Greenland monthly precipitation analysis from the Arctic System Reanalysis (ASR): 2000–2012
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Greenland monthly precipitation analysis from the Arctic System Reanalysis (ASR): 2000–2012

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  • Journal Title:
    Polar Science
  • Personal Author:
  • NOAA Program & Office:
    CIRES (Cooperative Institute for Research in Environmental Sciences)
  • Description:
    Arctic System Reanalysis version 1 (ASRv1) forecasts of monthly precipitation over Greenland are compared with gauge-based precipitation measured by the Danish Meteorological Institute (DMI) and precipitation retrieved from the Precipitation Occurrence Sensor System (POSS) at Summit. The ASRv1 precipitation generally agrees with the corrected DMI gauge-based precipitation measured at coastal or near-coastal stations in Greenland, but the corresponding data at Ikerasassuaq and Nuuk are not the case. ASRv1 precipitation at Summit, i.e., in a higher continental environment, is overestimated compared with the POSS observations. The North Atlantic Oscillation (NAO index and ASRv1 precipitation are moderately correlated over northern Greenland, the North Atlantic, and the Greenland Sea regions (0.32–0.49). It is presumed that local wind events have a larger influence on precipitation where smaller correlations occur. Suggested future work to understand discrepancies between ASRv1 and DMI precipitation fields in Greenland coastal regions is to include case studies of local wind events and corresponding precipitation variations utilizing in-situ measurements during both strong positive and negative NAO phases. At high-altitude and inland areas, further observations are needed to confirm the ASRv1 overestimation.
  • Keywords:
  • Source:
    Polar Science, 19, 1-12
  • DOI:
  • Document Type:
    Journal Article
  • Place as Subject:
    Greenland
  • Rights Information:
    CC BY
  • Compliance:
    Submitted
  • Main Document Checksum:
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  • File Type:

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