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Peinan Z.,Marine Environmental Ensuring Center | Jun T.,Marine Environmental Ensuring Center | Bin W.,Marine Environmental Ensuring Center
Disaster Advances | Year: 2010

Marine disasters belong to natural disasters. Ocean is the cradle of life on Earth nurtured, but it is also the breeding grounds for many marine disasters. Such as storm tide, wave, tsunami, sea ice, etc. Storm tide is the heaviest natural disaster in them. In face of nature disaster, human beings seem unable tiny. But including marine disasters, many natural disasters can be prevented and mitigated by researching and forecasting. Tliis article describes the main types of marine disasters; discuss of a marine disaster prevention and mitigation methods; summary and outlook the problems on marine disaster prevention and mitigation should be pay attention to.


Shen X.,Marine Environmental Ensuring Center | Ye C.,University of Shanghai for Science and Technology | Liu Z.,University of Shanghai for Science and Technology | Wu G.,University of Shanghai for Science and Technology
Journal of Engineering Technology | Year: 2016

Aiming at solving the colour union, variation and loss problems during cross-media reproduction in the layer-tinted map, this study proposes a colour gamut mapping model for the preservation of visual differentials in layer-tinted maps. First, many layer-tinted maps are collected for analysis and the colouring rules are concluded. Then, the dominant and non-dominant colours are extracted based on the colour gamut characteristics of the maps. For the mapping of dominant colours, the corresponding Munsell's three colour dimensions are calculated by establishing the transformational relation between CIELAB colour space and Munsell's colour system and then the colour gamut mapping of dominant colours is achieved in the Munsell's colour order system. On the other hand, the mapping of non-dominant colours is achieved by hue-angle preserving minimum ΔE clipping. The experimental results indicaté that compared with the four colour gamut mapping methods recommended by the International Color Consortium, the proposed algorithm in this study can more easily distinguish the hierarchical information in the maps and perfectly remain the visual differentials among the layered colours.


Zheng P.-N.,Ocean University of China | Zheng P.-N.,Marine Environmental Ensuring Center | Wu D.-X.,Ocean University of China | Lin X.-P.,Ocean University of China | Li X.-T.,Marine Environmental Ensuring Center
Journal of Hydrodynamics | Year: 2010

Based on the Hybrid Coordinate Ocean Model (HYCOM), this article presents simulations of the three-dimensional dynamic and thermal structure of the North Pacific Ocean (NPO) in the time domain from January 1991 to December 2000. The baroclinic current field and its interannual variability in Northwest Pacific Ocean (NWPO), especially, the Kuroshio Current (KC) and the Japan/East Sea (JES) are analyzed and discussed. The results show that the HYCOM covers a complete dynamic and thermo process with adequate representations of the eddy fields and variability in main spatial and temporal scales. The model is used to simulate the strong interanual variability of the KC, which may affect the strength of the eastern bifurcation of the Tsushima Warm Current (TSWC), named the Nearshore Branch (NB) in the JES. When the KC is strong and its axis is close to the Japan Island, the TSWC and its bifurcations in the JES would intensify accordingly. Our results confirm once again the hypothesis of Yang et al. that the KC determines the annual mean NB in the JES via the "island integral constraint". This article further extends this hypothesis to study the KC role in the NB on a time dependent scale. © 2010 Publishing House for Journal of Hydrodynamics.


Zheng P.,Marine Environmental Ensuring Center | Liu J.,Marine Environmental Ensuring Center | Li J.,Marine Environmental Ensuring Center | Li X.,Marine Environmental Ensuring Center | Chen X.,Ocean University of China
ISWREP 2011 - Proceedings of 2011 International Symposium on Water Resource and Environmental Protection | Year: 2011

This article focus on the yellow river estuary's changing path to sea, study the issue from perspectives of history, geography, humanities and so on, and discuss a mechanism of the Yellow River estuary's changing path to sea under the mutual effect of the climate change, frozen soil area, forest area and geography around the Yellow River region and human activities. One of the main reasons of destroying the river source is human harmful living way. Irrational plan which divides river water to another regions is a direct reason of the reduction of the Yellow River water flowing into the sea. The warming climate and degenerated frozen soil are indirect reasons. The Yellow River estuary's changing path to sea is not only a science question, but also a large problem for human survival. Stopping destroying activities and acting sustainably are the only way to solve this problem. © 2011 IEEE.

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