Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dust effects on mixed-phase clouds and precipitation during a super dust storm over northern China
https://orcid.org/0000-0003-1284-2283
https://orcid.org/0000-0001-8310-6975
https://orcid.org/0000-0001-7674-811X
Abstract Dust aerosols have been generally regarded as efficient ice nuclei (IN), but their influences on mixed-phase clouds and precipitation are poorly quantified. In this study, combining satellite observations, reanalysis data and the Weather Research and Forecasting (WRF) model, we investigate the impacts of dust aerosols on mixed-phase clouds and precipitation during a super dust storm over northern China. The Suomi National Polar-Orbiting Partnership (S-NPP) satellite observed a super dust storm from March 15–19, 2021 in northern China, followed by heavy precipitation between March 17 and 19. The results showed that the occurrence of super dust storms may play an important role in cloud formation and precipitation processes. Furthermore, numerical modeling revealed that dust aerosols can increase the ice crystal number concentration (QNi) and decrease the cloud droplet number concentration (QNc) in mixed-phase clouds through the Wegener–Bergeron–Findeisen (WBF) process, in which the maximum increase in QNi can reach 21%. Simultaneously, the mass mixing ratios of rain, graupel and snow increased due to dust aerosols. Consequently, precipitation could increase by up to 9.8% in northern China. This study could provide evidence for understanding the mechanisms of dust effects on mixed-phase clouds over northern China.
Graphical abstract Time series of the domain–averaged (a) dust AOD (black) and cloud fraction (red), (b) liquid/ice water path (black/blue, unit: g·m−2) and cloud optical depth (red) over the study region from 15–19 March. The dust AOD and cloud parameters are derived from MERRA-2 and CERES products, respectively. (c) Effects of dust on precipitation, QNc, QNi, REc and REi from 17 to 19 March 2021 derived from model simulations (units: %). Display Omitted
Highlights The occurrence of heavy dust storms may play an important role in cloud formation and precipitation processes. Dust aerosols can enhance rainfall by increasing the number of ice crystals in mixed-phase clouds. Dust aerosols can induce a maximum increase in the daily precipitation up to 9.8%.
Dust effects on mixed-phase clouds and precipitation during a super dust storm over northern China
https://orcid.org/0000-0003-1284-2283
https://orcid.org/0000-0001-8310-6975
https://orcid.org/0000-0001-7674-811X
Abstract Dust aerosols have been generally regarded as efficient ice nuclei (IN), but their influences on mixed-phase clouds and precipitation are poorly quantified. In this study, combining satellite observations, reanalysis data and the Weather Research and Forecasting (WRF) model, we investigate the impacts of dust aerosols on mixed-phase clouds and precipitation during a super dust storm over northern China. The Suomi National Polar-Orbiting Partnership (S-NPP) satellite observed a super dust storm from March 15–19, 2021 in northern China, followed by heavy precipitation between March 17 and 19. The results showed that the occurrence of super dust storms may play an important role in cloud formation and precipitation processes. Furthermore, numerical modeling revealed that dust aerosols can increase the ice crystal number concentration (QNi) and decrease the cloud droplet number concentration (QNc) in mixed-phase clouds through the Wegener–Bergeron–Findeisen (WBF) process, in which the maximum increase in QNi can reach 21%. Simultaneously, the mass mixing ratios of rain, graupel and snow increased due to dust aerosols. Consequently, precipitation could increase by up to 9.8% in northern China. This study could provide evidence for understanding the mechanisms of dust effects on mixed-phase clouds over northern China.
Graphical abstract Time series of the domain–averaged (a) dust AOD (black) and cloud fraction (red), (b) liquid/ice water path (black/blue, unit: g·m−2) and cloud optical depth (red) over the study region from 15–19 March. The dust AOD and cloud parameters are derived from MERRA-2 and CERES products, respectively. (c) Effects of dust on precipitation, QNc, QNi, REc and REi from 17 to 19 March 2021 derived from model simulations (units: %). Display Omitted
Highlights The occurrence of heavy dust storms may play an important role in cloud formation and precipitation processes. Dust aerosols can enhance rainfall by increasing the number of ice crystals in mixed-phase clouds. Dust aerosols can induce a maximum increase in the daily precipitation up to 9.8%.
Dust effects on mixed-phase clouds and precipitation during a super dust storm over northern China
https://orcid.org/0000-0003-1284-2283
https://orcid.org/0000-0001-8310-6975
https://orcid.org/0000-0001-7674-811X
Abstract Dust aerosols have been generally regarded as efficient ice nuclei (IN), but their influences on mixed-phase clouds and precipitation are poorly quantified. In this study, combining satellite observations, reanalysis data and the Weather Research and Forecasting (WRF) model, we investigate the impacts of dust aerosols on mixed-phase clouds and precipitation during a super dust storm over northern China. The Suomi National Polar-Orbiting Partnership (S-NPP) satellite observed a super dust storm from March 15–19, 2021 in northern China, followed by heavy precipitation between March 17 and 19. The results showed that the occurrence of super dust storms may play an important role in cloud formation and precipitation processes. Furthermore, numerical modeling revealed that dust aerosols can increase the ice crystal number concentration (QNi) and decrease the cloud droplet number concentration (QNc) in mixed-phase clouds through the Wegener–Bergeron–Findeisen (WBF) process, in which the maximum increase in QNi can reach 21%. Simultaneously, the mass mixing ratios of rain, graupel and snow increased due to dust aerosols. Consequently, precipitation could increase by up to 9.8% in northern China. This study could provide evidence for understanding the mechanisms of dust effects on mixed-phase clouds over northern China.
Graphical abstract Time series of the domain–averaged (a) dust AOD (black) and cloud fraction (red), (b) liquid/ice water path (black/blue, unit: g·m−2) and cloud optical depth (red) over the study region from 15–19 March. The dust AOD and cloud parameters are derived from MERRA-2 and CERES products, respectively. (c) Effects of dust on precipitation, QNc, QNi, REc and REi from 17 to 19 March 2021 derived from model simulations (units: %). Display Omitted
Highlights The occurrence of heavy dust storms may play an important role in cloud formation and precipitation processes. Dust aerosols can enhance rainfall by increasing the number of ice crystals in mixed-phase clouds. Dust aerosols can induce a maximum increase in the daily precipitation up to 9.8%.
Dust effects on mixed-phase clouds and precipitation during a super dust storm over northern China
Luo, Run (Autor:in) / Liu, Yuzhi (Autor:in) / Luo, Min (Autor:in) / Li, Dan (Autor:in) / Tan, Ziyuan (Autor:in) / Shao, Tianbin (Autor:in) / Alam, Khan (Autor:in)
Atmospheric Environment ; 313
10.09.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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