Abstract: The MAT3NVCHM or tavg3_3d_chm_Nv data product is the MERRA Data Assimilation System Chemistry 3-Dimensional chemistry on layers that is time averaged, 3D model levels, at native resolution. It is a history file that is intended for forcing off-line chemistry/aerosol models with the results of the reanalysis. Like other histories, they are produced from the GCM during the corrector segment of the IAU cycle. All collections from this group are at reduced horizontal resolution. MERRA, or the Modern Era Retrospective-analysis for Research and Application, is a NASA reanalysis for the satellite era (30 years 1979-current) using the Goddard Earth Observing System Data Assimilation System Version 5 (GEOS-5 DAS). This data product contains fields that do not vary during the reanalysis. Parameters include: MFXC - Eastward mass flux on C-Grid MFYC - Northward mass flux on C-Grid UC - Eastward component of wind on C-Grid VC - Northward component of wind on C-Grid DDPDTANA - Tendency of layer thickness due to analysis The data are on the GEOS-5 native 540 x 361 grid with 2/3° longitude x 1/2° latitude resolution. The files are compacted into a single daily file with the times: 1:30, 4:30, 7:30, 10:30, 13:30, 16:30, 19:30, 22:30 GMT. Data are archived in the HDF-EOS (Grid) format, based on HDF4.
Purpose: Not Available
Supplemental Information: REFERENCE: * Bloom, S., L. Takacs, A. DaSilva, and D. Ledvina, 1996: Data assimilation using incremental analysis updates. Mon. Wea. Rev., 124, 1256-1271. * Bloom, S., A. da Silva, D. Dee, M. Bosilovich, J.-D. Chern, S. Pawson, S. Schubert, M. Sienkiewicz, I. Stajner, W.-W. Tan, M.-L. Wu, 2005: Documentation and Validation of the Goddard Earth Observing System (GEOS) Data Assimilation System - Version 4. Technical Report Series on Global Modeling and Data Assimilation 104606, v26. * Collins, N., G. Theurich, C. DeLuca, M. Suarez, A. Trayanov, V. Balaji, P. Li, W. Yang, C. Hill, and A. da Silva, 2005: Design and implementation of components in the Earth System Modeling Framework. Int. J. High Perf. Comput. Appl., 19, 341-350, DOI: 10.1177/1094342005056120. * Derber, J. C., R. J. Purser, W.-S. Wu, R. Treadon, M. Pondeca, D. Parrish, and D. Kleist, 2003: Flow-dependent Jb in a global grid-point 3D-Var. Proc. ECMWF annual seminar on recent developments in data assimilation for atmosphere and ocean. Reading, UK, 8-12 Sept. 2003. * Koster, R. D., M. J. Su???rez, A. Ducharne, M. Stieglitz, and P. Kumar, 2000: A catchment-based approach to modeling land surface processes in a GCM, Part 1, Model Structure. J. Geophys. Res., 105, 24809-24822. * Purser, R. J., W.-S. Wu, D. F. Parrish, and N. M. Roberts, 2003a: Numerical aspects of the application of recursive filters to variational statistical analysis. Part I: Spatially homogeneous and isotropic Gaussian covariances. Mon. Wea. Rev., 131, 1524-1535.\ * Purser, R. J., W.-S. Wu, D. F. Parrish, and N. M. Roberts, 2003b: Numerical aspects of the application of recursive filters to variational statistical analysis. Part II: Spatially inhomogeneous and anisotropic general covariances. Mon. Wea. Rev., 131, pp. 1536-1548. * Wu, W.-S., R.J. Purser and D.F. Parrish, 2002: Three-dimensional variational analysis with spatially inhomogeneous covariances. Mon. Wea. Rev., 130, 2905-2916.

Progress: In Work
Update Frequency: As needed

Theme Keywords: ISO Topic Keyword, climatologyMeteorologyAtmosphere, GCMD SCIENCE PARAMETERS, EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT, EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION, EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER > LAND COVER, PROJECT, MERRA > MODERN ERA RETROSPECTIVE-ANALYSIS FOR RESEARCH AND APPLICATIONS, EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM, ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM, ANCILLARY KEYWORDS, Mfxc, Mfyc, Uc, Vc, Ddpdtana, Eosdis, ISO TOPIC CATEGORY, CLIMATOLOGY/METEOROLOGY/ATMOSPHERE, DATA SET LANGUAGE, ENGLISH
Place Keywords: GEOGRAPHIC REGION > GLOBAL

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