2017年1月沈阳和松辽平原地区重污染过程气象条件影响机理分析

doi:10.3969/j.issn.1673-503X.2018.06.014

气象与环境学报 ›› 2018, Vol. 34 ›› Issue (6): 116-124.doi: 10.3969/j.issn.1673-503X.2018.06.014

2017年1月沈阳和松辽平原地区重污染过程气象条件影响机理分析

杨元琴, 王继志, 张小曳, 车慧正, 仲峻霆

中国气象科学研究院大气成分研究所, 北京 100081

收稿日期:2017-07-01 修回日期:2017-11-29 出版日期:2018-12-31 发布日期:2018-12-31
通讯作者: 王继志,E-mail:jzwang@cma.gov.cn。 E-mail:jzwang@cma.gov.cn
作者简介:杨元琴,女,1952年生,研究员,主要从事大气环境与空气污染、天气与气候等研究,E-mail;yangyq@cma.gov.cn。
基金资助:
国家重点研发计划（2016YFA0601901）、科技部大气污染专项项目（2016YFC0203306）和国家重点基础研究发展计划（973计划）项目（2014CB441201）共同资助。

Influence mechanism of meteorological conditions on a heavy pollution event in Shenyang and the Songliao Plain during January 2017

YANG Yuan-qin, WANG Ji-zhi, ZHANG Xiao-ye, CHE Hui-zheng, ZHONG Jun-ting

Atmospheric Composition Observing & Service Center, Chinese Academy of Meteorological Sciences, Beijing 100081, China

Received:2017-07-01 Revised:2017-11-29 Online:2018-12-31 Published:2018-12-31

摘要/Abstract

摘要： 利用国家气象信息中心的地面和高空探测资料、自动气象站（Automatic Weather Station，AWS）观测资料及大气成分站监测资料等，研究污染气象条件即影响空气质量的气象条件参数（Parameters Linking Air-quality to Meteorological Conditions，PLAM）指数对气溶胶污染贡献的诊断和预测，探讨2017年1月沈阳和松辽平原地区一次罕见的空气重污染过程中大气垂直结构及其对污染气溶胶浓度累积增长的影响，研究沈阳地区空气重污染天气形成的气象条件影响机理。结果表明：本文定义的污染混合层高度（Height of Pollution Mixing layer，H_PML）对空气污染的分析诊断具有显著的指示意义，污染混合层高度H_PML的降低有利于PM_2.5浓度累积升高，反之亦然；本文基于PLAM指数，通过大气等熵（等θ_e）过程分析计算揭示的大气层结对垂直扩散的抑制，反馈影响使污染混合层高度进一步降低；本文研究的污染输送气象条件指数（PLAM_→沈阳）揭示了沈阳周边地区的双向污染输送带，对沈阳等地空气污染有显著的叠加影响，是导致沈阳地区空气污染加重和持续的重要原因。

关键词: 双向污染输送带, 污染混合层高度, 反馈机制, 重污染机理

Abstract: Based on the surface observational data,sounding data,monitoring data from automatic weather stations (AWS) and atmospheric constituent stations,an indicator that was established using parameters linking air-quality to meteorological condition (PLAM) was used to diagnose and predict the contribution of polluted meteorological conditions to aerosol pollution.An extremely heavy polluted event rarely occurred in Shenyang and the Songliao Plain in January 2017.The vertical structure of atmosphere as well as its effect on the increase in aerosol concentration, was studied in this polluted event,in order to investigate the influence mechanism of meteorological conditions on the formation of heavy air pollution in Shenyang.An index of the height of pollution mixing layer (H_PML) is defined in this study,which has significant meaning for the analysis and diagnoses of air pollution.The decrease in H_PML value favors the accumulation and increase in PM_2.5 concentration and vice versa.Based on the PLAM indicator and through the analysis of the atmospheric isentropic process,it is revealed that the atmospheric stratification can suppress the vertical dispersion and the H_PML value continues to decrease due to the feedback effect.The two-way belt of pollutant transport exists in the surrounding regions of Shenyang according to the indicator PLAM→_Shenyang,resulting in an obvious overlying effect on the air pollution in Shenyang,which is the crucial reason of this persistent and heavy pollution event.

Key words: Two-way pollutant transport belt, Height of pollution mixing layer, Feedback mechanism, Heavy pollution mechanism

中图分类号:

X513

杨元琴, 王继志, 张小曳, 车慧正, 仲峻霆. 2017年1月沈阳和松辽平原地区重污染过程气象条件影响机理分析[J]. 气象与环境学报, 2018, 34(6): 116-124.

YANG Yuan-qin, WANG Ji-zhi, ZHANG Xiao-ye, CHE Hui-zheng, ZHONG Jun-ting. Influence mechanism of meteorological conditions on a heavy pollution event in Shenyang and the Songliao Plain during January 2017[J]. Journal of Meteorology and Environment, 2018, 34(6): 116-124.

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2017年1月沈阳和松辽平原地区重污染过程气象条件影响机理分析

Influence mechanism of meteorological conditions on a heavy pollution event in Shenyang and the Songliao Plain during January 2017

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