Time series remote sensing of a climatically sensitive lake
- University College London, Surrey (United Kingdom)
The importance of remote sensing of lake area and level changes for climate research, particularly for closed lakes in semiarid regions, is noted, and the initial need for simultaneous measurement of level and area is discussed. The European Space Agency's ERS-1 satellite is uniquely suited to the latter task, carrying a radar altimeter and the Along-Track Scanning Radiometer (ATSR), the latter providing regular global repeat coverage at 1 km resolution for the first time. The accuracy of two area measurement algorithms are assessed using simulated coarse resolution ([approx]1 km) data for a semiarid closed lake, and one of them is shown to be capable of retrieving an area of 133 km[sup 2] to 1%. Results are presented using data from the Advanced Very High Resolution Radiometer (AVHRR) instrument (similar to ATSR), showing the measured area of a small ([approx]140 km[sup 2]) climatically sensitive lake over a 5-year period, that display significant interannual variability that can be correlated with climate. In addition, it is shown that the sensitivity of a closed lake to changes in catchment basin precipitation is increased if its inflow is derived from the outflow of an open lake.
- OSTI ID:
- 6653326
- Journal Information:
- Remote Sensing of Environment; (United States), Journal Name: Remote Sensing of Environment; (United States) Vol. 50:2; ISSN RSEEA7; ISSN 0034-4257
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved SST estimates for AVHRR from ATSR data through a neural network approach
Integration of remote sensing and geographic information systems for Great Lakes water quality monitoring