dust event
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2021 ◽  
Vol 14 (1) ◽  
pp. 118
Author(s):  
Qiaojun Liu ◽  
Andrew Yuksun Cheng ◽  
Jianhua Zhu ◽  
Sauwa Chang ◽  
Kinseng Tam

Vertical profiles of particulates were measured in Macao by using a 355 nm Mie scattering lidar during a dust event. A high energy pulse laser was employed as the light source to detect the extinction coefficient in the atmosphere. The extinction profiles showed layers of high aerosol concentrations in good agreement with both back trajectory analysis and ground-based pollution measurements in Macao, which indicate that this lidar is very useful for monitoring extinction profiles during extreme high aerosol loading and low visibility atmospheric conditions when most low energy lidar system is inefficient. The results evidenced that correlations between PM2.5 and TSP varied with the intensity of dust storm and the PM2.5/PM10 ratio was small during dust episode, which indicated that aerosols were dominated by large particles. Furthermore, results of the dust event showed high aerosol concentrations at altitudes where the wind carried the dusty aerosols from northern China, covering Shanghai and the Taiwan Channel, to the Pearl River Delta Region. This research improved the understanding of the dust properties in Macao.


Author(s):  
Gesa K. Eirund ◽  
Saskia D. Dusseldorp ◽  
Benjamin T. Brem ◽  
Zane Dedekind ◽  
Yves Karrer ◽  
...  

MAUSAM ◽  
2021 ◽  
Vol 69 (2) ◽  
pp. 227-242
Author(s):  
V. K. SONI ◽  
SANJAY BIST ◽  
R. BHATLA ◽  
S. C. BHAN ◽  
GAJENDRA KUMAR ◽  
...  

MAUSAM ◽  
2021 ◽  
Vol 72 (4) ◽  
pp. 803-812
Author(s):  
ADITI ADITI ◽  
RAGHAVENDRA ASHRIT

Dust storms are common over north-west parts of India during the pre-monsoon season. The main objective of this study is to assess the movement of dust over Indian region during a dust event using the dust aerosol optical depth (AOD) forecast from an operational numerical weather prediction model. Observed values of visibility, wind speed are used to identify the dust events over a point location. In addition, satellite observations for the days prior to, during and after dust events are utilized to ascertain the dust event. The performance of operational NCMRWF Unified Model (NCUM) is analyzed in predicting the values of dust AOD during dust events over north west parts of India. Predicted values of dust AOD are compared with observations available from satellite and ground based network of Aerosol Observation Network (Aeronet).                 The dust event of 25th May, 2016 observed at Jaipur and Lucknow is well captured by NCUM up to Day-3 forecast. The comparison of predicted dust AOD at point locations Jaipur and Kanpur reveals that NCUM is capable in predicting the high values of AODs during dust event.


Chemosphere ◽  
2021 ◽  
Vol 279 ◽  
pp. 130533
Author(s):  
Sajjad Abbasi ◽  
Mahrooz Rezaei ◽  
Behnam Keshavarzi ◽  
Monireh Mina ◽  
Coen Ritsema ◽  
...  

2021 ◽  
Vol 48 (11) ◽  
Author(s):  
Akiho Miyamoto ◽  
Hiromu Nakagawa ◽  
Takeshi Kuroda ◽  
Kosuke Takami ◽  
Isao Murata ◽  
...  

Author(s):  
Davender Sethi ◽  
S. R. Radhakrishnan ◽  
Chhemendra Sharma ◽  
S. K. Mishra ◽  
Jaswant

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