The Updated ESA Earth System Model for Future Gravity Mission Simulation Studies -------------------------------------------------------------------------------- Henryk Dobslaw (GFZ Potsdam), March 16th, 2015 Data Description ---------------- All data-sets of the updated ESM are provided in ascii files; the file format follows the ICGEM conventions like the original dataset of Gruber et al. (2011). The files of the updated ESM are accessible via DOI:10.5880/GFZ.1.3.2014.001. The individual files belonging to the ESM are organized into five different directories: mtmshc/ This directory contains spherical harmonic coefficients for the individual components of the updated ESM, namely the IB-corrected atmosphere (A), ocean (O), the terrestrially stored water (H), land ice (I), and solid Earth effects (S). In addition, the sum of all five components is given as AOHIS. All data-sets have a spectral resolution of d/o = 180, and a temporal resolution of 6 hours. The data is available for the years 1995 until 2006, files are grouped for each year in tar archives. mtm3h/ The updated ESM additionally provides high-resolution data-sets with 3 hourly sampling and a spectral resolution of d/o = 360 for the year 2006. Individual components (A, O, H, I, S) are available together with the sum of all five components AOHIS. The data is grouped into monthly tar archives. Moreover, a second high-resolution data-set for the atmosphere is available for 2006 where mass variability over Europe is replaced by model predictions of the regional atmospheric model COSMO- EU. The component is abbreviated as ’Ac’. Consequently, a second sum of the five components that includes COSMO-EU is provided under the label ’AcOHIS’. mtmnIB/ In addition to the IB-corrected atmospheric component, there is an additional atmospheric data-set without the application of the IB-correction over the oceans (AnoIB). The component has a spectral resolution of d/o = 180, a temporal sampling of 6 hours, and covers the years 1995 until 2006. Individual files are grouped into yearly tar archives. Note that there is no sum that includes AnoIB, since the sum of A and O is identical to AnoIB and OnoIB per definition of the IB-correction. mtmdeal/ A realistically perturbed de-aliasing model for high-frequency mass variability in atmosphere and ocean is provided in two separate components: The 'DEAL' coefficients differ from 'AO' of the source model only by means of the physical processes currently also omitted in GRACE AOD1B RL05. 'AOerr' represents a series of true errors as the sum of both large-scale and small-scale errors with zero mean and stationary variance that need to be added to 'DEAL' in order to arrive at a realistically perturbed background model. mtmmisc/ The land-water mask applied for the updated ESM is provided here in spherical harmonics up to d/o = 360. Reference Paper --------------- Dobslaw, H., Bergmann-Wolf, I., Dill, R., Forootan, E., Klemann, V., Kusche, J. & Sasgen, I. (2015). The Updated ESA Earth System Model for Future Gravity Mission Simulation Studies, J. Geodesy, 89, 505--513, doi:10.1007/s00190-014-0787-8. Documentation ------------- Dobslaw, H., Bergmann-Wolf, I., Dill, R., Forootan, E., Klemann, V., Kusche, J. & Sasgen, I. (2014). Updating ESA’s Earth System Model for Gravity Mission Simulation Studies: 1. Model Description and Validation, Scientific Technical Report No. 14/07, GFZ Potsdam, Potsdam, doi:10.2312/GFZ.b103-14079. Bergmann-Wolf, I., Dill, R., Forootan, E., Klemann, V., Kusche, J., Sasgen, I. & Dobslaw, H. (2014). Updating ESA’s Earth System Model for Gravity Mission Simulation Studies: 2. Comparison with the Original Model, Scientific Technical Report No. 14/08, GFZ Potsdam, Potsdam, doi:10.2312/GFZ.b103-14088. Bergmann-Wolf, I., Forootan, E., Klemann, V., Kusche, J. & Dobslaw, H. (2015). Updating ESA’s Earth System Model for Gravity Mission Simulation Studies: 3. A Realistically Perturbed Non-Tidal Atmosphere and Ocean De-Aliasing Model, Scientific Technical Report No. 14/09, GFZ Potsdam, Potsdam, doi:10.2312/GFZ.b103-14091. Data Access ----------- Dobslaw, H., Bergmann-Wolf, I., Dill, R., Forootan, E., Klemann, V., Kusche, J. & Sasgen, I. (2015). The Updated ESA Earth System Model for Future Gravity Mission Simulation Studies, GFZ German Research Centre for Geosciences, doi:10.5880/GFZ.1.3.2014.001. Project Web-Page ---------------- http://www.gfz-potsdam.de/en/section/earthsystemmodelling/services/esa-esm/