Contributions to Books:
A. Bartsch, W. Wagner, R. Kidd:
"Remote Sensing of Spring Snowmelt in Siberia";
in: "Environmental Change in Siberia, Advances in Global Change Research 40",
H. Balzter (ed.);
Active as well as passive spaceborne sensors can be used to monitor
spring snowmelt on regional to continental scale. Change detection methods are
used to determine dates related to the thaw period. They comprise initial thaw,
primary thaw, start of diurnal thaw/refreeze period, mean date of thaw, end of thaw
and start of greening-up of vegetation. Only the latter is determined by use of passive
optical sensors and combines measurements of visible and infrared radiation.
All other approaches use microwave data. Some instruments such as the scatterometer
Seawinds on QuikScat and the radiometer AMSR-E on Aqua make several
measurements per day allowing the detection of diurnal thaw and refreeze, which
is characteristic of the spring snowmelt period in northern latitudes. A specific,
diurnal difference approach developed for QuikScat allows the determination of
the length of the final period of diurnal thaw/refreeze. This duration and the spatial
dynamics are closely linked to surface hydrology and ecosystem processes.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.