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http://dx.doi.org/10.14191/Atmos.2016.26.4.673

Accuracy Assessment of Planetary Boundary Layer Height for the WRF Model Using Temporal High Resolution Radio-sonde Observations  

Kang, Misun (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Lim, Yun-Kyu (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Cho, Changbum (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Kim, Kyu Rang (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Park, Jun Sang (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Kim, Baek-Jo (Applied Meteorology Research Division, National Institute of Meteorological Sciences)
Publication Information
Atmosphere / v.26, no.4, 2016 , pp. 673-686 More about this Journal
Abstract
Understanding limitation of simulation for Planetary Boundary Layer (PBL) height in mesoscale meteorological model is important for accurate meteorological variable and diffusion of air pollution. This study examined the accuracy for simulated PBL heights using two different PBL schemes (MYJ, YSU) in Weather Research and Forecasting (WRF) model during the radiosonde observation period. The simulated PBL height were verified using atmospheric sounding data obtained from radiosonde observations that were conducted during 5 months from August to December 2014 over the Gumi weir in Nakdong river. Four Dimensional Data Assimilation (FDDA) using radiosonde observation data were conducted to reduce error of PBL height in WRF model. The assessment result of PBL height showed that RMSE with YSU scheme were lower than that with MYJ scheme in the day and night time, respectively. Especially, the WRF model with YSU scheme produced lower PBL height than with the MYJ scheme during night time. The YSU scheme showed lower RMSE than the MYJ scheme on sunny, cloudy and rainy day, too. The experiment result of FDDA showed that PBL height error were reduced by FDDA and PBL height at the nudging coefficient of $3.0{\times}10^{-1}$ (YSU_FDDA_2) were similar to observation compared to the nudging coefficient of $3.0{\times}10^{-4}$ (YSU_FDDA_1).
Keywords
WRF; planetary boundary layer height; radiosonde; PBL schemes; FDDA;
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