DOI: 10.1029/2018GB005886
论文题名: Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry
作者: Aumont O. ; Maury O. ; Lefort S. ; Bopp L.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 11 语种: 英语
英文关键词: aquatic organism
; biogeochemistry
; biomass
; carbon cycle
; carbon flux
; carbon sink
; dissolved organic carbon
; marine ecosystem
; marine environment
; mesopelagic zone
; organic matter
; trophic level
; vertical migration
学科: biogeochemistry
; carbon cycle
; diurnal vertical migration
; ecosystem
; export
; ocean
中文摘要: Diurnal vertical migration (DVM) of marine organisms is an ubiquitous phenomenon in the ocean that generates an active vertical transport of organic matter. However, the magnitude and consequences of this flux are largely unknown and are currently overlooked in ocean biogeochemical models. Here we present a global model of pelagic ecosystems based on the ocean biogeochemical model NEMO-PISCES that is fully coupled to the upper trophic levels model Apex Predators ECOSystem Model, which includes an explicit description of migrating organisms. Evaluation of the model behavior proved to be challenging due to the scarcity of suitable observations. Nevertheless, the model appears to be able to simulate approximately both the migration depth and the relative biomass of migrating organisms. About one third of the epipelagic biomass is predicted to perform DVM. The flux of carbon driven by DVM is estimated to be 1.05 ± 0.15 PgC/year, about 18% of the passive flux of carbon due to sinking particles at 150 m. Comparison with local studies suggests that the model captures the correct magnitude of this flux. Oxygen is decreased in the mesopelagic domain by about 5 mmol m−3 relative to simulations of an ocean without DVM. Our study concludes that DVM drives a significant and very efficient flux of carbon to the mesopelagic domain, similar in magnitude to the transport of DOC. Relative to a model run without DVM, the consequences of this flux seem to be quite modest on oxygen, due to compensating effects between DVM and passive fluxes. ©2018. 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/160182
Appears in Collections: 气候变化与战略
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作者单位: Laboratoire d'Océanographie et du Climat: Expérimentations et Approches Numériques (LOCEAN), IRD-IPSL, Paris, France; IRD (Institut de Recherche pour le Développement), UMR 248, MARBEC, Sète, France; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), IPSL, CEA–Orme des Merisiers, Gif-sur-Yvette, France; Laboratoire de Météorologie Dynamique, Ecole Normale Supérieure-PSL Res. Univ., CNRS, Sorbonne Université, Ecole Polytechnique, Paris, France
Recommended Citation:
Aumont O.,Maury O.,Lefort S.,et al. Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry[J]. Global Biogeochemical Cycles,2018-01-01,32(11)