Rapid migration of mainland China's coastal erosion vulnerability due to anthropogenic changes.

With the global rise in sea levels caused by climate change and frequent extreme weather processes, high-density population aggregation and human development activities to enhance coastal areas vulnerability, populations, resources, and the ecological environment are facing huge pressure. Natural coastlines are being destroyed, and increasingly serious problems, such as coastal erosion and ecological fragility, have become disasters in coastal zones. The coastal vulnerability changed by climatic variables has created a major concern at regional, national and global scales. By comparing the data of two periods in the past 40 years, coastline vulnerability of coastal erosion in mainland China were evaluated by use of reverse cloud model and AHP with 10 indicators, including natural, anthropogenic, social and economic factors, etc. The main factors controlling coastal erosion included the proportion of Quaternary strata, the gradual reclamation of marine areas as land areas (in kilometres) and the percentage decrease in coastal sediment entering the sea. The secondary impact factors included the high proportion of artificial coastlines and the impacts of waves and storm surges under the influence of relative sea level changes. Human activities could further influence coastal vulnerability, making the erosion risk a considerable concern. Legislation, coordinated management system and technology are proposed to improve the quality of the marine ecological environment.

Data of surface sediment diatoms on the inner shelf of the East China Sea from winter 2008 to summer 2009.

The data of the identification of diatoms in surface sediment samples from the inner shelf of the East China Sea, are presented here. This data were collected during three surveys: one in winter 2008 and two in summer 2009, i.e., before and after the passage of Typhoon Morakot. Diatom identification was performed using an optical microscope (Olympus BX51). For detailed analysis, explanation, and discussion, the reader is referred to "The influence of season and Typhoon Morakot on the distribution of diatoms in surface sediments on the inner shelf of the East China Sea" Chen et al, 2019. Slides of all samples are held at the Third Institute of Oceanography of the Ministry of Natural Resources in Xiamen (P.R. China).