Fluxes of methane, carbon dioxide and nitrous oxide in boreal lakes and potential anthropogenic effects on the aquatic greenhouse gas emissions

Huttunen, Jari T.; Alm, Jukka; Liikanen, Anu; Juutinen, Sari; Larmola, Tuula; Hammar, Taina; Silvola, Jouko; Martikainen, Pertti J.

doi:10.1016/s0045-6535(03)00243-1

Cited by 346 publications

(288 citation statements)

References 34 publications

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“…Lower N 2 O flux, linked to lower N 2 O concentrations in surface waters observed in spring, might be linked to higher bacterial activity and therefore more efficient denitrification, leading to a stronger N 2 O consumption. Compared with fluxes reported by Huttunen et al (2003) for five boreal lakes, N 2 O fluxes measured in the Dendre stone pit lake were very high, and no negative flux was observed, suggesting that the water column was a source of N 2 O for the atmosphere all the year. These higher N 2 O emissions can also be related to high DIN concentrations.…”

Section: Discussioncontrasting

confidence: 60%

Emission and oxidation of methane in a meromictic, eutrophic and temperate lake (Dendre, Belgium)

et al. 2017

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h i g h l i g h t sThe studied lake was meromictic and characterized by high methane, nutrients and sulfate concentrations in the water column. High aerobic and anaerobic methane oxidation rates were observed in the water column, and were dependent on the season. Anaerobic methane oxidation was linked to sulfate reduction, and potentially to nitrate reduction. Despite high methane oxidation rates, methane fluxes to the atmosphere were high. a r t i c l e i n f o a b s t r a c tWe sampled the water column of the Dendre stone pit lake (Belgium) in spring, summer, autumn and winter. Depth profiles of several physico-chemical variables, nutrients, dissolved gases (CO 2 , CH 4 , N 2 O), sulfate, sulfide, iron and manganese concentrations and d 13 C-CH4 were determined. We performed incubation experiments to quantify CH 4 oxidation rates, with a focus on anaerobic CH 4 oxidation (AOM), without and with an inhibitor of sulfate reduction (molybdate). The evolution of nitrate and sulfate concentrations during the incubations was monitored. The water column was anoxic below 20 m throughout the year, and was thermally stratified in summer and autumn. High partial pressure of CO 2 and CH 4 and high concentrations of ammonium and phosphate were observed in anoxic waters. Important nitrous oxide and nitrate concentration maxima were also observed (up to 440 nmol L À1 and 80 mmol L À1 , respectively). Vertical profiles of d 13 C-CH 4 unambiguously showed the occurrence of AOM. Important AOM rates (up to 14 mmol L À1 d À1 ) were observed and often co-occurred with nitrate consumption peaks, suggesting the occurrence of AOM coupled with nitrate reduction. AOM coupled with sulfate reduction also occurred, since AOM rates tended to be lower when molybdate was added. CH 4 oxidation was mostly aerobic (~80% of total oxidation) in spring and winter, and almost exclusively anaerobic in summer and autumn. Despite important CH 4 oxidation rates, the estimated CH 4 fluxes from the water surface to the atmosphere were high (mean of 732 mmol m À2 d À1 in spring, summer and autumn, and up to 12,482 mmol m À2 d À1 in winter).

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Section: Discussioncontrasting

confidence: 60%

Emission and oxidation of methane in a meromictic, eutrophic and temperate lake (Dendre, Belgium)

et al. 2017

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“…9) suggest that surface CH 4 concentrations were also similar. The mean daily rate of CH 4 diffusion to the atmosphere during both open-water periods (1.2 mmol m −2 d −1 ) was within the range of observations for other boreal lakes (Phelps et al, 1998;Huttunen et al, 2003;Walter et al, 2006). We assumed that CH 4 not emitted to the atmosphere during this period was consumed by methanotrophy.…”

Section: Water Column Dissolved Gasessupporting

confidence: 65%

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

et al. 2014

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Abstract. Microbial methane (CH 4 ) ebullition (bubbling) from anoxic lake sediments comprises a globally significant flux to the atmosphere, but ebullition bubbles in temperate and polar lakes can be trapped by winter ice cover and later released during spring thaw. This "ice-bubble storage" (IBS) constitutes a novel mode of CH 4 emission. Before bubbles are encapsulated by downward-growing ice, some of their CH 4 dissolves into the lake water, where it may be subject to oxidation. We present field characterization and a model of the annual CH 4 cycle in Goldstream Lake, a thermokarst (thaw) lake in interior Alaska. We find that summertime ebullition dominates annual CH 4 emissions to the atmosphere. Eighty percent of CH 4 in bubbles trapped by ice dissolves into the lake water column in winter, and about half of that is oxidized. The ice growth rate and the magnitude of the CH 4 ebullition flux are important controlling factors of bubble dissolution. Seven percent of annual ebullition CH 4 is trapped as IBS and later emitted as ice melts. In a future warmer climate, there will likely be less seasonal ice cover, less IBS, less CH 4 dissolution from trapped bubbles, and greater CH 4 emissions from northern lakes.

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“…Spatial and temporal variation of N 2 O fluxes in the littoral zone Studies in recent years suggest a trend of higher littoral N 2 O emissions from the eutrophic lake than from the oligotrophic one (Huttunen et al 2003a(Huttunen et al , 2003b. An extraordinarily high level of N 2 O emissions (0.430 mg N 2 O m −2 h −1 ) was found in the littoral zone of Meiliang Bay, Lake Taihu, the third largest lake in China, probably due to serious eutrophication (Wang et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Nitrous oxide fluxes from the littoral zone of a lake on the Qinghai-Tibetan Plateau

Chen

Wang

et al. 2011

Environ Monit Assess

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Fluxes of methane, carbon dioxide and nitrous oxide in boreal lakes and potential anthropogenic effects on the aquatic greenhouse gas emissions

Cited by 346 publications

References 34 publications

Emission and oxidation of methane in a meromictic, eutrophic and temperate lake (Dendre, Belgium)

Emission and oxidation of methane in a meromictic, eutrophic and temperate lake (Dendre, Belgium)

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

Nitrous oxide fluxes from the littoral zone of a lake on the Qinghai-Tibetan Plateau

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