Assessing global water mass transfers from continents to oceans over the period 1948–2016
Ocean mass and thus sea level is significantly affected by water storage on the continents. However, assessing the net contribution of continental water storage change to ocean mass change remains a challenge. We present an integrated version of the WaterGAP global hydrological model that is able to...
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ftdoajarticles:oai:doaj.org/article:1c83580612bc405fa228f164b1fad591 2023-05-15T14:03:12+02:00 Assessing global water mass transfers from continents to oceans over the period 1948–2016 D. Cáceres B. Marzeion J. H. Malles B. D. Gutknecht H. Müller Schmied P. Döll 2020-10-01T00:00:00Z https://doi.org/10.5194/hess-24-4831-2020 https://doaj.org/article/1c83580612bc405fa228f164b1fad591 EN eng Copernicus Publications https://hess.copernicus.org/articles/24/4831/2020/hess-24-4831-2020.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 doi:10.5194/hess-24-4831-2020 1027-5606 1607-7938 https://doaj.org/article/1c83580612bc405fa228f164b1fad591 Hydrology and Earth System Sciences, Vol 24, Pp 4831-4851 (2020) Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2020 ftdoajarticles https://doi.org/10.5194/hess-24-4831-2020 2022-12-31T02:40:29Z Ocean mass and thus sea level is significantly affected by water storage on the continents. However, assessing the net contribution of continental water storage change to ocean mass change remains a challenge. We present an integrated version of the WaterGAP global hydrological model that is able to consistently simulate total water storage anomalies (TWSAs) over the global continental area (except Greenland and Antarctica) by integrating the output from the global glacier model of Marzeion et al. (2012) as an input to WaterGAP. Monthly time series of global mean TWSAs obtained with an ensemble of four variants of the integrated model, corresponding to different precipitation input and irrigation water use assumptions, were validated against an ensemble of four TWSA solutions based on the Gravity Recovery and Climate Experiment (GRACE) satellite gravimetry from January 2003 to August 2016. With a mean Nash–Sutcliffe efficiency (NSE) of 0.87, simulated TWSAs fit well to observations. By decomposing the original TWSA signal into its seasonal, linear trend and interannual components, we found that seasonal and interannual variability are almost exclusively caused by the glacier-free land water storage anomalies (LWSAs). Seasonal amplitude and phase are very well reproduced ( NSE=0.88 ). The linear trend is overestimated by 30 %–50 % ( NSE=0.65 ), and interannual variability is captured to a certain extent ( NSE=0.57 ) by the integrated model. During the period 1948–2016, we find that continents lost 34–41 mm of sea level equivalent (SLE) to the oceans, with global glacier mass loss accounting for 81 % of the cumulated mass loss and LWSAs accounting for the remaining 19 %. Over 1948–2016, the mass gain on land from the impoundment of water in artificial reservoirs, equivalent to 8 mm SLE, was offset by the mass loss from water abstractions, amounting to 15–21 mm SLE and reflecting a cumulated groundwater depletion of 13–19 mm SLE. Climate-driven LWSAs are highly sensitive to precipitation input and correlate with El ... Article in Journal/Newspaper Antarc* Antarctica glacier Greenland Directory of Open Access Journals: DOAJ Articles Greenland Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Sutcliffe ENVELOPE(-81.383,-81.383,50.683,50.683) Hydrology and Earth System Sciences 24 10 4831 4851 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 D. Cáceres B. Marzeion J. H. Malles B. D. Gutknecht H. Müller Schmied P. Döll Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
topic_facet |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
Ocean mass and thus sea level is significantly affected by water storage on the continents. However, assessing the net contribution of continental water storage change to ocean mass change remains a challenge. We present an integrated version of the WaterGAP global hydrological model that is able to consistently simulate total water storage anomalies (TWSAs) over the global continental area (except Greenland and Antarctica) by integrating the output from the global glacier model of Marzeion et al. (2012) as an input to WaterGAP. Monthly time series of global mean TWSAs obtained with an ensemble of four variants of the integrated model, corresponding to different precipitation input and irrigation water use assumptions, were validated against an ensemble of four TWSA solutions based on the Gravity Recovery and Climate Experiment (GRACE) satellite gravimetry from January 2003 to August 2016. With a mean Nash–Sutcliffe efficiency (NSE) of 0.87, simulated TWSAs fit well to observations. By decomposing the original TWSA signal into its seasonal, linear trend and interannual components, we found that seasonal and interannual variability are almost exclusively caused by the glacier-free land water storage anomalies (LWSAs). Seasonal amplitude and phase are very well reproduced ( NSE=0.88 ). The linear trend is overestimated by 30 %–50 % ( NSE=0.65 ), and interannual variability is captured to a certain extent ( NSE=0.57 ) by the integrated model. During the period 1948–2016, we find that continents lost 34–41 mm of sea level equivalent (SLE) to the oceans, with global glacier mass loss accounting for 81 % of the cumulated mass loss and LWSAs accounting for the remaining 19 %. Over 1948–2016, the mass gain on land from the impoundment of water in artificial reservoirs, equivalent to 8 mm SLE, was offset by the mass loss from water abstractions, amounting to 15–21 mm SLE and reflecting a cumulated groundwater depletion of 13–19 mm SLE. Climate-driven LWSAs are highly sensitive to precipitation input and correlate with El ... |
format |
Article in Journal/Newspaper |
author |
D. Cáceres B. Marzeion J. H. Malles B. D. Gutknecht H. Müller Schmied P. Döll |
author_facet |
D. Cáceres B. Marzeion J. H. Malles B. D. Gutknecht H. Müller Schmied P. Döll |
author_sort |
D. Cáceres |
title |
Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
title_short |
Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
title_full |
Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
title_fullStr |
Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
title_full_unstemmed |
Assessing global water mass transfers from continents to oceans over the period 1948–2016 |
title_sort |
assessing global water mass transfers from continents to oceans over the period 1948–2016 |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/hess-24-4831-2020 https://doaj.org/article/1c83580612bc405fa228f164b1fad591 |
long_lat |
ENVELOPE(-62.350,-62.350,-74.233,-74.233) ENVELOPE(-81.383,-81.383,50.683,50.683) |
geographic |
Greenland Nash Sutcliffe |
geographic_facet |
Greenland Nash Sutcliffe |
genre |
Antarc* Antarctica glacier Greenland |
genre_facet |
Antarc* Antarctica glacier Greenland |
op_source |
Hydrology and Earth System Sciences, Vol 24, Pp 4831-4851 (2020) |
op_relation |
https://hess.copernicus.org/articles/24/4831/2020/hess-24-4831-2020.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 doi:10.5194/hess-24-4831-2020 1027-5606 1607-7938 https://doaj.org/article/1c83580612bc405fa228f164b1fad591 |
op_doi |
https://doi.org/10.5194/hess-24-4831-2020 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
24 |
container_issue |
10 |
container_start_page |
4831 |
op_container_end_page |
4851 |
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1766273760745226240 |