U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

F -- VEGETATION AND CLIMATE CHANGE NUMERICAL ANALYSES DUE 082600 POC Marilyn Hutchison, Purchasing Agent, 303-236-5900, x327, or FAX 303-236-2710 E-MAIL: USGS, CR, Acquisition and Federal Assistance, mhutchi@usgs.gov. Concerns having the ability to furnish the services described herein are requested to give written notification (including the telephone number for a point of contact) to the procuring office above within 45 calendar days from the date of this synopsis. The U. S. Geological Survey (USGS), Earth Surface Process Team, is investigating the estimated regional shifts in vegetation that have occurred under past climatic conditions or which may occur under estimated future climatic conditions. The objective is to provide data on the potential scope of the environmental effects of climate changes in terms that are accessible to land mangers, policy makers, and others who manage resources or estimate future hazards. As part of this on-going research, the USGS has a requirement for development of models to explore the interactions between vegetation and climate. Numerical vegetation models will be used to: 1) Simulate vegetation distributions based on modem vegetation-climate relationships; and 2) Simulate the response and sensitivity of vegetation to future changes in climate and land use. These models will allow the USGS to explore the role of climate variability and changes in land use on vegetation distributions through time. Equilibrium biogeography models (e.g., BIOME4) and dynamic biogeochemical models (e.g., LPJ) will be used to simulate both observed vegetation patterns, and vegetation response to future climate change using GCM climate scenarios. Accurate calculations of seasonal soil moisture variability are needed in order to correctly simulate vegetation. Unique numerical analysis capabilities, software, visualization tools, and experience for the analysis and illustration of BIOMES and water balance models are required, as follows: 1) Use and implementation of the BIOME4 model; and 2) Knowledge and ability to analyze and write water balance computer code that can be used in the BIOME4 model. Based on information available at this time, and in accordance with 41 U.S.C. 253(c)(1), implemented by FAR 5.302-1, the Government considers the services specified as a sole source procurement from The University of Oregon, Office of Research Services, Eugene, Oregon, and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will be considered. Firms who feel that they can furnish the required services are invited to submit in writing an affirmative response to this announcement, and such other materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competitive opportunities exist. Since no solicitation document exists, requests for such documents without accompanying information will be considered non-responsive to this request without further consideration. This notice may represent the Government's only official notice of this procurement. See Note 22. Posted 07/12/00 (W-SN474150). (0194)

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