Characterizing the Supercooled Cloud over the TP Eastern Slope in 2016 via Himawari-8 Products DOI Creative Commons

Qiuyu Wu,

Jinghua Chen, Yan Yin

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(19), P. 3643 - 3643

Published: Sept. 29, 2024

Supercooled liquid water (SLW) refers to droplets in clouds that remain unfrozen at temperatures below 0 °C. SLW is an important intermediate hydrometeor the processes of snowfall and rainfall can modulate radiation budget. This study investigates distribution supercooled cloud over mainland China using East Asia–Pacific macro- microphysical properties dataset (2016), derived from Himawari-8 observations. The results show highest frequency liquid-phase stratus occur eastern slope Tibetan Plateau, western side Sichuan Basin. Additional mostly found Basin its adjacent areas southern China. In region with SLW, mechanical forcing Plateau causes convergence low-level airflow within basin, which also carries moisture forced ascend stably, creating a favorable condition for formation clouds. As continues ascend, it encounters mid-to-upper-level westerlies temperature inversion. At mid-to-upper level, exhibit stronger wind speeds, directing flow towards basin. Concurrently, inversion stabilizes atmospheric stratification, limiting further ascent airflow. restrain convection upward motion clouds, allowing exist persist extended period.

Language: Английский

Arctic Weather Satellite Sensitivity to Supercooled Liquid Water in Snowfall Conditions DOI Creative Commons

Andrea Camplani,

Paolo Sanò, Daniele Casella

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(22), P. 4164 - 4164

Published: Nov. 8, 2024

The aim of this study is to highlight the issue missed supercooled liquid water (SLW) detection in current radar/lidar derived products and investigate potential combined use EarthCARE mission Arctic Weather Satellite (AWS)—Microwave Radiometer (MWR) observations fill observational gap improve snowfall retrieval capabilities. presence SLW layers, which typical snowing clouds at high latitudes, represents a significant challenge for based on passive microwave (PMW) observations. strong emission effect has mask snowflake scattering signal high-frequency channels (>90 GHz) exploited retrieval, while capability product—which currently used as reference PMW-based algorithm—is limited cloud top due attenuation. In context, EarthCARE, equipped with both radar lidar, AWS-MWR, whose cover range from 50 GHz 325.15 GHz, offer unique opportunity retrieval. study, case analyzed by comparing available PMW AWS-MWR simulated signals different scenarios an extensive comparison CloudSat brightness temperature (TB) product corresponding carried out. Simulated TBs are obtained radiative transfer model applied precipitation profiles algorithm developed (CAPTIVATE). Different single models considered. This analysis highlights layers embedded sensitivity SLW. Moreover, new AWS very sensitive snowflakes atmosphere, unaffected Therefore, their combination measurements can be capabilities constrain microphysical properties.

Language: Английский

Citations

1
Characterizing the Supercooled Cloud over the TP Eastern Slope in 2016 via Himawari-8 Products DOI Creative Commons

Qiuyu Wu,

Jinghua Chen, Yan Yin

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(19), P. 3643 - 3643

Published: Sept. 29, 2024

Supercooled liquid water (SLW) refers to droplets in clouds that remain unfrozen at temperatures below 0 °C. SLW is an important intermediate hydrometeor the processes of snowfall and rainfall can modulate radiation budget. This study investigates distribution supercooled cloud over mainland China using East Asia–Pacific macro- microphysical properties dataset (2016), derived from Himawari-8 observations. The results show highest frequency liquid-phase stratus occur eastern slope Tibetan Plateau, western side Sichuan Basin. Additional mostly found Basin its adjacent areas southern China. In region with SLW, mechanical forcing Plateau causes convergence low-level airflow within basin, which also carries moisture forced ascend stably, creating a favorable condition for formation clouds. As continues ascend, it encounters mid-to-upper-level westerlies temperature inversion. At mid-to-upper level, exhibit stronger wind speeds, directing flow towards basin. Concurrently, inversion stabilizes atmospheric stratification, limiting further ascent airflow. restrain convection upward motion clouds, allowing exist persist extended period.

Language: Английский

Citations

0