DOI: 10.1029/2018GB006098
论文题名: Direct Observations of Biological Carbon Export From Profiling Floats in the Subtropical North Atlantic
作者: Estapa M.L. ; Feen M.L. ; Breves E.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 3 语种: 英语
英文关键词: biological pump
; carbon cycle
; carbon flux
; mesoscale eddy
; mixed layer
; net primary production
; observational method
; optical property
; sediment trap
; subtropical region
; time series analysis
; Atlantic Ocean
; Atlantic Ocean (North)
学科: Bermuda Atlantic Time-series Study
; bio-optical proxies
; biological pump
; optical sediment trap
; profiling floats
中文摘要: The complex interplay of biological and physical mechanisms comprising the ocean's biological carbon pump has not been well characterized to date, due to the difficulty of observing these mechanisms in situ at adequate spatial and temporal resolution. An annual time series is presented of direct measurements of export production and particle properties collected using optical sediment trap-equipped profiling floats cycling every 1.5–2.5 days. The observations indicate strong variability in particle export and bio-optical properties, influenced by the spring bloom, mesoscale eddy activity, and the mixed layer pump. Temporal and vertical decoupling of fluxes at depths ranging from 150 to 1,000 m was also observed, and remineralization length scales were more variable than predicted by temperature- and oxygen-based models. Net primary production was computed from float observations using a modification of the Carbon-based Productivity Model and used to estimate export and export (e-) ratios, which were compared to predictions of literature export models. Mechanistic models explicitly incorporating ecosystem processes and their depth dependence may perform better at reproducing regional observations collected at high temporal resolution. © 2019. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160144
Appears in Collections: 气候变化与战略
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作者单位: Department of Geosciences, Skidmore College, Saratoga Springs, NY, United States; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States
Recommended Citation:
Estapa M.L.,Feen M.L.,Breves E.. Direct Observations of Biological Carbon Export From Profiling Floats in the Subtropical North Atlantic[J]. Global Biogeochemical Cycles,2019-01-01,33(3)