求助！grib2.nc格式的FNL资料里各个变量到底如何解读？

Nicole

前段时间下载了一个grib2.nc格式的FNL资料，但是里面的变量不知道是啥意思，特别是同一个变量但不知道哪个是哪一层的。求大神帮忙解释一下！


File 1 : NCL: convert-GRIB-to-netCDF
  Descriptor: F:\fnl202005\fnl_20200501_00_00.grib2.nc
  Binary: F:\fnl202005\fnl_20200501_00_00.grib2.nc
  Type = Gridded
  Xsize = 360  Ysize = 181  Zsize = 24  Tsize = 1  Esize = 1
  Number of Variables = 79
     tmp_p0_l1_gll0  0  y,x  Temperature
     tmp_p0_l6_gll0  0  y,x  Temperature
     tmp_p0_l7_gll0  0  y,x  Temperature
     tmp_p0_l104_gll  0  y,x  Temperature
     tmp_p0_2l108_gl  0  y,x  Temperature
     pot_p0_l104_gll  0  y,x  Potential temperature
     dpt_p0_l103_gll  0  y,x  Dew point temperature
     aptmp_p0_l103_g  0  y,x  Apparent temperature
     spfh_p0_2l108_g  0  y,x  Specific humidity
     rh_p0_l4_gll0  0  y,x  Relative humidity
     rh_p0_l103_gll0  0  y,x  Relative humidity
     rh_p0_l104_gll0  0  y,x  Relative humidity
     rh_p0_2l108_gll  0  y,x  Relative humidity
     rh_p0_l200_gll0  0  y,x  Relative humidity
     rh_p0_l204_gll0  0  y,x  Relative humidity
     pwat_p0_l200_gl  0  y,x  Precipitable water
     prate_p0_l1_gll  0  y,x  Precipitation rate
     snod_p0_l1_gll0  0  y,x  Snow depth
     weasd_p0_l1_gll  0  y,x  Water equivalent of accumulated snow depth
     clwmr_p0_l105_g  0  y,x  Cloud mixing ratio
     icmr_p0_l105_gl  0  y,x  Ice water mixing ratio
     rwmr_p0_l105_gl  0  y,x  Rain mixing ratio
     snmr_p0_l105_gl  0  y,x  Snow mixing ratio
     grle_p0_l105_gl  0  y,x  Graupel
     cpofp_p0_l1_gll  0  y,x  Percent frozen precipitation
     crain_p0_l1_gll  0  y,x  Categorical rain (yes=1; no=0)
     cfrzr_p0_l1_gll  0  y,x  Categorical freezing rain (yes=1; no=0)
     cicep_p0_l1_gll  0  y,x  Categorical ice pellets (yes=1; no=0)
     csnow_p0_l1_gll  0  y,x  Categorical snow (yes=1; no=0)
     ugrd_p0_l6_gll0  0  y,x  U-component of wind
     ugrd_p0_l7_gll0  0  y,x  U-component of wind
     ugrd_p0_l104_gl  0  y,x  U-component of wind
     ugrd_p0_2l108_g  0  y,x  U-component of wind
     ugrd_p0_l220_gl  0  y,x  U-component of wind
     vgrd_p0_l6_gll0  0  y,x  V-component of wind
     vgrd_p0_l7_gll0  0  y,x  V-component of wind
     vgrd_p0_l104_gl  0  y,x  V-component of wind
