Monitoring physical and biological properties at the Sevilleta LTER using remote sensing

TitleMonitoring physical and biological properties at the Sevilleta LTER using remote sensing
Publication TypeConference Proceedings
Year of Publication2000
AuthorsRitchie J, Schmugge T.J., Rango A., Schiebe F.R.
Conference NameInternational Association of Hydrological Science
VolumeIAHS Publication No. 267
Date Published2001
PublisherRemote Sensing and Hydrology
Conference LocationSanta Fe, NM
ARIS Log Number110215
Keywordsaircraft, data, ground, monitoring, remote sensing, satellite, Sevilleta LTER
AbstractIn 1997, the USDA Agriculture Research Service, Hydrology Laboratory began collecting remotely sensed ground, aircraft, and satellite data on the physical and biological states of two semi-ecosystems (grass and shrub) typical of the Sevilleta Long-Term Ecological Research Program site. Remote sensing measurements were made at Sevilleta in May/June and in September/October of 1997, 1998, and 1999. Radiance, measured at ground an aircraft platforms, was 12 to 40 percent higher for a 30-meter squared area at the shrub site when compared with the grass site. Landscape surface temperatures were similar in the morning but were 3 to 5 degrees Celsius higher under the shrub when compared with the grass site by 1:00 p.m. local time. The shrub site had a lower Leaf Area Index indicating lower surface cover at the shrub site giving a higher soil contribution to the total radiance measured. These differences could have significant effects on the energy and water balances of the Sevilleta site if shrubs continue to expand at the expense of the grassland.