Summary
Simulations of the katabatic wind system over the Greenland ice sheet for the two months April and May 1997 were performed using the Norwegian Limited Area Model (NOR-LAM) with a horizontal resolution of 25 km. The model results are intercompared and validated against observational data from automat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.668.3275 2023-05-15T16:29:36+02:00 Summary T. Klein G. Heinemann D. H. Bromwich J. J. Cassano K. M. Hines The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.668.3275 http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.668.3275 http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf text 2000 ftciteseerx 2016-01-08T17:12:09Z Simulations of the katabatic wind system over the Greenland ice sheet for the two months April and May 1997 were performed using the Norwegian Limited Area Model (NOR-LAM) with a horizontal resolution of 25 km. The model results are intercompared and validated against observational data from automatic weather stations (AWS), global atmo-spheric analyses and instrumented aircraft observations of individual cases during that period. The NORLAM is able to simulate the synoptic developments and daily cycle of the katabatic wind system realistically. For most of the cases covered by aircraft observations, the model results agree very well with the measured developments and structures of the katabatic wind system in the lowest 400 m. Despite NORLAM’s general ability of reproducing the four-dimen-sional structure of the katabatic wind, problems occur in cases, when the synoptic background is not well captured by the analyses used as initial and boundary conditions for the model runs or where NORLAM fails to correctly predict the synoptic development. The katabatic wind intensity in the stable boundary layer is underestimated by the model in cases when the simulated synoptic forcing is too weak. An additional problem becomes obvious in cases when the model simulates clouds in contrast to the observations or when the simulated clouds are too thick compared to the observed cloud cover. In these cases, the excessive cloud amount prevents development of the katabatic wind in the model. 1. Text Greenland Ice Sheet Unknown Greenland |
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English |
description |
Simulations of the katabatic wind system over the Greenland ice sheet for the two months April and May 1997 were performed using the Norwegian Limited Area Model (NOR-LAM) with a horizontal resolution of 25 km. The model results are intercompared and validated against observational data from automatic weather stations (AWS), global atmo-spheric analyses and instrumented aircraft observations of individual cases during that period. The NORLAM is able to simulate the synoptic developments and daily cycle of the katabatic wind system realistically. For most of the cases covered by aircraft observations, the model results agree very well with the measured developments and structures of the katabatic wind system in the lowest 400 m. Despite NORLAM’s general ability of reproducing the four-dimen-sional structure of the katabatic wind, problems occur in cases, when the synoptic background is not well captured by the analyses used as initial and boundary conditions for the model runs or where NORLAM fails to correctly predict the synoptic development. The katabatic wind intensity in the stable boundary layer is underestimated by the model in cases when the simulated synoptic forcing is too weak. An additional problem becomes obvious in cases when the model simulates clouds in contrast to the observations or when the simulated clouds are too thick compared to the observed cloud cover. In these cases, the excessive cloud amount prevents development of the katabatic wind in the model. 1. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. Klein G. Heinemann D. H. Bromwich J. J. Cassano K. M. Hines |
spellingShingle |
T. Klein G. Heinemann D. H. Bromwich J. J. Cassano K. M. Hines Summary |
author_facet |
T. Klein G. Heinemann D. H. Bromwich J. J. Cassano K. M. Hines |
author_sort |
T. Klein |
title |
Summary |
title_short |
Summary |
title_full |
Summary |
title_fullStr |
Summary |
title_full_unstemmed |
Summary |
title_sort |
summary |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.668.3275 http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf |
geographic |
Greenland |
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Greenland |
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Greenland Ice Sheet |
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Greenland Ice Sheet |
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http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.668.3275 http://polarmet.osu.edu/PMG_publications/klein_heinemann_map_2001.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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