Coupling WRF double-moment 6-class microphysics schemes to RRTMG radiation scheme in weather research forecasting model
Abstract
A method to explicitly calculate the effective radius of hydrometeors in the Weather Research Forecasting (WRF) double-moment 6-class (WDM6) microphysics scheme is designed to tackle the physical inconsistency in cloud properties between the microphysics and radiation processes. At each model time step, the calculated effective radii of hydrometeors from the WDM6 scheme are linked to the Rapid Radiative Transfer Model for GCMs (RRTMG) scheme to consider the cloud effects in radiative flux calculation. This coupling effect of cloud properties between the WDM6 and RRTMG algorithms is examined for a heavy rainfall event in Korea during 25–27 July 2011, and it is compared to the results from the control simulation in which the effective radius is prescribed as a constant value. It is found that the derived radii of hydrometeors in the WDM6 scheme are generally larger than the prescribed values in the RRTMG scheme. Consequently, shortwave fluxes reaching the ground (SWDOWN) are increased over less cloudy regions, showing a better agreement with a satellite image. The overall distribution of the 24-hour accumulated rainfall is not affected but its amount is changed. In conclusion, a spurious rainfall peak over the Yellow Sea is alleviated, whereas the local maximum in the centralmore »
- Authors:
-
- Korea Institute of Atmospheric Prediction Systems (KIAPS), Seoul (Republic of Korea)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1310745
- Report Number(s):
- PNNL-SA-118323
Journal ID: ISSN 1687-9309; PII: 5070154; 5070154
- Grant/Contract Number:
- AC0576RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advances in Meteorology
- Additional Journal Information:
- Journal Volume: 2016; Journal ID: ISSN 1687-9309
- Publisher:
- Hindawi
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Bae, Soo Ya, Hong, Song -You, and Lim, Kyo-Sun Sunny. Coupling WRF double-moment 6-class microphysics schemes to RRTMG radiation scheme in weather research forecasting model. United States: N. p., 2016.
Web. doi:10.1155/2016/5070154.
Bae, Soo Ya, Hong, Song -You, & Lim, Kyo-Sun Sunny. Coupling WRF double-moment 6-class microphysics schemes to RRTMG radiation scheme in weather research forecasting model. United States. https://doi.org/10.1155/2016/5070154
Bae, Soo Ya, Hong, Song -You, and Lim, Kyo-Sun Sunny. Fri .
"Coupling WRF double-moment 6-class microphysics schemes to RRTMG radiation scheme in weather research forecasting model". United States. https://doi.org/10.1155/2016/5070154. https://www.osti.gov/servlets/purl/1310745.
@article{osti_1310745,
title = {Coupling WRF double-moment 6-class microphysics schemes to RRTMG radiation scheme in weather research forecasting model},
author = {Bae, Soo Ya and Hong, Song -You and Lim, Kyo-Sun Sunny},
abstractNote = {A method to explicitly calculate the effective radius of hydrometeors in the Weather Research Forecasting (WRF) double-moment 6-class (WDM6) microphysics scheme is designed to tackle the physical inconsistency in cloud properties between the microphysics and radiation processes. At each model time step, the calculated effective radii of hydrometeors from the WDM6 scheme are linked to the Rapid Radiative Transfer Model for GCMs (RRTMG) scheme to consider the cloud effects in radiative flux calculation. This coupling effect of cloud properties between the WDM6 and RRTMG algorithms is examined for a heavy rainfall event in Korea during 25–27 July 2011, and it is compared to the results from the control simulation in which the effective radius is prescribed as a constant value. It is found that the derived radii of hydrometeors in the WDM6 scheme are generally larger than the prescribed values in the RRTMG scheme. Consequently, shortwave fluxes reaching the ground (SWDOWN) are increased over less cloudy regions, showing a better agreement with a satellite image. The overall distribution of the 24-hour accumulated rainfall is not affected but its amount is changed. In conclusion, a spurious rainfall peak over the Yellow Sea is alleviated, whereas the local maximum in the central part of the peninsula is increased.},
doi = {10.1155/2016/5070154},
journal = {Advances in Meteorology},
number = ,
volume = 2016,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2016},
month = {Fri Jan 01 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Sensitivity study of the planetary boundary layer and microphysical schemes to the initialization of convection over the Arabian Peninsula
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Sensitivity study of the planetary boundary layer and microphysical schemes to the initialization of convection over the Arabian Peninsula
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