Evaluation of downscaled near-surface wind over maritime continent based on stations measurement

Abstract

In the maritime continent where most of the region is an ocean, wind field is the main driving force to generate ocean wave. The use of inaccurate wind fields to drive ocean model may result in significant biases. Many global reanalysis wind data are available, but the performance is subject to each region. Moreover, the resolution of global data is less representative for the maritime continent region. This paper presents the dynamically downscaled near-surface wind of NCEP/DOE re-analysis II (R2) over the maritime continent by regional climate model (RegCM4.6). We evaluate 10m wind modeled by R2 and its downscaled based on stations measurement available from Agency for Meteorology, Climatology and Geophysics (BMKG). Moreover, the results of downscaled wind are also compared with re-analysis wind from ECWMF ERA-Interim. We compare daily 10m zonal and meridional wind speed from 10 stations near the coast during 1 January 2013 until 31 December 2016. Then, we investigate the added value of the dynamical downscaling to the near-surface wind fields over the maritime continent.