Documents


The following documents describe the work carried out during the project:

  • Consolidation of Evapotranspiration Scientific Requirements: In this document the technical and user requirements for the development of the project ET products were evaluated. These requirements were also driving the requirements for the Reference Input Data Set used to derive the ET products. The report includes the results of a survey based on a online questionaire sent to potential ET users inquiring about the technical requirements for different ET applications.
  • Preliminary Analyses of ET Algorithms: This document explores the advantages and limitations of a suite of currently existing algorithms with the aim of selecting a subset of appropriate methods for future project activities. The requirements and data needs of current algorithms are explored and their applicability at regional and continental scale are assessed.
  • Land Surface Temperature Production: This document describes the production of the Land Surface Temperature (LST) data sets, which is one of the project internally generated products. LST is calculated from L1 radiances from AATSR, onboard ESA’s EnviSAT polar-orbiting satellite, from MTSAT-2 (over Australia), MSG-2 and GOES-12 (full disks). A product User Guide is also available.
  • Land Surface Temperature Validation: The results of the WACMOS-ET LST validation study are presented here. Firstly, a comparison against ground-based measurements acquired by continuously operating stations provided an absolute reference point of the LST with respect to highly accurate and well-calibrated radiometers. Secondly, an inter-comparison with other LST products was carried out in order to provide a spatial dimension to the validation and to identify spatial patterns in LST accuracy.
  • Vegetation Parameters Production: This document describes the generation of the project internally generated vegetation parameters LAI and fAPAR and LAI. LAI and fAPAR are derived from an inversion of a 1D RT scheme against the GlobAlbedo albedo values in the VIS (400-700 nm) and NIR/SWIR (700-3000 nm) wavelengths. A description of the albedo product can be obtained from the GlobAlbedo project.
  • Vegetation Parameters Validation: An evaluation of the project generated LAI and fAPAR is presented in this document. A detailed discussion of the particularities of this LAI and fAPAR product in the context of other existing similar products is included and should be read carefully before applying this LAI and fAPAR product. A validation of the albedo product can be obtained from the GlobAlbedo project.
  • Reference Input Data Set (RIDS): The products of the WACMOS-ET Reference Input Data Set (RIDS) are described here. The main drivers for the product selection and development were to fulfill the input requirements for the project selected ET parameterizations, exploiting European Earth Observation Assets as much as possible, and assuring a relatively large internal consistency between the different products.
  • Evapotranspiration Production: This document describes the generation of the WACMOS-ET evapotranspiration (ET) data set. The data set consist of a suite of ET products generated by running four ET algorithms with the relevant products of the RIDS. The ET generation was organized around three spatial scales. Firstly, the ET models were run at a group of tower flux locations using as much as possible the tower meteorological data. The ET models were also run at the tower with satellite co-located inputs. Secondly, the ET models were run at a spatial resolution of ~25 km over all continental surfaces. Lastly, one relatively small area have been used to run the ET models at a smaller (compared with the continental runs) spatial resolutions of ∼1 and ∼5 km.
  • Evapotranspiration Validation: This document describes the evaluation of the project ET product at the different scales. The ET products from the four selected algorithms have been compared with ET derived from eddy covariance observations at flux towers, estimates from other ET products using similar algorithms but different forcings, and ET derived from applying catchment water balance over a selected number of basins.
  • Roadmap: A scientific roadmap describing the required development steps in order to continue advancing towards the generation of ET products is given here.