==== Description ==== The atmospheric initial conditions are generated with OpenIFS using the FULLPOS system which is a physical interpolation that takes into account the model definitions. The initial conditions are currently generated from ERA5 reanalysis. The members (e.g. fc1-fc9) are generated from the official member fc0, by applying reproducible random perturbations of the 3D temperature field. At BSC, the initial conditions are available in the following folder: /esarchive/releases/ic/atmos/[resol]/[exp]/ Scripts to download and interpolate these fields can be retrieved from https://earth.bsc.es/gitlab/cp/ifs_initial_forcing.git ==== Old Description (before 2021) ==== The atmospheric initial conditions are generated with the IFS code at ECMWF using the FULLPOS system which is a physical interpolation that takes into account the model definitions. The initial conditions are currently generated from ERA-Interim and ERA40, while the surface parameters are replaced in some ICs with the ERA-Land analysis. The ERA-Land analysis is forced by bias-corrected input and represent the surface variables more accurate than ERA-Interim. The members are generated using singular vectors (SV-Pert) or with random perturbations of the SST (SST-Pert). At BSC, the initial conditions are available in the following folder: /esarchive/releases/ic/atmos/[resol]/[exp]/ ==== T159L62 ==== ^ ID^ ANALYSIS^ GRID^ FIRST^ LAST^ INTERVAL (MONTH)^ MEMBERS^ METHOD | | b07n| ERA-Interim | T159L62| 19600201| 20110801| 02,05,08,11| fc0 - fc9 | SV-Pert | | b0nq| ERA-Interim| T159L62| 20130201| 20141101| 02,05,08,11| fc0 - fc9 | SV-Pert | | b0p4 | ERA-Interim | T159L62| 19800201| 20151031| 02,05,06,08,10,11 | fc0 - fc19 | SV-Pert | | b0qa | ERA-Interim + ERA-Land analysis | T159L62| 19790201| 20151101| 02,05,08,11 | fc0 - fc9 | SST-Pert | | b0q8 | ERA40 | T159L62| 19600201| 19781101| 02,05,08,11 | fc0 - fc9 | SST-Pert | | b0q9 | ERA-Interim | T159L62| 19790201| 20170501| 02,05,08,11 | fc0 - fc9 | SST-Pert | | b0rf | ERA-Interim | T159L62| 20170801| 20171101| 08,11 | fc0 - fc9 | SST pert | | b0so | ERA-Interim | T159L62| 20180201| 20181101| 02,05,08,11 | fc0 - fc29 | SST pert | ==== T255L91/62 ==== ^ ID^ COMPONENT^ GRID^ FIRST^ LAST^ INTERVAL (MONTH)^ MEMBERS^ METHOD | | b0p6 | ERA-Interim | T255L91| 19800201| 20151101| 02,06,10 | fc0 - fc19 | SV-Pert | | b0oo | ERA-Interim | T255L91| 19800201| 20140201| 02| fc0 - fc9 | SV-Pert | | b0p2 | ERA-Interim | T255L91| 20150201| 20150201| 02| fc0 - fc99 | SV-Pert | | b0p9 | ERA-Interim | T255L91| 19800101| 20100101| 01| fc0 - fc9 | SV-Pert | | b0pc | ERA-Interim | T255L91| 20150101| 20150101| 01| fc0 - fc99 | SV-Pert | | b0ga| ERA-Interim| T255L62| 19790801| 20101101| 02,05,08,11| fc0 - fc9 | NOT IN ESNAS? | | i05e| ERA-Interim + ERA-Land analysis| T255L91| 19930501| 20091101| 05,11| fc0 - fc9 | SV-Pert | | i070 | ERA-Interim + ERA-Land analysis forced by WFDEI | T255L91 | 19930501| 20091101| 05,11| fc0 - fc9 | SV-Pert | | b0io| ERA-Interim| T255L91| 19930501| 20091101| 05,11| fc0 - fc9 | SV-Pert | | b0q0 | ERA-Interim + ERA-Land analysis (gbg4) | T255L91| 19790201| 20171101| 02,05,08,11 | fc0 - fc9 | 3D T-Pert (SST-Pert on ECFS) | | a1tz | ERA-Interim + ERA-Land analysis | T255L91| 19790201| 20181101| 01,02,05,08,11 | fc0 | no pert (must use auto-ecearth3) | | b0q3 | ERA-Interim | T255L91| 19790201| 20151101| 02,05,08,11 | fc0 - fc9 | 3D T-Pert (SST-Pert on ECFS) | | b0q5 | ERA40 | T255L91| 19600201| 19781101| 11 | fc0 - fc9 | 3D T-Pert (SST-Pert on ECFS) | | b0rt | ERA-Interim | T255L91| 20160201| 20171101| 02,05,08,11 | fc0 - fc9 | 3D T-Pert | | b0ro | ERA-Interim + ERA-Land analysis | T255L91| 20180201| 20181101| 02,05,08,11 | fc0 - fc9 | SST-Pert | | official_repro | AMIP | T255L91| 19500101| 19500101| --- | fc0 - fc4 | 3D T-Pert | | a2k7 | ERA5| T255L91| 19590101| 20191101| 01,02,05,08,11 | fc00 -fc01 | no pert (must use auto-ecearth3), ERA5-BE (1959-1978) links to a543 | | cmip6dcpp | ERA40 (b0q5, 1960-1978) / ERA-Interim (b0q0,1979-2017) / ERA5 (a2k7,2018-2020) | T255L91| 19790101| 20191101| 11 | fc00 -fc09 | 3D T-Pert | | a3p3 | ERA5-BE preliminary | T255L91| 19600101| 19781101| 01,02,05,08,11 | fc00 -fc01 | no pert (must use auto-ecearth3) | | a543 | ERA5-BE final | T255L91| 19590101| 19781101| 01,02,05,08,11 | fc00 -fc01 | no pert (must use auto-ecearth3), needs update once 1940-1957 is released | ==== T511L91 ==== ^ ID^ COMPONENT^ GRID^ FIRST^ LAST^ INTERVAL (MONTH)^ MEMBERS^ METHOD | | prim | ERA-Interim + ERA-Land climatology (1981-2010) | T511L91| 19500101| 19500101| 01 | fc0 | SV-Pert | | b0q6 | ERA40 | T511L91| 19600201| 19781101| 02,05,08,11 | fc0 - fc9 | SST-Pert (empty files on /esarchive) | | b0it | ERA-Interim| T511L91 | 19920501| 20091101| 05,11| fc0 - fc9 | SV-Pert | | b0q4 | ERA-Interim | T511L91| 19790201| 20151101| 02,05,08,11 | fc0 - fc9 | SST-Pert / 3D T-Pert | | b0r3 | ERA-Interim | T511L91| 20160201| 20171101 | 02,05,08,11 | fc0 - fc9 | 3D T-Pert | | b0ru | ERA-Interim | T511L91| 20180201| 20181101 | 02,05,08,11 | fc0 - fc9 | SST Pert | | b0rp | ERA-Interim + ERA-Land analysis | T511L91| 20180201| 20181101| 02,05,08,11 | fc0 - fc9 | SST Pert | | i05f | ERA-Interim + ERA-Land analysis | T511L91| 19930501| 20091101| 05,11| fc0 - fc9 | SV-Pert | | b0q2 | ERA-Interim + ERA-Land analysis | T511L91| 19790201| 20171101| 02,05,08,11 | fc0 - fc9 | 3D T-Pert | | a1uc | ERA-Interim + ERA-Land analysis (gbg6) | T511L91| 19790101| 20181101| 01,02,05,08,11 | fc00 -fc01 | no pert (must use auto-ecearth3) | | a2ym | ERA5-HRES| T511L91| 19500101| 20211101| 01,02,05,08,11 | fc0 - fc1 | use auto-ecearth3 | ==== T1279L91 ==== ^ ID^ COMPONENT^ GRID^ FIRST^ LAST^ INTERVAL (MONTH)^ MEMBERS^ METHOD | | b0pr | ERA-Interim | T1279L91| 20050101| 20060101| 01 | fc0 | | ==== Need for atmospheric initial conditions ==== Add here any needs on initial conditions: ==== Current problems to generate intial conditions ==== 1) ERA-Land conditions are only available until 20160831. 2) ERA-Land conditions are only available after 1980, conditions prior to this date can not be produced currently. ==== EC-Earth CPWG wiki ==== There is additional information produced for the EC-Earth CP Working Group (CPWG) https://dev.ec-earth.org/projects/ecearth3/wiki/Atmospheric_initial_conditions_for_climate_predictions https://dev.ec-earth.org/projects/ecearth3/wiki/Ocean_initial_conditions_for_climate_predictions https://dev.ec-earth.org/projects/ecearth3/wiki/Sea_ice_initial_conditions_for_climate_predictions ==== IC/nudging file generation howtos ==== https://earth.bsc.es/wiki/doku.php?id=ic_ifs&s[]=%2Aprepifs%2A https://earth.bsc.es/wiki/doku.php?id=nudging_ifs&s[]=%2Aprepifs%2A