     vgrd_p0_2l108_g  0  y,x  V-component of wind
     vgrd_p0_l220_gl  0  y,x  V-component of wind
     vvel_p0_l104_gl  0  y,x  Vertical velocity (pressure)
     gust_p0_l1_gll0  0  y,x  Wind speed (gust)
     vwsh_p0_l7_gll0  0  y,x  Vertical speed shear
     ustm_p0_2l103_g  0  y,x  U-component storm motion
     vstm_p0_2l103_g  0  y,x  V-component storm motion
     vrate_p0_l220_g  0  y,x  Ventilation rate
     pres_p0_l1_gll0  0  y,x  Pressure
     pres_p0_l6_gll0  0  y,x  Pressure
     pres_p0_l7_gll0  0  y,x  Pressure
     pres_p0_l103_gl  0  y,x  Pressure
     prmsl_p0_l101_g  0  y,x  Pressure reduced to MSL
     icaht_p0_l6_gll  0  y,x  ICAO standard atmosphere reference height
     icaht_p0_l7_gll  0  y,x  ICAO standard atmosphere reference height
     hgt_p0_l1_gll0  0  y,x  Geopotential height
     hgt_p0_l4_gll0  0  y,x  Geopotential height
     hgt_p0_l6_gll0  0  y,x  Geopotential height
     hgt_p0_l7_gll0  0  y,x  Geopotential height
     hgt_p0_l204_gll  0  y,x  Geopotential height
     mslet_p0_l101_g  0  y,x  MSLP (ETA model reduction)
     5wavh_p0_l100_g  0  y,x  5-wave geopotential height
     hpbl_p0_l1_gll0  0  y,x  Planetary boundary layer height
     plpl_p0_2l108_g  0  y,x  Pressure of level from which parcel was lifted
     cwat_p0_l200_gl  0  y,x  Cloud water
     sunsd_p0_l1_gll  0  y,x  Sunshine duration
     cape_p0_l1_gll0  0  y,x  Convective available potential energy
     cin_p0_l1_gll0  0  y,x  Convective inhibition
     hlcy_p0_2l103_g  0  y,x  Storm relative helicity
     lftx_p0_l1_gll0  0  y,x  Surface lifted index
     4lftx_p0_l1_gll  0  y,x  Best (4 layer) lifted index
     tozne_p0_l200_g  0  y,x  Total ozone
     o3mr_p0_l100_gl  24  z,y,x  Ozone mixing ratio
     refc_p0_l10_gll  0  y,x  Composite reflectivity
     vis_p0_l1_gll0  0  y,x  Visibility
     land_p0_l1_gll0  0  y,x  Land cover (1=land, 0=sea)
     wilt_p0_l1_gll0  0  y,x  Wilting point
     landn_p0_l1_gll  0  y,x  Land-sea coverage (nearest neighbor) [land=1,sea=0]
     fldcp_p0_l1_gll  0  y,x  Field capacity
     hindex_p0_l1_gl  0  y,x  Haines index
     icec_p0_l1_gll0  0  y,x  Ice cover
     iceg_p0_l102_gl  0  y,x  Ice growth rate

