| DOI: | 10.1002/2014GL061824
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| 论文题名: | Upscaling carbon dioxide emissions from lakes |
| 作者: | Seekell D.A.; Carr J.A.; Gudasz C.; Karlsson J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9630
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| EISSN: | 1944-9361
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| 出版年: | 2014
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| 卷: | 41, 期:21 | | 起始页码: | 7555
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| 结束页码: | 7559
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| 语种: | 英语
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| 英文关键词: | aggregation bias
; correction factor
; global limnology
; moment expansion
; pCO2
; upscaling
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| Scopus关键词: | Budget control
; Carbon
; Global warming
; Lakes
; Aggregate datum
; Carbon dioxide emissions
; Chemical factors
; Correction factors
; Data aggregation
; Moment expansion
; pCO2
; Upscaling
; Carbon dioxide
; accuracy assessment
; carbon dioxide
; carbon emission
; carbon flux
; covariance analysis
; estimation method
; lake ecosystem
; statistical analysis
; upscaling
; Sweden
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| 英文摘要: | Quantifying CO2 fluxes from lakes to the atmosphere is important for balancing regional and global-scale carbon budgets. CO2 emissions are estimated through statistical upscaling procedures that aggregate data from a large number of lakes. However, aggregation can bias flux estimates if the physical and chemical factors determining CO2 exchange between water and the atmosphere are not independent. We evaluated the magnitude of aggregation biases with moment expansions and pCO2 data from 5140 Swedish lakes. The direction of the aggregation bias depends on lake size; mean flux was overestimated by 4% for small lakes (0.01-0.1 km2) but underestimated by 13% for large lakes (100-1000 km2). Simple covariance-based correction factors were generated to adjust for upscaling biases. These correction factors represent an easily interpretable and implemented approach to improving the accuracy of regional and global estimates of lake CO2 emissions. Key Points Data aggregation biases estimates of regional and global lake CO2 emissionsThe direction of bias depends on lake sizeCovariance-based correction factors adjust for aggregation bias ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912139147&doi=10.1002%2f2014GL061824&partnerID=40&md5=d16693eeb075c842595aa6a07daeaa61
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6894
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden
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| Recommended Citation: | |
Seekell D.A.,Carr J.A.,Gudasz C.,et al. Upscaling carbon dioxide emissions from lakes[J]. Geophysical Research Letters,2014-01-01,41(21).
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