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A -- INVESTIGATIONS TO ADDRESS THE RADIATIVE IMPACT OF AEROSOLS ON THE EARTH'S CLIMATE SOL NRA-97-MTPE-16 DUE 022498 POC Robert J. Curran, Senior Scientist, Phone (202) 358-1432, Fax (202) 358-2770, Email rcurran@mail.hq.nasa.gov WEB: Click here for the latest information about this notice, http://procurement.nasa.gov/EPS/HQ/date.html#NRA-97-MTPE-16. E-MAIL: Robert J. Curran, rcurran@mail.hq.nasa.gov. INVESTIGATIONS TO ADDRESS THE RADIATIVE IMPACT OF AEROSOLS ON THE EARTH'S CLIMATE POC Dr. Robert J. Curran, NASA Code YS Phone (202) 358-1432 NRA-97-MTPE-16 Solicitation release date December 24, 1997 Proposals due February 24, 1998 The NRA will be posted in full on the release date of December 24, 1997. The National Aeronautics and Space Administration (NASA) announces the solicitation for proposals for scientific studies focused on developing an understanding of aerosol radiative forcing of climate. Proposals are sought leading to quantitative assessment of radiative forcing caused by atmospheric aerosols during the 20 year period of satellite observations. Atmospheric aerosols, or fine particles, appear to play an important role in global climate change. Natural variations of aerosols are recognized as a significant climate forcing, that is, a factor that alters the planetary radiation balance and thus may cause a global temperature change. In addition, there are several ways in which human activities are altering the amount and geographic distribution of atmospheric aerosols, and thus possibly affecting climate. This NRA is concerned with the climate forcing due to changing aerosol concentration and properties, both the direct radiative forcing by aerosols and the indirect radiative forcing caused by effects of changing aerosols on cloud properties. The principal investigators of these studies will be invited to participate on a science team to coordinate their research plans, share information and guide development of an aerosol climatology. Participation in this NRA is open to all institutions eligible to receive support from NASA. This solicitation will be available electronically on the release date via the Internet at the Mission to Planet Earth Home Page: "http://www.hq.nasa.gov/office/mtpe/" under "MTPE Research Announcements" or via anonymous ftp at: ftp.hq.nasa.gov/pub/mtpe. Paper copies of the announcement will be available to those who do not have access to Internet by calling (202) 358-3552and leaving a voice-mail message. Please leave your full name and address, including zip code, and your telephone number, including area code. This announcement will be open for the period from December 24, 1997, through February 24, 1998, and proposals may be submitted to NASA at any time throughout that period. Letters of intent are requested to be submitted before January 23, 1998. (0337)

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