Mapping sea surface velocities in the Changjiang coastal zone with advanced synthetic aperture radar

WANG Lihua; ZHOU Yunxuan; GE Jianzhong; JOHANNESSEN Johnny A.; SHEN Fang

doi:10.1007/s13131-014-0563-x

基于合成孔径雷达的长江口海表流场反演

doi: 10.1007/s13131-014-0563-x

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
2.
Nansen Environmental and Remote Sensing Center, Bergen 5006, Norway;Geophysical Institute, University of Bergen, Bergen 5006, Norway

计量
- 文章访问数: 1479
- HTML全文浏览量: 53
- PDF下载量: 742
- 被引次数: 0
出版历程
- 收稿日期: 2014-02-24
- 修回日期: 2014-03-20

Mapping sea surface velocities in the Changjiang coastal zone with advanced synthetic aperture radar

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
2.
Nansen Environmental and Remote Sensing Center, Bergen 5006, Norway;Geophysical Institute, University of Bergen, Bergen 5006, Norway

摘要

摘要: 依据多普勒质心频移理论, 综合分析和讨论了Envisat ASAR WSM影像用于海表流场反演的机理和方法。选取长江口及邻近海域为研究实例, 将ASAR WSM反演的海表流场与经过大量实测数据验证和率定的数值模拟FVCOM模型模拟结果进行对比, 显示吻合较好, 表明ASAR多普勒频率异常是一种有效的提取定量海表流场信息的技术方法。进一步定性定量地评价了雷达后向散射强度在方位向的剧烈梯度变化、低入射角、不精确的海表风矢量和雨的出现对ASAR反演海表流场产生的不确定性。长江口及邻近海域ASAR影像海表多普勒流场能够反映局部的海洋环境状况, 可为海洋数值模拟模型等提供精确的空间信息, 对于揭示中国东海海域多尺度的海洋动态至关重要。
- 合成孔径雷达 /
- 长江口 /
- 多普勒质心异常 /
- 径向多普勒速率 /
- FVCOM
Abstract: Range Doppler velocities derived from the Envisat advanced synthetic aperture radar (ASAR) wide swath images are analyzed and assessed against the numerically simulated surface current fields derived from the finite volume coastal ocean model (FVCOM) for the Changjiang Estuary. Comparisons with the FVCOM simulations show that the European Space Agency (ESA) Envisat ASAR based Doppler shift anomaly retrievals have the capability to capture quantitative information of the surface currents in the Changjiang Estuary. The uncertainty analysis of the ASAR range Doppler velocity estimates are discussed with regard to the azimuthal and range bias corrections, radar incidence angles, inaccuracy in the wind field corrections and the presence of rain cells.The corrected range Doppler velocities for the Changjiang Estuary area are highly valuable as they exhibit quantitative expressions related to the multiscale upper layer dynamics and surface current variability around the East China Sea, including the Changjiang Estuary.
- advanced synthetic aperture radar /
- Changjiang coast /
- Doppler centroid anomaly /
- range Doppler velocity /
- finite volume coastal ocean model

HTML全文

参考文献(32)

Chang C Y, Curlander J C. 1992. Application of the multiple PRF technique to resolve Doppler centroid estimation ambiguity for spaceborne SAR. IEEE Transactions on Geoscience and Remote Sensing, 30(5): 941-949

Chapron B, Collard F, Ardhuin F. 2005. Direct measurements of ocean surface velocity from space: interpretation and validation. Journal of Geophysical Research, 110: C07008

Chapron B, Collard F, Kerbaol V. 2004. Satellite synthetic aperture radar sea surface Doppler measurements. Proceedings of the 2nd Workshop Coastal and Marine Applications Synthetic Aperture Radar (SAR). Svalbard, Norway: ESA Publications Division

Collard F, Mouche A, Chapron B, et al. 2008. Routine high resolution observation of selected major surface currents from space. Proceedings of the Conference of SEASAR. Frascati, Italy: ESA Publications Division

Dagestad K F, Hansen M W, Johannessen J A, et al. 2010. Inverting Consistent Surface Current Fields from SAR. Frascati, Roma: European Space Research Institute

Envisat CFI Software. http://eop-cfi.esa.int/index.php/mission-cfi-software/envcfi-software

Ge Jianzhong, Chen Changsheng, Qi Jianhua, et al. 2012. A dike-groyne algorithm in a terrain-following coordinate ocean model (FVCOM): development, validation and application. Ocean Modelling, 47(C): 26-40

Ge Jianzhong, Ding Pingxing, Chen Changsheng, et al. 2013. An integrated East China Sea-Changjiang Estuary model system with aim at resolving multi-scale regional-shelf-estuarine dynamics. Ocean Dynamics, 63(8): 881-900

Gerling T W. 1986. Structure of the surface wind field from the Seasat SAR. Journal of Geophysical Research, 91(C2): 2308-2320

