热带气象学报2016，Vol.32Issue(6)：864-877,14.DOI:10.16032/j.issn.1004-4965.2016.06.008
Hysplit后向轨迹对初始气象场水平及垂直分辨率的敏感性研究
SENSITIVITY OF HYSPLIT BACK-TRAJECTORIES TO THE HORIZONTAL AND VERTICAL RESOLUTION OF THE METEOROLOGICAL INPUT DATA
摘要
Abstract
In this study,backward particle dispersion modeling is conducted using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model for 2012 in the Pearl River Delta of China.The Global Data Assimilation System (GDAS) data with horizontal resolution of 0.5 degree and the output data from Weather Research and Forecast (WRF) model with horizontal resolution of 27 km are used to drive the HYSPLIT model,respectively.The results reveal that the applicability and reliability of GDAS data is dependent on seasons and synoptic conditions.The direction differences between GDAS and WRF output data generated trajectories are the largest in winter and spring when northerly and northeasterly winds prevail and the smallest in autumn when stable weather systems control the region.Most of trajectories generated from WRF output data transport to higher altitudes than those from GDAS data,due to the more convective boundary layer which the vertical velocity fields from WRF output data reflect.Five different kinds of synoptic conditions are identified which favor generation of large direction differences between trajectories,including continental highs,troughs and ridges,col pressure fields,tropical cyclones and cold fronts.Case studies suggest that in most situations,the large direction differences are mainly resulted from the height differences between trajectories generated from GDAS and WRF output data,and vertical details of input data are more crucial than horizontal details in generating HYSPLIT trajectories.关键词
后向轨迹/初始气象场/分辨率/敏感性/天气形势Key words
Back-trajectory/meteorological input data/resolution/sensitivity/synoptic patterns分类
资源环境引用本文复制引用
苏琳,袁自冰,冯志雄,邓雪娇,刘启汉,邓涛,王楠,殷长秦..Hysplit后向轨迹对初始气象场水平及垂直分辨率的敏感性研究[J].热带气象学报,2016,32(6):864-877,14.基金项目
The Guangdong province science and technology plan (2013B030200001,2015A020215020) （2013B030200001,2015A020215020）
This work was supported by grants SRHIPO01,Environment and Conservation Fund (4/2009),NSFC/RGC Joint Research Scheme (N_HKUST631/05),NSFC-Guangdong Joint Foundation of the Key Projects (U1033001),the Fu Tak Iam Foundation (FTIFL08/09.EG01) and the HKUST Fok Ying Tung Graduate School (NRC06/07.SC01). （4/2009）
