Comparison of carbon and water vapor exchange of forest and grassland in permafrost regions, Central Yakutia, Russia
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| Title: | Comparison of carbon and water vapor exchange of forest and grassland in permafrost regions, Central Yakutia, Russia |
|---|---|
| Authors: | Lopez C., M.L.1 larry@iwate-u.ac.jp, Gerasimov, E.2, Machimura, T.3, Takakai, F.4, Iwahana, G.5, Fedorov, A.N.2, Fukuda, M.6 |
| Source: | Agricultural & Forest Meteorology. Dec2008, Vol. 148 Issue 12, p1968-1977. 10p. |
| Subject Terms: | *Forest ecology, *Forests & forestry, *Grasslands, *Climate change, *Evapotranspiration, *Global warming, Water vapor transport, Larches |
| Geographic Terms: | Russia |
| Abstract: | Abstract: Boreal grasslands have been largely neglected in carbon and water vapor flux models despite being originated by past global climate changes. Therefore in this study, meteorological conditions, water vapor and CO2 fluxes were measured by the eddy correlation technique simultaneously in a larch forest and alas ecosystem (grassland thermokarst depression) in Central Yakutia, eastern Siberia, during the growing season of 2006 (approximately 100 days, May 23rd–August 31st). The alas ecosystem was a carbon sink (−1.38tCha−1) but had a 60% lower carbon sequestration capacity than the surrounding larch forest (−3.44tCha−1) during the study period. Despite this large difference in carbon exchange, water loss from the alas ecosystem (118mm) was only 13% lower than that from the forest ecosystem (136mm). Water vapor flux measured in the alas was higher under similar environmental conditions when the source was the lake water than when the source was the grassland. This supports the theory that lake evaporation contributes significantly to the evaporation from the alas as indicated also by the lake water level constant decrease during the growing season. Mid-summer forest and alas mean evapotranspiration was 1.4 and 1.2mmd−1 respectively. Mean daily canopy conductance was higher in the forest than in the alas (3.8 and 2.4mms−1, respectively) as expected due to differences in canopy architecture at each site. In this study a rough estimate of the NEE of grassland in Central Yakutia shows an underestimation of 0.9×10−3 Pg if this area is considered as forested, as most regional models do. Our results suggest that a more detail analysis of distinctive areas within the territory of eastern Siberia is needed in order to obtain a better understanding of carbon and water fluxes from this immense boreal region. Furthermore, if the present global warming evokes landscape change from forest to grassland, the carbon sink capacity of this boreal region could be significantly reduced. [Copyright &y& Elsevier] |
| Copyright of Agricultural & Forest Meteorology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 35557091 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Comparison of carbon and water vapor exchange of forest and grassland in permafrost regions, Central Yakutia, Russia – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lopez+C%2E%2C+M%2EL%2E%22">Lopez C., M.L.</searchLink><relatesTo>1</relatesTo><i> larry@iwate-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Gerasimov%2C+E%2E%22">Gerasimov, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Machimura%2C+T%2E%22">Machimura, T.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Takakai%2C+F%2E%22">Takakai, F.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Iwahana%2C+G%2E%22">Iwahana, G.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Fedorov%2C+A%2EN%2E%22">Fedorov, A.N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Fukuda%2C+M%2E%22">Fukuda, M.</searchLink><relatesTo>6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: Agricultural & Forest Meteorology. Dec2008, Vol. 148 Issue 12, p1968-1977. 10p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Forest+ecology%22">Forest ecology</searchLink><br />*<searchLink fieldCode="DE" term="%22Forests+%26+forestry%22">Forests & forestry</searchLink><br />*<searchLink fieldCode="DE" term="%22Grasslands%22">Grasslands</searchLink><br />*<searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br />*<searchLink fieldCode="DE" term="%22Evapotranspiration%22">Evapotranspiration</searchLink><br />*<searchLink fieldCode="DE" term="%22Global+warming%22">Global warming</searchLink><br /><searchLink fieldCode="DE" term="%22Water+vapor+transport%22">Water vapor transport</searchLink><br /><searchLink fieldCode="DE" term="%22Larches%22">Larches</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Russia%22">Russia</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: Boreal grasslands have been largely neglected in carbon and water vapor flux models despite being originated by past global climate changes. Therefore in this study, meteorological conditions, water vapor and CO2 fluxes were measured by the eddy correlation technique simultaneously in a larch forest and alas ecosystem (grassland thermokarst depression) in Central Yakutia, eastern Siberia, during the growing season of 2006 (approximately 100 days, May 23rd–August 31st). The alas ecosystem was a carbon sink (−1.38tCha−1) but had a 60% lower carbon sequestration capacity than the surrounding larch forest (−3.44tCha−1) during the study period. Despite this large difference in carbon exchange, water loss from the alas ecosystem (118mm) was only 13% lower than that from the forest ecosystem (136mm). Water vapor flux measured in the alas was higher under similar environmental conditions when the source was the lake water than when the source was the grassland. This supports the theory that lake evaporation contributes significantly to the evaporation from the alas as indicated also by the lake water level constant decrease during the growing season. Mid-summer forest and alas mean evapotranspiration was 1.4 and 1.2mmd−1 respectively. Mean daily canopy conductance was higher in the forest than in the alas (3.8 and 2.4mms−1, respectively) as expected due to differences in canopy architecture at each site. In this study a rough estimate of the NEE of grassland in Central Yakutia shows an underestimation of 0.9×10−3 Pg if this area is considered as forested, as most regional models do. Our results suggest that a more detail analysis of distinctive areas within the territory of eastern Siberia is needed in order to obtain a better understanding of carbon and water fluxes from this immense boreal region. Furthermore, if the present global warming evokes landscape change from forest to grassland, the carbon sink capacity of this boreal region could be significantly reduced. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Agricultural & Forest Meteorology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.agrformet.2008.09.013 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1968 Subjects: – SubjectFull: Forest ecology Type: general – SubjectFull: Forests & forestry Type: general – SubjectFull: Grasslands Type: general – SubjectFull: Climate change Type: general – SubjectFull: Evapotranspiration Type: general – SubjectFull: Global warming Type: general – SubjectFull: Water vapor transport Type: general – SubjectFull: Larches Type: general – SubjectFull: Russia Type: general Titles: – TitleFull: Comparison of carbon and water vapor exchange of forest and grassland in permafrost regions, Central Yakutia, Russia Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lopez C., M.L. – PersonEntity: Name: NameFull: Gerasimov, E. – PersonEntity: Name: NameFull: Machimura, T. – PersonEntity: Name: NameFull: Takakai, F. – PersonEntity: Name: NameFull: Iwahana, G. – PersonEntity: Name: NameFull: Fedorov, A.N. – PersonEntity: Name: NameFull: Fukuda, M. IsPartOfRelationships: – BibEntity: Dates: – D: 08 M: 12 Text: Dec2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 01681923 Numbering: – Type: volume Value: 148 – Type: issue Value: 12 Titles: – TitleFull: Agricultural & Forest Meteorology Type: main |
| ResultId | 1 |
