Cristin-resultat-ID: 1808470
Sist endret: 11. januar 2021, 09:45
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

A note on the statistical evidence for an influence of geomagnetic activity on Northern Hemisphere seasonal-mean stratospheric temperatures using the Japanese 55-year Reanalysis

Bidragsytere:
  • Nazario Tartaglione
  • Thomas Toniazzo
  • Yvan Orsolini og
  • Odd Helge Otterå

Tidsskrift

Annales Geophysicae
ISSN 0992-7689
e-ISSN 1432-0576
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Volum: 38
Sider: 545 - 555
Open Access

Importkilder

Scopus-ID: 2-s2.0-85083828041

Beskrivelse Beskrivelse

Tittel

A note on the statistical evidence for an influence of geomagnetic activity on Northern Hemisphere seasonal-mean stratospheric temperatures using the Japanese 55-year Reanalysis

Sammendrag

We employ JRA-55 (Japanese 55-year Reanalysis), a recent second-generation global reanalysis providing data of high quality in the stratosphere, to examine whether a distinguishable effect of geomagnetic activity on Northern Hemisphere stratospheric temperatures can be detected. We focus on how the statistical significance of stratospheric temperature differences may be robustly assessed during years with high and low geomagnetic activity. Two problems must be overcome. The first is the temporal autocorrelation of the data, which is addressed with a correction of the t statistics by means of the estimate of the number of independent values in the series of correlated values. The second is the problem of multiplicity due to strong spatial autocorrelations, which is addressed by means of a false discovery rate (FDR) procedure. We find that the statistical tests fail to formally reject the null hypothesis, i.e. no significant response to geomagnetic activity can be found in the seasonal-mean Northern Hemisphere stratospheric temperature record.

Bidragsytere

Nazario Tartaglione

  • Tilknyttet:
    Forfatter
    ved NORCE Klima og miljø ved NORCE Norwegian Research Centre AS

Thomas Toniazzo

  • Tilknyttet:
    Forfatter
    ved NORCE Klima og miljø ved NORCE Norwegian Research Centre AS

Yvan Joseph Georges Emile G. Orsolini

Bidragsyterens navn vises på dette resultatet som Yvan Orsolini
  • Tilknyttet:
    Forfatter
    ved Atmosfære og klima ved NILU
  • Tilknyttet:
    Forfatter
    ved Institutt for fysikk og teknologi ved Universitetet i Bergen

Odd Helge Otterå

  • Tilknyttet:
    Forfatter
    ved NORCE Klima og miljø ved NORCE Norwegian Research Centre AS
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