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Yellow Sea Thermal Structure

Yellow Sea Thermal Structure
Author: Charles R. Fralick
Publisher:
Total Pages: 110
Release: 1994
Genre: Marine meteorology
ISBN:

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There exists a need in the oceanography community to be able to produce climatologies of remote or poorly sampled shallow water areas through remote sensing techniques. Our goal was to construct a three-dimensional thermal structure of the Yellow Sea based primarily upon sea surface temperature data. The ability to do this successfully could lead the way to applying these techniques elsewhere using remotely sensed SST. The shallow water and dynamic conditions of the Yellow Sea made it an ideal study area. The large MOODS observational data set for the area provided us with 15,000 observations from 1929 to 1991. For the winter months we used regression techniques on the predominantly well-mixed, vertically isothermal profiles with excellent results. For the summer we applied a Feature Model which extracted physically significant depths and gradients from the observations. These modeled data were statistically compared with mixed results indicating little link between SST and mixed-layer depth but good correlation between SST and thermocline gradient. We believe interannual variability and significant sampling errors in our data contributed to our mixed results. Overall, we feel our approach is robust and has potential for further applications providing data quality issues are addressed.


Yellow Sea Thermal Structure

Yellow Sea Thermal Structure
Author:
Publisher:
Total Pages: 95
Release: 1994
Genre:
ISBN:

Download Yellow Sea Thermal Structure Book in PDF, ePub and Kindle

There exists a need in the oceanography community to be able to produce climatologies of remote or poorly sampled shallow water areas through remote sensing techniques. Our goal was to construct a three-dimensional thermal structure of the Yellow Sea based primarily upon sea surface temperature data. The ability to do this successfully could lead the way to applying these techniques elsewhere using remotely sensed SST. The shallow water and dynamic conditions of the Yellow Sea made it an ideal study area. The large MOODS observational data set for the area provided us with 15,000 observations from 1929 to 1991. For the winter months we used regression techniques on the predominantly well-mixed, vertically isothermal profiles with excellent results. For the summer we applied a Feature Model which extracted physically significant depths and gradients from the observations. These modeled data were statistically compared with mixed results indicating little link between SST and mixed-layer depth but good correlation between SST and thermocline gradient. We believe interannual variability and significant sampling errors in our data contributed to our mixed results. Overall, we feel our approach is robust and has potential for further applications providing data quality issues are addressed. (AN).


How to UsCurrent Law

How to UsCurrent Law
Author:
Publisher:
Total Pages:
Release: 1959
Genre:
ISBN:

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A Parametric Model for the Yellow Sea Thermal Variability

A Parametric Model for the Yellow Sea Thermal Variability
Author:
Publisher:
Total Pages: 10
Release: 1997
Genre:
ISBN:

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A thermal parametric model has been developed for analyzing observed regional sea temperature profiles based on a layered structure of temperature fields (mixed layer, thermocline, and deep layers). It contains three major components: (1) a first-guess parametric model, (2) high-resolution profiles interpolated from observed profiles, and (3) fitting of high-resolution profiles to the parametric model. The output of this parametric model is a set of major characteristics of each profile: sea surface temperature, mixed-layer depth, thermocline depth, thermocline temperature gradient, and deep layer stratification. Analyzing nearly 15,000 Yellow Sea historical (1950-1988) temperature profiles (conductivity-temperature-depth station, 4285; expendable bathythermograph, 3213; bathythermograph, 6965) from the Naval Oceanographic Office's Master Oceanographic Observation Data Set by this parametric model, the Yellow Sea thermal fields reveals dual structure: one layer (vertically uniform) during winter and multilayer (mixed layer, thermocline, sublayer) during summer. Strong seasonal variations were also found in mixed-layer depth, thermocline depth, and thermocline strength.


