Today's Earth - Global NEXRA (Daily, 0.5deg)

  • DOI: 10.57746/EO.01jjqt3bxwymkqbrm0c0z39dsh
  • Last Updated: 2025-04-14
Data Progress: In Work

Product Summary

Today's Earth (TE) is JAXA's terrestrial hydrological simulation system developed in collaboration with University of Tokyo. The system derives land surface states/fluxes and river conditions from numerical simulation based on satellite observation and atmospheric reanalysis and/or forecast. The system consists of the land surface model MATSIRO (Minimal Advanced Treatments of Surface Interaction and Runoff, Takata et al., 2003) and river routing model CaMa-Flood (Catchment-based Macro-scale Floodplain, Yamazaki et al., 2011).
Today's Earth - Global NEXRA (TE-Global NEXRA) is an ensemble simulation product designed for global coverage. In this product, NEXRA (NICAM-LETKF JAXA Research Analysis), a weather data assimilation dataset developed by JAXA using the NICAM-LETKF system, was used as the model forcing for ensemble simulation. Currently, the mean, standard deviation (sigma), 25th percentile, 75th percentile, minimum, and maximum values of the 128 ensemble members are made available for distribution. For the validation result of the product, please refer to Yamamoto et al., 2025.
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Version, Release date (Temporal coverage)
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Ver.1.0, 2023-08-02 (2019 ~)
(Publication period: For the last 10 years)

Platform
Model
Sensor
N/A

Coverage

Temporal Coverage

2023-08-02 to Present
(Publication period: For the last 10 years)

Spatial Coverage

Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)

Resolution

0.5 degree

Location

  • GEOGRAPHIC REGION > GLOBAL LAND
Dataset Short Name
Todays_Earth_Global_NEXRA_Daily_0.5deg
Platform / Sensor
Model / N/A
Coverage
Spatial Coverage
Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)
Temporal Coverage
2023-08-02 to Present
(Publication period: For the last 10 years)
Product Level ID
L4
Version Description

Ver.1.0, 2023-08-02, Available

File Format
NetCDF
Dataset Type
Daily / Global
Resolution
Spatial Resolution
0.5 degree
Temporal Resolution
Daily
Dataset Progress
In Work
Projection
EQR
Collection Data Type
SCIENCE_QUALITY
Get Data
https://www.eorc.jaxa.jp/water/documents.html
Today's Earth - Global NEXRA (Daily, 0.5deg)
Distribution Format
NetCDF
Fees
Free
Citation
Japan Aerospace Exploration Agency. 2023. Today's Earth - Global NEXRA (Daily, 0.5deg). https://doi.org/10.57746/EO.01jjqt3bxwymkqbrm0c0z39dsh
Access Constraints

No constraints but users need to be registered via following registration form to download files. https://www.eorc.jaxa.jp/water/term.html

Use Constraints

The user should comply with the following terms when using the images and data (https://earth.jaxa.jp/en/data/policy/). Users should specify the following sentence when they publish a thesis, a report, and so on by using the dataset. "Today's Earth product that was used in this paper was supplied by Japan Aerospace Exploration Agency and Institute of Industrial Science, The University of Tokyo."

Today's Earth Terms of service
https://www.eorc.jaxa.jp/water/term.html
ISO Topic Categories
  • Climatology/Meteorology/Atmosphere
  • Inland Waters
Science Keywords
  • EARTH SCIENCE > LAND SURFACE > SURFACE RADIATIVE PROPERTIES
  • EARTH SCIENCE > LAND SURFACE > FROZEN GROUND
  • EARTH SCIENCE > LAND SURFACE > SURFACE THERMAL PROPERTIES
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GROUND WATER
Location Keywords
  • GEOGRAPHIC REGION > GLOBAL LAND
ECV and other Keywords
  • Soil moisture
  • Snow water equivalent
  • Evapotranspiration
  • Runoff
  • River discharge
  • River water depth
  • Flooded fraction

ISO Topic Categories is the keywords in the ISO 19115 - Geographic Information Metadata.

Science Keywords hosts Global Change Master Directory (GCMD) Keywords which are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data, services, and variables are described in a consistent and comprehensive manner and allow for the precise searching of metadata and subsequent retrieval of data, services, and variables.

ECV Keywords hosts a physical, chemical or biological variable or a group of linked variables that critically contributes to the characterization of Earth's climate.