DATA ACCESS

Product Description Document of Today’s Earth

This document states the basic information of Today’s Earth (TE). The results show the performance of the TE products and their limitation as well; the users of the TE products are required to comprehend both of them.

Product Description of Today’s Earth
(version 2024/07/02)

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Versions of Today’s Earth

Experiment Coverage Spatial resolution Temporal resolution Period Publication period Latency Forcing
TE-Global JRA-55 ver. (baseline) Global 0.5-deg. (land)
0.25-deg. (river)		 3-hourly,
daily,
monthly		 1958-2023 3-hourly: For the last 13 month
daily: For the last 10 year
monthly: All
 Update stopped Surface meteorological parameters by JRA-55
GSMaP ver. 2001 - 2023 Update stopped Same as JRA-55 ver. except rainfall from GSMaP
MODIS ver. 2003 - 2023 Update stopped Same as JRA-55 ver. except solar radiation from MODIS
TE-Global NEXRA -- Global 0.5-deg. (land)
0.25-deg. (river)		 3-hourly,
daily,
monthly		 2019-present 3-hourly: For the last 13 month
daily: For the last 10 year
monthly: All
 About 1~5 days NEXRA (NICAM-LETKF JAXA Research Analysis)
TE-Japan MSM/GPV ver. Japan 1/60-deg. hourly,
daily,
monthly		 2007-present hourly: For the last 13 month
daily: For the last 10 year
monthly: All
 Realtime Surface meteorological parameters by MSM/GPV
Satellite ver. 2015-2023 Update stopped Surface meteorological parameters by MSM/GPV except solar radiation from Himawar-8

Variable list of Today’s Earth

Model/CategoryVariable nameItem nameUnit
(netCDF)		PNGMap Viewer
ForcingrainfallGPRCTkg/m2/s
snowfallGSNWLkg/m2/s
-
eastward wind*8GDUm/s--
northward wind*8GDVm/s--
surface air temperatureGDTK
specific humidityGDQkg/kg
-
surface shortwave radiation (downward)SSRDW/m2
-
surface longwave radiation (downward)SLRDW/m2--
surface air pressure*8GDPShPa--
MATSIROWater balance (State)soil moisture (at each level) [Z1-Z6]*1GLWm/m
[Z1]
[Z1]
soil moisture (total volume)GLWtotkg/m2
-
canopy waterGLWCm--
snow amountGLSNWkg/m2
Water balance (Flux)snow meltSNMLTkg/m2/s--
snow freezeSNFRZkg/m2/s--
snow sublimationSNSUBkg/m2/s--
ice meltICEMLTkg/m2/s--
ice sublimationICESUBkg/m2/s--
snow & ice sublimationSSUBkg/m2/s--
transpirationETFLXkg/m2/s
-
canopy evaporationEIFLXkg/m2/s
-
canopy sublimationEISUBkg/m2/s--
soil evaporationEBFLXkg/m2/s
-
soil sublimationEBSUBkg/m2/s--
total runoff (total) [W1-W2]*2RUNOFFkg/m2/s
-
base runoffRUNOFFBkg/m2/s
-
surface runoffSRUNOFkg/m2/s
-
runoff (lake & land) [W1-W2]*2RUNOFFAkg/m2/s--
Heat balance (State)soil temperature [Z1-Z6]*1GLGK
-
snow temperature [L1-L3]*3GLTSNK
-
land skin temperature [C1-C2]*4GLTSK
-
canopy temperature [C1-C2]*4GLTCK
-
Heat balance (Flux)soil heat fluxGFLUXSW/m2
-
snow surface heat fluxSNFLXSW/m2
-
ground heat flux in totalGFLXTLW/m2--
surface shortwave radiation (upward)SSRUW/m2--
surface longwave radiation (upward)SLRUW/m2--
sensible heat fluxSENSW/m2
-
latent heat fluxLTNTW/m2
-
latent heat flux (evaporation)EVAPW/m2-
Otherssnow covered fractionSNRAT-
-
albedoALB---
snow albedo [A1-A3]*5GLASN---
soil potential [Z1-Z6]*1GPSIPa--
dust density in snow [L1-L3]*3CDSTMppmw--
water flux atmosphere to landWA2Lm/s--
water flux land to riverWL2Rm/s--
soil ice (at each level) [Z1-Z6]*1GLFRSm/m
-
soil ice (total volume)GLFRStotkg/m2
-
land waterWLNDm--
inland water sinkbudgetBUDINDkg/m2/s--
distributed water sinkbudgetRBUDINDkg/m2/s--
ground water inputWINPTkg/m2/s--
lake shSHLKcm--
lake surface temperatureTSIL°C--
CaMa-Floodriver dischargeRIVOUTm3/s--
river water storageRIVSTOm3--
river water depthRIVDPHm
*6		-
river flow velocityRIVVELm/s--
floodplain flow (discharge)FLDOUTm3/s--
floodplain water storageFLDSTOm3--
floodplain water depthFLDDPHm
*6
downscaled floodplain water depth*7FLDDPHm-
flood areaFLDAREm2--
flood fraction*9FLDFRC-
*6		-
downscaled flood fraction*7*9FLDFRC--
water surface elevationSFCELVm--
total discharge (RIVOUT + FLDOUT)*8OUTFLWm3/s
*6
total storage (RIVSTO + FLDSTO)*8STORGEm3--
Statostocsreturn period of rainfall*7RPGPRCTyear
return period of river water depth*7RPRIVDPHyear
*6
downscaled return period of river water depth*7RPRIVDPHyear-
return period of total discharge
(RIVOUT + FLDOUT)*7		RPOUTFLWyear
*6
downscaled return period of total discharge*7RPRIVDPHyear-
  1. *1: Z1-Z6 represents the soil layers, the depth (m) of which is Z1: 0 - 0.05, Z2: 0.05 - 0.25, Z3: 0.25 - 1, Z4: 1 - 2, Z5: 2 - 4, and Z6: 4 - 14.
  2. *2: W1 and W2 represent the values regarding water and ice, respectively.
  3. *3: L1-L3 represents the snow layers. The number of the effective layers and their depth are variable. See Takata et al. (2003) for more details.
  4. *4: C1 and C2 represent the outputs for snow-free canopy and snow-covered canopy, respectively.
  5. *5: A1, A2 and A3 represent the snow albedo of visible, near-infrared and infrared area, respectively.
  6. *6: River width is displayed with enhancement depending on its catchment size.
  7. *7: Only provided in TE-Japan.
    • Downscaled product: downscaled from 1/60 deg. to 1/240 deg. along with the unit catchment defined in the CaMa-Flood model.
    • Return period calculated from the statistical distribution of TE-Japan's simulation results for the period 2007-2020.
  8. *8: Only provided in TE-Global. Regarding wind speed, TE-Japan provides the absolute value of the synthesized wind speed for both eastward and northward directions as GDU.
  9. *9: TE-Japan updated to FLDFRC with permanent water removed from 2020/09/02, TE-Global updated to FLDFRC with permanent water removed from 2022/01/01.

Note:

  • TE-Global tends to have underestimation bias for its base runoff. Users are advised to check whether quality is sufficient for their applications when these data are used.
  • Currently we have an error in unit description for GLW and GLWC netCDF header and figure information. Please refer to the table above for correct information.
  • Eastward wind (GDU) and northward wind (GDV) are available only at TE-Global, while TE-Japan provides the absolute value of the composite wind speed.