Earth  ID: 30583

AXIOM-1 Sea Surface Salinity, Sea Ice Thickness and Atmospheric Precipitable Water

AXIOM-1 (eXperimental Analysis of sea Ice and Ocean Mesoscale version 1) is a coupled analysis of the global ocean and sea ice obtained by assimilating Aquarius sea surface salinity (SSS) and MODIS chlorophyll data together with sea surface temperature (SST) and sea ice concentrations from the OSTIA objective analysis into a global high-resolution coupled ocean/ atmosphere/sea ice model. The coupled model components are the MOM-5 ocean general circulation model, the GEOS-5 atmospheric general circulation model and the CICE sea ice model. The ocean and sea ice model horizontal resolutions vary from 11km to less than 3km in the Arctic and the atmospheric model resolution is the same as that used to produce the GMAO operational weather forecasts (25km).


As a preamble to a fully coupled integrated earth system analysis, the atmospheric model is constrained to the GMAO MERRA-2 atmospheric reanalysis (prior to June 2013) and to the GMAO operational forward processing stream (after June 2013) while the SST, SSS, ice concentration and chlorophyll data are assimilated into the coupled model using a new methodology [State Adaptive Forecast-error Estimation (SAFE): http://gmao.gsfc.nasa.gov/pubs/docs/Keppenne721.pdf] developed especially for high-resolution data assimilation.


This animation shows the ocean SSS and sea ice thickness fields (shown over grid cells where the fractional ice coverage is greater than 15%) and the vertical integral of atmospheric precipitable water (transparent overlay) sampled every 6 hours from June 1, 2012 to November 1, 2014 from a reanalysis completed with the AXIOM-1 system. The precipitations associated with tropical cyclones and other major storm systems induce localized surface freshenings which makes the corresponding storm tracks visible in the SSS field.

 

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Credits

Christian L. Keppenne (Science Systems and Applications Inc. (SSAI)): Lead Animator
Eric Sokolowsky (GST): Project Support
Christian L. Keppenne (Science Systems and Applications Inc. (SSAI)): Scientist
Steve Graham (GST): Project Support
Please give credit for this item to:
NASA's Scientific Visualization Studio

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Data Used:
AXIOM-1 Coupled Reanalysis
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

Keywords:
SVS >> HDTV
GCMD >> Earth Science >> Atmosphere >> Atmospheric Water Vapor >> Precipitable Water
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Sea Ice Concentration
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Depth/Thickness
GCMD >> Earth Science >> Oceans >> Salinity/Density >> Salinity
SVS >> Hyperwall
NASA Science >> Earth
SVS >> Presentation
GCMD >> Earth Science >> Climate Indicators >> Atmospheric/ocean Indicators >> Surface Salinity
SVS >> Salinity
SVS >> Sea Ice Thickness
GCMD >> Earth Science Services >> Models >> Coupled Climate Models
GCMD >> Earth Science Services >> Models >> Earth Science Reanalyses/Assimilation Models

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0