<codeBook xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:schemaLocation="ddi:codebook:2_5 http://www.ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" xmlns="ddi:codebook:2_5">
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    <citation>
      <titlStmt>
        <titl xml:lang="sv">Space-time spectra of Northern Hemispheric Rossby waves during extended winter</titl>
        <parTitl xml:lang="en">Space-time spectra of Northern Hemispheric Rossby waves during extended winter</parTitl>
        <IDNo agency="SND">2024-116-2</IDNo>
        <IDNo agency="DOI">https://doi.org/10.57804/w9cn-8z78</IDNo>
      </titlStmt>
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        <producer xml:lang="en" abbr="SND">Swedish National Data Service</producer>
        <producer xml:lang="sv" abbr="SND">Svensk nationell datatjänst</producer>
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      <holdings URI="https://doi.org/10.57804/w9cn-8z78">Landing page</holdings>
    </citation>
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  <stdyDscr>
    <citation>
      <titlStmt>
        <titl xml:lang="sv">Space-time spectra of Northern Hemispheric Rossby waves during extended winter</titl>
        <parTitl xml:lang="en">Space-time spectra of Northern Hemispheric Rossby waves during extended winter</parTitl>
        <IDNo agency="SND">2024-116-2</IDNo>
        <IDNo agency="DOI">https://doi.org/10.57804/w9cn-8z78</IDNo>
        <IDNo agency="DOI">10.5194/wcd-5-733-2024</IDNo>
      </titlStmt>
      <rspStmt>
        <AuthEnty xml:lang="en" affiliation="ETH Zurich">Riboldi, Jacopo</AuthEnty>
        <AuthEnty xml:lang="sv" affiliation="ETH Zurich">Riboldi, Jacopo</AuthEnty>
        <AuthEnty xml:lang="en" affiliation="Earth Sciences, Uppsala University">Schutte, Michael</AuthEnty>
        <AuthEnty xml:lang="sv" affiliation="Geovetenskaper, Uppsala universitet">Schutte, Michael</AuthEnty>
      </rspStmt>
      <prodStmt />
      <distStmt>
        <distrbtr xml:lang="en" abbr="SND" URI="https://snd.se">Swedish National Data Service</distrbtr>
        <distrbtr xml:lang="sv" abbr="SND" URI="https://snd.se">Svensk nationell datatjänst</distrbtr>
        <distDate xml:lang="en" date="2024-06-12" />
      </distStmt>
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        <version elementVersion="2" elementVersionDate="2024-06-12" />
      </verStmt>
      <holdings URI="https://doi.org/10.57804/w9cn-8z78">Landing page</holdings>
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    <stdyInfo>
      <subject>
        <keyword xml:lang="en" vocab="GCMD" vocabURI="https://gcmd.nasa.gov/kms/concept/e79ff727-c598-4a1c-8b4f-b6019fcf386b">WAVE SPECTRA</keyword>
        <keyword xml:lang="en" vocab="INSPIRE Spatial Data Themes" vocabURI="http://inspire.ec.europa.eu/theme/mf">Meteorological geographical features</keyword>
        <keyword xml:lang="sv" vocab="INSPIRE Spatial Data Themes" vocabURI="http://inspire.ec.europa.eu/theme/mf">Geografiska meteorologiska förhållanden</keyword>
        <topcClas xml:lang="en" vocab="INSPIRE topic categories" vocabURI="http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/climatologyMeteorologyAtmosphere">Climatology / Meteorology / Atmosphere</topcClas>
        <topcClas xml:lang="sv" vocab="INSPIRE topic categories" vocabURI="http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/climatologyMeteorologyAtmosphere">Klimatologi och meteorologi</topcClas>
      </subject>
      <abstract xml:lang="en" contentType="abstract">Data contains daily Rossby wave spectra that were obtained from a double Fourier transform, in space and time, and displayed in harmonics with wavenumber n and phase speed c. The underlying dataset for the space-time Fourier analysis is meridional wind of ERA5. 

For further details about data, see section 2.2 in Schutte et al., 2024 (https://doi.org/10.5194/egusphere-2023-1877).

Data is split into two files: 
  1. allyears_NDJFM_35_75_spectra_v250hPa_61d.nc - spectra averaged between 35◦N-75◦N for the troposphere (250 hPa) and,
  2. allyears_NDJFM_45_75_spectra_v10hPa_61d.nc - spectra averaged between 45◦N-75◦N in the stratosphere (10 hPa).

The files contain data for November to March (NDJFM) for years 1979 to 2021.</abstract>
      <abstract xml:lang="sv" contentType="abstract">[Detta är en maskinöversättning. Se den engelska sidan för den ursprungliga beskrivningen]

Data innehåller dagliga Rossbyvågspektra som erhållits från en dubbel Fouriers transform, i rum och tid, och visas i harmonier med vågnummer n och fassnabbhet c. Den underliggande datamängden för rum-tid-Fourieranalysen är ERA5:s meridionala vind.

För ytterligare detaljer om datan, se avsnitt 2.2 i Schutte et al., 2024 (https://doi.org/10.5194/egusphere-2023-1877).

Datan är uppdelad i två filer:
1. allyears_NDJFM_35_75_spectra_v250hPa_61d.nc - spektra genomsnittliga mellan 35°N-75°N för troposfären (250 hPa) och,
2. allyears_NDJFM_45_75_spectra_v10hPa_61d.nc - spektra genomsnittliga mellan 45°N-75°N i stratosfären (10 hPa).

Filerna innehåller data för november till mars (NDJFM) för åren 1979 till 2021.</abstract>
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        <restrctn xml:lang="en">Access to data through SND. Data are freely accessible.</restrctn>
        <restrctn xml:lang="sv">Åtkomst till data via SND. Data är fritt tillgängliga.</restrctn>
        <conditions elementVersion="info:eu-repo-Access-Terms vocabulary">openAccess</conditions>
      </useStmt>
    </dataAccs>
    <othrStdyMat>
      <relPubl>
        <citation>
          <titlStmt>
            <titl xml:lang="sv">Michael Schutte, Daniela I. V. Domeisen, and Jacopo Riboldi: Opposite spectral properties of Rossby waves during weak and strong stratospheric polar vortex events.
Weather Clim. Dynam., 5, 733–752, https://doi.org/10.5194/wcd-5-733-2024, 2024</titl>
            <parTitl xml:lang="en">Michael Schutte, Daniela I. V. Domeisen, and Jacopo Riboldi: Opposite spectral properties of Rossby waves during weak and strong stratospheric polar vortex events.
Weather Clim. Dynam., 5, 733–752, https://doi.org/10.5194/wcd-5-733-2024, 2024</parTitl>
            <IDNo agency="DOI">10.5194/wcd-5-733-2024</IDNo>
          </titlStmt>
          <distStmt>
            <distDate date="2024">2024</distDate>
          </distStmt>
        </citation>
      </relPubl>
    </othrStdyMat>
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