Dust acid uptake analysis during long-lasting dust and pollution episodes over East Asia based on synergetic observation and chemical transport model

Itsushi Uno, Keiya Yumimoto, Kazuo Osada, Zhe Wang, Xiaole Pan, Syuichi Itahashi, Shigekazu Yamamoto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Two heavy dust storms that occurred between 24-26 May 2014 in Mongolia and Inner Mongolia, China were responsible for long-lasting dust episodes observed from 26 May to 2 June 2014 in Fukuoka, Japan. During this period, dust and anthropogenic pollutants were transported simultaneously to Fukuoka and Korea and remained there for almost 8 days. We successfully observed fine and coarse aerosol time variations (1-hour intervals) in Fukuoka. The GEOS-Chem chemical transport model, which includes dust-acid uptake processes, successfully reproduced the aerosol variations and explained the Asian-scale dust-pollutant transport and transformation processes. Model sensitivity analyses with and without dust-acid uptake processes showed that the formation of dust-nitrate occurred over the Yellow Sea and East China Sea before arriving in Japan. The model sensitivity analysis showed that less than 5% of the coarse dust-nitrate originated from NOx emissions from Japan, and large amounts of dustnitrate originated outside of Japan.

Original languageEnglish
Pages (from-to)109-113
Number of pages5
JournalScientific Online Letters on the Atmosphere
Volume13
DOIs
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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