river

你用GrADS生成描述文件以后，打开看看，应该比这个详细吧感觉。是在不行在下载的网站上看看有没有更详细的说明

Nicole

river 发表于 2020-11-28 10:47
你用GrADS生成描述文件以后，打开看看，应该比这个详细吧感觉。是在不行在下载的网站上看看有没有更详细的 ...

感谢您的回答！这个文件里的内容就是在grads里直接用querry命令查出来的，跟grads生成的描述文件应该是一样的？

river

Nicole 发表于 2020-12-7 11:56
感谢您的回答！这个文件里的内容就是在grads里直接用querry命令查出来的，跟grads生成的描述文件应该是一 ...

应该是一致的。你看我这个，我感觉更详细一些。
RH2m   0,103,2   0,1,1 ** 2 m above ground Relative Humidity [%]
RHsg330_1000  0,104,0.33,1   0,1,1 ** 0.33-1 sigma layer Relative Humidity [%]
RHsg440_1000  0,104,0.44,1   0,1,1 ** 0.44-1 sigma layer Relative Humidity [%]
RHsg720_940  0,104,0.72,0.94   0,1,1 ** 0.72-0.94 sigma layer Relative Humidity [%]
RHsg440_720  0,104,0.44,0.72   0,1,1 ** 0.44-0.72 sigma layer Relative Humidity [%]
RHsig995   0,104,0.995   0,1,1 ** 0.995 sigma level Relative Humidity [%]
RH30_0mb  0,108,3000,0   0,1,1 ** 30-0 mb above ground Relative Humidity [%]
RHclm   0,200,0   0,1,1 ** entire atmosphere (considered as a single layer) Relative Humidity [%]
RHtop0C   0,204,0   0,1,1 ** highest tropospheric freezing level Relative Humidity [%]
RH0C   0,4,0   0,1,1 ** 0C isotherm Relative Humidity [%]
SNODsfc   0,1,0   0,1,11 ** surface Snow Depth [m]
SOILW0_10cm  0,106,0,0.1   2,0,192 ** 0-0.1 m below ground Volumetric Soil Moisture Content [Fraction]
SOILW10_40cm  0,106,0.1,0.4   2,0,192 ** 0.1-0.4 m below ground Volumetric Soil Moisture Content [Fraction]
SOILW40_100cm  0,106,0.4,1   2,0,192 ** 0.4-1 m below ground Volumetric Soil Moisture Content [Fraction]
SOILW100_200cm  0,106,1,2   2,0,192 ** 1-2 m below ground Volumetric Soil Moisture Content [Fraction]
SPFH2m   0,103,2   0,1,0 ** 2 m above ground Specific Humidity [kg/kg]
SPFH80m   0,103,80   0,1,0 ** 80 m above ground Specific Humidity [kg/kg]
SPFH30_0mb  0,108,3000,0   0,1,0 ** 30-0 mb above ground Specific Humidity [kg/kg]
SUNSDsfc   0,1,0   0,6,201 ** surface Sunshine Duration
TMPsfc   0,1,0   0,0,0 ** surface Temperature [K]
TMPprs    26,100  0,0,0 ** (1000 975 950 925 900.. 70 50 30 20 10) Temperature [K]
TMP_1829m   0,102,1829   0,0,0 ** 1829 m above mean sea level Temperature [K]
TMP_2743m   0,102,2743   0,0,0 ** 2743 m above mean sea level Temperature [K]
TMP_3658m   0,102,3658   0,0,0 ** 3658 m above mean sea level Temperature [K]
TMP2m   0,103,2   0,0,0 ** 2 m above ground Temperature [K]
TMP80m   0,103,80   0,0,0 ** 80 m above ground Temperature [K]
TMP100m   0,103,100   0,0,0 ** 100 m above ground Temperature [K]
TMPsig995   0,104,0.995   0,0,0 ** 0.995 sigma level Temperature [K]
TMP30_0mb  0,108,3000,0   0,0,0 ** 30-0 mb above ground Temperature [K]
TMP2pv   0,109,2e-06   0,0,0 ** PV=2e-06 (Km^2/kg/s) surface Temperature [K]
TMPneg2pv   0,109,-2e-06   0,0,0 ** PV=-2e-06 (Km^2/kg/s) surface Temperature [K]
TMPmwl   0,6,0   0,0,0 ** max wind Temperature [K]
TMPtrop   0,7,0   0,0,0 ** tropopause Temperature [K]
TOZNEclm   0,200,0   0,14,0 ** entire atmosphere (considered as a single layer) Total Ozone [DU]
TSOIL0_10cm  0,106,0,0.1   2,0,2 ** 0-0.1 m below ground Soil Temperature    Validation to deprecate [K]
TSOIL10_40cm  0,106,0.1,0.4   2,0,2 ** 0.1-0.4 m below ground Soil Temperature    Validation to deprecate [K]
TSOIL40_100cm  0,106,0.4,1   2,0,2 ** 0.4-1 m below ground Soil Temperature    Validation to deprecate [K]
TSOIL100_200cm  0,106,1,2   2,0,2 ** 1-2 m below ground Soil Temperature    Validation to deprecate [K]
