An estimation of annual new production and carbon fluxes in the northeast Atlantic Ocean during 2001 -: art. no. C07S13
An estimation of annual new production and carbon fluxes in the northeast Atlantic Ocean during 2001 -: art. no. C07S13
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DOI：
10.1029/2004jc002616
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发表时间：
2005-07-07
影响因子：
3.6
通讯作者：
Caniaux, G
中科院分区：
文献类型：
--
作者：
Fernández, C;Raimbault, P;Caniaux, G
[1]在大西洋东北海盆（西经16度- 22度，北纬38度- 45度）进行了为期1年的海洋多学科中阶（POMME）试验，采用C-13/N-15双同位素技术估算了碳氮吸收率。初产速率从冬季的2.26 mmol L-1 d（-1）到春季的最大值7.8 mmol L-1 d（-1）不等。入冬以来硝态氮同化强度较大，在水柱前80 m深度处，硝态氮同化量为3 ~ 7 mmmol m(-2) d（-1）。在春季，速率增加到5 ~ 9mmmol m(-2) d（-1）。夏末NO3-吸收率接近冬季值。铵同化活性平衡了各季节对硝态氮的吸收。季节f值冬季接近0.28，春季增大至0.34，夏末减小至0.25。整个POMME区域的年碳吸收率为16.9 mol cm (-2) yr（-1）。根据这一结果，每年的新产量可以估计为5.7摩尔立方米（-2）年（-1）。
[1] A dual C-13/N-15 isotopic technique was used to estimate carbon and nitrogen uptake rates during the 1-year-long Programme Ocean Multidisciplinaire Meso Echelle (POMME) experiment in the northeast basin of the Atlantic Ocean (16 degrees - 22 degrees W, 38 degrees - 45 degrees N). Rates of primary production ranged from 2.26 mmoles L-1 d(-1) in winter to maximum surface values of 7.8 mmoles L-1 d(-1) during the spring season. Nitrate assimilation was intense since the beginning of winter and accounted for 3 - 7 mmoles m(-2) d(-1) in the first 80 m depth of the water column. Rates increased to 5 - 9 mmoles m(-2) d(-1) during the spring season. NO3- uptake rates during the late summer season were close to winter values. Ammonium assimilation activity balanced the uptake of nitrate for all seasons. The seasonal f ratio was close to 0.28 in winter, increased to 0.34 in spring, and, finally, decreased to 0.25 in late summer. Annual carbon uptake rates for the entire POMME area accounted for 16.9 moles C m(-2) yr(-1). From this result, annual new production could be estimated to 5.7 moles C m(-2) yr(-1).