Cloud Microphysical Budget Associated with Torrential Rainfall During the Landfall of Severe Tropical Storm Bilis (2006)

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  • Funds:

    Supported by the National (Key) Basic Research and Development (973) Program of China (2012CB417204), China Meteorological Administration Special Public Welfare Research Fund (GYHY200806007, GYHY201006014, and GYHY201206039), National Natural Science Foundation of China (40875022, 40633016, and 41175064), and Basic Research Project of the State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences.

  • doi: 10.1007/s13351-013-0210-z

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  • Effects of vertical wind shear, radiation, and ice clouds on cloud microphysical budget associated with torrential rainfall during landfall of severe tropical storm Bilis (2006) are investigated by using a series of analysis of two-day grid-scale sensitivity experiment data. When upper-tropospheric upward motions and lower-tropospheric downward motions occur on 15 July 2006, the removal of vertical wind shear and ice clouds increases rainfall contributions from the rainfall type (CM) associated with positive net condensation and hydrometeor loss/convergence, whereas the exclusion of cloud radiative effects and cloud-radiation interaction reduces rainfall contribution from CM. The elimination of vertical wind shear and cloud-radiation interaction increases rainfall contribution from the rainfall type (Cm) associated with positive net condensation and hydrometeor gain/divergence, but the removal of cloud radiative effects and ice clouds decreases rainfall contribution from Cm. The enhancements in rainfall contribution from the rainfall type (cM) associated with negative net condensation and hydrometeor loss/convergence are caused by the exclusion of cloud radiative effects, cloud-radiation interaction and ice clouds, whereas the reduction in rainfall contribution from cM results from the removal of vertical wind shear. When upward motions appear throughout the troposphere on 16 July, the exclusion of all these effects increases rainfall contribution from CM, but generally decreases rainfall contributions from Cm and cM.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Cloud Microphysical Budget Associated with Torrential Rainfall During the Landfall of Severe Tropical Storm Bilis (2006)

  • 1. State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;
    Science System and Applications,Inc.,Lanham,MD 20706,USA;
    State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;
    Department of Earth and Environment,Florida International University,Miami,FL 33199,USA;
    State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;
    NOAA/NESDIS/Center for Satellite Applications and Research,Camp Springs,MD 20746,USA;
    NASA/Goddard Space Flight Center,Greenbelt,MD 20771,USA
Funds: Supported by the National (Key) Basic Research and Development (973) Program of China (2012CB417204), China Meteorological Administration Special Public Welfare Research Fund (GYHY200806007, GYHY201006014, and GYHY201206039), National Natural Science Foundation of China (40875022, 40633016, and 41175064), and Basic Research Project of the State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences.

Abstract: Effects of vertical wind shear, radiation, and ice clouds on cloud microphysical budget associated with torrential rainfall during landfall of severe tropical storm Bilis (2006) are investigated by using a series of analysis of two-day grid-scale sensitivity experiment data. When upper-tropospheric upward motions and lower-tropospheric downward motions occur on 15 July 2006, the removal of vertical wind shear and ice clouds increases rainfall contributions from the rainfall type (CM) associated with positive net condensation and hydrometeor loss/convergence, whereas the exclusion of cloud radiative effects and cloud-radiation interaction reduces rainfall contribution from CM. The elimination of vertical wind shear and cloud-radiation interaction increases rainfall contribution from the rainfall type (Cm) associated with positive net condensation and hydrometeor gain/divergence, but the removal of cloud radiative effects and ice clouds decreases rainfall contribution from Cm. The enhancements in rainfall contribution from the rainfall type (cM) associated with negative net condensation and hydrometeor loss/convergence are caused by the exclusion of cloud radiative effects, cloud-radiation interaction and ice clouds, whereas the reduction in rainfall contribution from cM results from the removal of vertical wind shear. When upward motions appear throughout the troposphere on 16 July, the exclusion of all these effects increases rainfall contribution from CM, but generally decreases rainfall contributions from Cm and cM.

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