Effects of precipitation-bias corrections on surface hydrology over northern latitudes
Under-catch errors in precipitation gauge records can be as large as 50-100% during the cold season at high latitudes. To quantify the impacts of these errors on hydrometeorological fields, a comprehensive land surface model, namely the Community Land Model version 3 (CLM3), is run forced with (COF)...
Published in: | Journal of Geophysical Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2007
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-339 https://doi.org/10.1029/2007JD008420 |
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ftncar:oai:drupal-site.org:articles_6994 2023-10-01T03:54:07+02:00 Effects of precipitation-bias corrections on surface hydrology over northern latitudes Tian, Xiangjun (author) Dai, Aiguo (author) Yang, Daqing (author) Xie, Zhenghu (author) 2007-07-17 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-339 https://doi.org/10.1029/2007JD008420 en eng Journal of Geophysical Research http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-339 doi:10.1029/2007JD008420 ark:/85065/d7qc03rj Copyright 2007 American Geophysical Union. Text article 2007 ftncar https://doi.org/10.1029/2007JD008420 2023-09-04T18:22:10Z Under-catch errors in precipitation gauge records can be as large as 50-100% during the cold season at high latitudes. To quantify the impacts of these errors on hydrometeorological fields, a comprehensive land surface model, namely the Community Land Model version 3 (CLM3), is run forced with (COF) and without (CON) precipitation-bias corrections and other identical atmospheric forcing from 1973 to 2004. It is found that the enhanced snowfall induced by the bias corrections increases snow accumulation on the ground (by 6-18 cm for December to February), which in turn increases May to July runoff by 0.4-0.6 mm day-1 and streamflow by 5-25% for most major rivers in the northern latitudes (north of 45 degrees N). The precipitation-bias corrections also improve the model-simulated mean annual cycle and temporal variations of streamflow for the major northern rivers during 1973-2004. As a result, the simulation of the freshwater discharge into the Arctic Ocean is also improved. Only small and statistically insignificant changes are found in soil moisture content, surface evaporation, and sensible heat flux between the CON and COF runs. Nevertheless, the results still suggest that it is important to use bias-corrected precipitation in terrestrial water balance analyses and land surface modeling. Article in Journal/Newspaper Arctic Arctic Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Arctic Ocean Journal of Geophysical Research 112 D14 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Under-catch errors in precipitation gauge records can be as large as 50-100% during the cold season at high latitudes. To quantify the impacts of these errors on hydrometeorological fields, a comprehensive land surface model, namely the Community Land Model version 3 (CLM3), is run forced with (COF) and without (CON) precipitation-bias corrections and other identical atmospheric forcing from 1973 to 2004. It is found that the enhanced snowfall induced by the bias corrections increases snow accumulation on the ground (by 6-18 cm for December to February), which in turn increases May to July runoff by 0.4-0.6 mm day-1 and streamflow by 5-25% for most major rivers in the northern latitudes (north of 45 degrees N). The precipitation-bias corrections also improve the model-simulated mean annual cycle and temporal variations of streamflow for the major northern rivers during 1973-2004. As a result, the simulation of the freshwater discharge into the Arctic Ocean is also improved. Only small and statistically insignificant changes are found in soil moisture content, surface evaporation, and sensible heat flux between the CON and COF runs. Nevertheless, the results still suggest that it is important to use bias-corrected precipitation in terrestrial water balance analyses and land surface modeling. |
author2 |
Tian, Xiangjun (author) Dai, Aiguo (author) Yang, Daqing (author) Xie, Zhenghu (author) |
format |
Article in Journal/Newspaper |
title |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
spellingShingle |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
title_short |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
title_full |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
title_fullStr |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
title_full_unstemmed |
Effects of precipitation-bias corrections on surface hydrology over northern latitudes |
title_sort |
effects of precipitation-bias corrections on surface hydrology over northern latitudes |
publishDate |
2007 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-339 https://doi.org/10.1029/2007JD008420 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
Journal of Geophysical Research http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-339 doi:10.1029/2007JD008420 ark:/85065/d7qc03rj |
op_rights |
Copyright 2007 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2007JD008420 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
D14 |
_version_ |
1778521451288068096 |