Estimating methane emissions from northern lakes using ice-bubble surveys
The magnitude and variability in methane (CH4) emissions from lakes are uncertain due to limitations in methods for quantifying the patchiness of ebullition (bubbling). We present a field method to estimate an important and highly uncertain source: ebullition from northern lakes. We defined four cla...
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ftpurdueuniv:oai:docs.lib.purdue.edu:easpubs-1021 2023-07-02T03:33:59+02:00 Estimating methane emissions from northern lakes using ice-bubble surveys Anthony, Katey W. Vas, Drago A. Brosius, Laura Chapin, F. Stuart, III Zimov, Sergey A. Zhuang, Qianlai 2010-01-01T08:00:00Z https://docs.lib.purdue.edu/easpubs/22 https://doi.org/10.4319/lom.2010.8.592 http://www.wap.aslo.orgwww.wap.aslo.org/lomethods/free/2010/0592.pdf unknown Purdue University https://docs.lib.purdue.edu/easpubs/22 doi:10.4319/lom.2010.8.592 http://www.wap.aslo.orgwww.wap.aslo.org/lomethods/free/2010/0592.pdf Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications text 2010 ftpurdueuniv https://doi.org/10.4319/lom.2010.8.592 2023-06-12T20:42:58Z The magnitude and variability in methane (CH4) emissions from lakes are uncertain due to limitations in methods for quantifying the patchiness of ebullition (bubbling). We present a field method to estimate an important and highly uncertain source: ebullition from northern lakes. We defined four classes of CH4 bubble clusters trapped in lake ice representing distinct types of biogenic ebullition seeps that differed in flux rate. Mean annual ebullition determined through long-term (up to 700 d) continuous flux measurements of 31 seeps in three Siberian and one Alaskan lake was (mean ± standard error, 4-10 seeps per class; g CH4 seep –1 y –1): A, 6 ± 4; B, 48 ± 11; C, 354 ± 52; Hotspot, 1167 ± 177. Discrete-seep ebullition comprised up to 87% of total emissions from Siberian lakes when diffusive flux and background and seep ebullition were considered together. Including seep ebullition increased previous estimates of lake CH4 emissions based on traditional methods 5- to 8-fold for Siberian and Alaskan lakes. Linking new ebullition estimates to an established biogeochemical model, the Terrestrial Ecosystem Model, increased previous estimates of regional terrestrial CH4 emissions 3- to 7-fold in Siberia. Assessment of the method revealed that ebullition seeps are an important component of the terrestrial CH4 budget. They are identifiable by seep type by independent observers; they are consistent predictors of flux rate in both Siberia and Alaska; and they allow quantification of what was previously a large source of uncertainty in upscaling CH4 emissions from lakes to regions. Text Alaska Siberia Purdue University: e-Pubs |
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The magnitude and variability in methane (CH4) emissions from lakes are uncertain due to limitations in methods for quantifying the patchiness of ebullition (bubbling). We present a field method to estimate an important and highly uncertain source: ebullition from northern lakes. We defined four classes of CH4 bubble clusters trapped in lake ice representing distinct types of biogenic ebullition seeps that differed in flux rate. Mean annual ebullition determined through long-term (up to 700 d) continuous flux measurements of 31 seeps in three Siberian and one Alaskan lake was (mean ± standard error, 4-10 seeps per class; g CH4 seep –1 y –1): A, 6 ± 4; B, 48 ± 11; C, 354 ± 52; Hotspot, 1167 ± 177. Discrete-seep ebullition comprised up to 87% of total emissions from Siberian lakes when diffusive flux and background and seep ebullition were considered together. Including seep ebullition increased previous estimates of lake CH4 emissions based on traditional methods 5- to 8-fold for Siberian and Alaskan lakes. Linking new ebullition estimates to an established biogeochemical model, the Terrestrial Ecosystem Model, increased previous estimates of regional terrestrial CH4 emissions 3- to 7-fold in Siberia. Assessment of the method revealed that ebullition seeps are an important component of the terrestrial CH4 budget. They are identifiable by seep type by independent observers; they are consistent predictors of flux rate in both Siberia and Alaska; and they allow quantification of what was previously a large source of uncertainty in upscaling CH4 emissions from lakes to regions. |
format |
Text |
author |
Anthony, Katey W. Vas, Drago A. Brosius, Laura Chapin, F. Stuart, III Zimov, Sergey A. Zhuang, Qianlai |
spellingShingle |
Anthony, Katey W. Vas, Drago A. Brosius, Laura Chapin, F. Stuart, III Zimov, Sergey A. Zhuang, Qianlai Estimating methane emissions from northern lakes using ice-bubble surveys |
author_facet |
Anthony, Katey W. Vas, Drago A. Brosius, Laura Chapin, F. Stuart, III Zimov, Sergey A. Zhuang, Qianlai |
author_sort |
Anthony, Katey W. |
title |
Estimating methane emissions from northern lakes using ice-bubble surveys |
title_short |
Estimating methane emissions from northern lakes using ice-bubble surveys |
title_full |
Estimating methane emissions from northern lakes using ice-bubble surveys |
title_fullStr |
Estimating methane emissions from northern lakes using ice-bubble surveys |
title_full_unstemmed |
Estimating methane emissions from northern lakes using ice-bubble surveys |
title_sort |
estimating methane emissions from northern lakes using ice-bubble surveys |
publisher |
Purdue University |
publishDate |
2010 |
url |
https://docs.lib.purdue.edu/easpubs/22 https://doi.org/10.4319/lom.2010.8.592 http://www.wap.aslo.orgwww.wap.aslo.org/lomethods/free/2010/0592.pdf |
genre |
Alaska Siberia |
genre_facet |
Alaska Siberia |
op_source |
Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications |
op_relation |
https://docs.lib.purdue.edu/easpubs/22 doi:10.4319/lom.2010.8.592 http://www.wap.aslo.orgwww.wap.aslo.org/lomethods/free/2010/0592.pdf |
op_doi |
https://doi.org/10.4319/lom.2010.8.592 |
_version_ |
1770274250277519360 |