12 Years Mediterranean Satellite Data Set and
Analysis
Dirk Koslowsky
Abstract
Research conducted in the framework of the EU projects EFEDA,
RESRAPS, RESMEDES, and RESYSMED stresses the need to (i) correlate
results obtained at specific sites with a regional or large scale overview at
the conditions in the Mediterranean Basin and (ii) to expand short term
ground based experiments with operational observation of at least a few key
quantities to periods of climatological relevance. Remote sensing techniques
can definitely contribute to this task. NOAA A VHRR data are still the only
source with a satisfying compromise between spatial and time resolution
covering a period longer than a decade of years. To serve these purposes in
all regions of the basin the "Mediterranean Extended Daily One Km
A VHRR Data Set (MEDOKADS)" was developed. It provides as basic
quantities reflectances and radiances in different spectral regions from
which products like albedo, vegetation index, land and sea surface
temperatures, cloud cover and cloud classification are derived. Twelve years
of data covering the western part and six years of basin wide data allow to
identify regional changes and trends related to variability of the climate.
Efforts are ongoing to make the full data set directly accessible and to update
it in nearly real-time which is a prerequisite for a monitoring system for the
Mediterranean environment.
1 Mediterranean Extended Daily One-km AVHRR Data Set
(MEDOKADS)
1.1
Design of the Data Set
The data received by the HRPT receiving station of the Free University of Berlin are
used to process a daily precisely navigated data set covering the Mediterranean and
the surroundings (Koslowsky, 1998, Bolle, 1998). The geographic area of interest,
Analysis
Dirk Koslowsky
Abstract
Research conducted in the framework of the EU projects EFEDA,
RESRAPS, RESMEDES, and RESYSMED stresses the need to (i) correlate
results obtained at specific sites with a regional or large scale overview at
the conditions in the Mediterranean Basin and (ii) to expand short term
ground based experiments with operational observation of at least a few key
quantities to periods of climatological relevance. Remote sensing techniques
can definitely contribute to this task. NOAA A VHRR data are still the only
source with a satisfying compromise between spatial and time resolution
covering a period longer than a decade of years. To serve these purposes in
all regions of the basin the "Mediterranean Extended Daily One Km
A VHRR Data Set (MEDOKADS)" was developed. It provides as basic
quantities reflectances and radiances in different spectral regions from
which products like albedo, vegetation index, land and sea surface
temperatures, cloud cover and cloud classification are derived. Twelve years
of data covering the western part and six years of basin wide data allow to
identify regional changes and trends related to variability of the climate.
Efforts are ongoing to make the full data set directly accessible and to update
it in nearly real-time which is a prerequisite for a monitoring system for the
Mediterranean environment.
1 Mediterranean Extended Daily One-km AVHRR Data Set
(MEDOKADS)
1.1
Design of the Data Set
The data received by the HRPT receiving station of the Free University of Berlin are
used to process a daily precisely navigated data set covering the Mediterranean and
the surroundings (Koslowsky, 1998, Bolle, 1998). The geographic area of interest,