DOI: 10.1002/2016MS000737
Scopus记录号: 2-s2.0-85013472577
论文题名: Incorporating a prognostic representation of marine nitrogen fixers into the global ocean biogeochemical model HAMOCC
作者: Paulsen H ; , Ilyina T ; , Six K ; D ; , Stemmler I
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 1 起始页码: 438
结束页码: 464
语种: 英语
英文关键词: Biogeochemistry
; Carbon
; Nitrogen
; Oceanography
; Physiological models
; Phytoplankton
; Biogeochemical cycling
; Biogeochemical modeling
; Environmental conditions
; Ocean biogeochemistry
; Physiological characteristics
; Simulated distribution
; Temperature dependencies
; Vertical distributions
; Nitrogen fixation
; biogeochemical cycle
; biogeochemistry
; cyanobacterium
; environmental modeling
; euphotic zone
; global ocean
; growth response
; marine environment
; nitrogen fixation
; phytoplankton
; seasonal variation
; vertical distribution
; Pacific Ocean
; Trichodesmium
英文摘要: Nitrogen (N2) fixation is a major source of bioavailable nitrogen to the euphotic zone, thereby exerting an important control on ocean biogeochemical cycling. This paper presents the incorporation of prognostic N2 fixers into the HAMburg Ocean Carbon Cycle model (HAMOCC), a component of the Max Planck Institute Earth System Model (MPI-ESM). Growth dynamics of N2 fixers in the model are based on physiological characteristics of the cyanobacterium Trichodesmium. The applied temperature dependency confines diazotrophic growth and N2 fixation to the tropical and subtropical ocean roughly between 40°S and 40°N. Simulated large-scale spatial patterns compare well with observations, and the global N2 fixation rate of 135.6 Tg N yr−1 is within the range of current estimates. The vertical distribution of N2 fixation also matches well the observations, with a major fraction of about 85% occurring in the upper 20 m. The observed seasonal variability at the stations BATS and ALOHA is reasonably reproduced, with highest fixation rates in northern summer/fall. Iron limitation was found to be an important factor in controlling the simulated distribution of N2 fixation, especially in the Pacific Ocean. The new model component considerably improves the representation of present-day N2 fixation in HAMOCC. It provides the basis for further studies on the role of diazotrophs in global biogeochemical cycles, as well as on the response of N2 fixation to changing environmental conditions. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75838
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Max Planck Institute for Meteorology, Hamburg, Germany; International Max Planck Research School on Earth System Modelling, Hamburg, Germany
Recommended Citation:
Paulsen H,, Ilyina T,, Six K,et al. Incorporating a prognostic representation of marine nitrogen fixers into the global ocean biogeochemical model HAMOCC[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)