Biological production in the NE Pacific and its influence on air‐sea CO2 flux: Evidence from dissolved oxygen isotopes and O2/Ar
Biological production in the NE Pacific and its influence on air‐sea CO2 flux: Evidence from dissolved oxygen isotopes and O2/Ar
复制标题
东北太平洋的生物生产及其对海气 CO2 通量的影响：来自溶解氧同位素和 O2/Ar 的证据
DOI：
10.1029/2011jc007450
复制
发表时间：
2012
影响因子：
--
通讯作者：
M. Church
中科院分区：
文献类型：
--
作者：
L. Juranek;P. Quay;R. Feely;Deirdre Lockwood;D. Karl;M. Church
[1]我们使用三重氧同位素和O2/Ar方法确定了东北太平洋两个春季和两个夏末经向横断面的总光合O2产生率（GOP）和群落净O2产生率（NCP）。观测到的GOP和NCP在亚热带（分别为89 - 9和8.3 - 1.3 mmol O2 m-2 d-1）和亚北极（193 - 16和16.3 - 3.8 mmol O2 m-2 d-1）与以前确定的速率在每个地区的时间序列站，验证这些网站的区域代表性。在春季32 ° N到夏季40 ° N的过渡带叶绿素锋（TZCF），GOPNP比邻近地区高2 -4 °。与TZCF一致，在表面硝酸盐浓度的增加和浮游植物群落组成的广泛变化进行了观察。HPLC色素数据表明在原生植物（例如，在春季和夏季巡航中，TZCF的生物标志物为颗石藻（coccolithophore），在春季巡航中为硅藻生物标志物。在所有四次考察中，在TZCF还观察到遥感表面颗粒无机碳浓度增加，表明颗石藻的生产可能有助于TZCF生产力的提高。经向趋势在观察到的海气CO2通量在每次巡航相似的生物诱导的CO2通量（NCP），但与叠印的海气CO2交换夏季变暖的响应。一个简单的碳预算区域CO2通量气候学的基础上证明了NCP的重要性，每年的净海气CO2吸收，虽然缓慢的海气平衡和季节性溶解度的影响模糊了这个词。
[1] We determine rates of gross photosynthetic O2 production (GOP) and net community O2 production (NCP) using the triple oxygen isotope and O2/Ar approach on two spring and two late summer meridional transects of the NE Pacific. Observed GOP and NCP in the subtropical (89 � 9 and 8.3 � 1.3 mmol O2 m � 2 d � 1 , respectively) and subarctic (193 � 16 and 16.3 � 3.8 mmol O2 m � 2 d � 1 ) were in agreement with rates previously determined at time series stations in each region, validating the regional representativeness of these sites. At the transition zone chlorophyll front (TZCF), which migrates seasonally from 32 � N in spring to 40 � N in summer,GOPandNCPwere elevated by2–4� compared to adjacent areas. Coincident with the TZCF, increases in surface nitrate concentration and extensive changes in phytoplankton community composition were observed. HPLC pigment data indicated substantial increases in a prymnesiophyte (e.g., coccolithophore) biomarker at the TZCF on aspring and summer cruise, and a diatom biomarker on thespring cruise. Increases in remotely sensed surface particulate inorganic carbon concentration were also observed at the TZCF on all four cruises, indicating that coccolithophore production may contribute to increased productivity at the TZCF. Meridional trends in observed air-sea CO2 flux on each cruise resembled those of the biologically induced CO2 flux (NCP), but with an overprinting of the response of air-sea CO2 exchange to summer warming. A simple carbon budget based on regional CO2 flux climatology demonstrates the importance of NCP for net annual air-sea CO2 uptake, although slow air-sea equilibration and seasonal solubility effects obscure this term.
技术说明：根据氧三重同位素测量对水产总产量进行一致计算
影响因子：
4.9
作者：
Kaiser J
通讯作者：
Kaiser J