Microphysical Characteristics of Raindrop Size Distribution and Implications for Dual-Polarization Radar Quantitative Precipitation Estimations in the Tianshan Mountains, China

被引：7

作者：

Zeng, Yong ^{[1
,2
,3
]}

Li, Jiangang ^{[1
,2
,3
]}

Yang, Lianmei ^{[1
,2
,3
]}

Li, Haoyang ^{[1
,2
,3
]}

Li, Xiaomeng ^{[1
,2
,3
]}

Tong, Zepeng ^{[1
,2
,3
]}

Jiang, Yufei ^{[1
,2
,3
]}

Liu, Jing ^{[1
,2
,3
]}

Zhang, Jinru ^{[1
,2
,3
]}

Zhou, Yushu ^{[4
,5
]}

机构：

[1] China Meteorol Adm, Inst Desert Meteorol, Urumqi 830002, Peoples R China

[2] Field Sci Observat Base Cloud Precipitat Phys West, Urumqi 830002, Peoples R China

[3] Xinjiang Cloud Precipitat Phys & Cloud Water Resou, Urumqi 830002, Peoples R China

[4] Chinese Acad Sci, Inst Atmospher Phys, Lab Cloud Precipitat Phys & Severe Storms, Beijing 100029, Peoples R China

[5] Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China

来源：

REMOTE SENSING | 2023年 / 15卷 / 10期

基金：

中国国家自然科学基金;

关键词：

raindrop size distribution; dual-polarization radar; quantitative precipitation estimation; rain rate class; Tianshan Mountains; DROP SIZE; STATISTICAL CHARACTERISTICS; POLARIMETRIC RADAR; RAINFALL ESTIMATION; PART I; DISDROMETER; PARAMETERIZATION; SPECTRA; TAIWAN;

D O I：

10.3390/rs15102668

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In order to improve the understanding of the microphysical characteristics of raindrop size distribution (DSD) under different rainfall rates (R) classes, and broaden the knowledge of the impact of radar wavelengths and R classes on the QPE of dual-polarization radars in the Tianshan Mountains, a typical arid area in China, we investigated the microphysical characteristics of DSD across R classes and dual-polarimetric radar QPE relationships across radar wavelengths and R classes, based on the DSD data from a PARSIVEL(2) disdrometer at Zhaosu in the Tianshan Mountains during the summers of 2020 and 2021. As the R class increased, the DSD became wider and flatter. The mean value of the mass-weighted mean diameters (D-m) increased, while the mean value of logarithm normalized intercept parameters (log(10) N-w) decreased after increasing from C1 to C3, as the R class increased. The largest contributions to R and the radar reflectivity factor from large raindrops (diameter > 3 mm) accounted for approximately 50% and 97%, respectively, while 84% of the total raindrops were small raindrops (diameter < 1 mm). Dual-polarization radars-horizontal polarization reflectivity (Z(h)), differential reflectivity (Z(dr)), and specific differential phase (K-dp)-were retrieved based on the DSD data using the T-matrix scattering method. The DSD-based polarimetric radar QPE relations of a single-parameter (R(Z(h)), R(K-dp)), and double-parameters (R(Z(h),Z(dr)), R(K-dp,Z(dr))) on the S-, C-, and X-bands were derived and evaluated. Overall, the performance of the R(K-dp) (R(K-dp,Z(dr))) scheme was better than that of R(Z(h)) (R(Z(h),Z(dr))) for the QPE in the three bands. Furthermore, we have for the first time confirmed and quantified the performance differences in the QPE relationship of dual-polarization radars under different schemes, radar wavelengths, and R classes in typical arid areas of China. Therefore, selecting an appropriate dual-polarization radar band and QPE scheme for different R classes is necessary to improve the QPE ability compared with an independent scheme under all R classes.

引用

页数：19

共 83 条

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