netcdf Liquid_water_tropAtl_EURECAv092_1_1051727208641715969 {
dimensions:
time = 33219 ;
variables:
double time(time) ;
time:units = "seconds since 1970-01-01 00:00:00" ;
time:long_name = "time" ;
time:calendar = "gregorian" ;
byte status_flag(time) ;
status_flag:long_name = "Ice and LWP-clipping flags" ;
status_flag:standard_name = "status_flag" ;
status_flag:valid_range = 0b, 15b ;
status_flag:flag_masks = 1b, 2b, 4b, 8b ;
status_flag:flag_meanings = "outside_study_area frozen_precipitation lwp_out_of_valid_range rwp_out_of_valid_range" ;
status_flag:comment = "outside_study_area: HALO is flying outside the tropics, north of 20N.\nfrozen_precipitation: \'Ice flag\' indicating presence of microwave-scattering (precipitating) ice particles.\nlwp_out_of_valid_range: LWP is above 1 kg/m2, LWP and IWV are ambiguous for these cases.\nrwp_out_of_valid_range: Too much rain (RWP/LWP fraction is retrieved as > 1.)" ;
status_flag:source = "HAMP radar, HAMP radiometer, BAHAMAS" ;
float iwv(time) ;
iwv:_FillValue = -999.f ;
iwv:units = "kg/m2" ;
iwv:long_name = "retrieved column integrated water vapor, also called precipitable water content" ;
iwv:standard_name = "atmosphere_mass_content_of_water_vapor" ;
iwv:ancillary_variables = "status_flag iwv_standard_error" ;
iwv:source = "HAMP radiometer" ;
float lwp(time) ;
lwp:_FillValue = -999.f ;
lwp:units = "kg/m2" ;
lwp:long_name = "retrieved column integrated liquid water with offset correction" ;
lwp:ancillary_variables = "status_flag lwp_standard_error" ;
lwp:comment = "WALES backscatter cloud mask was used to correct slow LWP drifts" ;
lwp:source = "HAMP radiometer, WALES backscatter lidar" ;
float lwp_uc(time) ;
lwp_uc:_FillValue = -999.f ;
lwp_uc:units = "kg/m2" ;
lwp_uc:long_name = "retrieved column integrated liquid water without offset correction" ;
lwp_uc:ancillary_variables = "status_flag lwp_standard_error" ;
lwp_uc:source = "HAMP radiometer" ;
float rwp(time) ;
rwp:_FillValue = -999.f ;
rwp:units = "kg/m2" ;
rwp:long_name = "retrieved column integrated rain water derived from lwp_uc" ;
rwp:ancillary_variables = "status_flag" ;
rwp:source = "HAMP radar, HAMP radiometer" ;
float lon(time) ;
lon:_FillValue = -999.f ;
lon:units = "degrees_east" ;
lon:long_name = "longitude of the platform position" ;
lon:standard_name = "longitude" ;
lon:valid_range = -180.f, 180.f ;
lon:source = "BAHAMAS" ;
float lat(time) ;
lat:_FillValue = -999.f ;
lat:units = "degrees_north" ;
lat:long_name = "latitude of the platform position" ;
lat:standard_name = "latitude" ;
lat:valid_range = -90.f, 90.f ;
lat:source = "BAHAMAS" ;
float zsl(time) ;
zsl:_FillValue = -999.f ;
zsl:units = "m" ;
zsl:positive = "up" ;
zsl:long_name = "altitude of the platform above geoid" ;
zsl:standard_name = "altitude" ;
zsl:source = "BAHAMAS" ;
float lwp_standard_error(time) ;
lwp_standard_error:_FillValue = -999.f ;
lwp_standard_error:units = "kg/m2" ;
lwp_standard_error:long_name = "root-mean-square error of LWP retrieval" ;
float iwv_standard_error ;
iwv_standard_error:_FillValue = -999.f ;
iwv_standard_error:units = "kg/m2" ;
iwv_standard_error:long_name = "root-mean-square error of IWV retrieval" ;
iwv_standard_error:standard_name = "atmosphere_mass_content_of_water_vapor standard_error" ;
// global attributes:
:author = "Jacob, Marek" ;
:institution = "Institute for Geophysics and Meteorology, University of Cologne" ;
:contact = "marek.jacob (at) uni-koeln (dot) de" ;
:Conventions = "CF-1.7" ;
:title = "Liquid water path and integrated water vapor over the tropical Atlantic during EUREC4A" ;
:source = "HAMP and WALES observations" ;
:history = "2021-05-20 11:34:01.720262 UTC: created" ;
:comment = "Retrieval output where status_flag > 0 should be avoided. Time steps are the same as in the unified HAMP data referenced in source. As the retrieval is only valid for the tropics, data north of 20N is masked, but the time steps are kept for compatibility with the unified HAMP data." ;
}