HR: 1330h
AN: H22B-0922    [PDF]
TI: Monitoring forest-atmosphere exchanges with remote sensing
AU: * min, q
EM: min@asrc.cestm.albany.edu
AF: Atmospheric Sciences Research Center, State University of New York, Albany, New York, 251 Fuller Road, Albany, NY 12203
AU: Lin, B
EM: bing.lin-1@nasa.gov
AF: NASA Langley Research Center, Hampton, Hampton, VA 23681
AB: In this study the microwave land surface emissivity (MLSE) has been retrieved by combining surface observations and coincident SSM/I radiance over the heavily forested area, Harvard Forest, for two growing seasons of 1999 and 2000. Decoupled from the soil moisture underneath the forest, plant water amount indicated by MLSE shows an increasing trend of moisture after the leaf emergence. The increase in plant water amount over Harvard Forest during the growing season may contribute to the decrease in surface albedos in the near infrared (NIR) wavelengths and total shortwave. Diurnal variation of MLSE decreases significantly as the growing season proceeds, due to the acceleration of evapotranspiration process. Further, the emissivity difference between 19 GHz and 37 GHz correlates well with the canopy resistance, as well as albedos of total shortwave and PAR. It demonstrates the potential of multi-platform/multi-spectrum remote sensing for monitoring evapotranspiration and CO2 uptake.
DE: 1640 Remote sensing
DE: 1655 Water cycles (1836)
SC: Hydrology [H]
MN: 2003 Fall Meeting