DOI: 10.1029/2018GB005983
论文题名: Modeling the Impact of Zooplankton Diel Vertical Migration on the Carbon Export Flux of the Biological Pump
作者: Archibald K.M. ; Siegel D.A. ; Doney S.C.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 2 语种: 英语
英文关键词: biogeochemical cycle
; biogeochemistry
; biological pump
; carbon flux
; diel variation
; ecological impact
; environmental modeling
; euphotic zone
; mesopelagic zone
; phytoplankton
; respiration
; satellite altimetry
; satellite data
; size structure
; vertical migration
; zooplankton
; algae
中文摘要: One pathway of the biological pump that remains largely unquantified in many export models is the active transport of carbon from the surface ocean to the mesopelagic by zooplankton diel vertical migration (DVM). Here, we develop a simple representation of zooplankton DVM and implement it in a global export model as a thought experiment to illustrate the effects of DVM on carbon export and mesopelagic biogeochemistry. The model is driven by diagnostic satellite measurements of net primary production, algal biomass, and phytoplankton size structure. Due to constraints on available satellite data, the results are restricted to the latitude range from 60°N to 60°S. The modeled global export flux from the base of the euphotic zone was 6.5 PgC/year, which represents a 14% increase over the export flux in model runs without DVM. The mean (± standard deviation, SD) proportional contribution of the DVM-mediated export flux to total carbon export, averaged over the global domain and the climatological seasonal cycle, was 0.16 ± 0.04 and the proportional contribution of DVM activity to total respiration within the twilight zone was 0.16 ± 0.06. Adding DVM activity to the model also resulted in a deep local maximum in the oxygen utilization profile. The model results were most sensitive to the assumptions for the fraction of individuals participating in DVM, the fraction of fecal pellets produced in the euphotic zone, and the fraction of grazed carbon that is metabolized. ©2019. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160150
Appears in Collections: 气候变化与战略
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作者单位: Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Earth Research Institute and Department of Geography, University of California, Santa Barbara, CA, United States; Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States
Recommended Citation:
Archibald K.M.,Siegel D.A.,Doney S.C.. Modeling the Impact of Zooplankton Diel Vertical Migration on the Carbon Export Flux of the Biological Pump[J]. Global Biogeochemical Cycles,2019-01-01,33(2)