The software algorithms and production chain for the Weekly Snow Water Equivalent (SWE) Grids have been created (MatLab environment). The product has been created for test years 1995-1998 and 2000 -2008. Product validation is underway through the comparison of test years 1995-1998 to available in situ data from Eurasia. During the validation process, several discrepancies were noted namely in error calculation of the SWE estimate, a by-product of the actual SWE value.
SWE distribution over northern hemisphere (Jan 10 2007)
Software algorithms and production chain for Snow Melt Seasonal Grids (Dates of onset of snow melt and snow clearance) have been completed for Date of Snow Clearance Product. A full dataset of 30 years (1978-2008) has been created. The product has been verified and validated in a journal publication (Takala et al., 2009).
Snow clearance date in northern hemisphere (0.25 deg EASE grid),2008. Julian day from Jan 1.
The processing of MODIS data for years 2001-2008 has been completed. Produced dataset contains the local MODIS Terra Level 1 archive with calibrated and rectified top of atmosphere products. Using the top-of-atmosphere data, NDVI and SCA estimates, as well as cloud masks were calculated for each preprocessed scene. The produced dataset of environmental variables has been revised and found to be accurate.
Level 0 NOAA AVHRR archive is ready for years 2001-2008. the data archive was created as a combination of SYKE's operative archives and FMI's off-line AVHRR archives. The temperature data products are currently being processed.
The input data, which provides the boundary and initial conditions for the model runs, are collected from various global data sources and they are synthetized to global grids. The validation data (i.e. the in situ data set) such as, CO2 fluxes and concentrations, which will be used for assessing the reliability of the model predictions are routinely measured at several stations maintained.
The distribution of the CO2 flux Stations in Finland
The spectral measurements from the spring 2009 campaign were added to the spectral databank.
The phenological dataset purchased from the Finnish Forest Research Institute has been evaluated. In-situ observations of the soil moisture, temperature and dielectric constant were conducted in Sodankylš in October 2009.
Implementation of up to date version of REMO2008 model on computing facilities available for FMI personnel (CSSs facilities) is completed as well as implementation of the version taking tracer transport into account.
Instead of actual coupling of the ecosystem model JSBACH with REMO for SNOWCARBO project we aim at forcing JSBACH offline.
Necessary knowledge on controlling the input and output information streams is partly gained. Unfiltered time-series of SCA and NDVI, in a gridded form, were processed for the years 2001-2008 from MODIS satellite data.
The information needs in carbon balance modelling have been discussed between service providers of land cover information at SYKE and modelling group at FMI. Already available land cover data sets have been demonstrated and evaluated.
Different level of land cover data set for Snowcarbo
Available GlobCover and GLCCD land cover data do not represent Finnish landscape well. For example surface parameter forest ratio (FR) used in the modelling together with GLCCD data deviates significantly from forest ratio calculated using national land cover data (CLC2000) in Finland. Thus surface parameters in local land cover will be enhanced.