Graber H C, Thompson D R, Carande R E. 1996. Ocean surface features and currents measured with synthetic aperture radar interferometry and HF radar. Journal of Geophysical Research, 101(C11): 25813-25832

Hansen M W, Collard F, Dagestad K F, et al. 2011. Retrieval of sea surface range velocities from Envisat ASAR Doppler centroid measurements. IEEE Transactions on Geoscience and Remote Sensing, 49(10): 3582-3592

Hansen M W, Johannessen J A, Dagestad K F, et al. 2011. Monitoring the surface inflow of Atlantic water to the Norwegian Sea using Envisat ASAR. Journal of Geophysical Research, 116: C12008

Horstmann J, Koch W, Lehner S. 2004. Ocean wind field retrieved from the advanced synthetic aperture radar aboard ENVISAT. Ocean Dynamics, 54(6): 570-576

Johannessen J A, Chapron B, Collard F, et al. 2008. Direct ocean surface velocity measurements from space: improved quantitative interpretation of Envisat ASAR observations. Geophysical Research Letter, 35: L22608

Kerbaol V, Collard F. 2005. SAR-derived coastal and marine applications: from research to operational products. IEEE Journal of Oceanic Engineering, 30(3): 472-486

Li F K, Held D N, Curlander J C, et al. 1985. Doppler parameter estimation for spaceborne synthetic-aperture radars. IEEE Transactions on Geoscience and Remote Sensing, 23(1): 47-56

Li Jiufa, Shi Weirong, Shen Huanting. 1994. Sediment properties and transportation in the turbidity maximum in Changjiang estuary. Geographical Research (in Chinese), 13(1): 51-59

Lehner S, Schulz-Stellenfleth J, Schattler B, et al. 2000. Wind and wave measurements using complex ERS-2 SAR wave mode data. IEEE Transactions on Geoscience and Remote Sensing, 38(5): 2246-2257

Madsen S N. 1989. Estimating the Doppler centroid of SAR data. IEEE Transaction on Aerospace and Electornic Systems, 25(2): 134-140

Michael Y J. 1996. Optimal range and Doppler centroid estimation for a ScanSAR system. IEEE Transactions on Geoscience and Remote Sensing, 34(2): 479-488

Mouche A, Dagestad K F, Collard F, et al. 2012. On the use of Doppler shift for sea surface wind retrieval from SAR. IEEE Transactions on Geoscience and Remote Sensing, 50(7): 2901-2909

National Climatic Data Center. http://www.ncdc.noaa.gov/oa/rsad/air-sea/seawinds.html

Pandian P K, Emmanuel O, Ruscoe J P, et al. 2010. An overview of recent technologies on wave and current measurement in coastal and marine applications. Journal of Oceanography and Marine Science, 1(1): 1-10

Peirson W L, Banner M L. 2003. Aqueous surface layer flows induced by microscale breaking wind waves. Journal of Fluid Mechanics, 479: 1-38

Romeiser R, Suchand S, Runge H, et al. 2010. First analysis of TerraSAR-X along-track InSAR-derived current fields. IEEE Transactions on Geoscience and Remote Sensing, 48(2): 820-829

Romeiser R, Thompson D R. 2000. Numerical study on the along-track interferometric radar imaging mechanism of oceanic surface currents. IEEE Transactions on Geoscience and Remote Sensing, 38(1): 446-458

Rouault M J, Mouche A, Collard F, et al. 2010. Mapping the Agulhas Current from space: an assessment of ASAR surface current velocities. Journal of Geophysical Research, 115: C10026

Stoffelen A, Anderson D. 1997. Scatterometer data interpretation: estimation and validation of the transfer function CMOD4. Journal of Geophysical Research, 102(C3): 5767-5780

Thompson D R, Jensen J R. 1993. Synthetic-aperture radar interferometry applied to ship-generated internal waves in the 1989 Loch Linnhe experiment. Journal of Geophysical Research Oceans, 98(C6): 10259-10269

Vachon P W, Dobson F W. 1996. Validation of wind vector retrieval from ERS-1 SAR images over the ocean. The Global Atmosphere and Ocean System, 5(2): 177-187

Wu Hui, Zhu Jianrong. 2010. Advection scheme with 3rd high-order spatial interpolation at the middle temporal level and its application to salt water intrusion in the Changjiang Estuary. Ocean Modelling, 33: 33-51

Yang Z, Wang H, Saito Y, et al. 2006. Dam impacts on the Changjiang (Yangtze) River sediment discharge to the sea: the past 55 years and after the Three Gorges Dam. Water Resource Research, 42: W04407

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1479
HTML全文浏览量: 53
PDF下载量: 742
被引次数: 0

基于合成孔径雷达的长江口海表流场反演

doi: 10.1007/s13131-014-0563-x

计量

出版历程

Mapping sea surface velocities in the Changjiang coastal zone with advanced synthetic aperture radar

计量

出版历程

目录