当前位置: X-MOL 学术Meteorol. Atmos. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Characteristics of pre-monsoon convective systems over south peninsular India and neighborhood using tropical rainfall measuring mission's precipitation radar
Meteorology and Atmospheric Physics ( IF 1.9 ) Pub Date : 2020-04-30 , DOI: 10.1007/s00703-020-00740-7
Geeta Agnihotri , K. C. Gouda , Someshwar Das

Ten-year climatology of physical properties of convective echoes during pre-monsoon season over south peninsular India and neighborhood are studied using Precipitation Radar dataset onboard Tropical Rainfall Measuring Mission satellite. Attenuation corrected radar reflectivity ( Z e ) is used to define an intense convective echo (ICE) which is a group of two or more contiguous convective pixels with Z e exceeding 30 dBZ. Height distribution of ICE is right skewed, single modal with mean and median as 7.8 and 7.3 kms. The ICE with area in range of more than 10 2 to 10 3 km 2 ( C ) are most frequent (58.5%) followed by smallest scale ( D ) having area ≤ 10 2 km 2 (37.2%). Large ICE’s ( B / C scale) are less frequent (4.2%). Mean areas of ICE’s in D , C and B / C scales are 72.7, 279 and 1932 km 2 , respectively. The relation between height and area is linear indicating that taller ICE’s are broader. The mean top heights of D , C and B / C scales are 5.5, 8.7 and 14.2 km, respectively. Frequency distributions of the height of 30 and 40 dBZ show single peaks at 5.5 and 4.75 km. Mean heights of 30 dBZ and 40 dBZ are 5.7 and 4.8 km while median heights are 5.5 and 4.7 km. Their cumulative frequency distribution shows that 6 and 3% of ICE cross 10 km height. Reflectivity structures of ICE show that systems over land are intense compared to that over ocean.

中文翻译:

利用热带雨量测量任务的降水雷达研究印度半岛南部及邻近地区季风前对流系统的特征

使用热带降雨测量任务卫星上的降水雷达数据集研究了印度半岛南部和附近季风季节前对流回波物理特性的十年气候学。衰减校正雷达反射率 (Z e ) 用于定义强对流回波 (ICE),它是一组两个或多个连续对流像素,Z e 超过 30 dBZ。ICE 的高度分布是右偏的,单模态,均值和中值分别为 7.8 和 7.3 公里。面积在10 2 到10 3 km 2 ( C ) 范围内的ICE 最为频繁(58.5%),其次是面积≤ 10 2 km 2 的最小尺度( D ) (37.2%)。大型 ICE(B / C 等级)的频率较低(4.2%)。D、C 和 B/C 尺度中 ICE 的平均面积分别为 72.7、279 和 1932 km 2 。高度和面积之间的关系是线性的,表明更高的 ICE 更宽。D、C和B/C尺度的平均顶高分别为5.5、8.7和14.2公里。30 和 40 dBZ 高度的频率分布在 5.5 和 4.75 公里处显示单峰。30 dBZ 和 40 dBZ 的平均高度分别为 5.7 和 4.8 公里,而中间高度为 5.5 和 4.7 公里。他们的累积频率分布显示,6% 和 3% 的 ICE 跨越 10 公里高度。ICE 的反射率结构表明,与海洋相比,陆地上的系统强度更高。8 公里,而中间高度分别为 5.5 和 4.7 公里。他们的累积频率分布显示,6% 和 3% 的 ICE 跨越 10 公里高度。ICE 的反射率结构表明,与海洋相比,陆地上的系统强度更高。8 公里,而中间高度分别为 5.5 和 4.7 公里。他们的累积频率分布显示,6% 和 3% 的 ICE 跨越 10 公里高度。ICE 的反射率结构表明,与海洋相比,陆地上的系统强度更高。
更新日期:2020-04-30
down
wechat
bug