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data:ice [2016/05/04 12:27]
jypeter Changed the important WRAP at the top 		data:ice [2019/02/25 16:34] (current)
jypeter [References] Replaced refs with link to the pubs page
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 ====== PMIP4-CMIP6 ice-sheet data ====== ====== PMIP4-CMIP6 ice-sheet data ======
  
-<WRAP important round center 60%> +<WRAP info round center 60%> 
-You will find on this page the boundary condition data that you have to use for the [[exp_design:lgm|Last Glacial Maximum]] and the [[exp_design:deglaciation|Last Deglaciation]] experiments+You will find on this page some of the boundary condition data that you have to use for 
 +  * [[exp_design:lgm|Last Glacial Maximum]] 
 +  * [[exp_design:degla|Last Deglaciation]] 
 +  * [[exp_design:degla_t2|Penultimate Deglaciation]]
  
 Please make sure to read the [[#how_to_use_the_data|HOWTO]] section in order to use the data correctly! Please make sure to read the [[#how_to_use_the_data|HOWTO]] section in order to use the data correctly!
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 | [[R.Ivanovic@leeds.ac.uk|Ruza Ivanovic]] | Last Deglaciation | | [[R.Ivanovic@leeds.ac.uk|Ruza Ivanovic]] | Last Deglaciation |
 | [[Didier.Roche@lsce.ipsl.fr|Didier Roche]] | LGM, Last Deglaciation | | [[Didier.Roche@lsce.ipsl.fr|Didier Roche]] | LGM, Last Deglaciation |
 +| [[l.menviel@unsw.edu.au|Laurie Menviel]] | Penultimate Deglaciation |
 +| [[capron@nbi.ku.dk|Emilie Capron]] | Penultimate Deglaciation |
 | [[Jean-Yves.Peterschmitt@lsce.ipsl.fr|Jean-Yves Peterschmitt]] | Technical questions | | [[Jean-Yves.Peterschmitt@lsce.ipsl.fr|Jean-Yves Peterschmitt]] | Technical questions |
 </WRAP> </WRAP>
 +
 +===== References =====
 +
 +Check the [[pubs:special#pmip4_experiments|PMIP4 experiments design papers]]
 +
  
 ===== How to use the data ===== ===== How to use the data =====
  
-  * Choose the type of boundary condition you want to use. Look at the available data below, and at the [[pmip3:cmip6:design:21k:gallery|ice-sheet gallery]] page.+  * Choose the type of boundary condition you want to use. Look at the available data below, and at the [[https://wiki.lsce.ipsl.fr/pmip3/doku.php/pmip3:cmip6:design:21k:gallery|ice-sheet gallery]] page.
     * Do not forget to document what you have chosen!     * Do not forget to document what you have chosen!
-  * blahblah+  * Read the appropriate paper(s) in the [[#references|References]] above
   * After processing the boundary condition data, send a copy the BC data //as seen by your model// to [[Jean-Yves.Peterschmitt@lsce.ipsl.fr|Jean-Yves Peterschmitt]]: netCDF file and plot   * After processing the boundary condition data, send a copy the BC data //as seen by your model// to [[Jean-Yves.Peterschmitt@lsce.ipsl.fr|Jean-Yves Peterschmitt]]: netCDF file and plot
  
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 The data files may change a bit (rename or standardize the data, etc...) and you will find the change list below The data files may change a bit (rename or standardize the data, etc...) and you will find the change list below
  
