netcdf I4M_5367037_1_10065683293096106946 {
dimensions:
lat = 761 ;
bounds = 2 ;
lon = 761 ;
time = UNLIMITED ; // (106 currently)
variables:
double lat_bnds(lat, bounds) ;
lat_bnds:axis = "Y" ;
lat_bnds:long_name = "latitude" ;
lat_bnds:standard_name = "latitude" ;
lat_bnds:units = "degrees_north" ;
double lon_bnds(lon, bounds) ;
lon_bnds:axis = "X" ;
lon_bnds:long_name = "longitude" ;
lon_bnds:standard_name = "longitude" ;
lon_bnds:units = "degrees_east" ;
double time(time) ;
time:standard_name = "time" ;
time:long_name = "time" ;
time:units = "days since 1995-01-01 00:00:00" ;
time:calendar = "365_day" ;
time:axis = "T" ;
double lon(lon) ;
lon:standard_name = "longitude" ;
lon:long_name = "longitude" ;
lon:units = "degrees_east" ;
lon:axis = "X" ;
double lat(lat) ;
lat:standard_name = "latitude" ;
lat:long_name = "latitude" ;
lat:units = "degrees_north" ;
lat:axis = "Y" ;
float sftflf(time, lat, lon) ;
sftflf:units = "1" ;
sftflf:_FillValue = 1.e+20f ;
sftflf:missing_value = 1.e+20f ;
sftflf:cell_methods = "area: time: mean where ice_sheet" ;
sftflf:cell_measures = "area: areacellg" ;
sftflf:standard_name = "floating_ice_shelf_area_fraction" ;
sftflf:long_name = "Ice Shelf Collapse Mask" ;
sftflf:comment = "This dataset is an anomaly with respect to a climatology (1995-2014)." ;
// global attributes:
:source = "CNRM-CM6-1-ssp585-1-0 derived dataset computed from CMIP6 CNRM-CM6-1 historical and ssp585 simulations for ISMIP6" ;
:institution = "NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA" ;
:Conventions = "CF-1.7 CMIP-6.2" ;
:activity_id = "input4MIPs" ;
:contact = "ISMIP6 Steering Team ()" ;
:creation_date = "2020-12-07T15:45:54Z" ;
:data_specs_version = "01.00.31" ;
:dataset_category = "surfaceFluxes" ;
:external_variables = "areacellg" ;
:frequency = "yrC" ;
:further_info_url = "http://www.climate-cryosphere.org/wiki/index.php?title=ISMIP6_wiki_page" ;
:grid = "761x761 km lat x lon" ;
:grid_label = "gra" ;
:info = "The following original files were used from the CMIP6 archive to produce this dataset: tas_Amon_CNRM-CM6-1_historical_r1i1p1_185001-200512.nc, tas_Amon_CNRM-CM6-1-ssp585_r1i1p1_200501-210012.nc." ;
:institution_id = "NASA-GSFC" ;
:mip_era = "CMIP6" ;
:nominal_resolution = "10 km" ;
:product = "derived" ;
:realm = "landIce" ;
:references = "Experimental protocol for sealevel projections from ISMIP6 standalone ice sheet models, Nowicki, S. et al, 2020, https://doi.org/10.5194/tc-2019-322" ;
:region = "antarctica" ;
:release_year = "2020" ;
:source_description = "Ice sheet relevant datasets produced by the ISMIP6 Team for the standalone ice sheet experiment of ISMIP6" ;
:source_id = "CNRM-CM6-1-ssp585-1-0" ;
:source_type = "AOGCM" ;
:source_version = "1.0" ;
:table_id = "input4MIPs_LIyrC" ;
:table_info = "Creation Date:(20 November 2019) MD5:41ebd7b3592f0b5828f7ece8d5ae9677" ;
:target_mip = "ISMIP6" ;
:title = "ISMIP6 (CMIP6) - CNRM-CM6-1-ssp585-1-0 derived data prepared for input4MIPs" ;
:tracking_id = "hdl:21.14100/f4d322fc-4014-4637-a5f0-27dac421231e" ;
:variable_id = "sftflf" ;
:license = "CMIP6 model data produced by NASA-GSFC is licensed under a Creative Commons Attribution ShareAlike 4.0 International License (https://creativecommons.org/licenses/). Consult https://pcmdi.llnl.gov/CMIP6/TermsOfUse for terms of use governing CMIP6 output, including citation requiremenpr and proper acknowledgment. Further information about this data, including some limitations, can be found via the further_info_url (recorded as a global attribute in this file). The data producers and data providers make no warranty, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. All liabilities arising from the supply of the information (including any liability arising in negligence) are excluded to the fullest extent permitted by law." ;
:cmor_version = "3.6.0" ;
:comment = "Annual mask indicating when ice shelves should collapse because of excessive amounts of meltwater. In ISMIP6, ice shelves should collapse on January 1 when mask = 1. Dataset preparation steps: 1) Summer (DJF) CMIP5 model tas bias calculated and corrected with respect to RACMO2.3p2-ERA-Interim (27km) mean DJF t2m over 1995-2014; Temperature (tas) converted to meltwater fluxes using melt-temperature exponential function: melt=a*exp(b*tas), where a=1183, b=0.4557 (Trusel et al., 2015; Nature Geoscience; doi:10.1038/ngeo2563); regridded to RACMO2.2p2 27km grid from native CMIP5 model grid; land/ocean masked according to RACMO2.3p2 27km mask2d (ice mask) variable where mask2d > 0.5. 2) Ice shelf collapse mask estimated from surface meltwater, under the assumption that a period with 10 consecutive years with annual melt above 775 mm w.e. yr-1 results in collapse. Dataset prepared by L. Trusel and H. Seroussi." ;
}