| Year of Publication | 2010 | Division | Asian Dust Research Division |
|---|---|---|---|
| Title | The Features of Asian Dust Events Originated in Manchuria | ||
| Author | Kim Sumin | ||
| Coauthor | Youngsin Chun, Seung-Bum Kim | ||
| ISBN(ISSN) | Name of Journal | Korean Meteorological Society | |
| Category (International/Domestic) | 국내 | Vol. No. | 20(3) |
| Research Project Title | 황사감시예측기술 지원 및 활용연구 (2010년) | Publication Date | 2010-01-01 |
| Keywords | Hwangsa, dust occurrence, PM10 concentration, keoeolchin sandy land, keerqin desert | ||
The northeast part of China(hereafter Manchuria) is one of Asian dust source regions
along with Gobi, Inner Mongolia and Loess Plateau. In this study, a geographical survey over
the area was carried out to determine its soil characteristics in June 2009. It revealed that some
parts of the area, especially near Keerchin desert, consist of alkali clay soil mixed up with sand.
Manchuria, where is a vast cornfield, can be a potential source region of Asian dust from fall to
following spring after harvesting. The frequency of Asian dust over the region from 1996 to
2009 was examined using 3-hourly GTS SYNOP data and it showed that the occurrence of Asian
dust over the region is high in the springtime. It was also revealed that snow cover is the key
parameter affecting on the frequency through the analysis of NCEP reanalysis data. To scrutinize
the path and structure of Asian dust from Manchuria, the event on 3~4 April 2008 and 25 January
2010 were intensively investigated with regard to features of synoptic weather patterns, satellite
imagery, airstream, naked eye-observations, concentrations of PM10, 2.5 and 1.0. For this case,
the Asian dust from the area reached to Korea less than a day. However, the duration time of the
dust in Korea was short (< 7 hours). The average of hourly PM10 reached up to 340 μg/m3 at
Baengnyeondo during the period. The high PM2.5 and PM1.0 concentrations were also observed
