11:45 AM - 12:00 PM
[ACG37-11] Occurrence frequency of lee-side downslope winds near Siorapaluk in northwest Greenland
Keywords:Greenland, lee-side downslope wind, Non-hydrostatic model
These strong wind events seriously affected the scientific activity and residents’ living, which motivate the authors to study occurrence characteristics of strong winds in the northwest Greenland. According to observation performed during 2016-2017 and 2017-2018 winter seasons in Siorapaluk, strong winds more than 15 ms-1occur in several times. These winds are always from the north-northeast to the observation point, which means that these winds blow beyond the ridgeline in the north of Siorapaluk. Year-round observation in Qaanaaq shows that strong winds appear also in summer as well as in winter. Some strong wind events are found to occur simultaneously in Siorapaluk and Qaanaaq. Numerical simulations are conducted for the period from May 2017 to April 2018 by using the Japan Meteorological Agency’s non-hydrostatic model (JMA-NHM) with the 1-km horizontal resolution to reveal temporal and spatial distributions of strong winds and mechanisms causing them. Statistical features of strong winds and dynamical connections between synoptic and local wind systems will be presented in the meeting.
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Hashimoto, A., M. Niwano, S. Yamaguchi, T. Yamasaki and T. Aoki, 2018: Numerical simulation of lee-side downslope winds near Siorapaluk in northwest Greenland. CAS/JSC WGNE Research Activities in Atmospheric and Oceanic Modelling, 48, 5.05-5.06.
This work was partly supported by the Joint Research Program of the Institute of Low Temperature Science, Hokkaido University, Japan, and JSPS KAKENHI Grant Numbers, JP15H01733, JP16H01772, and JP17K12817.