Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13563 |
Warming of subarctic tundra increases emissions of all three important greenhouse gases - carbon dioxide, methane, and nitrous oxide | |
Voigt, Carolina1; Lamprecht, Richard E. .1; Marushchak, Maija E.1; Lind, Saara E.1; Novakovskiy, Alexander2; Aurela, Mika3; Martikainen, Pertti J.1; Biasi, Christina1 | |
2017-08-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; Russia |
英文摘要 | Rapidly rising temperatures in the Arctic might cause a greater release of greenhouse gases (GHGs) to the atmosphere. To study the effect of warming on GHG dynamics, we deployed open-top chambers in a subarctic tundra site in Northeast European Russia. We determined carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes as well as the concentration of those gases, inorganic nitrogen (N) and dissolved organic carbon (DOC) along the soil profile. Studied tundra surfaces ranged from mineral to organic soils and from vegetated to unvegetated areas. As a result of air warming, the seasonal GHG budget of the vegetated tundra surfaces shifted from a GHG sink of -300 to -198 g CO2 -eq m(-2) to a source of 105 to 144 g CO2 -eq m(-2). At bare peat surfaces, we observed increased release of all three GHGs. While the positive warming response was dominated by CO2, we provide here the first in situ evidence of increasing N2O emissions from tundra soils with warming. Warming promoted N2O release not only from bare peat, previously identified as a strong N2O source, but also from the abundant, vegetated peat surfaces that do not emit N2O under present climate. At these surfaces, elevated temperatures had an adverse effect on plant growth, resulting in lower plant N uptake and, consequently, better N availability for soil microbes. Although the warming was limited to the soil surface and did not alter thaw depth, it increased concentrations of DOC, CO2, and CH4 in the soil down to the permafrost table. This can be attributed to downward DOC leaching, fueling microbial activity at depth. Taken together, our results emphasize the tight linkages between plant and soil processes, and different soil layers, which need to be taken into account when predicting the climate change feedback of the Arctic. |
英文关键词 | Arctic climate change DOC leaching nitrogen cycle OTC peat plateau permafrost temperature manipulation |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404863300015 |
WOS关键词 | CLIMATE-CHANGE ; PERMAFROST CARBON ; N2O EMISSIONS ; ORGANIC-MATTER ; PLANT-GROWTH ; PEAT SOILS ; CO2 FLUXES ; RESPIRATION ; ECOSYSTEM ; DYNAMICS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16810 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Eastern Finland, Dept Environm & Biol Sci, POB 1627, Kuopio 70211, Finland; 2.Komi SC UB RAS, Inst Biol, Syktyvkar 167982, Russia; 3.Finnish Meteorol Inst, POB 503, FIN-00101 Helsinki, Finland |
推荐引用方式 GB/T 7714 | Voigt, Carolina,Lamprecht, Richard E. .,Marushchak, Maija E.,et al. Warming of subarctic tundra increases emissions of all three important greenhouse gases - carbon dioxide, methane, and nitrous oxide[J]. GLOBAL CHANGE BIOLOGY,2017,23(8). |
APA | Voigt, Carolina.,Lamprecht, Richard E. ..,Marushchak, Maija E..,Lind, Saara E..,Novakovskiy, Alexander.,...&Biasi, Christina.(2017).Warming of subarctic tundra increases emissions of all three important greenhouse gases - carbon dioxide, methane, and nitrous oxide.GLOBAL CHANGE BIOLOGY,23(8). |
MLA | Voigt, Carolina,et al."Warming of subarctic tundra increases emissions of all three important greenhouse gases - carbon dioxide, methane, and nitrous oxide".GLOBAL CHANGE BIOLOGY 23.8(2017). |
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