title: A new method to calibrate Lagrangian model with ASAR images for oil slick trajectory.
abstract: Since Lagrangian model coefficients vary with different conditions, it is necessary to calibrate the model to obtain optimal coefficient combination for special oil spill accident. This paper focuses on proposing a new method to calibrate Lagrangian model with time series of Envisat ASAR images. Oil slicks extracted from time series images form a detected trajectory of special oil slick. Lagrangian model is calibrated by minimizing the difference between simulated trajectory and detected trajectory. mean center position distance difference (MCPD) and rotation difference (RD) of Oil slicks' or particles' standard deviational ellipses (SDEs) are calculated as two evaluations. The two parameters are taken to evaluate the performance of Lagrangian transport model with different coefficient combinations. This method is applied to Penglai 19-3 oil spill accident. The simulation result with calibrated model agrees well with related satellite observations. It is suggested the new method is effective to calibrate Lagrangian model.
authors.affiliation: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: tiansiyu1029@163.com.
authors.forename: Siyu
authors.initials: S
authors.lastname: Tian
authors.affiliation: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: huangxx@radi.ac.cn.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Huang
authors.affiliation: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: lihongga@irsa.ac.cn.
authors.forename: Hongga
authors.initials: H
authors.lastname: Li
mesh_terms: D002138:Calibration; D004784:Environmental Monitoring / Q000379:methods*; D008962:Models, Theoretical; D010578:Petroleum; D059392:Petroleum Pollution / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D010578:Petroleum; D014874:Water Pollutants, Chemical
keywords: Bohai Sea; Envisat ASAR; Lagrangian model calibration; Oil slick trajectory; Penglai 19-3 oil spill; Time series images