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Study on the Asian dust emitted from the hotspot in the Gobi Desert

Authors :
Kai Kenji
Kawai Kei
Jin Yoshitaka
Shimizu Atsushi
Sugimoto Nobuo
Maki Teruya
Noda Jun
Shiina Tatsuo
Davaanyam Enkhbaatar
Batdorj Dashdondog
Source :
E3S Web of Conferences, Vol 575, p 01002 (2024)
Publication Year :
2024
Publisher :
EDP Sciences, 2024.

Abstract

We have studied the Asian dust emitted from a hotspot in the Gobi Desert by a lidar network, analyses of Himawari-8 Dust RGB and meteorological fields, and a field survey since 2013. We found a remarkable dust hotspot in the Gobi Desert by the filed survey and analysis. The Himawari-8 Dust RGB imagery shows that the dust storm occurred in an orographic convergence zone sandwiched between the Khangai, Altai, and Gurvan Saikhan Mountains in the Gobi Desert. The lidar network operating in Dalanzadgad, Sainshand, and Zamyn-Uud, Mongolia shows a dust layer development over the Gobi Desert in association with a cold frontal system and the long-range transport of the dust. We estimated the massextinction conversion factor MECF (g m-2) from simultaneous observations using an optical particle counter (OPC) installed on a tethered balloon and a ceilometer in the Gobi Desert. The MECF values decreased from the Asian dust source (Dalanzadgad 1.91 g m-2) to the lee-side areas (e.g., Tsukuba 1.18 g m-2) due to the gravitational settling of large dust particles.

Subjects

Subjects :
Environmental sciences
GE1-350

Details

Language :
English, French
ISSN :
22671242 and 20245750
Volume :
575
Database :
Directory of Open Access Journals
Journal :
E3S Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.5c3464928bc40bf88730a69f53ac24f
Document Type :
article
Full Text :
https://doi.org/10.1051/e3sconf/202457501002