CAJ | 학술논문

基于中国第29次南极科学考察在普里兹湾海域采集的61个站位的表层悬浮体样品的颗粒有机碳（POC）及其稳定同位素（δ13 CPOC ）测试结果，结合卫星遥感解译的研究区海水表面温度（SST）、叶绿素a（Chl a）浓度和海冰覆盖率数据，研究了普里兹湾海域表层水体悬浮POC的分布特征，探讨了悬浮体中POC的来源及其形成过程。结果表明，2013年夏季普里兹湾表层悬浮POC浓度为0．28-0．84 mg·L-1，平均浓度为0．48 mg·L-1；δ13 CPOC值的变化范围为-29．68‰--26．30‰，平均值为-28．01‰。表层水体悬浮 POC 分布呈现近岸高于远岸，西部高于东部的特征。POC的高值区主要分布在冰架附近，与表层水体Chl a浓度和海冰覆盖率分布趋势基本一致，表明夏季普里兹湾表层水体悬浮POC主要由浮游植物现场生产，而浮游植物的生长受到了海冰的显著影响。在普里兹湾外部海域表层水体悬浮颗粒物δ13 CPOC值从东向西逐渐偏负，而调查区东部从近岸向远海逐渐偏负，反映该海域δ13 CPOC分布特征主要受到浮游植物吸收与固定CO2速率的影响。中山站附近海域δ13 CPOC值显著偏负，可能是受到近岸海域陆源有机质输入和浮游生物种属改变的影响。
기우중국제29차남겁과학고찰재보리자만해역채집적61개참위적표층현부체양품적과립유궤탄（POC）급기은정동위소（δ13 CPOC ）측시결과，결합위성요감해역적연구구해수표면온도（SST）、협록소a（Chl a）농도화해빙복개솔수거，연구료보리자만해역표층수체현부POC적분포특정，탐토료현부체중POC적래원급기형성과정。결과표명，2013년하계보리자만표층현부POC농도위0．28-0．84 mg·L-1，평균농도위0．48 mg·L-1；δ13 CPOC치적변화범위위-29．68‰--26．30‰，평균치위-28．01‰。표층수체현부 POC 분포정현근안고우원안，서부고우동부적특정。POC적고치구주요분포재빙가부근，여표층수체Chl a농도화해빙복개솔분포추세기본일치，표명하계보리자만표층수체현부POC주요유부유식물현장생산，이부유식물적생장수도료해빙적현저영향。재보리자만외부해역표층수체현부과립물δ13 CPOC치종동향서축점편부，이조사구동부종근안향원해축점편부，반영해해역δ13 CPOC분포특정주요수도부유식물흡수여고정CO2속솔적영향。중산참부근해역δ13 CPOC치현저편부，가능시수도근안해역륙원유궤질수입화부유생물충속개변적영향。
The 29th Chinese National Antarctic Research Expedition collected 61 samples of surface suspensions of par-ticulate organic carbon (POC)in Prydz Bay,Antarctica.The factors influencing the distribution of POC,and its sources and transport processes,were studied by analyzing the distribution of the POC and δ13 CPOC values and the surface sea temperatures,chlorophyll a concentrations and sea ice coverage measured by satellite remote sensing. The results showed that POC concentration in the surface layer of Prydz Bay was 0.28-0.84 mg·L-1 ,with an average of 0.48 mg · L-1 .δ13 CPOC values varied from -29.68‰ to -26.30‰,with an average value of-28.01‰.The surface POC distribution in summer shows that high values of POC are mainly found near ice shelves,and POC values in the western survey area are higher than those in the eastern region.The POC content shows a good correlation with chlorophyll a concentration and sea ice coverage,suggesting that POC was mainly derived from phytoplankton production in the local water column,while the growth of phytoplankton was obviously affected by sea ice.The δ13 CPOC values gradually decrease from east to west outside of Prydz Bay,whereas from the shore to the sea the δ13 CPOC values gradually become more negative in the eastern survey area,suggesting that δ13 CPOC was mainly influenced by the rate of phytoplankton CO2 fixation outside Prydz Bay waters.Theδ13 CPOC value in coastal waters near Zhongshan Station was significantly more negative.Terrigenous organic detritus inputs and changes in phytoplankton species might have contributed to the carbon isotopic values of POC.