中山大学学报（自然科学版）（中英文）2023，Vol.62Issue(2)：123-136,14.DOI:10.13471/j.cnki.acta.snus.2022D010
海盐核对华南沿海一次暖区暴雨的影响
Effect of sea salt aerosols on a warm-sector heavy rainfall event over coastal Southern China
摘要
Abstract
This study used the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) version 4.1.2 to simulate a warm-sector heavy rainfall (WSHR) event that occurred over coastal Southern China in 2014. To investigate the effects of the concentration of sea salt aerosols (SSA) on the development of WSHR, different levels of SSA emission were incorporated in three separate experi-ments (CTL, LOW, and HIGH). The distribution of precipitation and hydrometeors, the microphysical processes, and the release of latent heat resulting from the rainfall in all three simulations were ana-lyzed. Results show that SSA mass concentration can affect the rainfall area: the LOW experiment shows dispersed rainfall, whereas the HIGH experiment presents concentrated rainfall. Under the situa-tion of low (high) SSA emission: the concentration of cloud condensation nuclei during rainfall de-creases (increases), the mixing ratio of rain and graupel increases (decreases), and microphysical pro-cesses, particularly the automatic conversion of cloud water into rainwater and accretion of cloud water by rain, are enhanced (weakened), more (less) latent heat is released, and the updrafts are enhanced (weakened); these result in an increase (decrease) of accumulated precipitation and rain rate.关键词
海盐核/暖区暴雨/微物理效应/WRF-Chem模式Key words
sea salt aerosols/warm-sector heavy rainfall/microphysical effects/WRF-Chem model分类
天文与地球科学引用本文复制引用
罗青,陈子健,林文实,蒋宝林,曹琪敏,李芳洲..海盐核对华南沿海一次暖区暴雨的影响[J].中山大学学报（自然科学版）（中英文）,2023,62(2):123-136,14.基金项目
Supported by National Natural Science Foundation of China(41875168) （41875168）
