Impact of Grid Nudging Parameters on Dynamical Downscaling during Summer over Mainland China
Impact of Grid Nudging Parameters on Dynamical Downscaling during Summer over Mainland China
复制标题
夏季电网微移参数对中国大陆动态降尺度的影响
DOI：
10.3390/atmos8100184
复制
发表时间：
2017-09
期刊：
影响因子：
2.9
通讯作者：
Qiu Xiaobin
中科院分区：
文献类型：
--
作者：
Mai Xiaoping;Ma Yuanyuan;Yang Yi;Li Deqin;Qiu Xiaobin
The grid nudging technique is often used in regional climate dynamical downscaling to make the simulated large-scale fields consistent with the driving fields. In this study, we focused on two specific questions about grid nudging: (1) which nudged variable has a larger impact on the downscaling results; and (2) what is the “optimal” grid nudging strategy for each nudged variable to achieve better downscaling result during summer over the mainland China. To solve these queries, 41 three-month-long simulations for the summer of 2009 and 2010 were performed using the Weather Research and Forecasting model (WRF) to downscale National Centers for Environmental Prediction (NCEP) Final Operational Global Analysis (FNL) data to a 30-km horizontal resolution. The results showed that nudging horizontal wind or temperature had significant influence on the simulation of almost all conventional meteorological elements, while nudging water vapor mainly affected the precipitation, humidity, and 500 hPa temperature. As a whole, the optimal nudging time was one hour or three hours for nudging wind, three hours for nudging temperature, and one hour for nudging water vapor. The optimal nudged level was above the planetary boundary layer for almost every nudged variable. Despite these findings, it should be noted that the optimum nudging scheme varied with simulated regions and layers, and dedicated research for different regions, seasons, and model configuration is advisable.
登录
查看更多内容
DOI：
10.5065/d6rr1w7m
发表时间：
2013
期刊：
--
影响因子：
--
作者：
K. Oleson;M. Lawrence;B. Bonan;B. Drewniak;Maoyi Huang;D. Koven;S. Levis;Fang Li;J. Riley
通讯作者：
K. Oleson;M. Lawrence;B. Bonan;B. Drewniak;Maoyi Huang;D. Koven;S. Levis;Fang Li;J. Riley
影响因子：
2.9
作者：
W. Cheng;W. J. Steenburgh
通讯作者：
W. Cheng;W. J. Steenburgh
影响因子：
5.4
作者：
R. Wilby;T. Wigley;D. Conway;P. Jones;B. Hewitson;J. Main;D. Wilks
通讯作者：
R. Wilby;T. Wigley;D. Conway;P. Jones;B. Hewitson;J. Main;D. Wilks
DOI：
10.1175/1520-0450(1994)033
发表时间：
1994-04
期刊：
Journal of Applied Meteorology
影响因子：
--
作者：
Julxo C. Calvo;J. Gregory
通讯作者：
Julxo C. Calvo;J. Gregory
影响因子：
4.9
作者：
T. Otte;C. Nolte;M. Otte;J. Bowden
通讯作者：
T. Otte;C. Nolte;M. Otte;J. Bowden