Verticla profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea

Wu Yu-lin; Zhou Cheng-xu; Zhang Yong-shan

doi:10.1007/BF02846614

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Verticla profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea

Updated：2023-05-16

- Verticla profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea
- Journal of Oceanology and Limnology Vol. 20, Issue 1, Pages: 74-80(2002)
- Affiliations：
  
  Institute of Oceanology Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/BF02846614
  CLC：
- Published：2002
- Accepted：
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Yu-lin, W., Cheng-xu, Z. & Yong-shan, Z. Verticla profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea., Chin. J. Ocean. Limnol. 20, 74–80 (2002). https://doi.org/10.1007/BF02846614
DOI：

Yu-lin, W., Cheng-xu, Z. & Yong-shan, Z. Verticla profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea., Chin. J. Ocean. Limnol. 20, 74–80 (2002). https://doi.org/10.1007/BF02846614 DOI：

摘要

Abstract

Vertical profiles of chl-a and primary productivity in the middle continental shelf area and eddy area of the East China Sea were studied using data from a cruise in the East China Sea in February to March

1997 and a cruise in July

1998. The results showed that chl-a vertical distribution closely related to in situ hydrological and nutrient conditions. Chla-a concentration ranged from 0.22 to 0.35 mg/m3 and 0.93–1.09 mg/m3 in the eddy area and in the middle continental shelf area

respectively. In both areas

chl-a concentrations in deep layers were slightly higher than those in shallow layers

but was of the same order of magnitude. In summer

when a thermocline existed in the water column

highest chl-a concentrations appeared at the base of the thermocline layers in both areas. In the eddy area

chl-a concentration maximized at 31.743 mg/m3

and averaged 1.143 mg/m3 below 30 m depth. In the middle continental shelf area

the highest chl-a concentration was 2.120 mg/m3

the average was 1.168 mg/m3. The primary productivity reached 1418.76 mgC/(m2·d) in summer and 1360.69 mgC/(m2·d) in winter. In the eddy area

the primary productivity was 787.50 mgC/(m2·d) in summer and 159.04 mgC/(m2·d) in winter. Vertical carbon sinking rate from the deep layer to the bottom in both areas is also discussed in this paper.

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