Changes between Version 3 and Version 4 of GroupActivities/Meetings/Other


Ignore:
Timestamp:
01/08/14 15:06:11 (8 years ago)
Author:
aducharne
Comment:

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  • GroupActivities/Meetings/Other

    v3 v4  
    2626'''We then discussed the possibility to use higher resolution topographical datasets to calculate topo_resid''', which is presently defined at the 0.5° resolution, based on the dataset produced at the same resolution by Vorosmarty et al. (2000) : ''Global system of rivers: Its role in organizing continental land mass and defining land-to-ocean linkages, Global Biogeochem. Cycles, 14, 599–621.'' 
    2727 
    28 The main two options are to start from Hydro1k (http://webgis.wr.usgs.gov/globalgis/metadata_qr/metadata/hydro1k.htm) or HydroSHEDS (http://hydrosheds.cr.usgs.gov/index.php), which are both hydrologically conditionned DEMs, at the 30 arc-sec =1 km and 15 arc-sec resolution respectively. Hydro1k misses data in Australia and does not use a global projection. HydroSHEDs does, but lacks information in Antartica, which is not very limiting since LMDZ does impose an icecap over this continent for the moment.  
     28The main two options are to start from Hydro1k (http://webgis.wr.usgs.gov/globalgis/metadata_qr/metadata/hydro1k.htm) or HydroSHEDS (http://hydrosheds.cr.usgs.gov/index.php), which are both hydrologically conditionned DEMs, at the 30 arc-sec =1 km and 15 arc-sec resolution respectively. Hydro1k does not use a global projection, which may induce continuity problems. HydroSHEDs does, but lacks information at high latitudes (above 60°), which is problematic for all Arctic rivers. 
    2929 
    30 '''We propose to undertake this work based on HydroSHEDS''', as part of the PhD thesis of AS, supervised by AS. JP will provide support to ascertain the precise information required by ORCHIDEE. Marie Sylvestre, specialist of Geographic Information Systems (GIS) in Sisyphe, will provide technical support. We will submit this work to the ORCHIDEE group is critical decisions need to be taken, and in any case to show the comparison with the original version.  
     30We propose to better analyze the pros and cons of the two datasets, as part of the PhD thesis of AS, supervised by AD. JP will provide support to ascertain the precise information required by ORCHIDEE. Marie Sylvestre, specialist of Geographic Information Systems (GIS) in Sisyphe, will provide technical support. We will submit this work to the ORCHIDEE group before for final decision.  
    3131 
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