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| 1 | Global air-sea surface carbon-dioxide transfer velocity and flux estimated using ERS-2 data and a new parametric formula显示文摘用到 1998 年 8 月的从从 1997 年 7 月的欧洲遥感 scatterometer (ERS-2 ) 的数据,由空至海的 CO2 转移速度和流动的全球分布被检索。有表面风速度和波浪险峻的由空至海的 CO2 转移速度的一个新模型被建议。波浪险峻() 用一个神经网络(NN ) 被检索从 ERS-2 scatterometer 数据的模型,当风速度被 ERS-2 scatterometer 直接导出时。新模型在在许多介绍的风速度依赖者关系中基于风速度和变化与明确的表达同意以前的研究能被这种建议关系在波浪险峻效果与变化解释很好。煤气的转移速度和流动的季节地全球的地图在 1 个一时期期间根据新模型和转移速度和流动的季节的变化被显示出。全球吝啬的煤气的转移速度是在区域重量和 Schmidt 数字修正和它的精确性遗体计算以后的 30 cm/h 与在 situ 数据。最高的转移速度发生在 60.54 和 0.96 附近。我们在建议的模型和已经为一些巴西区域出版的 16 个主要模型之间比 0.9 高获得了全面空间关联,吗?? | YU Tan HE Yijun ZHA Guozhen SONG Jinba LIU Guoqiang GUO Jie | 2013 | Acta Oceanologica Sinica2013，32，7： | 1 |
| 2 | Effects of westward shoaling pycnocline on characteristics and energetics of internal solitary wave in the Luzon Strait by numerical simulations显示文摘An internal gravity wave model was employed to simulate the generation of internal solitary waves(ISWs)over a sill by tidal flows.A westward shoaling pycnocline parameterization scheme derived from a three-parameter model was adopted,and then 14 numerical experiments were designed to investigate the influence of the pycnocline thickness,density difference across the pycnocline,westward shoaling isopycnal slope angle and pycnocline depth on the ISWs.When the pycnocline thickness on both sides of the sill increases,the total barotropic kinetic energy,total baroclinic energy and ratio of baroclinic kinetic energy(KE)to available potential energy(APE)decrease,whilst the depth of isopycnal undergoing maximum displacement and ratio of baroclinic energy to barotropic energy increase.When the density difference on both sides of the sill decreases synchronously,the total barotropic kinetic energy,ratio of baroclinic energy to barotropic energy and total baroclinic energy decrease,whilst the depth of isopycnal undergoing maximum displacement increases.When the westward shoaling isopycnal slope angle increases,the total baroclinic energy increases whilst the depth of turning point almost remains unchanged.When the depth of westward shoaling pycnocline on both sides of the sill reduces,the ratio of baroclinic energy to barotropic energy and total baroclinic energy decrease,whilst the total barotropic kinetic energy and ratio of KE to APE increase.When one of the above four different influencing factors was increased by 10%while the other factors keep unchanged,the amplitude of the leading soliton in ISW Packet A was decreased by 2.80%,7.47%,3.21%and 6.42%respectively.The density difference across the pycnocline and the pycnocline depth are the two most important factors in affecting the characteristics and energetics of ISWs. | Haibin Lli Yujun Liu Xiaokang Chen Guozhen Zha Shuqun Cai | 2021 | Acta Oceanologica Sinica2021，40，5： | 0 |
| 3 | An accelerated nonlocal means algorithm for synthetic aperture radar ocean image despeckling显示文摘Synthetic aperture radar(SAR)images play an increasingly important role in ocean environmental monitoring and research.However,SAR images are inherently corrupted by speckle noise.SAR ocean images have some unique characteristics.The signatures of ocean phenomena in SAR images mainly exhibit as stripe or plaque shaped features.These features typically have a high degree of self-similarity or redundancy.The nonlocal means(NLM)method can measure the structural similarity between different image patches and take advantage of redundant information in images.Considering that the NLM algorithm is computationally intensive and timeconsuming,an accelerated NLM algorithm for SAR ocean image despeckling is proposed in this paper.A method is used to discriminate between texture and flat pixels in SAR images.Large similarity and search windows are used on texture pixels,whereas small similarity and search windows are used on flat pixels.Furthermore,the improved NLM algorithm is accelerated by a graphic processing unit(GPU)based on the compute unified device architecture(CUDA)parallel computation framework.The computational efficiency is improved by approximately 200 times. | Guozhen Zha Dewei Xu Yanming Yang Xin’gai Song Fuhuang Zhong | 2019 | Acta Oceanologica Sinica2019，38，11： | 0 |
| 4 | A curvelet-based method to determine wave directions from nautical X-band radar images显示文摘A new method to determine wave directions from nautical X-band images is proposed. The signatures of ocean waves show obvious scale and directional characteristics in nautical X-band radar images. Curvelet transform(CT) possesses very high scale and directional sensitivities. Therefore, it has good capability to analyze ocean wave fields. The radar images are decomposed at different scales, in different directions, and at different positions by CT, and curvelet coefficients are obtained. Given to the scale and directional characteristics of surface waves,the information of ocean waves is centralized in the curvelet coefficients of certain directions and at certain scales.Therefore, the wave orientations can be determined. The 180 ambiguity is removed by calculating crosscorrelation coefficients(CCCs) between continuous collected images. The proposed method is verified by the dataset collected on the Northwest coast of the Zhangzi Island in the Yellow Sea of China from March to April 2009. | ZHA Guozhen HE Qingyou GUAN Changlong CHEN Jitao | 2018 | Acta Oceanologica Sinica2018，37，1： | 0 |
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