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东南亚生物质燃烧对我国霾和降水的影响
王继康
(国家气象中心)
Effects of Biomass Burning Aerosol in Southeast Asia on Haze and Precipitation over China
Wang Jikang
(National meteorological Center,Beijing,100081)
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投稿时间:2020-10-14    修订日期:2021-01-05
中文摘要: 本文基于生物质燃烧排放清单、地面观测和数值模式对东南亚中南半岛生物质燃烧气溶胶的排放特征、及其在2020年春季对我国云南地区霾天气和南方前汛期降水过程的影响进行了分析。结果表明:中南半岛生物质燃烧气溶胶排放主要集中于每年3至4月,排放峰值时段集中于3月下旬至4月上旬,主要排放区域为缅甸东部和老挝北部。中南半岛生物质燃烧气溶胶在地面主要影响我国云南南部城市的霾天气,缅甸的生物质燃烧气溶胶是最主要的贡献源。中南半岛生物质燃烧气溶胶在低空西南急流作用下,可以在800hpa-600hPa高度传输至我国华南和江南南部大部分区域的上空。传输至我国南方上空的生物质燃烧气溶胶通过抑制对流性降水、增强非对流性降水,可以改南方前汛期降水过程的空间分,使降水更集中于切变线附近。
Abstract:A fire inventory, surface monitoring data and numerical models were used to analyze the biomass burning aerosol (BBA) emissions in Indochina peninsula and their effects on haze in Southwest China and pre-monsoon precipitation in South China. The BBA emissions in Indochina peninsula mainly occurred in March and April each year, and the peak emissions were in late March to early April. Eastern Myanmar and Northern Laos dominated the BBA emissions. The BBA in Indochina Peninsula mainly affected the haze in the southern cities of Yunnan, China at the surface. The emissions from Myanmar were the most significant contributor to the pollution in these cities. The BBA in Indochina Peninsula could be transported over most parts of Southern China by the low-level southwest rapids at the height from 800 hPa to 600 hPa. The transported BBA over Southern China could alter the spatial fraction of the pre-monsoon precipitation process by suppressing the convective precipitation and enhancing the non-convective precipitation, and then precipitation was more concentrated near the shear line.
文章编号:202010140355     中图分类号:    文献标志码:
基金项目:中国气象局预报员专项(CMAYBY2020-160),自然科学基金(41875181)和国家重点研发计划(2019YFC0214602)资助
引用文本:
王继康,0.Effects of Biomass Burning Aerosol in Southeast Asia on Haze and Precipitation over China[J].Meteor Mon,():-.
Wang Jikang,0.Effects of Biomass Burning Aerosol in Southeast Asia on Haze and Precipitation over China[J].Meteor Mon,():-.