Academic Journal
Synthesizing greenhouse gas fluxes across nine European peatlands and shrublands – responses to climatic and environmental changes
| العنوان: | Synthesizing greenhouse gas fluxes across nine European peatlands and shrublands – responses to climatic and environmental changes |
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| المؤلفون: | Carter, Mette Sustmann, Larsen, Klaus Steenberg, Emmett, B., Estiarte, M., Field, C., Leith, I. D., Lund, M., Meijide, A., Mills, R. T. E., Niinemets, Ü., Peñuelas, J., Portillo-Estrada, M., Schmidt, I. K., Selsted, Merete Bang, Sheppard, L. J., Sowerby, A., Tietema, A., Beier, Claus |
| المصدر: | Carter , M S , Larsen , K S , Emmett , B , Estiarte , M , Field , C , Leith , I D , Lund , M , Meijide , A , Mills , R T E , Niinemets , Ü , Peñuelas , J , Portillo-Estrada , M , Schmidt , I K , Selsted , M B , Sheppard , L J , Sowerby , A , Tietema , A & Beier , C 2012 , ' Synthesizing greenhouse gas fluxes across nine European peatlands and shrublands – responses to climatic and environmental changes .... |
| سنة النشر: | 2012 |
| المجموعة: | Technical University of Denmark: DTU Orbit / Danmarks Tekniske Universitet |
| مصطلحات موضوعية: | Earth and Environmental Sciences, Biology and Life Sciences, /dk/atira/pure/sustainabledevelopmentgoals/climate_action, name=SDG 13 - Climate Action |
| الوصف: | In this study, we compare annual fluxes of methane (CH 4 ), nitrous oxide (N 2 O) and soil respiratory carbon dioxide (CO 2 ) measured at nine European peatlands ( n = 4) and shrublands ( n = 5). The sites range from northern Sweden to Spain, covering a span in mean annual air temperature from 0 to 16 °C, and in annual precipitation from 300 to 1300 mm yr −1 . The effects of climate change, including temperature increase and prolonged drought, were tested at five shrubland sites. At one peatland site, the long-term (>30 yr) effect of drainage was assessed, while increased nitrogen deposition was investigated at three peatland sites. The shrublands were generally sinks for atmospheric CH 4 whereas the peatlands were CH 4 sources, with fluxes ranging from −519 to +6890 mg CH 4 -C m −2 yr −1 across the studied ecosystems. At the peatland sites, annual CH 4 emission increased with mean annual air temperature, while a negative relationship was found between net CH 4 uptake and the soil carbon stock at the shrubland sites. Annual N 2 O fluxes were generally small ranging from –14 to 42 mg N 2 O-N m −2 yr −1 . Highest N 2 O emission occurred at the sites that had highest concentration of nitrate (NO 3 − ) in soil water. Furthermore, experimentally increased NO 3 − deposition led to increased N 2 O efflux, whereas prolonged drought and long-term drainage reduced the N 2 O efflux. Soil CO 2 emissions in control plots ranged from 310 to 732 g CO 2 -C m −2 yr −1 . Drought and long-term drainage generally reduced the soil CO 2 efflux, except at a~hydric shrubland where drought tended to increase soil respiration. When comparing the fractional importance of each greenhouse gas to the total numerical global warming response, the change in CO 2 efflux dominated the response in all treatments (ranging 71–96%), except for NO 3 − addition where 89% was due to change in CH 4 emissions. Thus, in European peatlands and shrublands the feedback to global warming induced by the investigated anthropogenic disturbances will be ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://orbit.dtu.dk/en/publications/0d05550a-1ab3-465a-9e42-229069d6a8ec |
| DOI: | 10.5194/bgd-9-3693-2012 |
| الاتاحة: | https://orbit.dtu.dk/en/publications/0d05550a-1ab3-465a-9e42-229069d6a8ec https://doi.org/10.5194/bgd-9-3693-2012 https://backend.orbit.dtu.dk/ws/files/10264479/Synthesizing_greenhouse.pdf |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.2BD5A9B4 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/bgd-9-3693-2012 |
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