DOI: 10.1002/2014GB004913
Scopus记录号: 2-s2.0-84941877957
论文题名: Decoupling of net community and export production on submesoscales in the Sargasso Sea
作者: Estapa M ; L ; , Siegel D ; A ; , Buesseler K ; O ; , Stanley R ; H ; R ; , Lomas M ; W ; , Nelson N ; B
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 8 起始页码: 1266
结束页码: 1282
语种: 英语
英文关键词: export production
; net community production
; Sargasso Sea carbon flux balance
; submesoscale biogeochemical variability
Scopus关键词: carbon flux
; mesoscale meteorology
; net ecosystem production
; sampling
; spatial resolution
; trophic level
; upper ocean
; Atlantic Ocean
; Sargasso Sea
英文摘要: Determinations of the net community production (NCP) in the upper ocean and the particle export production (EP) should balance over long time and large spatial scales. However, recent modeling studies suggest that a horizontal decoupling of flux-regulating processes on submesoscales (≤10 km) could lead to imbalances between individual determinations of NCP and EP. Here we sampled mixed-layer biogeochemical parameters and proxies for NCP and EP during 10, high-spatial resolution (~2 km) surface transects across strong physical gradients in the Sargasso Sea. We observed strong biogeochemical and carbon flux variability in nearly all transects. Spatial coherence among measured biogeochemical parameters within transects was common but rarely did the same parameters covary consistently across transects. Spatial variability was greater in parameters associated with higher trophic levels, such as chlorophyll in >5.0 μm particles, and variability in EP exceeded that of NCP in nearly all cases. Within sampling transects, coincident EP and NCP determinations were uncorrelated. However, when averaged over each transect (30 to 40 km in length), we found NCP and EP to be significantly and positively correlated (R = 0.72, p = 0.04). Transect-averaged EP determinations were slightly smaller than similar NCP values (Type-II regression slope of 0.93, standard deviation = 0.32) but not significantly different from a 1:1 relationship. The results show the importance of appropriate sampling scales when deriving carbon flux budgets from upper ocean observations. ©2015. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77947
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Now at Department of Geosciences, Skidmore College, Saratoga Springs, NY, United States; Earth Research Institute and Department of Geography, University of California, Santa Barbara, CA, United States; Now at Department of Chemistry, Wellesley College, Wellesley, MA, United States; Bermuda Institute of Ocean Sciences, St. Georges, Bermuda; Now at Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
Recommended Citation:
Estapa M,L,, Siegel D,et al. Decoupling of net community and export production on submesoscales in the Sargasso Sea[J]. Global Biogeochemical Cycles,2015-01-01,29(8)