Hi,
I am downloading and calculating climate anomalies for point locations using maximum temperature and precipitation amount for E-obs daily gridded meterological data.
While this works fine for temperature I am confused about the data structure of precipitation. Although the manual says that precipitation amount should be given in mm as ,,...Total daily amount of rain, snow and hail measured as the height of the equivalent liquid water in a square meter..."
the data I get is clearly precipitation rate in m/s!
Here is my retrieval and aggregation code:
data = ct.catalogue.retrieve(
'insitu-gridded-observations-europe',
{
'variable': [
'precipitation_amount'
],
'product_type': 'ensemble_mean',
'grid_resolution': '0.25deg',
'period': '2011_2020',
'version': '22.0e',
}
)
monthly=ct.cube.resample(data, freq='month', how='sum')
data = ct.catalogue.retrieve(
'insitu-gridded-observations-europe',
{
'variable': [
'precipitation_amount'
],
'product_type': 'ensemble_mean',
'grid_resolution': '0.25deg',
'period': '2011_2020',
'version': '22.0e',
}
)
Here is the data structure of my netcdf.file
netcdf file:/C:/Users/janpeter/Downloads/925bb0ce-4d95-40d2-95ba-c9e1f99f9de1.nc { dimensions: time = 114; obs = 389; variables: long month(time=114);double time(time=114); :_FillValue = NaN; // double double lon(obs=389); :_FillValue = NaN; // double double data(obs=389, time=114); :_FillValue = NaN; // double :units = "m s-1"; :long_name = "Total precipitation rate anomaly"; :standard_name = "lwe_precipitation_rate_anomaly"; :cds_magics_style_name = "precipitation-rate"; :type = "real"; :coordinates = "month lon lat"; double lat(obs=389); :_FillValue = NaN; // double// global attributes:
:E-OBS_version = “22.0e”;
:Conventions = “CF-1.4”;
:References = “E-OBS data access”;
:history = “Mon Nov 30 14:19:50 2020: ncks --no-abc -d time,22280,25748 /data2/Else/EOBSv22.0e/Grid_0.25deg/rr//rr_ensmean_master_rectime.nc /data2/Else/EOBSv22.0e/Grid_0.25deg/rr//rr_ens_mean_0.25deg_reg_2011-2020_v22.0e.nc\nMon Nov 30 14:18:49 2020: ncks --no-abc --mk_rec_dmn time /data2/Else/EOBSv22.0e/Grid_0.25deg/rr//rr_ensmean_master.nc /data2/Else/EOBSv22.0e/Grid_0.25deg/rr//rr_ensmean_master_rectime.nc”;
:NCO = “netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = GitHub - nco/nco: netCDF Operators)”;
:source = “INSITU-EOBS”;
}