NICAM–LETKF JAXA Research Analysis (NEXRA) Version 2.0

NICAM–LETKF JAXA Research Analysis (NEXRA) Version 2.0

ABSTRACT The NICAM–LETKF JAXA Research Analysis (NEXRA) version 2.0 has been released on the JAXA‐NEXRA Analysis website. This dataset is produced using the Nonhydrostatic Icosahedral Atmospheric Model (NICAM) and the Local Ensemble Transform Kalman Filter (LETKF)‐based atmospheric data assimilation...

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Bibliographic Details
Main Authors: Shuhei Matsugishi, Ying‐Wen Chen, Koji Terasaki, Kaya Kanemaru, Shunji Kotsuki, Hisashi Yashiro, Kosuke Yamamoto, Masaki Satoh, Takuji Kubota, Takemasa Miyoshi
Format: Article
Language:English
Published: Wiley 2025-07-01
Series:Geoscience Data Journal
Subjects:
atmosphere
ensemble Kalman filter
global data
precipitation
research analysis product
Online Access:https://doi.org/10.1002/gdj3.70011
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Summary:ABSTRACT The NICAM–LETKF JAXA Research Analysis (NEXRA) version 2.0 has been released on the JAXA‐NEXRA Analysis website. This dataset is produced using the Nonhydrostatic Icosahedral Atmospheric Model (NICAM) and the Local Ensemble Transform Kalman Filter (LETKF)‐based atmospheric data assimilation system. The system assimilates in situ atmospheric observations, satellite data, and satellite‐derived precipitation data into global atmospheric simulations. NEXRA provides a 128‐member ensemble surface output (2D) and an analysis of ensemble mean and spread (3D) covering the period from January 2019 to June 2024. This dataset supports ensemble studies in geoscience research and serves practical applications, including initial conditions for hindcast simulations with atmospheric models, boundary conditions for ocean and land models, and investigations into spatiotemporal variations in atmospheric variability.
ISSN:2049-6060

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