Characterization of runoff-storage relationships in boreal catchments
Due to global warming, Arctic sea ice has been shrinking steadily in recent decades, which is a concern to scientists and society. Freshwater inflow is crucial for the formation and preservation of sea ice, therefore the understanding of its status is helpful to assess the possible impact of sea ice...
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ftunivstutt:oai:elib.uni-stuttgart.de:11682/9865 2023-05-15T15:00:01+02:00 Characterization of runoff-storage relationships in boreal catchments Xia, Ruiheng 2018 https://doi.org/10.18419/opus-9848 http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-98656 http://elib.uni-stuttgart.de/handle/11682/9865 en eng 506295184 http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-98656 http://elib.uni-stuttgart.de/handle/11682/9865 http://dx.doi.org/10.18419/opus-9848 info:eu-repo/semantics/openAccess 550 620 masterThesis 2018 ftunivstutt https://doi.org/10.18419/opus-9848 2022-03-10T11:10:20Z Due to global warming, Arctic sea ice has been shrinking steadily in recent decades, which is a concern to scientists and society. Freshwater inflow is crucial for the formation and preservation of sea ice, therefore the understanding of its status is helpful to assess the possible impact of sea ice decline in the Arctic sea. Due to the continuous reduction of the gauging stations for river discharge, the scientists began to develop other methods like using spaceborne data to replace or supplement in situ measurements. This study aims at characterizing the runoff-storage (R-S) relationships in boreal catchments. GRACE observations of the time-dependent gravity field provide us with the measurements for the state of total water storage on land masses, which allow for a direct comparison of monthly runoff and water storage. Investigation of the R-S relationship in boreal catchments shows a distinct periodic behavior with a hysteresis. Motivated by the work of Riegger and Tourian (2014), the hypothesis of a R-S relationship characterized by the superposition of linear contributions from coupled/liquid storage and nonlinear contributions from uncoupled storage is investigated by means of remote sensing. MODIS snow coverage data is used to separate total water storage into liquid part and solid part. After a least-squares linear fit, the non-linear part of the RS relationship can be fully assigned to the solid storage while runoff and liquid storage can be characterized as a LTI system. This can then be used for direct determination of river runoff from GRACE mass and vice versa. Master Thesis Arctic Global warming Sea ice OPUS - Publication Server of the University of Stuttgart Arctic |
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OPUS - Publication Server of the University of Stuttgart |
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ftunivstutt |
language |
English |
topic |
550 620 |
spellingShingle |
550 620 Xia, Ruiheng Characterization of runoff-storage relationships in boreal catchments |
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550 620 |
description |
Due to global warming, Arctic sea ice has been shrinking steadily in recent decades, which is a concern to scientists and society. Freshwater inflow is crucial for the formation and preservation of sea ice, therefore the understanding of its status is helpful to assess the possible impact of sea ice decline in the Arctic sea. Due to the continuous reduction of the gauging stations for river discharge, the scientists began to develop other methods like using spaceborne data to replace or supplement in situ measurements. This study aims at characterizing the runoff-storage (R-S) relationships in boreal catchments. GRACE observations of the time-dependent gravity field provide us with the measurements for the state of total water storage on land masses, which allow for a direct comparison of monthly runoff and water storage. Investigation of the R-S relationship in boreal catchments shows a distinct periodic behavior with a hysteresis. Motivated by the work of Riegger and Tourian (2014), the hypothesis of a R-S relationship characterized by the superposition of linear contributions from coupled/liquid storage and nonlinear contributions from uncoupled storage is investigated by means of remote sensing. MODIS snow coverage data is used to separate total water storage into liquid part and solid part. After a least-squares linear fit, the non-linear part of the RS relationship can be fully assigned to the solid storage while runoff and liquid storage can be characterized as a LTI system. This can then be used for direct determination of river runoff from GRACE mass and vice versa. |
format |
Master Thesis |
author |
Xia, Ruiheng |
author_facet |
Xia, Ruiheng |
author_sort |
Xia, Ruiheng |
title |
Characterization of runoff-storage relationships in boreal catchments |
title_short |
Characterization of runoff-storage relationships in boreal catchments |
title_full |
Characterization of runoff-storage relationships in boreal catchments |
title_fullStr |
Characterization of runoff-storage relationships in boreal catchments |
title_full_unstemmed |
Characterization of runoff-storage relationships in boreal catchments |
title_sort |
characterization of runoff-storage relationships in boreal catchments |
publishDate |
2018 |
url |
https://doi.org/10.18419/opus-9848 http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-98656 http://elib.uni-stuttgart.de/handle/11682/9865 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Sea ice |
genre_facet |
Arctic Global warming Sea ice |
op_relation |
506295184 http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-98656 http://elib.uni-stuttgart.de/handle/11682/9865 http://dx.doi.org/10.18419/opus-9848 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.18419/opus-9848 |
_version_ |
1766332120015306752 |