An Atlantic blanket bog is a modest CO<sub>2</sub> sink

Sottocornola, Matteo; Kiely, Gerard

doi:10.1029/2005gl024731

Cited by 42 publications

(41 citation statements)

References 23 publications

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“…al., 2004;Drösler et al, 2008). Most studies have focused on the greenhouse gas exchange of natural and agriculturally used peatlands (e.g., Alm et al, 1999a;Aurela et al, 2009;Aurela et al, 2007;Bubier et al, 2003b;Hendriks et al, 2007;Lafleur et al, 2003;Sottocornola and Kiely, 2005). However, studies about peatland forests are still rare; e.g., Maljanen et al (2010) emphasize the lack of knowledge about the carbon budget of peatland forests, even in the boreal climate zone.…”

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

“…The organic soil carbon of the drained peat is oxidized to CO 2 and emitted to the atmosphere. To date, a number of studies have investigated the CO 2 exchange of peatlands and the environmental factors that control it by eddy covariance (e.g., Aurela et al, 2009;Lafleur et al, 2005;Sottocornola and Kiely, 2005), or chamber measurements (e.g., Bubier et al, 2003a;Goulden and Crill, 1997). The resulting carbon budgets depend on land use and peatland type.…”

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

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Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

et al. 2014

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Abstract. This study compares the CO 2 exchange of a natural bog forest, and of a bog drained for forestry in the pre-Alpine region of southern Germany. The sites are separated by only 10 km, they share the same soil formation history and are exposed to the same climate and weather conditions. In contrast, they differ in land use history: at the Schechenfilz site a natural bog-pine forest (Pinus mugo ssp. rotundata) grows on an undisturbed, about 5 m thick peat layer; at Mooseurach a planted spruce forest (Picea abies) grows on drained and degraded peat (3.4 m). The net ecosystem exchange of CO 2 (NEE) at both sites has been investigated for 2 years (July 2010-June 2012), using the eddy covariance technique. Our results indicate that the drained, forested bog at Mooseurach is a much stronger carbon dioxide sink (−130 ± 31 and −300 ± 66 g C m −2 a −1 in the first and second year, respectively) than the natural bog forest at Schechenfilz (−53 ± 28 and −73 ± 38 g C m −2 a −1 ). The strong net CO 2 uptake can be explained by the high gross primary productivity of the 44-year old spruces that overcompensates the two-times stronger ecosystem respiration at the drained site. The larger productivity of the spruces can be clearly attributed to the larger plant area index (PAI) of the spruce site. However, even though current flux measurements indicate strong CO 2 uptake of the drained spruce forest, the site is a strong net CO 2 source when the whole lifecycle since forest planting is considered. It is important to access this result in terms of the long-term biome balance. To do so, we used historical data to estimate the difference between carbon fixation by the spruces and the carbon loss from the peat due to drainage since forest planting. This rough estimate indicates a strong carbon release of +134 t C ha −1 within the last 44 years. Thus, the spruces would need to grow for another 100 years at about the current rate, to compensate the potential peat loss of the former years. In contrast, the natural bog-pine ecosystem has likely been a small but stable carbon sink for decades, which our results suggest is very robust regarding short-term changes of environmental factors.

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Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

et al. 2014

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“…For these reasons, we assumed that the self-heating effect was of minimal importance in our case. In previous studies (e.g., Sottocornola and Kiely, 2005;Mauder et al, 2013), the lack of surface energy balance was considered as an indicator for estimating the systematic errors in EC fluxes. Considering that this parameter was not available at our site, we accessed the reports in the literature on energy balance deficits at agricultural sites (Foken et al, 2010;Lei and Yang, 2010) and made a rough estimate of −30 ∼ −20 % (mean: −25 %) for the systematic uncertainty in the NEE fluxes at our site.…”

Section: Uncertainties In Eddy Covariance Neementioning

confidence: 99%

“…The systematic uncertainties were estimated with the magnitudes of the energy balance deficits (e.g., Sottocornola and Kiely, 2005;Mauder et al, 2013).…”

Section: Uncertainty and Statistical Analysismentioning

confidence: 99%

Comparison between eddy covariance and automatic chamber techniques for measuring net ecosystem exchange of carbon dioxide in cotton and wheat fields

et al. 2013

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Abstract. Static and transparent automatic chamber (AC)technique is a necessary choice for measuring net ecosystem exchange (NEE) of carbon dioxide (CO 2 ) in circumstances where eddy covariance (EC) technique is not applicable. However, a comparison of the two techniques for measurements on croplands has seldom been undertaken. We carried out NEE observations in a cotton field (for one year) and a winter wheat field (for one cropping season) using both AC and EC techniques, to (a) compare the NEE fluxes measured using each technique, and (b) test the NEE measurement performance of an automatic chamber system (AMEG), which was designed for simultaneous flux measurements of multiple gases. The half-hourly NEE fluxes measured with the two techniques were in approximate agreement, with the AC fluxes being 0.78 (cotton) and 1.06 (wheat) times the size of the EC fluxes. When integrated to daily timescale, the fluxes of the two techniques were in better agreement, showing an average ratio of 0.94 and 1.00 for the cotton and wheat, respectively. During the periods with comparable field conditions and normal performance of both instruments, the cumulative NEE fluxes revealed small differences between the two techniques (−9.0 % ∼ 7 %, with a mean of 0.1 %). The measurements resulted in an annual cumulative NEE of −40 g C m −2 yr −1 (EC) and −42 g C m −2 yr −1 (AC) in the cotton field, and a seasonal cumulative NEE of −251 g C m −2 (EC) and −205 g C m −2 (AC) in the wheat field. Our results indicate that, for cropland populated by short plants, the AMEG system and the data processing procedures applied in this study are able to provide NEE estimates comparable to those from EC measurements.

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“…Worldwide, peatlands have a pivotal role in moderating the extent of climate change. Although sequestration varies from year to year depending on temperature, rainfall and the level of the water table (Alm et al, 1999), the situation for pristine bogs is one of net removal of carbon from the atmosphere (Sottocornola and Kiely, 2005). Unfortunately, as discussed earlier, much active raised bog has been lost in Ireland, equivalent to an estimated 36% between (Fernandez-Valverde et al, 2006.…”

Section: 1` Ecosystem Servicesmentioning

confidence: 99%

Peatlands, their economic value and priorities for their future management – The example of Ireland

2012

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An Atlantic blanket bog is a modest CO₂ sink

Cited by 42 publications

References 23 publications

Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

Comparison between eddy covariance and automatic chamber techniques for measuring net ecosystem exchange of carbon dioxide in cotton and wheat fields

Peatlands, their economic value and priorities for their future management – The example of Ireland

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An Atlantic blanket bog is a modest CO2 sink

Cited by 42 publications

References 23 publications

Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

Comparison between eddy covariance and automatic chamber techniques for measuring net ecosystem exchange of carbon dioxide in cotton and wheat fields

Peatlands, their economic value and priorities for their future management – The example of Ireland

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An Atlantic blanket bog is a modest CO₂ sink