-==== Peltier ICE-6G-C for PMIP4 ==== +==== Data ====
- +
-=== Grid === +
- +
-  * nb_lat, nb_lon = 1080, 2160 (regular 10 minutes intervals) +
-  * latitude_values = [ -89.91667175, -89.75, -89.58334351, ... 89.58333588,  89.75      ,  89.91666412 ] +
-  * longitude_values = [ 0.,  0.16666667,  0.33333334, ... 359.5,  359.66668701,  359.83334351 ] +
-  * NO time axis (1 time step per file) +
- +
-=== Time steps and data files === +
- +
-  * 48 time steps in 48 files, from 0k to 26k BP : data every 500 years from 0k to 21k BP, then every 1000 years till 26k BP +
-  * file names = ''I6_C.VM5a_10min.<time_slice>.nc''\\ with <time_slice> in [0, 0.5, 1, ..., 20, 20.5, 21, 22, 23, 24, 25, 26] +
-  * all the variables for the same time step are in the same file +
- +
-=== Variables === +
- +
-  * **Topo**: Topography (Point-value altitude), meters +
-    * on continents: surface altitude (including grounded ice sheet) +
-    * on ice-free oceans, and where there is floating ice (ice shelves): bathymetry +
-  * **Orog**: Orography (Point-value surface altitude), meters +
-    * on continents: altitude (including grounded ice sheet) +
-    * on ice-free oceans: 0.0 (zero) +
-    * on ice-shelves: surface altitude +
-  * **sftlf**: Point-value Landmask, % +
-    * values are ''0'' (not land) or ''100'' (land) +
-    * does not include floating ice +
-  * **sftgif**: Point-value Icemask, % +
-    * values are ''0'' (not ice) or ''100'' (ice) +
-    * floating ice is included +
- +
-Notes: +
- +
-  * Computing the ''sftlf-sftgif'' difference yields: +
-    * 100: where there is land without ice +
-    * -100: where there is floating ice-sheet +
-    * 0: elsewhere +
- +
-=== References === +
- +
-Please cite **all** following papers: +
- +
-  * Describe the new Antarctic component of the model: Argus, D.F., Peltier, W.R., Drummond, R. and Moore, A.W. - **The Antarctica component of postglacial rebound model ICE-6G_C (VM5a) based upon GPS positioning, exposure age dating of ice thicknesses, and relative sea level histories**.  Geophys. J. Int., 198, 537-563, 2014, [[http://gji.oxfordjournals.org/content/early/2014/05/29/gji.ggu140|10.1093/gji/ggu140]] +
- +
-  * Describe the complete model: Peltier, W.R., Argus, D.F. and Drummond, R. (2015) **Space geodesy constrains ice-age terminal deglaciation: The global ICE-6G_C (VM5a) model**.  J. Geophys. Res. Solid Earth, 120, 450-487, [[http://onlinelibrary.wiley.com/doi/10.1002/2014JB011176/abstract|doi:10.1002/2014JB011176]] +
- +
-=== Download === +
- +
-FIXME +
- +
-==== Tarasov GLAC-1D for PMIP4 ==== +
- +
-=== Grid === +
- +
-  * nb_lat, nb_lon = 360, 360 +
-  * latitude_values = [ -89.75, -89.25, -88.75, ... 88.75,  89.25,  89.75 ] +
-  * longitude_values = [ 0.5,  1.5,  2.5, ... 357.5,  358.5,  359.5 ] +
-  * time axis: see the //Time steps// section below +
- +
-=== Time steps and data files === +
- +
-  * 261 time steps in one file, from 0k to 26k : data every 100 years, from 0k to 26k BP +
-  * time_values = [ -26. , -25.9, -25.8, ... -0.2, -0.1,  0. ] +
-  * all the variables and all the time steps are in the same file: ''TOPicemsk.GLACD26kN9894GE90227A6005GGrBgic.nc'' +
- +
-=== Variables === +
- +
-  * **HDC**: GLAC contemp. elevation(masl), meters +
-    * on continents (including ice sheets) and ice shelves: surface altitude (including ice sheets/shelves) +
-    * on ice-free ocean: bathymetry +
-  * **HDCB**: GLAC contemp. elevation(masl), bathymetry for floating ice, meters +
-    * on continents (including ice sheets) and ice shelves: surface altitude (including ice sheets) +
-    * on ice-shelves: altitude of the bottom of the floating ice +
-    * on ice-free ocean: bathymetry +
-  * **ICEM**: GLAC ice mask, fraction +
-    * ice fraction values between 0.0 (no ice) and 1.0 (100% ice) +
- +
-Notes: +
- +
-  * The land-sea mask can be computed with: +
-    * HDCB > 0 : ls_mask = 1 (land) +
-    * HDCB <= 0 : ls_mask = 0 (no land) +
-  * Computing the ''HDC-HDCB'' difference yields: +
-    * ice-shelves thickness where there are ice shelves +
-    * 0.0 everywhere else +
- +
-=== References === +
- +
-Please cite **all** the following papers:+
  
-  * L. Tarasov and W. Richard Peltier **Greenland glacial history and local geodynamic consequences**, Geophysical Journal International, 150, 198-229, [[http://onlinelibrary.wiley.com/doi/10.1046/j.1365-246X.2002.01702.x/abstract|doi:10.1046/j.1365-246X.2002.01702.x]] +  * [[data:ice_ice6g_c|Peltier ICE-6G-C for PMIP4]] 
-  * Lev Tarasov, Arthur S. Dyke, Radford M. Neal and W.R. Peltier, **A data-calibrated distribution of deglacial chronologies for the North American ice complex from glaciological modeling**, Earth and Planetary Science Letters, Volumes 315–316, 15 January 2012, Pages 30–40, [[http://www.sciencedirect.com/science/article/pii/S0012821X11005243|doi:10.1016/j.epsl.2011.09.010]] +  * [[data:ice_glac_1d|Tarasov GLAC-1D for PMIP4]]
-  * Robert D. Briggs , David Pollard , Lev Tarasov, **A data-constrained large ensemble analysis of Antarctic evolution since the Eemian**, Quaternary Science Reviews, Volume 103, 1 November 2014, Pages 91–115, [[http://www.sciencedirect.com/science/article/pii/S0277379114003448|doi:10.1016/j.quascirev.2014.09.003]] +
-  * 4th paper to be added here (Eurasian component)+
  
-=== Download === 
  
-FIXME 
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  • Last modified: 2016/05/04 12:27
  • by jypeter