Air-Sea Interactions and Water Mass Structure of the East China Sea and Yellow Sea

Air-Sea Interactions and Water Mass Structure of the East China Sea and Yellow Sea
Author:
Publisher:
Total Pages: 74
Release: 1998-03-01
Genre:
ISBN: 9781423561194

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The climatological water mass features, the seasonal variabilities of the thermohaline structure, and the linkage between fluxes (momentum, heat, and moisture) of the East China and Yellow Seas have been investigated. The long term mean surface heat balance corresponds to a heat gain of 15 W/m2 in the Yellow Sea shelf (YS), a heat loss of around 30 W/m2 in the East China Sea shelf (ECS) and Cheju bifurcation zone (CB), and around 65 W/m2 in the Taiwan Warm Current region (TWC) and Kuroshio Current region (KC). The surface fresh water balance, i.e., evaporation minus precipitation, ranges from -1.8 to -4.0 cm/ month for the five subareas. The four seasons for the stud area are divided based on the relative heat storage, which do not follow the usual atmospheric seasons. The entire water column of the ECS, YS and CB undergoes a seasonal thermal cycle with maximum values of temperature during summer and maximum mixed layer depths during winter. Only the surface waters of TWC and KC exhibit a seasonal thermal cycle. Two patterns exist in the surface salinity and Yangtze River run-off, out of phase in the East China Sea and in phase in the Yellow Sea.


Deep Learning for Marine Science

Deep Learning for Marine Science
Author: Haiyong Zheng
Publisher: Frontiers Media SA
Total Pages: 555
Release: 2024-05-15
Genre: Science
ISBN: 2832549055

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Deep learning (DL), mainly composed of deep and complex neural networks such as recurrent network and convolutional network, is an emerging research branch in the field of artificial intelligence and machine learning. DL revolution has a far-reaching impact on all scientific disciplines and every corner of our lives. With continuing technological advances, marine science is entering into the big data era with the exponential growth of information. DL is an effective means of harnessing the power of big data. Combined with unprecedented data from cameras, acoustic recorders, satellite remote sensing, and large model outputs, DL enables scientists to solve complex problems in biology, ecosystems, climate, energy, as well as physical and chemical interactions. Although DL has made great strides, it is still only beginning to emerge in many fields of marine science, especially towards representative applications and best practices for the automatic analysis of marine organisms and marine environments. DL in nowadays' marine science mainly leverages cutting-edge techniques of deep neural networks and massive data which collected by in-situ optical or acoustic imaging sensors for underwater applications, such as plankton classification and coral reef detection. This research topic aims to expand the applications of marine science to cover all aspects of detection, classification, segmentation, localization, and density estimation of marine objects, organisms, and phenomena.


Air-sea Interactions and Water Mass Structure of the East China Sea and Yellow Sea

Air-sea Interactions and Water Mass Structure of the East China Sea and Yellow Sea
Author: Akira Kuninaka
Publisher:
Total Pages: 64
Release: 1998
Genre:
ISBN:

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The climatological water mass features, the seasonal variabilities of the thermohaline structure, and the linkage between fluxes (momentum, heat, and moisture) of the East China and Yellow Seas have been investigated. The long term mean surface heat balance corresponds to a heat gain of 15 W/m2 in the Yellow Sea shelf (YS), a heat loss of around 30 W/m2 in the East China Sea shelf (ECS) and Cheju bifurcation zone (CB), and around 65 W/m2 in the Taiwan Warm Current region (TWC) and Kuroshio Current region (KC). The surface fresh water balance, i.e., evaporation minus precipitation, ranges from -1.8 to -4.0 cm/ month for the five subareas. The four seasons for the stud area are divided based on the relative heat storage, which do not follow the usual atmospheric seasons. The entire water column of the ECS, YS and CB undergoes a seasonal thermal cycle with maximum values of temperature during summer and maximum mixed layer depths during winter. Only the surface waters of TWC and KC exhibit a seasonal thermal cycle. Two patterns exist in the surface salinity and Yangtze River run-off, out of phase in the East China Sea and in phase in the Yellow Sea.


P-Vector Inverse Method

P-Vector Inverse Method
Author: Peter C. Chu
Publisher: Springer Science & Business Media
Total Pages: 610
Release: 2007-02-15
Genre: Science
ISBN: 354033386X

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A major task for physical oceanographers is to determine the movement of oceanic water from observations. This book introduces the P-vector inverse method, with a two-step determination of the velocity from hydrographic data. The book provide insights into the basics of the P-vector inverse method and the features of the inverted global and regional ocean circulations. Upper undergraduate and graduate students as well as oceanographers, marine biologists and other environmental scientists will find this book a valuable tool for their studies.