DOI: 10.1002/2017GB005843
论文题名: Spatially Explicit, Regional-Scale Simulation of Lake Carbon Fluxes
作者: Zwart J.A. ; Hanson Z.J. ; Vanderwall J. ; Bolster D. ; Hamlet A. ; Jones S.E.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 9 语种: 英语
英文关键词: biogeochemical cycle
; carbon cycle
; carbon flux
; dissolved inorganic carbon
; hydrology
; lacustrine environment
; simulation
; spatiotemporal analysis
; Northern Highlands Lake District
; United States
; Wisconsin
学科: lake carbon cycle
; lake hydrology
; regional model
中文摘要: Lakes are areas of intense biogeochemical processing in the landscape, contributing significantly to the global carbon cycle despite their small areal coverage. However, current large-scale estimates of lake biogeochemical fluxes are all generated by multiplying a mean observed areal rate by regional or global lake surface area, which ignores important heterogeneous spatial and temporal processes that regulate lake carbon cycling. We have developed a process-based model that integrates core scientific knowledge in hydrology, biogeochemistry, and ecology that is specifically designed to be applied over large geographic regions to hindcast or forecast regional lake carbon fluxes. We used our model to simulate daily carbon fluxes and pools for 3,675 lakes in the Northern Highlands Lake District from 1980–2010 and produced spatial and seasonal patterns consistent with observations. Variabilities in lake carbon fluxes were well predicted by relatively simple hydrologic metrics, such as the fraction of hydrologic export as evaporation (FHEE). Overall, lakes with a high FHEE processed a greater percentage of carbon inputs in the simulations than lakes with a low FHEE, but low-FHEE lakes ultimately processed more total carbon because of greater carbon inputs. Large lakes with low FHEE and high external loading of dissolved inorganic carbon contributed most to total CO2 emissions for the Northern Highlands Lake District, and our model estimated that 78% of total CO2 emissions from lakes to the atmosphere originated from external loads of dissolved inorganic carbon. By better characterizing the unique biogeochemical processes for each individual lake, regional estimates of carbon fluxes are more accurately determined. ©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/160203
Appears in Collections: 气候变化与战略
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作者单位: Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, United States; Now at Integrated Information Dissemination Division, United States Geological Survey, Middleton, WI, United States; Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN, United States
Recommended Citation:
Zwart J.A.,Hanson Z.J.,Vanderwall J.,et al. Spatially Explicit, Regional-Scale Simulation of Lake Carbon Fluxes[J]. Global Biogeochemical Cycles,2018-01-01,32(9)