11ffc4d5cb1a2c4e46484fc73 |
genre |
permafrost Siberia |
genre_facet |
permafrost Siberia |
op_source |
Terrestrial, Atmospheric and Oceanic Sciences, Vol 22, Iss 2, p 133 (2011) |
op_relation |
http://tao.cgu.org.tw/images/attachments/v222p133.pdf https://doaj.org/toc/1017-0839 https://doaj.org/toc/2311-7680 1017-0839 2311-7680 10.3319/TAO.2010.07.26.03(TibXS) https://doaj.org/article/0167e9a11ffc4d5cb1a2c4e46484fc73 |
_version_ |
1766165573482315776 |