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您的检索式：作者名="CAI Pinghe"
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| 1 | Biological productivity and carbon cycling in the Arctic Ocean显示文摘Primary production, bacterial production, par-ticulate organic carbon fluxes and organic carbon burial rates were quantified during the summer period of 1999 in the Arctic Ocean via 14C uptake, 3H uptake, 234Th/238U disequilibrium and 210Pbex dating, respectively. The integrated primary production in the water column was as high as 197 mmolC/(m2·d) in the Chukchi shelf and was 3.8 mmolC/(m2·d) in the Canada Basin. These rates are higher than those reported previously. The ratios of bacterial production to primary production in the study region were higher than 0.5, indicating that microbial activity is not depressed but important in cold Arctic waters. 234Th/238U dis-equilibria were evident at the station in the Canada Basin. The presence of significant 234Th deficiency suggested that scavenging and removal processes are also important to bio-geochemical cycles of trace elements in the Arctic Ocean. Particulate organic carbon export flux was estimated to be 1.0 mmolC/(m2·d). Measurements of sediment | CHEN Min HUANG Yipu GUO Laodong CAI Pinghe YANG Weifeng LIU Guangshan QIU Yusheng | 2002 | Chinese Science Bulletin2002，47，12： | 17 |
| 2 | Export of particulate organic carbon estimated from ^(234)Th-^(238)U disequilibria and its temporal variation in the South China Sea显示文摘Activities of 234Th and nutrient concentrations in the upper 500 m water column were measured at a time-series station in the South China Sea over a time span of 12.3 d. Results showed a reduction of dissolved 234Th and an overall increase of particulate 234Th during the period. Meanwhile, activities of total 234Th kept fairly constant, implying rapid transformation of 234Th between the dissolved and particulate forms. Vertical profiles of total 234Th showed evident deficit of 234Th relative to 238U in the upper 500 m water column. Using an irreversible steady-state model of thorium scavenging, export fluxes of particulateorganic carbon (POC) corresponding to time points T1 and T2 were estimated to be 46.5 and 13.1 mmolC .m-2. d-1. It was demonstrated that the estimation of POC export was greatly dependent on the POC/234Thp ratios and the bias caused by the different models of 234Th scavenging, however, was considered to be of minor importance. | CAI Pinghe, HUANG Yipu, CHEN Min, LIU Guangshan & QIU YushengDepartment of Oceanography, Xiamen University, Xiamen 361005, China | 2001 | Chinese Science Bulletin2001，46，20： | 6 |
| 3 | Low export flux of particulate organic carbon in the central Arctic Ocean as revealed by ^234Th:^238U disequilibrium显示文摘 | Cai Pinghe Loeff M R Stimac I | 2010 | J Geophys Res2010，115，10： | 1 |
| 4 | An Improvement in the Small-Volume Technique for Determining Thorium-234 in Seawater显示文摘 | Cai Pinghe Dai Minhan Lv Dongwei | 2006 | Marine Chemistry2006，100，： | 1 |
| 5 | Measurement of 224 Ra: 228 Th disequilibrium in coastal sediments using a delayed coincidence counter显示文摘 | Pinghe Cai Xiangming Shi Willard S. Moore Minhan Dai | 2012 | Marine Chemistry2012，，： | 1 |
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