UGRDprs    26,100  0,2,2 ** (1000 975 950 925 900.. 70 50 30 20 10) U-Component of Wind [m/s]
UGRD_1829m   0,102,1829   0,2,2 ** 1829 m above mean sea level U-Component of Wind [m/s]
UGRD_2743m   0,102,2743   0,2,2 ** 2743 m above mean sea level U-Component of Wind [m/s]
UGRD_3658m   0,102,3658   0,2,2 ** 3658 m above mean sea level U-Component of Wind [m/s]
UGRD10m   0,103,10   0,2,2 ** 10 m above ground U-Component of Wind [m/s]
UGRD80m   0,103,80   0,2,2 ** 80 m above ground U-Component of Wind [m/s]
UGRD100m   0,103,100   0,2,2 ** 100 m above ground U-Component of Wind [m/s]
UGRDsig995   0,104,0.995   0,2,2 ** 0.995 sigma level U-Component of Wind [m/s]
UGRD30_0mb  0,108,3000,0   0,2,2 ** 30-0 mb above ground U-Component of Wind [m/s]
UGRD2pv   0,109,2e-06   0,2,2 ** PV=2e-06 (Km^2/kg/s) surface U-Component of Wind [m/s]
UGRDneg2pv   0,109,-2e-06   0,2,2 ** PV=-2e-06 (Km^2/kg/s) surface U-Component of Wind [m/s]
UGRDpbl   0,220,0   0,2,2 ** planetary boundary layer U-Component of Wind [m/s]
UGRDmwl   0,6,0   0,2,2 ** max wind U-Component of Wind [m/s]
UGRDtrop   0,7,0   0,2,2 ** tropopause U-Component of Wind [m/s]
USTM6000_0m  0,103,6000,0   0,2,194 ** 6000-0 m above ground U-Component Storm Motion [m/s]
VGRDprs    26,100  0,2,3 ** (1000 975 950 925 900.. 70 50 30 20 10) V-Component of Wind [m/s]
VGRD_1829m   0,102,1829   0,2,3 ** 1829 m above mean sea level V-Component of Wind [m/s]
VGRD_2743m   0,102,2743   0,2,3 ** 2743 m above mean sea level V-Component of Wind [m/s]
VGRD_3658m   0,102,3658   0,2,3 ** 3658 m above mean sea level V-Component of Wind [m/s]
VGRD10m   0,103,10   0,2,3 ** 10 m above ground V-Component of Wind [m/s]
VGRD80m   0,103,80   0,2,3 ** 80 m above ground V-Component of Wind [m/s]
VGRD100m   0,103,100   0,2,3 ** 100 m above ground V-Component of Wind [m/s]
VGRDsig995   0,104,0.995   0,2,3 ** 0.995 sigma level V-Component of Wind [m/s]
VGRD30_0mb  0,108,3000,0   0,2,3 ** 30-0 mb above ground V-Component of Wind [m/s]
VGRD2pv   0,109,2e-06   0,2,3 ** PV=2e-06 (Km^2/kg/s) surface V-Component of Wind [m/s]
VGRDneg2pv   0,109,-2e-06   0,2,3 ** PV=-2e-06 (Km^2/kg/s) surface V-Component of Wind [m/s]
VGRDpbl   0,220,0   0,2,3 ** planetary boundary layer V-Component of Wind [m/s]
VGRDmwl   0,6,0   0,2,3 ** max wind V-Component of Wind [m/s]
VGRDtrop   0,7,0   0,2,3 ** tropopause V-Component of Wind [m/s]
VRATEpbl   0,220,0   0,2,224 ** planetary boundary layer Ventilation Rate [m^2/s]
VSTM6000_0m  0,103,6000,0   0,2,195 ** 6000-0 m above ground V-Component Storm Motion [m/s]
VVELprs    21,100  0,2,8 ** (1000 975 950 925 900.. 300 250 200 150 100) Vertical Velocity (Pressure) [Pa/s]
VVELsig995   0,104,0.995   0,2,8 ** 0.995 sigma level Vertical Velocity (Pressure) [Pa/s]
VWSH2pv   0,109,2e-06   0,2,192 ** PV=2e-06 (Km^2/kg/s) surface Vertical Speed Shear [1/s]
VWSHneg2pv   0,109,-2e-06   0,2,192 ** PV=-2e-06 (Km^2/kg/s) surface Vertical Speed Shear [1/s]
VWSHtrop   0,7,0   0,2,192 ** tropopause Vertical Speed Shear [1/s]
WEASDsfc   0,1,0   0,1,13 ** surface Water Equivalent of Accumulated Snow Depth [kg/m^2]
WILTsfc   0,1,0   2,0,201 ** surface Wilting Point [Fraction]
var00212m   0,103,2   0,0,21 ** 2 m above ground desc [unit]

Nicole

river 发表于 2020-12-7 12:12
应该是一致的。你看我这个，我感觉更详细一些。
RH2m   0,103,2   0,1,1 ** 2 m above ground Relative  ...

好的！谢谢~{:eb511:}

JIU

怎么处理，没法直接画图呀

Nicole

JIU 发表于 2021-1-21 08:42
怎么处理，没法直接画图呀

可以直接画呀，下载下来已经是nc格式了，设置好然后d就可以了