Repair wind field in oil contaminated areas with SAR images
In this paper, we compared the normalized radar cross section in the cases of oil spill, biogenic slicks, and clean sea areas with image samples made from 11-pixel NRCS average, and determined their thresholds of the NRCS of the synthetic aperture radar. The results show that the thresholds of oil a...
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| Published in | Chinese journal of oceanology and limnology Vol. 33; no. 2; pp. 525 - 533 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Heidelberg
Springer-Verlag
01.03.2015
Science Press Springer Nature B.V |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0254-4059 2096-5508 1993-5005 1993-5005 2523-3521 |
| DOI | 10.1007/s00343-015-3242-7 |
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| Summary: | In this paper, we compared the normalized radar cross section in the cases of oil spill, biogenic slicks, and clean sea areas with image samples made from 11-pixel NRCS average, and determined their thresholds of the NRCS of the synthetic aperture radar. The results show that the thresholds of oil and biogenic slicks exhibit good consistency with the corresponding synthetic aperture radar images. In addition, we used the normalized radar cross section of clean water from adjacent patches of oil or biogenic slicks areas to replace that of oil or biogenic slicks areas, and retrieve wind field by CMOD5.n and compare wind velocity mending of oil and biogenic slicks areas with Weather Research and Forecasting modeled data, from which the root mean squares of wind speed (wind direction) inversion are 0.89 m/s (20.26°) and 0.88 m/s (7.07°), respectively. Therefore, after the occurrence of oil spill or biogenic slicks, the real wind field could be repaired using the method we introduced in this paper. We believe that this method could improve the accuracy in assessment of a real wind field on medium and small scales at sea, and enhance effectively the monitoring works on similar oil or biogenic slicks incidents at sea surface. |
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| Bibliography: | GUO Jie , HE Yijun , LONG Xiao , HOU Chawei , LIU Xin, MENG Junmin （1 Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences; Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, CAS, Yantai 264003, China ;2 School of Marine Sciences, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China ;3 Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China; 4 Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China; 5 Yantai Marine Environmental Monitoring Central Station, State Oceanic Administration （SOA）, Yantai 264006, China ;6 First Institute of Oceanography, State Oceanic Administration （SOA）, Qingdao 266061, China） In this paper, we compared the normalized radar cross section in the cases ofoil spill, biogenic slicks, and clean sea areas with image samples made from 11-pixel NRCS average, and determined their thresholds of the NRCS of the synthetic aperture radar. The results show that the thresholds of oil and biogenic slicks exhibit good consistency with the corresponding synthetic aperture radar images. In addition, we used the normalized radar cross section of clean water from adjacent patches of oil or biogenic slicks areas to replace that ofoil or biogenic slicks areas, and retrieve wind field by CMOD5.n and compare wind velocity mending of oil and biogenic slicks areas with Weather Research and Forecasting modeled data, from which the root mean squares of wind speed （wind direction） inversion are 0.89 m/s （20.26°） and 0.88 m/s （7.07°）, respectively. Therefore, after the occurrence of oil spill or biogenic slicks, the real wind field could be repaired using the method we introduced in this paper. We believe that this method could improve the accuracy in assessment of a real wind field on medium and small scales at sea, and enhance effectively the monitoring works on similar oil or biogenic slicks incidents at sea surface. wind speed; oil spill; biogenic slicks; normalized radar cross section 37-1150/P http://dx.doi.org/10.1007/s00343-015-3242-7 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 |
| ISSN: | 0254-4059 2096-5508 1993-5005 1993-5005 2523-3521 |
| DOI: | 10.1007/s00343-015-3242-7 |