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High-altitude and long-range transport of aerosols causing regional severe haze during extreme dust storms explains why afforestation does not prevent storms

Guo, Ping and Yu, Shaocai and Wang, Liqiang and Li, Pengfei and Li, Zhen and Mehmood, Khalid and Chen, Xue and Liu, Weiping and Zhu, Yannian and Yu, Xing and Alapaty, Kiran and Lichtfouse, Eric and Rosenfeld, Daniel and Seinfeld, John H. (2019) High-altitude and long-range transport of aerosols causing regional severe haze during extreme dust storms explains why afforestation does not prevent storms. Environmental Chemistry Letters, 17 (3). pp. 1333-1340. ISSN 1610-3653. https://resolver.caltech.edu/CaltechAUTHORS:20190315-131932192

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Abstract

Climate change is predicted to induce more extreme events such as storms, heat waves, drought and floods. Dust storms are frequently occurring in northern China. Those storms degrade air quality by decreasing visibility and inducing cardiovascular and respiratory diseases. To control dust storms, the Chinese government has launched a large-scale afforestation program by planting trees in arid areas, but the effectiveness of this program is still uncertain because the trajectories and altitudes of dust transport are poorly known. In particular, afforestation would be effective only if dust transport occurs at low altitudes. To test this hypothesis, we analyzed the extreme dust storm from May 2 to 7, 2017, which resulted in record-breaking dust loads over northern China. For that, we used dust RGB-composite data from the Himawari-8 satellite and the cloud-aerosol lidar, moderate-resolution imaging spectroradiometer data, and surface monitoring data. The source regions of the dust storms were identified using the hybrid single-particle Lagrangian integrated trajectory model and infrared pathfinder satellite observation. Contrary to our hypothesis, results show that dust is transported at high altitude of 1.0–6.5 km over long distances from northwestern China. This finding explains why the afforestation has not been effective to prevent this storm. Results also disclose the highest particulate matter (PM) concentrations of 447.3 μg/m^3 for PM_(2.5) and 1842.0 μg/m^3 for PM_(10) during the dust storm. Those levels highly exceed Chinese ambient air quality standards of 75 μg/m^3 for PM_(2.5) and 150 μg/m^3 for PM_(10).


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/s10311-019-00858-0DOIArticle
https://rdcu.be/byNKDPublisherFree ReadCube access
ORCID:
AuthorORCID
Yu, Shaocai0000-0001-9718-8246
Liu, Weiping0000-0002-1173-892X
Zhu, Yannian0000-0002-8371-1830
Lichtfouse, Eric0000-0002-8535-8073
Rosenfeld, Daniel0000-0002-0784-7656
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2019 Springer Nature Switzerland AG. Received: 14 October 2018; Accepted: 19 January 2019. First Online: 14 March 2019. This work was partially supported by the Department of Science and Technology of China (Nos. 2016YFC0202702; 2014BAC22B06) and National Natural Science Foundation of China (No. 21577126). This work was also supported by the Joint NSFC–ISF Research Program (No. 41561144004), jointly funded by the National Natural Science Foundation of China and the Israel Science Foundation. Part of this work was also supported by the “Zhejiang 1000 Talent Plan” and Research Center for Air Pollution and Health in Zhejiang University. The views expressed in this presentation are those of the author(s) and do not necessarily represent those of the US EPA.
Funders:
Funding AgencyGrant Number
Department of Science and Technology (China)2016YFC0202702
Department of Science and Technology (China)2014BAC22B06
National Natural Science Foundation of China21577126
National Natural Science Foundation of China41561144004
Israel Science FoundationUNSPECIFIED
Zhejiang 1000 Talent PlanUNSPECIFIED
Zhejiang UniversityUNSPECIFIED
Subject Keywords:Regional severe haze; Massive dust storm; Satellite observation; Optical properties
Issue or Number:3
Record Number:CaltechAUTHORS:20190315-131932192
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190315-131932192
Official Citation:Guo, P., Yu, S., Wang, L. et al. Environ Chem Lett (2019) 17: 1333. https://doi.org/10.1007/s10311-019-00858-0
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93870
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Mar 2019 20:34
Last Modified:03 Oct 2019 20:58

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