MODIS Land surface temperature
AccessUNRESTRICTED This data set is only available for a restricted user group, please contact us if you want to access these data. RESTRICTED only accessable in ZMAW net or via CliSAP login What does that mean? Data access via file system /data/icdc/land/modis_landsurfacetemperature
DescriptionHere we offer monthly means of the land surface temperature as derived from infrared radiances measured with the MODIS-AQUA sensor at its channels 31 and 32. From radiances obtained under clear-sky conditions the land surface temperature is obtained using a split window technique. This data set is the final product of a product chain. In this chain, the land surface temperature is calculated for each day first for single MODIS overpasses, then for tiles with 1000 m resolution and finally for the climate modeling grid (CMG) with 0.05° grid resolution. These daily data are further processed in order to receive 8-day composites or even a monthly mean. To produce this data set other parameters (actually all MODIS products) are required, that is the MODIS vertical temperature and water vapour profiles, the MODIS cloud mask, the land cover distribution, and the snow cover. The data offered here are based on MODIS-TERRA; the time period covered by MODIS-AQUA data is shorter and is therefore not offered here. For more and detailed information, please see the User's Guide.
Parameters
Coverage, spatial and temporal resolutionPeriod and temporal resolution:
Coverage and spatial resolution:
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Data qualityThe data offered here are part of the well-validated Version 5 of the MODIS product suite; therefore this data can expected to have a high quality level. The accuracy of the retrieved land surface temperature is given in the data set in form of a quality flag (see parameters). Generally, only those grid cells contain a valid value where a proper land surface temperature retrieval was possible. Gaps in the data are almost solely based upon a persistent cloud cover. The original data set includes a couple of more parameters such as the observation time, observation angle, number of days with clear-sky conditions during the month under consideration as well as emissivities of channels 20, 22, 23, 29, 31, 32. All this information is not included in the data set offered here, however, in order to keep it simple and the data volume low. New results indicate that there might be a cold bias (clear sky bias) of MODIS LST over winter-time snow covered areas. Please look into the documents listed under references for calibration / validation activities and results.
ContactLPDAAC User Services U.S. Geological Survey (USGS) Center for Earth Resources Observation and Science (EROs) email: LPDAAC@usgs.gov phone: ++1 605-594-6116
Stefan Kern ICDC, CliSAP, Universität Hamburg email: stefan.kern@zmaw.de
References
Data citationPlease cite data upon usage as follows: These data are distributed by the Land Processes Distributed Arctive Archive Center (LP DAAC), located at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center (lpdaac.usgs.gov), distributed in netCDF format by the Integrated Climate Data Center (ICDC, http://icdc.zmaw.de) University of Hamburg, Hamburg, Germany.
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