Quantifying Errors in Large Scale Water Balance
Assessment and prediction of the effects of Arctic river flows on ocean circulation and climate are hindered by lack of knowledge about the terrestrial water balance. This study quantifies the components of the annual water budget (precipitation, streamflow, and evapotranspiration) and their uncerta...
Main Author: | |
---|---|
Other Authors: | , , , |
Format: | Thesis |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | http://hdl.handle.net/1903/2146 |
id |
ftunivmaryland:oai:drum.lib.umd.edu:1903/2146 |
---|---|
record_format |
openpolar |
spelling |
ftunivmaryland:oai:drum.lib.umd.edu:1903/2146 2023-05-15T15:02:55+02:00 Quantifying Errors in Large Scale Water Balance Joe, Sommer Brubaker, Dr. Kaye L Digital Repository at the University of Maryland University of Maryland (College Park, Md.) Civil Engineering 2004-12-08 2696509 bytes application/pdf http://hdl.handle.net/1903/2146 en_US eng http://hdl.handle.net/1903/2146 Engineering Civil Hydrology Thesis 2004 ftunivmaryland 2022-11-11T11:11:42Z Assessment and prediction of the effects of Arctic river flows on ocean circulation and climate are hindered by lack of knowledge about the terrestrial water balance. This study quantifies the components of the annual water budget (precipitation, streamflow, and evapotranspiration) and their uncertainty for a large Russian river basin. Over long periods, assuming negligible change in storage, inputs and outputs should balance. However, measurement limitations and errors lead to nonzero water balance closure (WBC). The variance of WBC, computed by summing the component variances, quantifies uncertainty in the water budget. The component terms and their uncertainty are calculated from independent observations and physically-based modeling. For the analysis period, the WBC is negative. The computed uncertainty is large, but not sufficient to conclude that WBC could be zero. Because current assessments do not completely account for the water budget, statements about the effects of climate change must be done cautiously. Thesis Arctic Climate change University of Maryland: Digital Repository (DRUM) Arctic |
institution |
Open Polar |
collection |
University of Maryland: Digital Repository (DRUM) |
op_collection_id |
ftunivmaryland |
language |
English |
topic |
Engineering Civil Hydrology |
spellingShingle |
Engineering Civil Hydrology Joe, Sommer Quantifying Errors in Large Scale Water Balance |
topic_facet |
Engineering Civil Hydrology |
description |
Assessment and prediction of the effects of Arctic river flows on ocean circulation and climate are hindered by lack of knowledge about the terrestrial water balance. This study quantifies the components of the annual water budget (precipitation, streamflow, and evapotranspiration) and their uncertainty for a large Russian river basin. Over long periods, assuming negligible change in storage, inputs and outputs should balance. However, measurement limitations and errors lead to nonzero water balance closure (WBC). The variance of WBC, computed by summing the component variances, quantifies uncertainty in the water budget. The component terms and their uncertainty are calculated from independent observations and physically-based modeling. For the analysis period, the WBC is negative. The computed uncertainty is large, but not sufficient to conclude that WBC could be zero. Because current assessments do not completely account for the water budget, statements about the effects of climate change must be done cautiously. |
author2 |
Brubaker, Dr. Kaye L Digital Repository at the University of Maryland University of Maryland (College Park, Md.) Civil Engineering |
format |
Thesis |
author |
Joe, Sommer |
author_facet |
Joe, Sommer |
author_sort |
Joe, Sommer |
title |
Quantifying Errors in Large Scale Water Balance |
title_short |
Quantifying Errors in Large Scale Water Balance |
title_full |
Quantifying Errors in Large Scale Water Balance |
title_fullStr |
Quantifying Errors in Large Scale Water Balance |
title_full_unstemmed |
Quantifying Errors in Large Scale Water Balance |
title_sort |
quantifying errors in large scale water balance |
publishDate |
2004 |
url |
http://hdl.handle.net/1903/2146 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
http://hdl.handle.net/1903/2146 |
_version_ |
1766334829112066048 |