气候变化领域集成服务门户(CCPortal): Linkage among ice crystal microphysics, mesoscale dynamics, and cloud and precipitation structures revealed by collocated microwave radiometer and multifrequency radar observations

CCPortal

DOI	10.5194/acp-20-12633-2020
	Linkage among ice crystal microphysics, mesoscale dynamics, and cloud and precipitation structures revealed by collocated microwave radiometer and multifrequency radar observations
	Gong J.; Zeng X.; L. Wu D.; Joseph Munchak S.; Li X.; Kneifel S.; Ori D.; Liao L.; Barahona D.
发表日期	2020
ISSN	1680-7316
起始页码	12633
结束页码	12653
卷号	20 期号:21
英文摘要	Ice clouds and falling snow are ubiquitous globally and play important roles in the Earth s radiation budget and precipitation processes. Ice particle microphysical properties (e.g., size, habit and orientation) are not only influenced by the ambient environment s dynamic and thermodynamic conditions, but are also intimately connected to the cloud radiative effects and particle fall speeds, which therefore have an impact on future climate projection as well as on the details of the surface precipitation (e.g., onset time, location, type and strength). Our previous work revealed that high-frequency (>150 GHz) polarimetric radiance difference (PD) from passive microwave sensors is a good indicator of the bulk aspect ratio of horizontally oriented ice particles that often occur inside anvil clouds and/or stratiform precipitation. In this current work, we further investigate the dynamic and thermodynamic mechanisms and cloud precipitation structures associated with ice-phase microphysics corresponding to different PD signals. In order to do so, collocated CloudSat radar (W-band) and Global Precipitation Measurement Dual-frequency Precipitation Radar (GPM DPR, Ku Ka-bands) observations as well as European Centre for Medium-Range Weather Forecasts (ECMWF) atmosphere background profiles are grouped according to the magnitude of PD for only stratiform precipitation and/or anvil cloud scenes. We found that horizontally oriented snow aggregates or large snow particles are likely the major contributor to the high-PD signals at 166 GHz, while low-PD magnitudes can be attributed to small cloud ice, randomly oriented snow aggregates, riming snow or supercooled water. Further, high-PD (low-PD) scenes are found to be associated with stronger (weaker) wind shear and higher (lower) ambient humidity, both of which help promote (prohibit) the growth of frozen particles and the organization of convective systems. An ensemble of squall line cases is studied at the end to demonstrate that the PD asymmetry in the leading and trailing edges of the deep convection line is closely tied to the anvil cloud and stratiform precipitation layers, respectively, suggesting the potential usefulness of PD as a proxy of stratiform convective precipitation flag, as well as a proxy of convection life stage. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	atmospheric convection; climate prediction; cloud microphysics; CloudSat; ice crystal; mesoscale motion; microwave radiometer; precipitation (climatology); thermodynamics; Indicator indicator
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247427
作者单位	Universities Space Research Association, Columbia, MD 21046, United States; Nasa Goddard Space Flight Center, Greenbelt, MD 20771, United States; Army Research Laboratory, Adelphi, MD 20783, United States; Morgan State University, Baltimore, MD 21251, United States; Institution for Geophysics and Meteorology, University of Cologne, Cologne, 50923, Germany
推荐引用方式 GB/T 7714	Gong J.,Zeng X.,L. Wu D.,et al. Linkage among ice crystal microphysics, mesoscale dynamics, and cloud and precipitation structures revealed by collocated microwave radiometer and multifrequency radar observations[J],2020,20(21).
APA	Gong J..,Zeng X..,L. Wu D..,Joseph Munchak S..,Li X..,...&Barahona D..(2020).Linkage among ice crystal microphysics, mesoscale dynamics, and cloud and precipitation structures revealed by collocated microwave radiometer and multifrequency radar observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Gong J.,et al."Linkage among ice crystal microphysics, mesoscale dynamics, and cloud and precipitation structures revealed by collocated microwave radiometer and multifrequency radar observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).