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--- pmip3:design:21k:final [2010/03/26 17:18] – jypeter
+++ pmip3:design:21k:final [2010/12/07 00:38] (current) – Added MARGO document submitted by Michal Kucera jypeter
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-//Go to =>// [ [[pmip3:design:pi:final|PI]] ] - [ [[pmip3:design:6k:final|6ka]] ] - [ **21ka** ] - [ [[pmip3:design:lm:final|LM]] ]
+//Go to =>// [ [[pmip3:design:pi:final|PI]] ] - [ [[pmip3:design:6k:final|6ka]] ] - [ **21ka** ] - [ [[pmip3:design:lm:final|LM]] ] & Non-CMIP5 exps: [ [[pmip3:design:li:final|LI]] ]
 ====== 21ka Experimental Design======
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 === Land-sea mask ===
-This mask should be prescribed using the data provided in [[target.nc|file.nc]] where the ''sftlf'' variable is 0 (%) over the ocean and 100 (%) over land.
+This mask should be prescribed using the data provided in the [[pmip3:design:download#last_glacial_maximum|LGM BC download page]], where the ''sftlf'' variable is 0 (%) over the ocean and 100 (%) over land.
-If this proves difficult for a modelling group, the **__minimum__** implementation is to:
+Make sure that the ocean model configuration keeps the following straits open:
+          * Denmark Strait (between Greenland and Iceland).
+          * Gibraltar Strait.
+          * Indonesian Throughflow (ITF).
+The provided land-sea mask includes a Caspian Sea as defined, conservatively, by its modern day contour (the -29 m iso-altitude in this region in ICE-6G v2.0).
+If implementing the land-sea mask proves difficult for a modelling group, the **__minimum__** implementation is to:
       * fill in the Hudson Bay and the Barents sea, which were covered by the main northern hemisphere ice-sheets.
       * close the Bering Strait (by changing the land-sea mask locally or imposing zero flux on water and sea-ice across the Bering Strait).
-      * make sure that the ocean model configuration keeps the following straits open:
-          * Denmark Strait (between Greenland and Ireland).
-          * Gibraltar Strait.
-          * //Indonesia Strait// (//check exact name with Olivier Marti//?).
 === Land surface elevation ===
-The change in surface elevation specified by the ''orog_diff'' variable provided in [[target.nc|file.nc]] should be added to the present-day surface elevation, so that all the participating models will be perturbed in the same way.
+The change in surface elevation specified by the ''orog_diff'' variable provided in the [[pmip3:design:download#last_glacial_maximum|LGM BC download page]] should be added to the present-day surface elevation, so that all the participating models will be perturbed in the same way.
 Note: this specified change assumes that the surface elevation over present-day oceans is zero (m).
@@ Line 60: / Line 63: @@
 === Ice-sheet extent ===
-The ice-sheet extent (aka //land-sea mask//) should be prescribed using the data provided in [[target.nc|file.nc]], where the ''sftgif'' variable is 0 (%) where there is no ice-sheet, or 100 (%).\\ This mask includes **ice shelves**, which should be included in models that allow this feature.
+The ice-sheet extent should be prescribed using the data provided in the [[pmip3:design:download#last_glacial_maximum|LGM BC download page]], where the ''sftgif'' variable is 0 (%) where there is no ice-sheet, or 100 (%).\\ This mask includes **ice shelves**, which should be included in models that allow this feature.
       * The ice shelves can be defined from the ''sftgif'' and ''sftlf'' variables as areas where:\\ ''sftgif'' == 100 **and** ''sftlf'' == 0
       * Groups implementing the provided ice shelves should keep the Greenland-Iceland ridge open in the ocean configuration.
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 === Ocean bathymetry ===
-The mean sea-level change corresponding to the ice-sheet reconstruction to be used in the PMIP3 LGM experiment is approximatively NNN m. A more complete description of the change in bathymetry can be computed from the Peltier [[https://pmip3.lsce.ipsl.fr/under_construction_ask_jy|ICE-6G v2.0 reconstruction]].
+The mean sea-level change corresponding to the ice-sheet reconstruction to be used in the PMIP3 LGM experiment is approximatively 116 m. A more complete description of the change in bathymetry can be computed from the Peltier [[https://pmip3.lsce.ipsl.fr/under_construction_ask_jy|ICE-6G v2.0 reconstruction]].
 The ocean bathymetry will be adapted by each group, depending on the flexibility of their ocean model.
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 The river pathways and basins should be at least adjusted so that fresh water is conserved at the Earth's surface: care should be taken that rivers reach the ocean (due to the lower sea level at LGM, some river mouths have to be displaced towards the coast).
-You can use the river routing provided by Lev Tarasov to change the routing scheme in your code, so that the river pathways is consistent with the presence of the ice-sheet.
+You can use the river routing provided by Lev Tarasov to change the routing scheme in your code, so that the river pathways is consistent with the presence of the ice-sheet. Please note that to our knowledge, so far, no group has attempted to introduce these changes in river runoff in their model configuration. We would appreciate some feedback from groups who who choose to use this data.
 \\ Data files are available on the [[pmip3:design:download#pmip3-cmip5_files_for_boundary_conditions|Files for PMIP3 experiments]] page.
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   * The spin up procedure is up to each group, following CMIP5 approach or from a previous cold state.
-  * Note several groups share the same ocean models for which an initial state can be provided from PMIP2 experiments.\\ If you need an initial state from another group, you can get in touch with [[Olivier.marti@lsce.ipsl.fr]] and [[pmip2db@lsce.ipsl.fr|Jean-Yves Peterschmitt]].
+  * Note several groups share the same ocean models for which an initial state can be provided from PMIP2 experiments.\\ If you need an initial state from another group, you can get in touch with [[Olivier.marti@lsce.ipsl.fr|Olivier Marti]] and [[pmip2db@lsce.ipsl.fr|Jean-Yves Peterschmitt]].
+  * Groups with high resolution model for which it is too difficult to run long simulations should contact [[Olivier.marti@lsce.ipsl.fr|Olivier Marti]] and [[pmip2db@lsce.ipsl.fr|Jean-Yves Peterschmitt]] to find the best alternative solution.
+===== PMIP3 Kyoto meeting related documents =====
+  * {{:pmip3:design:21k:margo_memorandum1.pdf|The MARGO synthesis of sea-surface temperature reconstructions for the Last Glacial Maximum as a benchmark for PMIP3 data-model comparison}}\\ Perspectives and limitations discussion document - 6.12.2010\\ MARGO core group: Michal Kucera, Alan Mix, André Paul, Antoni Rosell-Melé, Ralph Schneider, Claire Waelbroeck, Mara Weinelt
+===== Links =====
+  * PCMIP Project (**P**alaeo**C**arbon **M**odelling **I**ntercomparison **P**roject)\\ http://www.bridge.bris.ac.uk/projects/pcmip
-  * Groups with high resolution model for which it is too difficult to run long simulations should contact [[Olivier.marti@lsce.ipsl.fr]] and [[pmip2db@lsce.ipsl.fr|Jean-Yves Peterschmitt]] to find the best alternative solution.
+  * CMIP5 (**C**oupled **M**odel **I**ntercomparison **P**roject Phase **5**)\\ http://cmip-pcmdi.llnl.gov/cmip5/
 \\ \\ \\