Carbon export by small particles in the Norwegian Sea
Carbon export by small particles in the Norwegian Sea
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DOI：
10.1002/2014gl059244
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发表时间：
2014-04-28
影响因子：
5.2
通讯作者：
Mork, Kjell Arne
中科院分区：
文献类型：
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作者：
Dall'Olmo, Giorgio;Mork, Kjell Arne
尽管深海在控制地球气候方面发挥着根本作用，但目前对全球有机碳向深海输出的估计受到较大不确定性的影响。这些不确定性是由于缺乏观测以及用于估计碳输出的方法和假设之间存在分歧。因此，需要补充观测来减少这些不确定性。在这里，我们表明，光学后向散射测量的Bio-Argo浮标可以检测到一个季节性的碳输出通量在挪威海。这种输出最有可能是由于小颗粒（即，0.2-20米），与公布的出口值相当，有助于长期固碳。我们的研究结果强调了小颗粒和物理混合在生物碳泵中的重要性，并支持使用自主平台作为工具，以提高我们对海洋碳循环的机械理解。关键点Bio-Argo浮标可以跟踪中层区域的小颗粒小颗粒的输出通量显着小颗粒有助于长期的碳封存
Despite its fundamental role in controlling the Earth's climate, present estimates of global organic carbon export to the deep sea are affected by relatively large uncertainties. These uncertainties are due to lack of observations as well as disagreement among methods and assumptions used to estimate carbon export. Complementary observations are thus needed to reduce these uncertainties. Here we show that optical backscattering measured by Bio-Argo floats can detect a seasonal carbon export flux in the Norwegian Sea. This export was most likely due to small particles (i.e., 0.2-20 m), was comparable to published export values, and contributed to long-term carbon sequestration. Our findings highlight the importance of small particles and of physical mixing in the biological carbon pump and support the use of autonomous platforms as tools to improve our mechanistic understanding of the ocean carbon cycle.Key Points Bio-Argo floats can track small particles in the mesopelagic region Export fluxes from small particles were significant Small particles contributed to long-term carbon sequestration