南海同位素化学数据集（1991-2016）

收集了包括90年代以来南海海洋同位素化学科学考察历史资料，数据包括1992年南海海区环流配合性合作调查航次；1993年南海航次、1994年南海航次；“九五”、“十五”南沙综合科学考察航次；2006、2007年近海海洋综合调查与评价专项航次；2009南海中南部调查航次；2011南海中南部调查航次；2011北部湾夏季航次；2011南沙海域冬季航次；2013、2015年自然科学基金南海西部共享航次；2015-2018年“营养物质变化对海湾生物群落结构及其演替的影响机理”项目科考航次资料。观测指标包括水温、盐度、稳定同位素（碳、氮、氢、氧）、放射性同位素（钋、钍、铀、镭、铅）、固氮速率、初级生产力等同位素化学参数。

This dataset compiles historical marine isotope chemical scientific expedition data in the South China Sea since the 1990s, covering the following cruise surveys: 1992 cooperative survey cruise for South China Sea circulation collaboration; 1993 and 1994 South China Sea cruises; "Ninth Five-Year Plan" and "Tenth Five-Year Plan" comprehensive scientific expedition cruises to the Nansha Islands; 2006 and 2007 special cruises for the Comprehensive Marine Survey and Evaluation of Coastal Waters; 2009 survey cruise in the central and southern South China Sea; 2011 survey cruise in the central and southern South China Sea; 2011 summer cruise in the Beibu Gulf; 2011 winter cruise in the Nansha sea area; 2013 and 2015 shared cruises in the western South China Sea supported by the National Natural Science Foundation of China; and scientific expedition cruise data from the project titled "Mechanism of the Impact of Nutrient Changes on the Structure and Succession of Bay Biological Community" conducted from 2015 to 2018. The observed isotope chemical parameters include water temperature, salinity, stable isotopes (carbon, nitrogen, hydrogen, oxygen), radioactive isotopes (polonium, thorium, uranium, radium, lead), nitrogen fixation rate, and primary productivity.