DOI: 10.1111/gcb.13902
Scopus记录号: 2-s2.0-85031427823
论文题名: CO2 evasion from boreal lakes: Revised estimate, drivers of spatial variability, and future projections
作者: Hastie A. ; Lauerwald R. ; Weyhenmeyer G. ; Sobek S. ; Verpoorter C. ; Regnier P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 2 起始页码: 711
结束页码: 728
语种: 英语
英文关键词: boreal
; carbon budget
; climate change
; CO2
; future projections
; lake
; precipitation
; terrestrial NPP
Scopus关键词: carbon budget
; carbon dioxide
; environmental assessment
; future prospect
; lake
; net primary production
; precipitation (chemistry)
; reservoir
; spatial variation
英文摘要: Lakes (including reservoirs) are an important component of the global carbon (C) cycle, as acknowledged by the fifth assessment report of the IPCC. In the context of lakes, the boreal region is disproportionately important contributing to 27% of the worldwide lake area, despite representing just 14% of global land surface area. In this study, we used a statistical approach to derive a prediction equation for the partial pressure of CO2 (pCO2) in lakes as a function of lake area, terrestrial net primary productivity (NPP), and precipitation (r2 =.56), and to create the first high-resolution, circumboreal map (0.5°) of lake pCO2. The map of pCO2 was combined with lake area from the recently published GLOWABO database and three different estimates of the gas transfer velocity k to produce a resulting map of CO2 evasion (FCO2). For the boreal region, we estimate an average, lake area weighted, pCO2 of 966 (678–1,325) μatm and a total FCO2 of 189 (74–347) Tg C year−1, and evaluate the corresponding uncertainties based on Monte Carlo simulation. Our estimate of FCO2 is approximately twofold greater than previous estimates, as a result of methodological and data source differences. We use our results along with published estimates of the other C fluxes through inland waters to derive a C budget for the boreal region, and find that FCO2 from lakes is the most significant flux of the land-ocean aquatic continuum, and of a similar magnitude as emissions from forest fires. Using the model and applying it to spatially resolved projections of terrestrial NPP and precipitation while keeping everything else constant, we predict a 107% increase in boreal lake FCO2 under emission scenario RCP8.5 by 2100. Our projections are largely driven by increases in terrestrial NPP over the same period, showing the very close connection between the terrestrial and aquatic C cycle. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110515
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Biogeochemistry and Earth System Modelling, Department of Geoscience, Environment and Society, Université Libre de Bruxelles, Bruxelles, Belgium; College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Department of Ecology and Genetics/Limnology, Uppsala University (UU), Uppsala, Sweden; Laboratoire d'Océanologie et de Géosciences (LOG), Université du Littoral Côte d'Opale, CNRS, UMR 8187, University of Lille, Wimereux, France
Recommended Citation:
Hastie A.,Lauerwald R.,Weyhenmeyer G.,et al. CO2 evasion from boreal lakes: Revised estimate, drivers of spatial variability, and future projections[J]. Global Change Biology,2018-01-01,24(2)