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--- pmip3:cmip6:design:21k:data [2016/03/25 15:53] – jypeter
+++ pmip3:cmip6:design:21k:data [2016/05/04 14:14] (current) – Added a warning saying that the official page is now on the PMIP4 web site jypeter
@@ Line 1: / Line 1: @@
+<note warning>This page was moved to the PMIP4 web site on May 4th 2016!\\ Please use the new web page to get up-to-date information!!\\ https://pmip4.lsce.ipsl.fr/doku.php/data:ice</note>
 ====== PMIP4-CMIP6 ice-sheet data ======
@@ Line 34: / Line 36: @@
   * nb_lat, nb_lon = 1080, 2160 (regular 10 minutes intervals)
-  * latitude_values = [-89.91667175, -89.75, -89.58334351, ... 89.58333588,  89.75      ,  89.91666412]
+  * 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]
+  * longitude_values = [ 0.,  0.16666667,  0.33333334, ... 359.5,  359.66668701,  359.83334351 ]
   * NO time axis (1 time step per file)
-=== Time steps ===
+=== Time steps and data files ===
-  * 48 time steps in 48 files, from 0k to 26k
+  * 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
+  * **Topo**: Topography (Point-value altitude), meters
-  * Orog
+    * on continents: surface altitude (including grounded ice sheet)
-  * sftlf
+    * on ice-free oceans, and where there is floating ice (ice shelves): bathymetry
-  * sftgif
+  * **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 **both** following papers:
+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 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]]
+  * 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]]
+  * 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]]
+  * 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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