FILE NAME: TEM00-panarctic.doc YEARS: 1920-2100 PI: A. Dave McGuire OTHERS: Joy Clein MANUSCRIPT TITLE: Modeling carbon responses of tundra ecosystems to historical and projected climate: sensitivity of Pan-arctic carbon storage to temporal and spatial variation in climate BRIEF DESCRIPTION: This data set contains the model output data of TEM simulations from 1920-2100 for both moist tundra and polar desert/alpine tundra for the Pan-arctic compared to output for the Kuparuk River Basin (moist tundra). RESEARCH LOCATION: The Pan-arctic includes all land area north of 50 degrees North. The Kuparuk River Basin consists of the 9200 km2 Kuparuk River watershed located on the North Slope of Alaska. The Kuparuk watershed extends from the Brooks Range, north through the foothills and coastal wet tundra to the Arctic Ocean. METHODS: TEM simulates C and N fluxes and pools at a 0.5 x 0.5 degree spatial scale. There were 5942 grid cells used in the pan-arctic simulation of which 3614 were considered polar desert/alpine tundra and 2328 were considered moist tundra. All 19 grid cells in the Kuparuk simulation were considered moist tundra. The values of several ecosystem variables are compared between the Pan-arctic and Kuparuk and are presented here. These results are presented and discussed in McGuire, et al. (2000). These simulations use the moist tundra and polar desert/alpine tundra calibrations developed by McGuire et al. (1992) based on data from Toolik Lake, Alaska. MODEL NAME: TEM, version 41e as described in McGuire et al. (1999) with modifications as described in McGuire et al. (2000). MODEL INPUT: TEM requires 7 driver or input variables. These are atmospheric CO2, temperature, precipitation, mean monthly cloudiness, vegetation, elevation and soil texture as percent sand, silt and clay. Values for each of these drivers were used from various global data sets, ie: CO2 (1920-1994; Enting et al 1994, 1995-2100; Hadley CM2 simulation), temperature and precipitation (1920-1994; Legates & Wilmott 1990a, 1990, with the anomalies of Jones 1994 and Hulme 1995, 1995-2100; monthly ramps from a Hadley Center CM2 simulation), vegetation (either polar desert or moist tundra), elevation (NCAR/Navy 1984), soil texture (FAO-UNESCO 1971), cloudiness (Leamans & Cramer 1991). For more detailed information see McGuire et al. 2000. CONDITIONS FOR USE: Acceptance and utilization of this data requires that: The Principal Investigator is sent a notice stating reasons for acquiring any data and a description of the publication intentions. The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications. A copy of any resultant publications should be sent to: A Dave McGuire 216 Irving I Building University of Alaska Fairbanks Fairbanks, AK 99775 VARIABLE DESCRIPTION: Variable name Variable description Units ----------------------------------------------------------------------------------------------------------------------------------------------------- NPP Net Primary Production g C m-2 yr-1 RH Heterotrophic Respiration g C m-2 yr-1 NEP Net Ecosystem Production g C m-2 yr-1 NMIN Net Nitrogen Mineralization g N m-2 y-1 FOR MORE INFORMATION, CONTACT: A Dave McGuire 216 Irving I Building, University of Alaska Fairbanks Fairbanks, AK 99775 Email: ffadm@uaf.edu OTHER DATA FILES TO REFERENCE: TEM00-NPP.dat, TEM00-RH.dat, TEM00-NMIN.dat, TEM00-NEP.dat FILES: File Name: TEM00-NPP.dat File Type: Comma-delimited ASCII File Name: TEM00-RH.dat File Type: Comma-delimited ASCII File Name: TEM00-NMIN.dat File Type: Comma-delimited ASCII File Name: TEM00-NEP.dat File Type: Comma-delimited ASCII FILE FORMAT: longitute, latitude, veg type, NA*, NA*, cell area, year, sum, max, mean, min, jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec, continent/country NA* = not used All monthly values are 1 decimal place, excluding the mean which has 2 decimal places. NUMBER OF RECORDS: 1,075,692 REFERENCE CITATIONS: Enting I, Wigley T, Heimann M (1994) Future emissions and concentrations of carbon dioxide: key ocean/atmosphere/land analyses. CSIRO Division of Atmospheric Research Technical Paper No. 31, 120pp. FAO-UNESCO (1971) Soil Map of the World, 1:5,000,000. Food and Agricultural Organization and United Nations Educational, Scientific and Cultural Organization, Paris, France. Hulme M (1995) A historical monthly precipitation data for global land areas from 1900 to 1994, gridded at 3.75 x 2.5 resolution. Constructed at climate research Unit, University of East Anglia, Norwich, UK. Jones PD (1994) Hemispheric surface air temperature variations: a reanalysis and an update to 1993. Journal of Climate, 7, 1794-1802. Leemans R, Cramer WP (1991) The IIASA database for mean monthly values of temperature, precipitation, and cloudiness on a global terrestrial grid. IIASA RR-91-18, Laxenburg, Austria. Legates DR, Willmott CJ (1990a) Mean seasonal and spatial variability in global surface temperature. Theoretical Applications in Climatology, 41, 11-21. Legates DR, Willmott CJ (1990b) Mean seasonal and spatial variability in gauge-corrected, global-precipitation. International Journal of Climatology, 10, 11-127. McGuire AD, Clein JS, Melillo JM, Kicklighter, DW, Meier RA, Vorosmarty CJ Serreze MC (2000) Modeling carbon responses of tundra ecosystems to historical and projected climate: sensitivity of Pan-arctic carbon storage to temporal and spatial variation in climate. Global Change Biology, in press. McGuire AD, Melillo JM, Joyce LA, Kicklighter DW, Grace AL, Moore B III, Vörösmarty CJ (1992) Interactions between carbon and nitrogen dynamics in estimating net primary productivity for potential vegetation in North America. Global Biogeochemical Cycles, 6, 101-124. McGuire AD, Melillo JM, Randerson JT, et al. (1999) Modeling the effects of snowpack on heterotrophic respiration across northern temperate and high latitude regions: Comparison with measurements of atmospheric carbon dioxide in high latitudes. Biogeochemistry 48, 91-114 NCAR/Navy (1984) Global 10-minute elevation data. Digital tape available through National Oceanic and Atmospheric Administration, National Geophysical Data Center, Boulder, Colorado. ACKNOWLEDGEMENTS: This research was supported by funds from the ARCSS Program of NSF as a Synthesis, Integration, and Modeling Study (SIMS; OPP-9614253).