N2O
An alas is a round area of grassland with a pond at the center, formed by subsidence associated with permafrost thawing in taiga forests in eastern Siberia. To characterize the relationship between the N2O dynamics and soil properties of forest–alas ecosystems, we investigated soil N2O fluxes in fou...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.485.6236 2023-05-15T17:57:56+02:00 N2O Morishita Tomoaki Hatano Ryusuke Desyatkin Roman V The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.6236 http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.6236 http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf Key words alas eastern Siberia larch forest N2O flux Yakutsk text ftciteseerx 2016-01-08T08:10:07Z An alas is a round area of grassland with a pond at the center, formed by subsidence associated with permafrost thawing in taiga forests in eastern Siberia. To characterize the relationship between the N2O dynamics and soil properties of forest–alas ecosystems, we investigated soil N2O fluxes in four thermokarst ecosystems composed of forest, grassland, and ponds near Yakutsk in July 2000. At all sites, pH, EC, and organic carbon (OC) content in soil were higher in the grasslands (pH 7.3–9.3, EC 22–63 mS m–1, OC 1.4%–15.3%) than in the forests (5.6–6.3, 1.4–6.8 mS m–1, 0.4%–1.7%), and C/N was lower in the grasslands (10–18) than in the forests (18–24). Both emission (positive values) and uptake (negative values) of N2O occurred in the forests (–2.1 to 1.0 µg N m–2 h–1) and grasslands (–1.3 to 31 µg N m–2 h–1). N2O emissions at the edge of ponds varied widely (0 to 140 µg N m–2 h–1). N2O was taken up in the ponds (–2.2 to 0.0 µg N m–2 h–1). There were significant differences in N2O fluxes among land cover types. N2O flux was positively correlated with soil moisture, but N2O fluxes were smallest in the ponds because of the biological denitrification there. Therefore, an increase in soil moisture increased N2O flux. Text permafrost taiga Thermokarst Yakutsk Siberia Unknown Yakutsk |
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Open Polar |
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English |
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Key words alas eastern Siberia larch forest N2O flux Yakutsk |
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Key words alas eastern Siberia larch forest N2O flux Yakutsk Morishita Tomoaki Hatano Ryusuke Desyatkin Roman V N2O |
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Key words alas eastern Siberia larch forest N2O flux Yakutsk |
description |
An alas is a round area of grassland with a pond at the center, formed by subsidence associated with permafrost thawing in taiga forests in eastern Siberia. To characterize the relationship between the N2O dynamics and soil properties of forest–alas ecosystems, we investigated soil N2O fluxes in four thermokarst ecosystems composed of forest, grassland, and ponds near Yakutsk in July 2000. At all sites, pH, EC, and organic carbon (OC) content in soil were higher in the grasslands (pH 7.3–9.3, EC 22–63 mS m–1, OC 1.4%–15.3%) than in the forests (5.6–6.3, 1.4–6.8 mS m–1, 0.4%–1.7%), and C/N was lower in the grasslands (10–18) than in the forests (18–24). Both emission (positive values) and uptake (negative values) of N2O occurred in the forests (–2.1 to 1.0 µg N m–2 h–1) and grasslands (–1.3 to 31 µg N m–2 h–1). N2O emissions at the edge of ponds varied widely (0 to 140 µg N m–2 h–1). N2O was taken up in the ponds (–2.2 to 0.0 µg N m–2 h–1). There were significant differences in N2O fluxes among land cover types. N2O flux was positively correlated with soil moisture, but N2O fluxes were smallest in the ponds because of the biological denitrification there. Therefore, an increase in soil moisture increased N2O flux. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Morishita Tomoaki Hatano Ryusuke Desyatkin Roman V |
author_facet |
Morishita Tomoaki Hatano Ryusuke Desyatkin Roman V |
author_sort |
Morishita Tomoaki |
title |
N2O |
title_short |
N2O |
title_full |
N2O |
title_fullStr |
N2O |
title_full_unstemmed |
N2O |
title_sort |
n2o |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.6236 http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf |
geographic |
Yakutsk |
geographic_facet |
Yakutsk |
genre |
permafrost taiga Thermokarst Yakutsk Siberia |
genre_facet |
permafrost taiga Thermokarst Yakutsk Siberia |
op_source |
http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.6236 http://www.agr.hokudai.ac.jp/env/ctc_siberia/bibliography/sympo2006/PDF/080-Morishita.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766166444178931712 |