Extreme indices and return levels of daily maximum 10m wind speed in the Arctic 
and around Greenland

Gutjahr, Oliver; Heinemann, Günther

doi:10.1594/PANGAEA.892874

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Extreme indices and return levels of daily maximum 10m wind speed in the Arctic and around Greenland

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Gutjahr, Oliver
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Citation

Gutjahr, O., & Heinemann, G. (2018). Extreme indices and return levels of daily maximum 10m wind speed in the Arctic and around Greenland. Pangaea.

Cite as: https://hdl.handle.net/21.11116/0000-000D-3864-4

Abstract

A polar-adjusted version of the regional climate model COSMO-CLM was used at a horizontal resolution of about 15km (0.125°}; C15) to simulate and analyse extreme 10m wind speeds from 1979-2016 in winter (Nov to Apr) in the Arctic and around Greenland. Based on daily maximum 10m wind speeds, extreme indices (95{%} percentiles, average strong gale and hurricane days per winter) and return levels up to the 20year return period are calculated and compared with state-of-the-art reanalysis data sets (ERA-Interim, ASR version 1 and 2) and with the satellite product CCMP version 2. The return levels were calculated by the {'}peaks-over-threshold{'} (POT) method which fits a General Pareto distribution (GPD) to extreme values exceeding a specified high threshold (for this study the local 95{%} and 99{%} percentiles). The model comparison was based on the overlapping winter period 2000-2012 (Nov to Apr). Before the analysis all data sets were interpolated onto the rotated model grid of C15 (450x350 grid boxes, with the rotated pole located at 100{°}W and 0{°N).