| Chlorophyll a and primary production in the northeastern Pacific Ocean |
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| 作者姓名： | CHEN Xingqun LIN Rongcheng |
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| 作者单位： | HEN Xingqun（Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China） ;
LIN Rongeheng（Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China） ; |
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| 基金项目： | The China Ocean Mineral Resources Research and Development Association (COMRA) under contract Nos DY105-02-01 and DY105-02-03;the National Key Basic Research Special of China under contract No.G2000078500. |
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| 摘 要： | The primary production and chlorophyll a concentration of picoplankton （0.2 - 2 μm） , nanoplankton （2 - 20μm） and micro- plankton （20 -200 μm） are described in the northeastern Pacific Ocean near the Hawaii Islands during the six survey cruises from 1996 to 2003：DY85-4, DY95-7, DY95-8, DY95-10, DY105-11 and DY105-12.14. The primary production of carbon was in range from 76.8 to 191.9 mg/（m^2 · d） with an average of 116.1 mg/（ m^2 · d） in the east region, and from 73.1 to 222.5 mg/（ m^2 · d） with an average of 127.1 mg/（ m^2 · d） in the west region, similar to the other oligotrophic regions of the Pacific Ocean investigated. The chlorophyll a concentration was about 0.1 mg/m^3 from the surface to the 50 m depth, about 0.2 -0.4 mg/m^3from 50 to 100 m, and gradually decreased below the 100 m depth. The picoplankton accounted for more than 70% of the total chlorophyll a in the upper layer （ surface to 125 m）, but it decreased to less than 50% in depth below 125 m. The nanoplankton and microplankton combined only accounted for less than 30% of the total chlorophyll a in the upper layer, but showed a more even vertical distribution.
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| 关 键 词： | 太平洋东北部 叶绿素a 初级生产力 海洋藻类 |
| 收稿时间： | 2007/4/24 0:00:00 |
| 修稿时间： | 2007/6/21 0:00:00 |
Chlorophyll a and primary production in the northeastern Pacific Ocean |
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| CHEN Xingqun,LIN Rongcheng.Chlorophyll a and primary production in the northeastern Pacific Ocean[J].Acta Oceanologica Sinica,2008,27(1):77-84. |
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| Authors: | CHEN Xingqun and LIN Rongcheng |
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| Institution: | Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | The primary production and chlorophyll a concentration of picoplankton (0.2～2μm),nanoplankton (2～20 μm) and micro- plankton (20～200 μm) are described in the northeastern Pacific Ocean near the Hawaii Islands during the six survey cruises from 1996 to 2003:DY85-4,DY95-7,DY95-8,DY95-10,DY105-11 and DY105-12.14.The primary production of carbon was in range from 76.8 to 191.9 mg/(m2·d) with an average of 116.1 mg/( m2·d) in the east region,and from 73.1 to 222.5 mg/(m2·d) with an average of 127.1 mg/( m2·d) in the west region,similar to the other oligotrophic regions of the Pacific Ocean investigated.The chlorophyll a concentration was about 0.1 mg/m3 from the surface to the 50 m depth,about 0.2-0.4 mg/m3from 50 to 100 m,and gradually decreased below the 100 m depth.The picoplankton accounted for more than 70% of the total chlorophyll a in the upper layer (surface to 125 m),but it decreased to less than 50% in depth below 125 m.The na- noplankton and microplankton combined only accounted for less than 30% of the total chlorophyll a in the upper layer,but showed a more even vertical distribution. |
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| Keywords: | northeastern Pacific Ocean chlorophyll a primary production |
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