Next Article in Journal
Influence of ENSO on Regional Indian Summer Monsoon Precipitation—Local Atmospheric Influences or Remote Influence from Pacific
Next Article in Special Issue
Characterization of Fine Particulate Matter Emitted from the Resuspension of Road and Pavement Dust in the Metropolitan Area of São Paulo, Brazil
Previous Article in Journal
The Application of TAPM for Site Specific Wind Energy Forecasting
Previous Article in Special Issue
Windblown Dust Deposition Forecasting and Spread of Contamination around Mine Tailings
Open AccessArticle

Decreasing Aerosol Loading in the North American Monsoon Region

Department of Hydrology and Atmospheric Sciences, Tucson, AZ 85721, USA
Department of Chemical and Environmental Engineering, Tucson, AZ 85721, USA
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Atmosphere 2016, 7(2), 24;
Received: 8 December 2015 / Revised: 16 January 2016 / Accepted: 26 January 2016 / Published: 5 February 2016
(This article belongs to the Special Issue Atmospheric Composition Observations)
We examine the spatio-temporal variability of aerosol loading in the recent decade (2005–2014) over the North American Monsoon (NAM) region. Emerging patterns are characterized using aerosol optical depth (AOD) retrievals from the NASA Terra/Moderate Resolution Imaging Spectroradiometer (MODIS) instrument along with a suite of satellite retrievals of atmospheric and land-surface properties. We selected 20 aerosol hotspots and classified them into fire, anthropogenic, dust, and NAM alley clusters based on the dominant driver influencing aerosol variability. We then analyzed multivariate statistics of associated anomalies during pre-, monsoon, and post-monsoon periods. Our results show a decrease in aerosol loading for the entire NAM region, confirming previous reports of a declining AOD trend over the continental United States. This is evident during pre-monsoon and monsoon for fire and anthropogenic clusters, which are associated with a decrease in the lower and upper quartile of fire counts and carbon monoxide, respectively. The overall pattern is obfuscated in the NAM alley, especially during monsoon and post-monsoon seasons. While the NAM alley is mostly affected by monsoon precipitation, the frequent occurrence of dust storms in the area modulates this trend. We find that aerosol loading in the dust cluster is associated with observed vegetation index and has only slightly decreased in the recent decade. View Full-Text
Keywords: aerosol variations; southwest US; multi-satellite analysis; North American monsoon aerosol variations; southwest US; multi-satellite analysis; North American monsoon
Show Figures

Graphical abstract

MDPI and ACS Style

Raman, A.; Arellano, A.F.; Sorooshian, A. Decreasing Aerosol Loading in the North American Monsoon Region. Atmosphere 2016, 7, 24.

AMA Style

Raman A, Arellano AF, Sorooshian A. Decreasing Aerosol Loading in the North American Monsoon Region. Atmosphere. 2016; 7(2):24.

Chicago/Turabian Style

Raman, Aishwarya; Arellano, Avelino F.; Sorooshian, Armin. 2016. "Decreasing Aerosol Loading in the North American Monsoon Region" Atmosphere 7, no. 2: 24.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop