[{"title":"ERA-Interim reanalysis data interpolated to Icebreaker Oden\u2019s position during the high-Arctic ASCOS expedition 2008","summary":"A subset of reanalysis data, interpolated to the Icebreaker Oden's position during the ASCOS expedition. ERA-Interim data is a reanalysis effort from the ECMWF (European Centre for Medium-Range Weather Forecasts) with an atmospheric model and assimilation system with a resolution of T255 (nominally 0.703125 degrees) and 60 vertical levels.","citations":"Tjernstr\u00f6m, M. et al. 2014. The Arctic Summer Cloud Ocean Study (ASCOS): overview and experimental design. Atmospheric Chemistry and Physics, 14, 2823\u20132869. DOI:10.5194\/acp-14-2823-2014","comments":"ERA-Interim is the to date latest reanalysis effort from the ECMWF (European Centre for Medium-Range Weather Forecasts) with an improved atmospheric model and assimilation system, replacing those used in ERA-40. Through systematic increases of computing power, 4-dimensional variational assimilation (4D-Var) became feasible and part of ECMWF operations since 1997, paving the way to ERA-Interim, rather than using the older 3D-Var concept. The resolution was also increased to T255 (nominally 0.703125 degrees) using the atmospheric model (IFS Cy31r1\/2) taking advantage of improved model physics. ERA-interim retains the same 60 model levels used for ERA-40 with the highest level being 0.1 hPa. In addition, ERA-Interim also benefits from improved quality control using variational bias correction of satellite radiance data, and more extensive use of radiances with an improved fast radiative transfer model.\nThe data stored here is a subset of data downloaded from the Research Data Archive (RDA) which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR); the original data are available from the\u00a0RDA in dataset number ds627.0 (NCAR is sponsored by the National Science Foundation, NSF). There are two files included:\nascos_ERAInt.nc\u00a0are the ERA-Interim pressure level and surface analysis files interpolated to the Oden\u2019s position.\nAscos_ERAInt_other.nc\u00a0are the ERA-Interim model forecast files interpolated to the Oden\u2019s position.\nAll interpolations are linear. Please note that several of the variables within the forecast files are not instantaneous values, but rather are accumulated over the simulation period.Original address: http:\/\/www.ascos.se\/index.php?q=node\/405\n\n\nFiles:\nascos_ERAInt_0.nc (379.6 KB)\nascos_ERAInt_other_0.nc (755.01 KB)\n\n","category":"Atmosphere","subcategory":"Reanalysis","keywords":"ASCOS; Meteorology; High Arctic; Arctic boundary layer; Arctic clouds; Meteorological model data","scientist":"Gijs deBoer","firstname":"Michael","lastname":"Tjernstr\u00f6m","address":"Department of Meteorology; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Arctic Summer Cloud-Ocean Study 2008 (Ascos)","publisher":"Bolin Centre Database","version":"1.0","constrains":"None","access":"Free"}]