Cloud Water and Filter Pack Concentrations from the Summit of Whireface Mountain, NY

Selma Isil1 and Paul Casson2

The Clean Air Status and Trends Network (CASTNET) began operation in 1991, as an expansion of the National Dry Deposition Network, and was established in response to the 1990 Clean Air Act Amendments (CAAA). CASTNET’s principal function is to provide air pollutant concentration data to evaluate the effectiveness of national and regional emission control programs. The program was designed to determine trends in rural atmospheric ozone, nitrogen and sulfur concentrations and deposition fluxes of nitrogen and sulfur pollutants. CASTNET is sponsored mainly by the U.S Environmental Protection Agency (EPA) and the National Park Service (NPS).

The Mountain Acid Deposition Program (MADPRO) was initiated in 1993 as part of the research necessary to support CASTNET’s objectives. MADPRO focused on developing cloud water measurement systems to be used in a network monitoring environment and to update the cloud water concentration and deposition data collected during the Mountain Cloud Chemistry Program (MCCP). Measurements were conducted from 1994 through 1999 during the warm season (May through October) at three mountaintop sampling stations, one of which is located at Whiteface Mountain, NY. In 2001, the Adirondack Lakes Survey Corporation (ALSC), with support from the Department of Environmental Conservation (DEC) took over the field and laboratory operations at this site. Of the three original MADPRO sites, the Whiteface Mountain site is the only site that is still operational.

This poster will present results from CASTNET site WFM007 and the ALSC cloud water site WFM300 as well as trace gas measurements. Both sites are located on the Atmospheric Sciences Research Center’s Summit Observatory which is located on the peak of the mountain at an elevation of 1483 m. CASTNET operates another site, WFM105, at the Marble Mountain Lodge site located on the eastern shoulder of the Whiteface massif at an elevation of 604 m. This site also houses a National Atmospheric Deposition Program/National Trends Network (NADP/NTN) site, NY98, for collection and analysis of weekly precipitation samples. Data from WFM105 and NY98 will also be presented and, where possible, compared with concentrations from the summit sites.


1Amec Foster Wheeler, Inc.,
2Atmospheric Sciences Research Center, 110 Marble Mountain Lane, Wilmington, NY 12997,