摘要
2006年4—5月对南黄海和东海北部进行了悬浮体调查,分析研究了45个站位的悬浮体资料和数据,阐述了南黄海和东海北部春季颗粒有机碳(POC)的平面和垂向分布特征,并结合悬浮体总氮(PN)和C/N摩尔比值探讨了其来源及其影响因素。结果表明,研究区春季表层悬浮体POC在东海北部31°N、123°E附近含量最高,124°E以东悬浮体POC含量相对降低;长江口邻近海区表层悬浮体POC浓度较高,与长江冲淡水径流携带大量营养物质刺激生物生长有关。底层悬浮体POC含量高值区出现在南黄海33.5°N、121.5°E附近,在东海31.5°N、124.5°E附近出现次高值区,东海31°N以南区域POC含量则相对较低,高浓度主要受底质再悬浮作用影响。C/N摩尔比显示,南黄海和东海北部悬浮体有机质主要为海洋来源。研究区悬浮体POC的分布主要受海流影响,可以识别出黄海暖流、苏北沿岸流和长江冲淡水等控制区。南黄海和东海北部悬浮体POC分布是有机质来源和海流作用等因素共同作用的结果。
A survey of the suspended matter in the South Yellow Sea and the north part of the East China Sea was conducted in April to May 2006.Based on the data from the samples collected at 45 stations,the horizontal and vertical distribution patterns of the particulate organic carbon（POC） of the Yellow Sea and the East China Sea were presented in this paper.And the sources of the POC and the influencing factors were further discussed according to the particulate nitrogen（PN） and C/N.The results show that the highest concentration of surface suspended POC appear at the area around 123° E,31° N in the East China Sea,while the value was lower in the south Yellow Sea and the area to the east of 124° E in the East China Sea.The concentration of surface POC in the vicinity of the Changjiang Estuary is obviously higher than that in other areas,indicating the primary influence by the Changjiang diluted water.However,the highest concentration of bottom suspended POC occurs at the area adjacent of 121.5° E,33.5° N in the south Yellow Sea.And also there was a second highest concentration around 124.5° E,31.5° N in the East China Sea.The value was relative lower in areas to the south of 31° N in the East China Sea.It could be inferred that the high concentration of bottom POC was mainly controlled by the resuspension of sediments.The C/N suggests that the POC of the study area was mainly from the ocean.It is concluded that currents play a critical role in the distribution of POC of suspended matters.Therefore,different areas under the contral of the Yellow Sea Warm Current,the Subei Coastal Current and the Yangtze Diluted Water could be distinguished.The distribution pattern of the POC in the study area was controlled by both the sources of the organic matter and the ocean currents.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2010年第3期7-14,共8页
Marine Geology & Quaternary Geology
基金
我国近海海洋综合调查与评价专项(908-01-CJ08,908-02-02-05)
关键词
悬浮体
颗粒有机碳
颗粒氮
南黄海与东海北部
suspended matter
particulate organic carbon
particulate nitrogen
the Yellow Sea
the East China Sea
