JRA55-JMACPS2-Delta-S14FD reanalysis-forecast combined meteorological forecing dataset


Citation for this dataset
Toshichika Iizumi. (2022). JRA55-JMACPS2-Delta-S14FD reanalysis-forecast combined meteorological forecing dataset [Data set]. Data Integration and Analysis System (DIAS). https://doi.org/10.20783/DIAS.649
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IDENTIFICATION INFORMATION

Name JRA55-JMACPS2-Delta-S14FD reanalysis-forecast combined meteorological forecing dataset
Edition version 1.0
DOI doi:10.20783/DIAS.649
Metadata Identifier JRA55_JMACPS2_Delta_S14FD20230727103827-DIAS20221121113753-en

CONTACT

CONTACT on DATASET

Name Toshichika Iizumi
Organization Institute for Agro-Environmental Sciences, National Agriculture and Food Research Institute
Address 3-1-3 Kannondai, Tsukuba, Ibaraki, 305-8604, Japan
TEL 029-838-8201
E-mail iizumit@affrc.go.jp

CONTACT on PROJECT

Data Integration and Analysis System

Name DIAS Office
Organization Japan Agency for Marine-Earth Science and Technology
Address 3173-25, Showa-Cho, Kanazawa-ku, Yokohama-shi, Kanagawa, 236-0001, Japan
E-mail dias-office@diasjp.net

DOCUMENT AUTHOR

Name Toshichika Iizumi
Organization Institute for Agro-Environmental Sciences, National Agriculture and Food Research Institute
E-mail iizumit@affrc.go.jp

DATASET CREATOR

Name Toshichika Iizumi
Organization Institute for Agro-Environmental Sciences, National Agriculture and Food Research Institute
E-mail iizumit@affrc.go.jp

DATE OF THIS DOCUMENT

2023-07-27

DATE OF DATASET

  • creation : 2022-10-26

DATASET OVERVIEW

Abstract

The JRA55-JMACPS2-Delta-S14FD is a global 0.5°-resolution bias-corrected reanalysis-forecast combined daily meteorological forcing dataset. For the reanalysis part, JRA-55 provided by the Japan Meteorological Agency (JMA) was used after aggregating its 3-hourly values into daily values. Daily outputs from the JMA/MRI-CPS2 forecast system were used for the forecast part of the combined dataset. The reanalysis and forecast values were respectively bias-corrected and then combined on a common baseline climatology. The S14FD meteorological forcing dataset was used as the baseline. The delta method was used for the bias correction. The delta method was applied differently depending on the weather variables (additively for temperature, humidity, radiation, and pressure and multiplicatively for precipitation and wind speed).

After the bias correction, calculated relative changes in the reanalysis and forecast values, relative to each climatology, were combined onto the climatology of the meteorological forcing to produce a daily time series for three years per combining date. A 3-year period spans from January 1 of the year before the combining date (t-1) to December 31 of the year after (t+1) of the combining data. The reanalysis data are used before the combining date, and then it is assigned the forecast data for about 240 days after the combining date, and the climatology of baseline meteorological forcing after that. The delta method is used in the bias correction. The combining dates are 13 cases, 30 days apart, beginning from January 10 (denoted as 0110) to December 6th (denoted as 1206), namely 0110, 0209, 0301, 0331, 0430, 0530, 0629, 0729, 0828, 0927, 1007, 1106, and 1206. The combined data are available for each of the combining dates from 2010 to 2021. Note that if the combining date is January 10th, 2010, the three-year period of the combined data starts from January 1st, 2009 to December 31st, 2011. Similarly, if the combining date is December 6th, 2021, the 3-year period spans from January 1st, 2020 to December 31st, 2022.

The weather variables include daily mean, maximum and minimum 2m air temperature (tave2m, tmax2m, tmin2m; °C), daily total precipitation (precsfc, mm d-1), downward shortwave and long radiation flux (dswrfsfc, dlwrfsfc; W m-2), 2m relative and specific humidity (rh2m, %; and spfh2m, kg kg-1), 10m wind speed (wind10m, m s-1), and surface pressure (pressfc, hPa).

Topic Category(ISO19139)

  • climatologyMeteorologyAtmosphere

Temporal Extent

Begin Date 2010-01-01
End Date 2021-12-31
Temporal Characteristics Daily

Geographic Bounding Box

North bound latitude 90
West bound longitude -180
Eastbound longitude 180
South bound latitude -90

Grid

Dimension Name Dimension Size (slice number of the dimension) Resolution Unit
row 720 0.5 (deg)
column 360 0.5 (deg)

Keywords

Keywords on Dataset

Keyword Type Keyword Keyword thesaurus Name
theme [Atmosphere ] > [Atmospheric Temperature ] > [Surface Air Temperature ], [Atmosphere ] > [Precipitation ] > [Precipitation Rate ], [Atmosphere ] > [Atmospheric Radiation ] > [Shortwave Radiation ], [Atmosphere ] > [Atmospheric Water Vapor ] > [Humidity ], [Atmosphere ] > [Atmospheric Winds ] > [Surface Winds ] > [Wind Speed/Wind Direction ], [Atmosphere ] > [Atmospheric Pressure ] > [Surface Pressure ] GCMD_science

Keywords on Project

Data Integration and Analysis System
Keyword Type Keyword Keyword thesaurus Name
theme DIAS > Data Integration and Analysis System No_Dictionary

Distribution Information

name version specification
NetCDF 4

DATA PROCESSING

Data Processing (1)

General Explanation of the data producer's knowledge about the lineage of a dataset

In this combined meteorological forcing dataset, the JRA-55 reanalysis and the JMA/MRI-CPS2 forecast are bias-corrected for the S14FD meteorological forcing, respectively, and then combined to be a single daily time series. The reanalysis data are used before the combining date, the forecast data for about 240 days after the combining date, and the climatology of baseline meteorological forcing after that. The delta method is used in the bias correction.

DATA POLICY

Data Policy by the Data Provider

If data are used, the relevant reference(s) should be cited. For the reference(s), see the References section.

Data Policy by the Project

Data Integration and Analysis System

If data provider does not have data policy, DIAS Terms of Service (https://diasjp.net/en/terms/) and DIAS Privacy Policy (https://diasjp.net/en/privacy/) apply.

If there is a conflict between DIAS Terms of Service and data provider's policy, the data provider's policy shall prevail.

DATA SOURCE ACKNOWLEDGEMENT

Acknowledge the Data Provider

If you plan to use this dataset for a conference presentation, paper, journal article, or report etc., please include acknowledgments referred to following examples. If the data provider describes examples of acknowledgments, include them as well.

" This study used the JRA55-JMACPS2-Delta-S14FD reanalysis-forecast combined meteorological forecing dataset. the dataset was distributed from the Data Integration and Analysis System (DIAS), which was developed and operated by a project supported by the Ministry of Education, Culture, Sports, Science and Technology. "

Acknowledge the Project

Data Integration and Analysis System

If you plan to use this dataset for a conference presentation, paper, journal article, or report etc., please include acknowledgments referred to following examples. If the data provider describes examples of acknowledgments, include them as well.

" In this study, [Name of Dataset] provided by [Name of Data Provider] was utilized. This dataset was also collected and provided under the Data Integration and Analysis System (DIAS), which was developed and operated by a project supported by the Ministry of Education, Culture, Sports, Science and Technology. "

REFERENCES

in preparation

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