AMFIC on AIRSAT- a web data base for hosting and easy retrieval of atmospheric data from satellites Konstantinos Kourtidis 1, Aristeidis Georgoulias 1, Evangelos Kosmidis 2, Fanis Despotakis 2, and Panayiotis Symeonidis 3 1 School of Engineering, Demokritus University of Thrace, Dept. of Environmental Engineering, Xanthi, Greece 2 DOTSOFT S.A., Thessaloniki, Greece 3 Draxis Environmental Technologies LtD., Thessaloniki, Greece

Rationale Satellite instruments produce large amounts data. There is an increased demand for satellite data not only from specialized users but also from researchers and public institutions for research, management, information and education purposes. Many of these potential users lack the expertise to extract the data they need from the formats offered by the repositories. The AMFIC web database has been developed to address the need of these users for fast, easy access of atmospheric composition data. The main idea behind the AMFIC database ( is to offer overpass columnar ascii files with atmospheric composition data for every spot within any region of interest through a set of interactive maps.

Product availability Four different products from different resolution modes (10x10deg, 5x5deg and 1x1deg) WFM-DOAS v1.0 CH4 dry air columnar data (XCH4) for 2003 and 2004, WFM-DOAS v0.6 CO total column data for 2003 and 2004, DOAS v1.0.3 SO2 total column data for the period and TM4NO2A version 1.10 NO2 tropospheric and total column data for the period are available. Database capable of hosting any other atmospheric composition product (level2 or level3) from any satellite instrument (e.g. OMI, GOME-2, GOSAT, MODIS, etc).

Example Daily single pixel swath NO 2 tropospheric column measurements from SCIAMACHY assigned to a 1 o x1 o grid cell covering the greater Thrace region where the Democritus University is located (red square)

Flowchart of the methodology used for the analysis of various datasets

Database short tour

AMFIC-WSDB FRONT data maps showing the general XCH 4 patterns, standard deviation and number of months with available measurements over the region of China for 2003.

AMFIC-WSDB FRONT data file including the annual XCH 4 levels, standard deviation and number of months with available measurements over the region of China for 2003.

AMFIC-WSDB interactive map. The selected grid cell becomes grey.

AMFIC-WSDB BACK data columnar ascii files with all the XCH 4 values in 2003 for the grid cell centered in (36.5 o N, o E).

AMFIC-WSDB BACK data columnar ascii files with the monthly mean XCH 4 standard deviation and number of months with available measurements in 2003 for the grid cell centered in (36.5 o N, o E).

AMFIC-WSDB BACK data graph with all the XCH 4 single pixel values, the monthly mean, the standard deviation and number of months with available measurements in 2003 for the grid cell centered in (36.5 o N, o E).

The AMFIC-WSDB through a short demo project Location of the stations selected for the short demo project which shows the functionality of the AMFIC-WSDB.

Seasonal variability of the SCIAMACHY XCH 4, AIRS , and mbar pressure level CH 4 vmr and NOAA CH 4 flask measurements. The summer peaks are indicated by a colored rectangular.

Main advantages of the database: Allows a wider public to have direct access to satellite observations that they are either dispersed or not in a user- friendly format. Allows the use of parallel satellite measurements of different parameters due to their common spatial and temporal resolution. Allows the easy use of data from people interested in data analysis in conjunction with models but also for users who wish to compare surface observations with the corresponding satellite. Data are suitable even for educational and informational purposes due to the interactive manner in which the system works.

Satellite Earth simulator-AIRSAT Satellite Data Sources TOMS (Earth Probe TOMS)TOMS (Earth Probe TOMS) SCIAMACHY (ENVISAT)SCIAMACHY (ENVISAT) GOME (ERS-2)GOME (ERS-2) MODIS (AQUA)MODIS (AQUA) Meteorological Data Source NCEP/NCAR Reanalysis ProjectNCEP/NCAR Reanalysis Project

Meteorological parameters Temperature Temperature Humidity Humidity Pressure Pressure Wind speed Wind speed Precipitation Precipitation Atmospheric data Ozone vertical column Ozone vertical column NO 2 vertical column NO 2 vertical column Aerosol Optical Thickness over ocean Aerosol Optical Thickness over ocean Cloud Optical Thickness Cloud Optical Thickness Cloud Top Temperature Cloud Top Temperature Optical Depth Land and Ocean Optical Depth Land and Ocean Atmospheric Water Vapour Atmospheric Water Vapour Ocean data Chlorophyll Chlorophyll Sea surface temperature, day/night Sea surface temperature, day/night

An Example: Data from ICSU World Data Center for Remote Sensing of the Atmosphere geographical area data set time period (Spectral Harmonic Analysis applied on NASA EP TOMS Level 2 data)

daily data in csv ascii format (1 o x1 o analysis) daily maps start animation select coordinates

time series for Xanthi [ o N, o E] graph & csv ascii format animation

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