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Investigators and Program Directors

Liaquat Husain

Liaquat Husain

Research Scientist, Wadsworth Center, Environmental Atmospheric Chemistry
Professor, School of Public Health, Environmental Health Sciences

Ph.D. Nuclear Chemistry, University of Arkansas, 1968
Postdoctoral Training, Brookhaven National Laboratory

E-mail: husain@wadsworth.org

Research Interests

My research is focused on the studies of emissions, chemical transformation, and atmospheric transport of trace elements, sulfur dioxide, elemental and organic carbon, and their fates in the atmosphere. These studies have important implications in the assessment of acid rain, air quality, and long-term changes in earth's climate. Major conclusions have been: (1) measurements of sulfate concentrations in aerosols at two locations 530 km apart in New York State over a quarter century have established that a quantitative relationship exists between the regional sulfur dioxide emissions in the Midwestern US and sulfate concentrations in the northeastern US. Therefore, a reduction in the emissions in the Midwest would result in a proportional decrease in acid deposition in the northeastern US; (2) like sulfate, concentrations of trace elements over two decades have also decreased over the past two decades. Apparently, the regulations restricting sulfur dioxide and particulate emissions have resulted in decreases in the Adirondacks of 16% per year for mercury, 14% for lead, 3 to 5% for K, Mn, Sc, and Fe.

Thus, regulations under the Clean Air Act have resulted in not only decreases in acid rain causing sulfate aerosols but also improvement in air quality due to reduction in the atmospheric burden of toxic metals. Our current work is focused on determining atmospheric burden of elemental or black carbon (EC) over the last ~150 years and using the data to (1) estimate the effect of EC on the amount of radiation received by the earth, and associated changes in the earth's temperature, cloud cover, and climate.

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Contact Information

Phone: 518-473-4854
FAX: 518-473-2895
E-mail: husain@wadsworth.org