HR: 0800h
AN: B41B-0106 [Abstracts]
TI: Terrestrial Productivity in USA derived by A Biogeochemical Model and Remote Sensing Products from 1982
to 1997
AU: * Mu, Q
EM: qiaozhen@ntsg.umt.edu
AF: NTSG, Numerical Terradynamic Simulation Group, College of Forestry and Conservation, The University of
Montana, Missoula, MT 59812
AU: Zhao, M
EM: zhao@@ntsg.umt.edu
AF: NTSG, Numerical Terradynamic Simulation Group, College of Forestry and Conservation, The University of
Montana, Missoula, MT 59812
AU: Running, S W
EM: swr@ntsg.umt.edu
AF: NTSG, Numerical Terradynamic Simulation Group, College of Forestry and Conservation, The University of
Montana, Missoula, MT 59812
AB:
In conterminous USA, Biome-BGC uses the 1980-1997 meteorology data, STATSGO soil texture data for sand/silt/clay percentages
and effective soil depth, MOD12Q1 land cover type 5, and elevation data from GTOPO30 aggregated to 8 km resolution as the
input data. MOD 17 algorithms use remotely sensed AVHRR, FPAR, LAI and DAYMET meteorology data as the input. GPP/NPP mean and
NPP std simulated by Biome-BGC and MOD 17 have the similar patterns in conterminous USA, with Biome-BGC results lower in the
middle from north to south during 1982-1997.
For the annual average over conterminous USA, solar radiation (SRAD) affects GPP/NPP the most, precipitation the second and
VPD the third. The relationships between GPP, NPP and mean temperature are not significant. For the spatial results, the
annual mean temperature decreases in the middle and east part, increases in most of western part. The precipitation decreases
in the western-southern and east part around the five-lake part, increases in the middle, western-northern and east parts of
conterminous USA. VPD (vapor pressure deficit) has the similar change as temperature, increases mainly in the west-south
part. For the Biome-BGC results, GPP/NPP decrease in the northern-eastern, middle and western-southern parts. For the
meteorology variables trends, precipitation conflicts with NPP in the south-west, agrees with GPP/NPP in the middle and east.
DE: 4805 Biogeochemical cycles (1615)
DE: 4815 Ecosystems, structure and dynamics
DE: 3360 Remote sensing
DE: 0315 Biosphere/atmosphere interactions
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting