globalchange  > 气候变化事实与影响
DOI: 10.1016/j.polar.2019.01.003
WOS记录号: WOS:000460543300014
论文题名:
Technical advances in measuring greenhouse gas emissions from thawing permafrost soils in the laboratory
作者: Yonemura, Seiichiro1; Uchida, Masao2; Iwahana, Go3; Kim, Yongwon3; Yoshikawa, Kenji4
通讯作者: Yonemura, Seiichiro
刊名: POLAR SCIENCE
ISSN: 1873-9652
EISSN: 1876-4428
出版年: 2019
卷: 19, 页码:137-145
语种: 英语
英文关键词: Alaska ; Greenhouse gas ; Incubation ; Permafrost ; Temperature dependence ; Tundra
WOS关键词: ORGANIC-MATTER ; CARBON RELEASE ; DALTON HIGHWAY ; CO2 EFFLUX ; TEMPERATURE ; TUNDRA ; DECOMPOSITION ; DEPTH ; MINERALIZATION ; FROZEN
WOS学科分类: Ecology ; Geosciences, Multidisciplinary
WOS研究方向: Environmental Sciences & Ecology ; Geology
英文摘要:

Understanding permafrost soils' response to global warming is critical for understanding changing global ecosystems. In the present study, we developed a dynamic system for measuring gas emissions from permafrost soils at different soil temperatures and checked the validity of this methodology using 10 permafrost and active layer soil core samples collected under frozen conditions from northern Alaska in winter. We observed that more time (several hours to half a day) was required to control the temperature of permafrost soils than normal soils, particularly during freeze-thaw cycles. Gas emissions were quite variable between samples. However, CO2 emissions were positively related to temperature in all samples, as were CO emissions, particularly for the permafrost samples. CH4 emissions were not detected in any sample, possibly because of atmospheric air as the carrier gas, and H-2 was detected in only two samples. Conversely, NO emissions were detected in nearly all samples and were highly correlated with soil nitrogen content, while N2O emissions were detected in only one sample with very low NO emissions. Our findings demonstrate that this novel system could be a powerful tool for understanding gas emission dynamics in permafrost soils.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/130799
Appears in Collections:气候变化事实与影响

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作者单位: 1.NARO, Inst Agroenvironm Sci NIAES, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan
2.NIES, 16-2 Onogawa, Tsukuba, Ibaraki 3050053, Japan
3.UAF, IARC, 2160 N Koyukuk Dr, Fairbanks, AK 99775 USA
4.UAF, WERC, POB 755860, Fairbanks, AK 99775 USA

Recommended Citation:
Yonemura, Seiichiro,Uchida, Masao,Iwahana, Go,et al. Technical advances in measuring greenhouse gas emissions from thawing permafrost soils in the laboratory[J]. POLAR SCIENCE,2019-01-01,19:137-145
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