THE IMPACTS OF SEA-SALT AND NSS-SULFATE AEROSOLS ON CLOUD MICROPROPERTIES

Zhao Chunsheng; Peng Dayong; Duan Ying

Vol.16, NO.4, 2005

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(4): 417-425

Zhao Chunsheng, Peng Dayong, Duan Ying. The impacts of sea-salt and nss-sulfate aerosols on cloud microproperties. J Appl Meteor Sci, 2005, 16(4): 417-425.

Citation:

Zhao Chunsheng, Peng Dayong, Duan Ying. The impacts of sea-salt and nss-sulfate aerosols on cloud microproperties. J Appl Meteor Sci, 2005, 16(4): 417-425.

Zhao Chunsheng, Peng Dayong, Duan Ying. The impacts of sea-salt and nss-sulfate aerosols on cloud microproperties. J Appl Meteor Sci, 2005, 16(4): 417-425.

Citation:

Zhao Chunsheng, Peng Dayong, Duan Ying. The impacts of sea-salt and nss-sulfate aerosols on cloud microproperties. J Appl Meteor Sci, 2005, 16(4): 417-425.

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THE IMPACTS OF SEA-SALT AND NSS-SULFATE AEROSOLS ON CLOUD MICROPROPERTIES

1.
Department of Atmospheric Science, School of Physics, Peking University, Beijing 100871
2.
Weather Modi fication Of fice of Hebei Province, Shijiazhuang 050021

Received Date: 2003-11-10
Rev Recd Date: 2004-04-20
Publish Date: 2005-08-01

Abstract

Abstract

Impacts of nss-sulfate and sea-salt on marine clouds microphysical properties are investigated using a mutil-component size-resolving aerosol model. Numerical results show that the vertical distribution of liquid water content remains almost constant as sea salts number and updrafts increase. The effective radius decreases as cloud drops number increases. The number of cloud drops is dominated by nss-sulfate. Sea-salt plays a critical role in cloud microphysical processes. Due to its large radius sea-salt particles are activated into cloud drops in the initial cloud development. Sea-salt activation decreases supersaturation by consuming water vapor and suppresses nss-sulfate activation. Sea salts can enhance cloud drops number concentration under the case of large updrafts and decrease under the case of low updrafts. Nss-sulfate indirect forcing may be overestimated in some conditions (such as updraft is low) because of the presence of sea-salt particles.
- Sea-salt;
- Nss-sulfate;
- Aerosol;
- Cloud microphysics

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References(16)

Figures and Tables

图 1 由寇拉曲线计算出的不同过饱和比情况下硫酸盐粒子 (平均半径0.08 μm, 标准偏差1.4的对数正态分布) 的活化比

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图 2 硫酸盐粒子浓度分别为（a）100cm^-3, （b）300cm^-3, (c) 1000cm^-3情况，最大过饱和比随上升速度和海盐粒子浓度

（以水平风速表示，见表 1）的变化

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图 3 活化粒子总数与垂直风速和硫酸盐粒子浓度的关系

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表 1 海盐粒子浓度随水平风速的变化

表 2 云团上升速度0.5 m·s^-1时, 云顶各微物理特性随模拟初始条件的变化

表 3 云团上升速度0.2 m·s^-1, 云顶各微物理特性随模拟初始条件的变化

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