DOI: 10.1002/2017JC013030
Scopus记录号: 2-s2.0-85042138014
论文题名: Assessing the Variability in the Relationship Between the Particulate Backscattering Coefficient and the Chlorophyll a Concentration From a Global Biogeochemical-Argo Database
作者: Barbieux M. ; Uitz J. ; Bricaud A. ; Organelli E. ; Poteau A. ; Schmechtig C. ; Gentili B. ; Obolensky G. ; Leymarie E. ; Penkerc'h C. ; D'Ortenzio F. ; Claustre H.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1229
结束页码: 1250
语种: 英语
英文关键词: BGC-Argo profiling floats
; optical properties
; particle backscattering
; phytoplankton biomass
; world's oceans
Scopus关键词: assessment method
; backscatter
; biomass
; chlorophyll a
; concentration (composition)
; open ocean
; optical property
; phytoplankton
; population distribution
; population dynamics
; relative abundance
; surface layer
英文摘要: Characterizing phytoplankton distribution and dynamics in the world's open oceans requires in situ observations over a broad range of space and time scales. In addition to temperature/salinity measurements, Biogeochemical-Argo (BGC-Argo) profiling floats are capable of autonomously observing at high-frequency bio-optical properties such as the chlorophyll fluorescence, a proxy of the chlorophyll a concentration (Chla), the particulate backscattering coefficient (bbp), a proxy of the stock of particulate organic carbon, and the light available for photosynthesis. We analyzed an unprecedented BGC-Argo database of more than 8,500 multivariable profiles collected in various oceanic conditions, from subpolar waters to subtropical gyres. Our objective is to refine previously established Chla versus bbp relationships and gain insights into the sources of vertical, seasonal, and regional variability in this relationship. Despite some regional, seasonal and vertical variations, a general covariation occurs at a global scale. We distinguish two main contrasted situations: (1) concomitant changes in Chla and bbp that correspond to actual variations in phytoplankton biomass, e.g., in subpolar regimes; (2) a decoupling between the two variables attributed to photoacclimation or changes in the relative abundance of nonalgal particles, e.g., in subtropical regimes. The variability in the bbp:Chla ratio in the surface layer appears to be essentially influenced by the type of particles and by photoacclimation processes. The large BGC-Argo database helps identifying the spatial and temporal scales at which this ratio is predominantly driven by one or the other of these two factors. © 2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114517
Appears in Collections: 气候减缓与适应
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作者单位: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Observatoire Océanologique de Villefranche, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, United Kingdom; OSU Ecce Terra, UMS 3455, CNRS and Université Pierre et Marie Curie, Paris 6, Paris, France; ERIC Euro-Argo, Plouzané, 29280, France
Recommended Citation:
Barbieux M.,Uitz J.,Bricaud A.,et al. Assessing the Variability in the Relationship Between the Particulate Backscattering Coefficient and the Chlorophyll a Concentration From a Global Biogeochemical-Argo Database[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)