The Prediction of Sea-level Change Based on the Tide Data in Northwest Pacific

  • Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210046, China

Received date: 2010-08-09

  Revised date: 2010-10-08

  Online published: 2011-01-25

Supported by

Key Project of National Natural Science Foundation of China, No.40730527; National High Technology R&D Program of China, No.2009AA12Z205


Due to the impacts of the inconsistent data timespan, the heterogeneous spatial distribution, and the complexity and uncertainty of sea level change etc., it is difficult to conduct regional sea-level change researches.. Based on the 22 tidal gauge station records in Northwest Pacific ocean marginal sea, the regularized EM algorithm (RegEM) and the Multi-Taper spectral Method (MTM) are adopted to discuss their multi-scale fluctuation processes and their spatial-temporal variations. Integrating orderly cluster and the space adjacent relation of gauge stations, the whole research area is generally divided into five sub-regions, there are Bohai Sea-the coast of the northern Yellow Sea, Yellow-East China Sea near the coast of China, the East China Sea near the coast of Japan, the southern East China Sea and the northwestern South China Sea. Then Mean Generation Function (MGF) is used to predict the medium and long-term trends of each tide station, and Principal Component Analysis (PCA) is employed to obtain regional-scale sea level change trends. The result shows that the sea-level rise rates of five sub-regions from 2001 to 2030 are 1.23-1.27 mm/a, 3.30-3.34 mm/a, 2.72-2.76 mm/a, 1.43-1.47 mm/a and 1.13-1.15 mm/a respectively, and the whole region sea-level rise rate is changed between 2.01 mm/a and 2.11 mm/a. By introducing spatial-temporal variation and multi-scale pedigree characteristic analysis, our work is an attempt of the integrated research on sea-level change characteristic and its prediction.

Cite this article

LUOWen, YUAN Linwang, YI Lin, YU Zhaoyuan, XIE Zhiren . The Prediction of Sea-level Change Based on the Tide Data in Northwest Pacific[J]. Acta Geographica Sinica, 2011 , 66(1) : 111 -122 . DOI: 10.11821/xb201101011


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