The study of large-scale variability in total water storage within the context of modern satellite gravity missions
The analysis of Earth’s gravity field changes is the one of essential task of physical geodesy. So the knowledge about selected characteristics of gravity field is the basic element of the Earth shape determining process and help to find information about mass redistribution in the Earth system. Sin...
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ftdoajarticles:oai:doaj.org/article:061d49fccc744a1984b0bceed8660c56 2023-10-09T21:47:05+02:00 The study of large-scale variability in total water storage within the context of modern satellite gravity missions Jan Mikocki Artur Leńczuk Janusz Bogusz 2021-12-01T00:00:00Z https://doi.org/10.5604/01.3001.0016.0554 https://doaj.org/article/061d49fccc744a1984b0bceed8660c56 EN PL eng pol Military University of Technology, Warsaw http://biuletynwat.pl/gicid/01.3001.0016.0554 http://biuletynwat.pl/gicid/pdf/01.3001.0016.0554 https://doaj.org/toc/1234-5865 1234-5865 doi:10.5604/01.3001.0016.0554 https://doaj.org/article/061d49fccc744a1984b0bceed8660c56 Biuletyn Wojskowej Akademii Technicznej, Vol 70, Iss 4, Pp 147-159 (2021) GRACE TWS land hydrology gravity missions Technology T article 2021 ftdoajarticles https://doi.org/10.5604/01.3001.0016.0554 2023-09-10T00:47:23Z The analysis of Earth’s gravity field changes is the one of essential task of physical geodesy. So the knowledge about selected characteristics of gravity field is the basic element of the Earth shape determining process and help to find information about mass redistribution in the Earth system. Since 2002, the gravity field changes have been successfully observed by the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission and its continued GRACE-FO (GRACE Follow-On) mission. The results obtained from GRACE/GRACE-FO observations are presented, among other, in form of mascons and they are provid-ed by three processing centers: (1) Center for Space Research (CSR; Austin, United States), (2) Jet Propulsion Laboratory (JPL; Pasadena, United States), and (3) Goddard Space Flight Center (GSFC; Maryland, United States). In the following study, we used data provided by GSFC in form of the global distribution of Total Water Storage (TWS), which are expressed in terms of Equivalent Water Height (EWH). In our study, we focused on identifying areas with significant changes in TWS. We analysed TWS fluctuations in seasonal short-term changes, i.e., amplitude of annual oscillation (the most pronounced oscillation in the land hydro-sphere) and longterm changes, i.e., trend (a key parameter for climate studies) determined using the Least Squares Method. As a result, we selected 15 areas characterised by extreme TWS changes, i.e., 11 areas for annual amplitude and 4 areas for trend parameter. We obtained seasonal changes greater than 140 mm in areas within the equator (mainly Amazon, Niger, Ganges, Brahmaputra river basin regions) and areas covered by huge ice masses (Alaska, Greenland). The greatest rate of change in water storage at ±70 is observed around West Antarctica, Patagonia or the Caspian Sea. The results also emphasize the significant human impact in continental water masses (e.g. Mexico, Indus and Ganges river basins). Keywords: GRACE, TWS, land hydrology, gravity missions Article in Journal/Newspaper Antarc* Antarctica Greenland West Antarctica Alaska Directory of Open Access Journals: DOAJ Articles Austin Greenland Patagonia West Antarctica Bulletin of the Military University of Technology 70 4 147 159 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Polish |
topic |
GRACE TWS land hydrology gravity missions Technology T |
spellingShingle |
GRACE TWS land hydrology gravity missions Technology T Jan Mikocki Artur Leńczuk Janusz Bogusz The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
topic_facet |
GRACE TWS land hydrology gravity missions Technology T |
description |
The analysis of Earth’s gravity field changes is the one of essential task of physical geodesy. So the knowledge about selected characteristics of gravity field is the basic element of the Earth shape determining process and help to find information about mass redistribution in the Earth system. Since 2002, the gravity field changes have been successfully observed by the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission and its continued GRACE-FO (GRACE Follow-On) mission. The results obtained from GRACE/GRACE-FO observations are presented, among other, in form of mascons and they are provid-ed by three processing centers: (1) Center for Space Research (CSR; Austin, United States), (2) Jet Propulsion Laboratory (JPL; Pasadena, United States), and (3) Goddard Space Flight Center (GSFC; Maryland, United States). In the following study, we used data provided by GSFC in form of the global distribution of Total Water Storage (TWS), which are expressed in terms of Equivalent Water Height (EWH). In our study, we focused on identifying areas with significant changes in TWS. We analysed TWS fluctuations in seasonal short-term changes, i.e., amplitude of annual oscillation (the most pronounced oscillation in the land hydro-sphere) and longterm changes, i.e., trend (a key parameter for climate studies) determined using the Least Squares Method. As a result, we selected 15 areas characterised by extreme TWS changes, i.e., 11 areas for annual amplitude and 4 areas for trend parameter. We obtained seasonal changes greater than 140 mm in areas within the equator (mainly Amazon, Niger, Ganges, Brahmaputra river basin regions) and areas covered by huge ice masses (Alaska, Greenland). The greatest rate of change in water storage at ±70 is observed around West Antarctica, Patagonia or the Caspian Sea. The results also emphasize the significant human impact in continental water masses (e.g. Mexico, Indus and Ganges river basins). Keywords: GRACE, TWS, land hydrology, gravity missions |
format |
Article in Journal/Newspaper |
author |
Jan Mikocki Artur Leńczuk Janusz Bogusz |
author_facet |
Jan Mikocki Artur Leńczuk Janusz Bogusz |
author_sort |
Jan Mikocki |
title |
The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
title_short |
The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
title_full |
The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
title_fullStr |
The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
title_full_unstemmed |
The study of large-scale variability in total water storage within the context of modern satellite gravity missions |
title_sort |
study of large-scale variability in total water storage within the context of modern satellite gravity missions |
publisher |
Military University of Technology, Warsaw |
publishDate |
2021 |
url |
https://doi.org/10.5604/01.3001.0016.0554 https://doaj.org/article/061d49fccc744a1984b0bceed8660c56 |
geographic |
Austin Greenland Patagonia West Antarctica |
geographic_facet |
Austin Greenland Patagonia West Antarctica |
genre |
Antarc* Antarctica Greenland West Antarctica Alaska |
genre_facet |
Antarc* Antarctica Greenland West Antarctica Alaska |
op_source |
Biuletyn Wojskowej Akademii Technicznej, Vol 70, Iss 4, Pp 147-159 (2021) |
op_relation |
http://biuletynwat.pl/gicid/01.3001.0016.0554 http://biuletynwat.pl/gicid/pdf/01.3001.0016.0554 https://doaj.org/toc/1234-5865 1234-5865 doi:10.5604/01.3001.0016.0554 https://doaj.org/article/061d49fccc744a1984b0bceed8660c56 |
op_doi |
https://doi.org/10.5604/01.3001.0016.0554 |
container_title |
Bulletin of the Military University of Technology |
container_volume |
70 |
container_issue |
4 |
container_start_page |
147 |
op_container_end_page |
159 |
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1779309814277472256 |