HDF5 file, superblock version 0
group /
	attribute Conventions = "CF-1.2"
	attribute References = "https://www.psl.noaa.gov/data/gridded/data.20thC_ReanV3.html"
	attribute assimilation_algorithm = "Ensemble Kalman Filter with 4DIAU"
	attribute citation = (text block)
| Compo,G.P. <https://www.psl.noaa.gov/people/gilbert.p.compo>,
| J.S. Whitaker <https://www.psl.noaa.gov/people/jeffrey.s.whitaker>,
| P.D. Sardeshmukh, N.Matsui, R.J. Allan, X. Yin, B.E. Gleason, R.S. Vose,
| G. Rutledge, P. Bessemoulin, S. Bronnimann, M. Brunet, R.I. Crouthamel,
| A.N. Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshal,
| M. Maugeri, H.Y. Mok, O. Nordli, T.F. Ross, R.M. Trio, X.L. Wang,
| S.D. Woodruff, and S.J. Worley, 2011:  The Twentieth Century Reanalysis Project
| <http://onlinelibrary.wiley.com/doi/10.1002/qj.776/abstract>.
| Quarterly J. Roy. Meteorol. Soc./, 137, 1-28. DOI: 10.1002/qj.776.
	attribute citation1 = (text block)
| Slivinski, L. C, G. P. Compo, J. S. Whitaker,
| P. D. Sardeshmukh, B. S. Giese, C. McColl,
| R. Allan, X. Yin, R. Vose, H. Titchner,
| J. Kennedy, L. J. Spencer, L. Ashcroft,
| S. Bronnimann, M. Brunet, D. Camuffo, R. Cornes,
| T. A. Cram, R. Crouthamel, F. Dominguez-Castro,
| J. E. Freeman, J. Gergis, E. Hawkins, P. D. Jones,
| S. Jourdain, A. Kaplan, H. Kubota, F. Le Blancq,
| T.-C. Lee, A. Lorrey, J. Luterbacher, M. Maugeri,
| C. J. Mock, G.W. K. Moore, R. Przybylak,
| C. Pudmenzky, C. Reason, V. C. Slonosky,
| C. Smith, B. Tinz, B. Trewin,
| M. A. Valente, X. L. Wang, C. Wilkinson, K. Wood,
| and P. Wyszynski: Towards a more
| reliable historical reanalysis: Improvements for
| version 3 of the Twentieth Century Reanalysis System.
| Quarterly Journal of the Royal Meteorological Society.
|  2019; 145: 2876- 2908. doi:10.1002/qj.3598.
	attribute comments = "Data are from \nNOAA/CIRES/DOE 20th Century Reanalysis version 3\n(8x/day).  It consists of most variables interpolated to\npressure surfaces from model hybrid (sigma/pressure) surfaces."
	attribute contact = "psl.data@noaa.gov"
	attribute creation_date = "2019-03-19T22:59:26Z"
	attribute creator_name = "NOAA/PSL"
	attribute dataset_title = "NOAA/CIRES/DOE 20th Century Reanalysis (V3)"
	attribute forcing = (text block)
| CO2, Sl, Vl, SST, Oz (CO2 as in Saha et al (2010), Oz is prescribed from CMIP5, SST is SODAsi.3,
| Sl is Total Solar Irradiance (TSI) Reconstruction based on NRLTSI2, Vl defined as in Crowley & Unterman 2013)
	attribute forcing_note = "Additional information on the external forcings uses in this \nreanalysis can be found in Slivinski et al. (2019) (citation1)"
	attribute history = "created 2019/03 by Hoop (chunked, deflated non-packed netCDF4-Classic)\nesrl.psd.data@noaa.gov"
	attribute institution = "NOAA Physical Sciences Laboratory & CU/CIRES \n(325 Broadway R/PSL, Boulder, CO 80305)"
	attribute license = "These data are available free of charge under the PSD data policy"
	attribute name_of_model_used = "ensda_v451"
	attribute observations = "International Surface Pressure Databank version 4.7"
	attribute platform = "Model"
	attribute product = "reanalysis"
	attribute source = (text block)
| 20CRv3si 2018, Ensemble Kalman Filter, ocean (specified): SODAsi.3;
| atmosphere: NCEP GFS v14.0.1;
| sea ice (specified): HadISST2.3
| (years prior to 1850 use climatology of 1860-1891);
| land: Noah 4 layer version 2
	attribute spatial_resolution = "1.0 degree"
	attribute standard_name_vocabulary = "NetCDF Climate and Forecast (CF) Metadata Convention"
	attribute title = "mean Daily NOAA/CIRES/DOE 20th Century Reanalysis V3"
	attribute version = "3si"
dataset /lat: float32, shape (181)
	attribute actual_range = 90.0, -90.0
	attribute axis = "Y"
	attribute coordinate_defines = "point"
	attribute long_name = "Latitude"
	attribute standard_name = "latitude"
	attribute units = "degrees_north"
// lat: first -90.0, last 90.0, count 181
dataset /lon: float32, shape (360)
	attribute actual_range = 0.0, 359.0
	attribute axis = "X"
	attribute coordinate_defines = "point"
	attribute long_name = "Longitude"
	attribute standard_name = "longitude"
	attribute units = "degrees_east"
// lon: first 0.0, last 359.0, count 360
dataset /nbnds: float32, shape (2)
dataset /time: float64, shape (365)
	attribute actual_range = 937920.0, 946656.0
	attribute avg_period = "0000-00-01 00:00:00"
	attribute axis = "T"
	attribute coordinate_defines = "start"
	attribute delta_t = "0000-00-01 00:00:00"
	attribute long_name = "Time"
	attribute standard_name = "time"
	attribute units = "hours since 1800-1-1 00:00:0.0"
dataset /time_bnds: float64, shape (365, 2)
dataset /weasd: float32, shape (365, 181, 360)
	attribute GRIB_name = "WEASD"
	attribute GridType = "Cylindrical Equidistant Projection Grid"
	attribute actual_range = 0.0, 88.3349991
	attribute dataset = "NOAA/CIRES/DOE 20th Century Reanalysis version 3si Daily Averages"
	attribute datum = "wgs84"
	attribute level_desc = "Surface"
	attribute long_name = "daily mean 3-hourly Water Equiv. of Accum. Snow Depth spread at surface"
	attribute missing_value = -9.96920997e+36
	attribute parent_stat = "Individual Obs"
	attribute standard_name = "surface_snow_amount"
	attribute statistic = "Spread Mean"
	attribute statistic_method = "Ensemble spread calculated by taking standard deviation of the 80 ensemble members at each time step"
	attribute units = "kg/m^2"
	attribute valid_range = 0.0, 10000.0
	attribute var_desc = "Water Equiv. of Accum. Snow Depth"