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Trans-Pacific transport of dust aerosols from East Asia: Insights gained from multiple observations and modeling

Guo, Jianping and Lou, Mengyun and Miao, Yucong and Wang, Yuan and Zeng, Zhaoliang and Liu, Huan and He, Jing and Xu, Hui and Wang, Fu and Min, Min and Zhai, Panmao (2017) Trans-Pacific transport of dust aerosols from East Asia: Insights gained from multiple observations and modeling. Environmental Pollution, 230 . pp. 1030-1039. ISSN 0269-7491. http://resolver.caltech.edu/CaltechAUTHORS:20170728-130728616

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Abstract

East Asia is one of the world's largest sources of dust and anthropogenic pollution. Dust particles originating from East Asia have been recognized to travel across the Pacific to North America and beyond, thereby affecting the radiation incident on the surface as well as clouds aloft in the atmosphere. In this study, integrated analyses are performed focusing on one trans-Pacific dust episode during 12–22 March 2015, based on space-borne, ground-based observations, reanalysis data combined with Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT), and the Weather Research and Forecasting Model coupled with Chemistry (WRF-Chem). From the perspective of synoptic patterns, the location and strength of Aleutian low pressure system largely determined the eastward transport of dust plumes towards western North America. Multi-sensor satellite observations reveal that dust aerosols in this episode originated from the Taklimakan and Gobi Deserts. Moreover, the satellite observations suggest that the dust particles can be transformed to polluted particles over the East Asian regions after encountering high concentration of anthropogenic pollutants. In terms of the vertical distribution of polluted dust particles, at the very beginning, they were mainly located in the altitudes ranging from 1 km to 7 km over the source region, then ascended to 2 km–9 km over the Pacific Ocean. The simulations confirm that these elevated dust particles in the lower free troposphere were largely transported along the prevailing westerly jet stream. Overall, observations and modeling demonstrate how a typical springtime dust episode develops and how the dust particles travel over the North Pacific Ocean all the way to North America.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.envpol.2017.07.062DOIArticle
http://www.sciencedirect.com/science/article/pii/S0269749117330324PublisherArticle
Additional Information:© 2017 Elsevier Ltd. Received 27 February 2017, Revised 3 July 2017, Accepted 19 July 2017, Available online 27 July 2017.
Subject Keywords:Dust; CALIPSO; Pacific; Transport; WRF-Chem; PM10; Wet deposition
Record Number:CaltechAUTHORS:20170728-130728616
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170728-130728616
Official Citation:Jianping Guo, Mengyun Lou, Yucong Miao, Yuan Wang, Zhaoliang Zeng, Huan Liu, Jing He, Hui Xu, Fu Wang, Min Min, Panmao Zhai, Trans-Pacific transport of dust aerosols from East Asia: Insights gained from multiple observations and modeling, Environmental Pollution, Volume 230, November 2017, Pages 1030-1039, ISSN 0269-7491, https://doi.org/10.1016/j.envpol.2017.07.062. (http://www.sciencedirect.com/science/article/pii/S0269749117330324)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79543
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Jul 2017 23:08
Last Modified:28 Jul 2017 23:08

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