Keil, Christian and Röpnack, Andreas and Craig, George C. and Schumann, Ulrich (2008) Sensitivity of quantitative precipitation forecast to height dependent changes in humidity. Geophysical Research Letters, 35 (L09812), pp. 1-5. Wiley. doi: 10.1029/2008GL033657.
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Official URL: http://www.agu.org/journals/gl/
Abstract
The impact of humidity variations on QPF is studied performing a series of sensitivity experiments with the COSMO model at a horizontal mesh size of 7 km. Generally, variations of humidity in the boundary layer have the largest impact on precipitation, and the sensitivity decreases with height. An increase of humidity by 10% in the boundary layer is equivalent to an increase of 20% in the mid-troposphere. While the impact of humidity variation on stratiform precipitation persists throughout the 36-h forecast period, the impact diminishes after 24 h in the convective rainfall area. Increasing the boundary layer humidity by 30% leads to a 6 h earlier initiation of convection and a five times larger precipitation amount in the convective area, whereas it is doubled in the stratiform region. These results indicate that accurate measurements of humidity in the boundary layer are most important for QPF.
Item URL in elib: | https://elib.dlr.de/54288/ | |||||||||||||||
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Document Type: | Article | |||||||||||||||
Title: | Sensitivity of quantitative precipitation forecast to height dependent changes in humidity | |||||||||||||||
Authors: |
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Date: | 2008 | |||||||||||||||
Journal or Publication Title: | Geophysical Research Letters | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | Yes | |||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||
Volume: | 35 | |||||||||||||||
DOI : | 10.1029/2008GL033657 | |||||||||||||||
Page Range: | pp. 1-5 | |||||||||||||||
Publisher: | Wiley | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | mesoscale modeling, humidity variation, COSMO, QPF, Lidar | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Aeronautics | |||||||||||||||
HGF - Program Themes: | L VU - Air Traffic and Environment (old) | |||||||||||||||
DLR - Research area: | Aeronautics | |||||||||||||||
DLR - Program: | L VU - Air Traffic and Environment | |||||||||||||||
DLR - Research theme (Project): | L - Air Traffic and Weather (old) | |||||||||||||||
Location: | Oberpfaffenhofen | |||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology | |||||||||||||||
Deposited By: | Freund, Jana | |||||||||||||||
Deposited On: | 05 Jun 2008 | |||||||||||||||
Last Modified: | 31 Jul 2019 19:22 |
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