globalchange  > 气候减缓与适应
DOI: 10.1029/2018JG004392
Scopus记录号: 2-s2.0-85051173622
论文题名:
Alternative Particle Formation Pathways in the Eastern Tropical North Pacific's Biological Carbon Pump
作者: Cavan E.L.; Giering S.L.C.; Wolff G.A.; Trimmer M.; Sanders R.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:7
起始页码: 2198
结束页码: 2211
语种: 英语
英文关键词: biological carbon pump ; fast-sinking particles ; lipid biomarkers ; particle aggregation ; particulate organic carbon
英文摘要: A fraction of organic carbon produced in the oceans by phytoplankton sinks storing 5–15 gigatonnes of carbon annually in the ocean interior. The accepted paradigm is that rapid aggregation of phytoplankton cells occurs, forming large, fresh particles which sink quickly; this concept is incorporated into ecosystem models used to predict the future climate. Here we demonstrate a slower, less efficient export pathway in the Eastern Tropical North Pacific. Lipid biomarkers suggest that the large, fast-sinking particles found beneath the mixed layer are compositionally distinct from those found in the mixed layer and thus not directly and efficiently formed from phytoplankton cells. We postulate that they are formed from the in situ aggregation of smaller, slow-sinking particles over time in the mixed layer itself. This export pathway is likely widespread where smaller phytoplankton species dominate. Its lack of representation in biogeochemical models suggests that they may be currently overestimating the ability of the oceans to store carbon if large, fast-sinking, labile particles dominate simulated particle export. ©2018. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113562
Appears in Collections:气候减缓与适应

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作者单位: National Oceanography Centre, European Way, Southampton, United Kingdom; National Oceanography Centre, University of Southampton, Southampton, United Kingdom; Now at Institute for Marine and Antarctic Studies, University of Tasmania, Tasmania, Australia; School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; School of Biological and Chemical Sciences, Queen Mary University London, London, United Kingdom

Recommended Citation:
Cavan E.L.,Giering S.L.C.,Wolff G.A.,et al. Alternative Particle Formation Pathways in the Eastern Tropical North Pacific's Biological Carbon Pump[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(7)
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