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Author Guo, Jianping ♦ Niu, Tao ♦ Wang, Fu ♦ Deng, Minjun ♦ Wang, Yaqiang
Source SpringerLink
Content type Text
Publisher Springer Berlin Heidelberg
File Format PDF
Copyright Year ©2013
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Earth sciences
Subject Keyword PM$_{10}$ ♦ dust ♦ AOD ♦ MODIS ♦ CALIOP ♦ Atmospheric Sciences ♦ Meteorology ♦ Geophysics and Environmental Physics ♦ Atmospheric Protection/Air Quality Control/Air Pollution
Abstract The aerosol optical depth (AOD) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard Satellite Aqua, along with the altitude-resolved aerosol subtypes product from the Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP), as well as surface PM$_{10}$ measurements, were utilized to investigate the dust activities common in springtime of northern China. Specifically, a dust storm episode that occurred over the North China Plain (NCP) during 17–21 March 2010 was identified. The PM$_{10}$ concentration at Beijing (39.8°N, 116.47°E) reached the peak value of 283 µg m$^{−3}$ on 20 March 2010 from the background value of 15 µg m$^{−3}$ measured on 17 March 2010, then dropped to 176 µg m$^{−3}$ on 21 March 2010. Analysis of the CALIOP aerosol subtypes product showed that numerous large dust plumes floated over northern China, downwind of main desert source regions, and were lifted to altitudes as high as 3.5 km during this time period.The MODIS AOD data provided spatial distributions of dust load, broadly consistent with ground-level PM$_{10}$, especially in cloud free areas. However, inconsistency between the MODIS AOD and surface PM$_{10}$ measurements under cloudy conditions did exist, further highlighting the unique capability of the CALIOP lidar. CALIOP can penetrate the cloud layer to give unambiguous and altitude-resolved dust measurements, albeit a relatively long revisit period (16 days) and narrower swath (90 m). A back trajectory simulation using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model was performed, and it was found that the sand-dust storm originated from the Gobi Desert on 18 March 2010 travelled approximately 1200–1500 km day$^{−1}$ eastward and passed over the NCP on 19 March 2010, in good agreement with previous findings. In addition, the multi-sensor measurements integrated with the HYSPLIT model output formed a three-dimensional view of the transport pathway for this dust episode, indicating that this episode was largely associated with the desert source regions to the northwest of the NCP. The results imply the importance of integration of multi-sensor measurements for clarifying the overall structure of dust events over northern China.
ISSN 08940525
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2013-08-17
Publisher Place Berlin, Heidelberg
e-ISSN 21914788
Journal Journal of Meteorological Research
Volume Number 27
Issue Number 4
Page Count 11
Starting Page 566
Ending Page 576

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Source: SpringerLink