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| DOI | 10.5194/tc-10-29-2016 |
| Virtual radar ice buoys-a method for measuring fine-scale sea ice drift | |
| Karvonen J. | |
| 发表日期 | 2016 |
| ISSN | 19940416 |
| 卷号 | 10期号:1 |
| 英文摘要 | Here we present an algorithm for continuous ice drift estimation based on coastal and ship radar data. The ice drift is estimated for automatically selected ice targets in the images. These targets are here called virtual buoys (VBs) and are tracked based on an optical flow method. To maintain continuous ice drift tracking new VBs are added after a given number of VBs have been lost; i.e. they can not be tracked reliably any more. Here we also apply the algorithm to data of three test cases to demonstrate its capabilities and properties. Two of these cases use coastal radar data and one ship radar data. Ice drift velocity and direction information derived from the VB motion are computed and compared to the prevailing ice and weather conditions. Also a quantity measuring the local divergence or convergence is computed for some VBs to demonstrate the capability to estimate derived kinematic sea ice parameters from VB location time series. The results produced by the algorithm can be used as an input for estimation of the dynamic properties of sea the ice field, such as ice divergence or convergence, shear, vorticity, and total deformation. © 2016 Author(s). |
| 学科领域 | algorithm; buoy system; drift behavior; dynamic property; estimation method; ice drift; kinematics; radar; sea ice; tracking |
| 语种 | 英语 |
| scopus关键词 | algorithm; buoy system; drift behavior; dynamic property; estimation method; ice drift; kinematics; radar; sea ice; tracking |
| 来源期刊 | Cryosphere
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119724 |
| 作者单位 | Finnish Meteorological Institute (FMI), PB 503, Helsinki, 00101, Finland |
| 推荐引用方式 GB/T 7714 | Karvonen J.. Virtual radar ice buoys-a method for measuring fine-scale sea ice drift[J],2016,10(1). |
| APA | Karvonen J..(2016).Virtual radar ice buoys-a method for measuring fine-scale sea ice drift.Cryosphere,10(1). |
| MLA | Karvonen J.."Virtual radar ice buoys-a method for measuring fine-scale sea ice drift".Cryosphere 10.1(2016). |
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