文献类型：期刊文献

英文题名：Air-sea CO₂ fluxes and spatial distribution of seawater pCO₂ in Yongle Atoll, northern-central South China Sea

作者：Yan, Hongqiang[1];Yu, Kefu[1,2,3];Shi, Qi[1];Lin, Ziyun[1];Zhao, Meixia[1];Tao, Shichen[1];Liu, Guohui[1];Zhang, Huiling[4]

机构：[1]South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;[2]Guangxi Univ, Coral Reef Res Ctr China, Nanning 530004, Peoples R China;[3]Guangxi Lab Study Coral Reefs South China Sea, Nanning 530004, Peoples R China;[4]Guangdong Ocean Univ, Dept Ocean Engn, Fac Engn, Zhanjiang 524088, Peoples R China

年份：2018

卷号：165

起止页码：71

外文期刊名：CONTINENTAL SHELF RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000442977800007)、、WOS

基金：The work was supported by the National Key Basic Research Program of China (Grant no. 2013CB956101), the National Natural Science Foundation of China (Grant nos. 41776128, 41206097 and 91428203), and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant no. SQ201112). Yu is also thankful for the support of the Bagui Fellowship from Guangxi Province, China.

语种：英文

外文关键词：Seawater pCO(2); Spatial distribution; Air-sea CO2 flux; Yongle Atoll; Lingyang Reef; North-central South China Sea

外文摘要：Yongle Atoll is a complex atoll composed of 13 separated small atolls/reefs in the Xisha Islands, northern-central South China Sea. Wide, deep channels connect the Yongle Atoll lagoon with the open ocean. The sea surface partial pressure of CO2 (pCO(2)) and sea air CO2 flux was measured at different geomorphological locations on the atoll. Atmospheric pCO(2) generally showed small diurnal variations, while seawaterpCO(2) showed large diurnal variations. Lingyang Reef lagoon, an atoll within Yongle Atoll, was used to check the spatial difference in seawater pCO(2) and air sea CO2 flux. The diurnal variation in seawater pCO(2) was greater in the lagoon (258-748 mu atm) than outside the lagoon area (354-476 mu atm). Differences were also observed in the air sea CO2 fluxes depending on geomorphological zone. The mean seawaterpCO(2) at Yongle Atoll is in the order of Lingyang Reef lagoon > inner reef slope of the Yongle Atoll > Yongle Atoll channel slope approximate to outer reef slope of the Yongle Atoll. The degree mixing between the lagoon and open sea through channels may have a key role in the horizontal distribution of seawaterpCO(2) in the Yongle Atoll. Additional analyses indicated that the daily variations in surface seawater pCO(2) are significantly influenced by biological metabolic processes. The mean air sea CO2 flux in the Yongle Atoll was similar to 3.2 mmol CO2 m(-2) d(-1), indicating that the Yongle Atoll acts as a net source of CO2 to the atmosphere.