搜索结果: 121-135 共查到“知识库 海洋物理学”相关记录3965条 . 查询时间(5.766 秒)
Three-dimensional hydrodynamic model of concrete tetrahedral frame revetments
concrete frame tetrahedrons numerical simulation drag lift
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2011/9/13
Revetments of concrete frame tetrahedrons are being used more and more in river engineering in China. Due to their complex geometry, it is difficult to measure the velocity fields inside them using tr...
Using a linear array to estimate the velocity of underwater moving targets
underwater velocity measurement linear array direction of arrival (DOA) deterministic maximum likelihood signal phase matching
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2011/9/13
A new method uses a linear array that takes advantage of underwater physical sound fields to estimate the velocity of an underwater moving target. The mathematical model was established by considering...
BOOK REVIEW——Estuaries: Dynamics, Mixing, Sedimentation and Morphology
Physical oceanography dynamics mixing sedimentation
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2015/7/6
For instructors or students of physical oceanography at the graduate level, choosing a textbook is a pleasant exercise and often a matter of taste rather than necessity when it comes to open-ocean pro...
用Argo温盐资料估计印度尼西亚贯穿流多年平均地转输送
Argo浮标 印度尼西亚贯穿流 地转输送
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2009/11/17
利用Argo浮标资料，估计了2003—2007年期间印度尼西亚贯穿流（ITF）出口处114.5οE断面上层(0—1000m)的地转流，并与WOA05资料进行对比。在114.5οE断面上9.5ο—18.5οS之间，依据Argo资料计算的上层(0—1000m)地转流年平均输送为4.2Sv(1 Sv = 106m3.s-1)，比依据WOA05资料计算的流量大0.5Sv左右，与前人对IX1断面的估算接近。...
西太平洋副热带高压与海表温度的关系
西太平洋副热带高压 SST异常 相关
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2009/11/17
利用超前滞后相关分析研究了西太平洋副热带高压与海表面温度异常的关系。选取各关键海区分析海温与西太副高在不同时段上的超前滞后相关, 结果表明，冬季东太平洋海温与滞后其2—3个月的副高异常达最大正相关，热带印度洋海温异常与冬季同期副高异常的正相关最显著；西太平洋海温在冬春季与同期的副高负相关最显著；北太平洋海温在冬春季滞后副高1—2个月时存在负相关，大西洋暖池区6月与西太副高的同期正相关最大；对南太平...
利用混合光谱分解估测珠江口悬浮泥沙浓度
珠江口 Hyperion 悬浮泥沙
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2009/11/17
利用遥感技术估测水体中的悬浮泥沙的浓度已经成为一门成熟的技术，但将其应用于河口地区悬浮泥沙的监测仍然存在一些限制。限制之一是遥感数据（例如MODIS）的空间分辨率太低，不适合应用于河口等狭小水域的监测。相比较而言，Hyperion高光谱遥感数据有196个波段，覆盖400-2500nm的光谱范围，光谱分辨率为10nm,空间分辨率为30m，其高光谱分辨率及高空间分辨率，显示了其在河口水体悬浮泥沙遥感中...
基于两种半分析算法的水体吸收系数反演
半分析算法 吸收系数 南海 福建沿岸
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2009/11/17
本文基于42组不同年份不同季节获得的遥感反射率、水体各组分吸收系数的实测数据，对QAA（Quasi-Analytical Algorithm）和GSM（Garver-Siegel-Maritorena）算法在寡营养的南海和富营养的福建沿岸两种不同类型水体的吸收系数反演进行了检验。以水样测量值为参考，两种算法在本研究水体中的反演成效与他人在其它水域的研究结果相当。QAA算法在南海的反演成效高于福建沿...
厄尔尼诺期间和后期南海海面温度的两次显著增暖过程
南海 海表面温度 年际变化 厄尔尼诺
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2009/11/17
通过分析ICOADS海洋气象资料，结合ISCCP短波辐射和OISST海面温度，研究并探讨了ENSO等大尺度海气相互作用过程背景下南海海表面温度（SST）的年际变化。研究表明，南海SSTA的年际变化和ENSO关系密切，并且分为两个阶段。以增暖事件为例，在厄尔尼诺（El Nino）发生年的冬季和消亡年的夏季，南海出现了两次显著增暖。第一次增暖出现在El Nino盛期，是El Nino影响的一部分，这时...
Investigating internal waves east of the Hainan Island using optical satellite remote sensing data
internal wave formation mechanism marginal water east of the Hainan Island satellite remote sensing
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2009/11/17
Marginal water of east Hainan Island was an area that internal waves occurred frequently, however, few studies was found and mechanism for internal waves formation was unclear. In the paper, China Bra...
Eddy-induced cross-shelf phytoplankton transport along the downwelling coast off Western Australia
Leeuwin Current mesoscale eddies chlorophyll cross-shelf exchange geostrophic current finite-size Lyapunov exponent
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2009/11/17
Along the downwelling coast off Western Australia, late-autumn/early-winter chlorophyll a blooms are observed on the continental shelf south of Shark Bay (26°S), in contrast with summer blooms in the ...
Altimetry-observed semi-annual cycle in the South China Sea: Real signal or alias of K1 tidal error?
sea level semi-annual cycle satellite altimetry South China Sea
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2009/11/17
There have been a number of applications of satellite altimetry to seasonal and interannual sea level variability in the South China Sea. However, these applications usually exclude shallow waters alo...
A study on retrieval algorithms in oceanic passive microwave remote sensing using 1.4 GHz and 10.7 GHz bands
polarimetric microwave radiometer sea-surface salinity remote sensing retrieval algorithm
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2009/11/17
To retrieve sea-surface salinity (SSS) from radiometer data at 1.4 GHz, auxiliary data of sea-surface temperature (SST), surface roughness and meteorological variables are needed. The authors study oc...
A new scheme for retrieving ocean surface salinity from simulated multi-angular SMOS brightness temperature
SMOS salinity retrieval multi-incidence angle
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2009/11/17
The European Space Agency will launch the first salinity satellite for remotely sensing the global soil moisture and ocean salinity (SMOS) at a sun-synchronous orbit in 2009. One of the payloads on th...
Surface flow structure of the Gulf Stream from composite imagery and satellite-tracked drifters
Surface flow structure Gulf Stream composite imagery satellite-tracked drifters
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2009/11/16
A unique set of coutemporaneous satellite-tracked drifters and five-day composite Advanced Very High Resolution Radionmeter (AVHRR) satellite imagery of the North Atlantic has been analyzed to examine...
Lagrangian drifter paths and length scales in the tropical Pacific warm pool from 1990 to 1991:with application of fractal techniques
Lagrangian drifter paths length scales tropical Pacific warm pool fractal techniques
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2009/11/16
This paper presents an analysis of WOCE/TOGA surface drifter paths and its interpretation in conjunction with the west Pacific warm pool water motion. Our interest here lies in the existence of scale ...