Multiple Hydrometeors All-Sky Microwave Radiance Assimilation in FV3GFS

被引:15
|
作者
Tong, Mingjing [1 ,2 ]
Zhu, Yanqiu [3 ]
Zhou, Linjiong [2 ,4 ]
Liu, Emily [5 ]
Chen, Ming [6 ,7 ]
Liu, Quanhua [8 ]
Lin, Shian-Jiann [2 ]
机构
[1] SAIC, Princeton, NJ 08544 USA
[2] NOAA GFDL, Princeton, NJ 08540 USA
[3] NCEP Environm Modeling Ctr, IM Syst Grp, College Pk, MD USA
[4] Princeton Univ, Program Atmospher & Ocean Sci, Princeton, NJ 08544 USA
[5] NCEP Environm Modeling Ctr, SRG, College Pk, MD USA
[6] NESDIS, College Pk, MD USA
[7] Univ Maryland, College Pk, MD 20742 USA
[8] NESDIS STAR, College Pk, MD USA
关键词
Radiative transfer;
D O I
10.1175/MWR-D-19-0231.1
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Motivated by the use of the GFDL microphysics scheme in the Finite-Volume Cubed-Sphere Dynamical Core Global Forecast System (FV3GFS), the all-sky radiance assimilation framework has been expanded to include precipitating hydrometeors. Adding precipitating hydrometeors allows the assimilation of precipitation-affected radiance in addition to cloudy radiance. In this upgraded all-sky framework, the five hydrometeors, including cloud liquid water, cloud ice, rain, snow, and graupel, are the new control variables, replacing the original cloud water control variable. The Community Radiative Transfer Model (CRTM) was interfaced with the newly added precipitating hydrometeors. Subgrid cloud variability was considered by using the average cloud overlap scheme. Multiple scattering radiative transfer was activated in the upgraded framework. Radiance observations from the Advanced Microwave Sounding Unit-A (AMSU-A) and the Advanced Technology Microwave Sounder (ATMS) over ocean were assimilated in all-sky approach. This new constructed all-sky framework shows neutral to positive impact on overall forecast skill. Improvement was found in 500-hPa geopotential height forecast in both Northern and Southern Hemispheres. Temperature forecast was also improved at 850 hPa in the Southern Hemisphere and the tropics.
引用
收藏
页码:2971 / 2995
页数:25
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