In-situ measurements of land-atmosphere exchanges of water energy and carbon dioxide in space and time over the heterogeneous Barrax site during SPARC2004

International audienceIn order to advance our understanding of land-atmosphere exchanges of water, energy and CO2 in space and time over heterogeneous land surfaces, an intensive field campaign was carried out at the Barrax agricultural test site in Spain in the period 12-21 July 2004 involving multiple field, satellite and airborne instruments for characterizing the state of the atmosphere, the vegetation and the soil from visible to microwave range of the spectrum. Part of the experimental area is a core site of a 25 km2 area within which numerous crops are grown - on both irrigated and dry land - alongside fields of bare soil. This campaign was carried out in combination with the EU 6FP EAGLE Project. Emphasis of this paper is on the in-situ measurements of land-atmosphere exchanges of water, energy and CO2 as well as the thermal dynamic states of the atmosphere, the soil and the vegetation

Thermal Measurements in the framework of SPARC

International audienceIn this paper, a description of the thermal radiometric measurements carried out in the framework of the Spectra Barrax Campaign (SPARC) is presented. The purpose of these measurements is to retrieve biogeophysical parameters such as land surface emissivity and temperature to analyze the relationship of these parameters with fluorescence. The in situ data base was used to validate high and low resolution sensors such as Airborne Hyperspectral Scanner (AHS), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Spinning Enhanced Visible and Infrared Imager (SEVIRI) and Advanced Along-Track Scanning Radiometer (AATSR), and a synergistic study was firstly developed between SEVIRI and ASTER and secondly between AATSR and CHRIS/PROBA (Compact High Resolution Imaging Spectrometer/ Project for On Board Autonomy). The thermal measurements were carried out basically using two multiband field radiometers (CIMEL CE 312-1 and 312-2) and several single band field radiometers (RAYTEK ST6, RAYTEK MID and EVEREST 3000.4ZLC), pointing at different targets (soil, vegetation, sky). Transects, angular and emissivity measurements were carried out and the results show the importance of thermal measurements to characterize the different surfaces over the test area

Thermal Measurements in the framework of SPARC

International audienceIn this paper, a description of the thermal radiometric measurements carried out in the framework of the Spectra Barrax Campaign (SPARC) is presented. The purpose of these measurements is to retrieve biogeophysical parameters such as land surface emissivity and temperature to analyze the relationship of these parameters with fluorescence. The in situ data base was used to validate high and low resolution sensors such as Airborne Hyperspectral Scanner (AHS), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Spinning Enhanced Visible and Infrared Imager (SEVIRI) and Advanced Along-Track Scanning Radiometer (AATSR), and a synergistic study was firstly developed between SEVIRI and ASTER and secondly between AATSR and CHRIS/PROBA (Compact High Resolution Imaging Spectrometer/ Project for On Board Autonomy). The thermal measurements were carried out basically using two multiband field radiometers (CIMEL CE 312-1 and 312-2) and several single band field radiometers (RAYTEK ST6, RAYTEK MID and EVEREST 3000.4ZLC), pointing at different targets (soil, vegetation, sky). Transects, angular and emissivity measurements were carried out and the results show the importance of thermal measurements to characterize the different surfaces over the test area