台湾海峡南部夏季的颗粒有机碳

叶翔; 李炎; 黄邦钦; 陈坚

台湾海峡南部夏季的颗粒有机碳

叶翔¹,
李炎^2,,
黄邦钦²,
陈坚³

1.
国家海洋局, 第三海洋研究所, 海洋与海岸地质环境开放实验室, 福建, 厦门, 361005;厦门大学, 福建省/教育部海洋环境科学联合重点实验室, 福建, 厦门, 361005
2.
厦门大学, 福建省/教育部海洋环境科学联合重点实验室, 福建, 厦门, 361005
3.
国家海洋局, 第三海洋研究所, 海洋与海岸地质环境开放实验室, 福建, 厦门, 361005

基金项目: 国家自然科学基金面上项目(40876031);国家自然科学基金重点项目(40331004)

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出版历程
- 收稿日期: 2009-05-14
- 修回日期: 2009-08-26

Particulate organic carbon in the southern Taiwan Strait during summer

1.
, Open Laboratory of Ocean & Coast Environmental Geology, Third Institute of Oceanography, State Ocean Administration, Xiamen 361005, China;Joint Key Laboratory of Coastal Study, Xiamen University, Xiamen 361005, China
2.
Joint Key Laboratory of Coastal Study, Xiamen University, Xiamen 361005, China
3.
, Open Laboratory of Ocean & Coast Environmental Geology, Third Institute of Oceanography, State Ocean Administration, Xiamen 361005, China

摘要

摘要: 根据2004年夏季、2005年夏季和2006年夏季3个航次观测的颗粒有机碳(POC)数据,表层POC含量的分布表现出近岸高、远岸低的特点,表层和次表层POC含量的高值区出现在东山以东以及南澳附近上升流区。沿岸流较强的2005年和2006年航次具有相对丰富的总悬浮颗粒物(TSM)含量。浮游植物是该区POC的主要来源。各航次的POC含量与叶绿素a(Chl a)含量正相关,所有航次统计的Chl a/POC与Chl a呈正相关,上升流区Chl a/POC偏小,上升流较强的航次高Chl a区的Chl a/POC也偏小,反映了上升流与高营养转换效率浮游生物生态在空间和时间上的联系。根据Chl a/POC~Chl a关系图判断,台湾海峡南部海域1988年、1998年和2004年夏季航次的浮游生物营养转换效率受到相对抑制,而在上升流信号较强的2005年和2006年夏季航次,上升流区的浮游生物高营养转换效率状态得以强化。各航次的POC含量和Chl a/POC比值与TSM含量正相关,POC/TSM比值与TSM负相关,沿岸流带来的陆源悬浮颗粒物通量波动,并没明显干扰台湾海峡南部以海洋浮游生物生态主导的颗粒有机碳生物地球化学循环格局。
- 颗粒有机碳 /
- 悬浮颗粒物 /
- 上升流 /
- 台湾海峡
Abstract: Particulate organic carbon was analysed in the south of Taiwan Strait in the summer cruises of 2004,2005 and 2006.High level of surface Particulate organic carbon(POC) concentration was found nearshore and decreased seaward. The areas with high value of surface and subsurface POC concentration were located near Dongshan Island and Nan'ao Island. (TSN)TSM were enriched during the cruises with strongly alongshore current such as those of 2005 and 2006.There was a positive correlation between POC concentration and Chi a that implied phytoplankton became the main source of POC. The positive correlation between ratio Chl a/POC and Chl a was found for data of all cruises, but ratio Chl a/POC was small in the high Chl a area adjacent to upwelling centers. This may suggest there was high trophic transfer efficiency in food chain of upwelling dominated area or upwelling event of southern Taiwan Strait. As revealed by scatter plot for the ratio Chl a/POC and Chl a, trophic transfer efficiency was restrained in the summers of 1988, 1998 and 2004, however, it became activity during the summers of 2005 and 2006.For each cruise, there was a positive correlation between POC and TSM, and there was also a positive correlation between ratio Chl a/POC and TSM. There was negative correlation between POC/TSM and TSM for data of all cruises. Obviously fluctuation in TSM, relative steady POC and steady-going relationship between ratio Chl a/POC and Chl a suggested, there was a marine biogenic matter dominated particulate organic carbon system in the southern Taiwan Strait, in despite of the regime with river input particle under strongly alongshore current event.
- particulate organic carbon /
- suspended matter /
- upwelling /
- Taiwan Strait

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