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

Koyama, T; Stroeve, J; (2019) Greenland monthly precipitation analysis from the Arctic System Reanalysis (ASR): 2000-2012. Polar Science , 19 pp. 1-12. 10.1016/j.polar.2018.09.001. Green open access

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Abstract

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.

Type: Article
Title: Greenland monthly precipitation analysis from the Arctic System Reanalysis (ASR): 2000-2012
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.polar.2018.09.001
Publisher version: https://doi.org/10.1016/j.polar.2018.09.001
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Science & Technology, Life Sciences & Biomedicine, Physical Sciences, Ecology, Geosciences, Multidisciplinary, Environmental Sciences & Ecology, Geology, Arctic, Greenland, Precipitation, North atlantic oscillation, NORTH-ATLANTIC OSCILLATION, SURFACE MASS-BALANCE, SEA-ICE LOSS, CYCLONE ACTIVITY, STORM TRACKS, SHEET, CLIMATE, SNOWFALL, MODEL, ACCUMULATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10071008
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