DOI: 10.1002/2013GB004704
Scopus记录号: 2-s2.0-84902345728
论文题名: The triple oxygen isotope tracer of primary productivity in a dynamic ocean model
作者: Nicholson D ; , Stanley R ; H ; R ; , Doney S ; C
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 5 起始页码: 538
结束页码: 552
语种: 英语
英文关键词: carbon
; gross primary production
; oxygen
; photosynthesis
; primary production
; triple oxygen isotope
Scopus关键词: Bioinformatics
; Blooms (metal)
; Carbon
; Dissolved oxygen
; Ecology
; Isotopes
; Oceanography
; Oxygen
; Photosynthesis
; Dynamic ocean modeling
; Gross primary production
; Northern Hemispheres
; Oxygen isotopic composition
; Photosynthetic production
; Primary production
; Steady state equation
; Triple oxygen isotopes
; Computer simulation
; biogeochemical cycle
; estimation method
; isotopic composition
; mixed layer
; Northern Hemisphere
; oxygen isotope
; primary production
; seasonal variation
英文摘要: The triple oxygen isotopic composition of dissolved oxygen ( 17Δdis) was added to the ocean ecosystem and biogeochemistry component of the Community Earth System Model, version 1.1.1. Model simulations were used to investigate the biological and physical dynamics of 17Δdis and assess its application as a tracer of gross photosynthetic production (gross oxygen production (GOP)) of O2 in the ocean mixed layer. The model reproduced large-scale patterns of 17Δdis found in observational data across diverse biogeographical provinces. Mixed layer model performance was best in the Pacific and had a negative bias in the North Atlantic and a positive bias in the Southern Ocean. Based on model results, the steady state equation commonly used to calculate GOP from tracer values overestimated the globally averaged model GOP by 29%. Vertical entrainment/mixing and the time rate of change of 17Δdis were the two largest sources of bias when applying the steady state method to calculate GOP. Entrainment/mixing resulted in the largest overestimation in midlatitudes and during summer and fall and almost never caused an underestimation of GOP. The tracer time rate of change bias resulted both in underestimation of GOP (e.g., during spring blooms at high latitudes) and overestimation (e.g., during the summer following a bloom). Seasonally, bias was highest in the fall (September-October-November in the Northern Hemisphere, March-April-May in the Southern), overestimating GOP by 62%, globally averaged. Overall, the steady state method was most accurate in equatorial and low-latitude regions where it estimated GOP to within ±10%. Field applicable correction terms are derived for entrainment and mixing that capture 86% of model vertical bias and require only mixed layer depth history and triple oxygen isotope measurements from two depths. Key Points The triple oxygen isotope tracer system was added to global ocean model Model results evaluated against all available triple oxygen isotope data Biases in steady state equation for production quantified ©2014. 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/77490
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
Recommended Citation:
Nicholson D,, Stanley R,H,et al. The triple oxygen isotope tracer of primary productivity in a dynamic ocean model[J]. Global Biogeochemical Cycles,2014-01-01,28(5)