Japanese 55-year Reanalysis (JRA-55)

Abstract:
The Japan Meteorological Agency (JMA) conducted the second Japanese global atmospheric reanalysis, called the Japanese 55-year Reanalysis or JRA-55, to produce a comprehensive atmospheric dataset suitable for studying multidecadal variability and climate change. The data cover the period from 1958, when regular radiosonde observations began on a global basis. JRA-55 is the first comprehensive reanalysis to apply four-dimensional variational analysis to the last half-century. JRA-55 has been produced with the TL319 version of JMA’s operational data assimilation system as of December 2009, which was extensively improved since the Japanese 25-year Reanalysis (JRA-25). It also uses several newly available and improved past observations. The resulting reanalysis products are considerably better than the JRA-25 product. Two major problems of JRA-25 were a cold bias in the lower stratosphere, which has been diminished, and a dry bias in the Amazon basin, which has been mitigated. The temporal consistency of temperature analysis has also been considerably improved compared to previous reanalysis products. JMA continues the production of JRA-55 dataset on a near-real-time basis with the data assimilation system used for this dataset. The dataset is provided in GRIB.

Download plain xml file

To get the data: go to WIS-Portal

General

AttributeValue
fileIdentifier/identifierurn:x-wmo:md:jp.go.jma.wis.dcpc-tcc::JRA-55
language
characterSetutf8
hierarchyLeveldataset
hierarchyLevelName
    contactsee section contact (role: pointOfContact)
    dateStamp 2015-09-18T04:22:31Z
    metadataStandardNameWMO Core Metadata Profile of ISO 19115 (WMO Core), 2003/Cor.1:2006 (ISO 19115), 2007 (ISO/TS 19139)
    metadataStandardVersion1.3
    referenceSystemInfo
    metadataExtensionInfo

    identificationInfo

    AttributeValue
    citation
    • title:
      • Japanese 55-year Reanalysis (JRA-55)
    • dates:
      • fileIdentifier:
        • urn:x-wmo:md:jp.go.jma.wis.dcpc-tcc::JRA-55
          (CodeSpace: )
      • citedResponsibleParty:
        • see section contact (role: distributor)
      • presentationForm:
      • otherCitationDetails:
      abstract see above
      status
      purpose
      pointOfContactsee section contact (role: originator)
      graphicOverview
      resourceMaintenance
      • maintenanceAndUpdateFrequency:
        • daily
      • updateScope:
      • maintenanceNote:
      descriptiveKeywords:
      • theme:
        • climatology
      • place:
        • Globe
      • stratum:
        • Surface
        • Upper-air
      • dataParam:
        • reanalysis
        • data assimilation
        • meteorological observation
      resourceConstraints
      • MD_Constraints:
        • useLimitation:
      • MD_LegalConstraints:
        • accessConstraints:
        • useConstraints: otherRestrictions
        • otherConstraints: Use: citation required for publication
      language
      characterSetutf8
      topicCategoryclimatologyMeteorologyAtmosphere
      extentboundingExtent
      • description:
      • geographicElement:
        • westBoundLongitude: -180
        • eastBoundLongitude: 180
        • southBoundLatitude: -90
        • northBoundLatitude: 90
      • temporalElement:
        • beginPosition:
        • endPosition: (indeterminatePosition = )

      Contact

      Role: pointOfContact

      AttributeValue
      individualName
      organisationNameWMO/WIS/GISC Tokyo
      contactInfo

      Role: distributor

      AttributeValue
      individualName
      organisationName WMO/WIS/DCPC Tokyo (Tokyo Climate Center)
      positionName
      contactInfo

      Role: originator

      AttributeValue
      organisationNameWMO/WIS/DCPC Tokyo (Tokyo Climate Center)
      contactInfo

      contentInfo

      AttributeValue
      CoverageDescription:
      • attributeDescription
      • contentType

      distributionInfo

      AttributeValue
      distributionFormat
      • name:
        • GRIB
      • version:
        • 1 (gco:nilReason=)
      • specification:
      transferOptions (onLine)
      • linkage/ URL:
      • protocol:
      • name:
      • description:

      dataQualityInfo

      AttributeValue
      scope
      report
      • title:
      • date ():
      • explanation:
      • pass:
      lineage
      • statement:
      • processStep:
      /home/gisc/wis/tomcat-extern/webapps/ROOT/metadata/wis-gisc-tokyo/urn%3Ax-wmo%3Amd%3Ajp.go.jma.wis.dcpc-tcc%3A%3AJRA-55.xml