极地研究2016，Vol.28Issue(1)：42-48,7.DOI:10.13679/j.jdyj.2016.1.042
南极普里兹湾及邻近南大洋水体N2O分布特征
DISTRIBUTION OF N2 O IN PRYDZ BAY AND ADJACENT SOUTHERN OCEAN
摘要
Abstract
Water samples collected from Prydz Bay and the adjacent Southern Ocean during the 25th and 26th Chinese National Antarctic Research Expeditions were analyzed for N 2 O concentration using the static headspace gas chro-matography method .The concentration of N 2 O over the Prydz Bay continental shelf was found to be relatively low , with a range of 13.2—17.4 nmol· L-1 , and it was undersaturated compared with the current atmospheric mixing ratio, with saturation anomaly centers at -7%.However, higher concentrations of N 2 O, with a range of 15.5—23.3 nmol· L-1 , were found in the adjacent Southern Ocean .The subsurface to bottom waters all showed oversatu-ration against the atmospheric mixing ratio prior to the industrial revolution .It was established that the distribution pattern of N 2 O within the study area was related to the complex hydrographic characteristics of the region .Prydz Bay shelf water with undersaturated N 2 O might mix with Circumpolar Deep Water and sink to the bottom of the Southern Ocean , forming Antarctic Bottom Water .This could act as a pathway for N 2 O transportation into deep wa-ter, providing a sink for atmospheric N 2 O.关键词
南极/氧化亚氮/普里兹湾/南大洋/温室气体Key words
N2O/Antarctic/Prydz Bay/Southern Ocean/greenhouse gas引用本文复制引用
吴曼,詹力扬,陈立奇..南极普里兹湾及邻近南大洋水体N2O分布特征[J].极地研究,2016,28(1):42-48,7.基金项目
国家自然科学基金(41230529,41476172),国家国际科技合作专项极区海洋酸化与评估国际合作项目(2015DFG22010),国家海洋局极地考察办公室对外合作支持项目(IC201201, IC201308, IC201513)和国家海洋局“南北极环境综合考察与评估”专项(CHINARE2012-201501-04-02,01-02-01,03-04-02)资助 （41230529,41476172）
