Details
| Original language | English |
|---|---|
| Title of host publication | 18th International Multidisciplinary Scientific GeoConference (SGEM 2018) |
| Pages | 213-218 |
| Number of pages | 6 |
| Edition | 3.2 |
| Publication status | Published - 2018 |
| Event | 18th International Multidisciplinary Scientific Geoconference, SGEM 2018 - Albena, Bulgaria Duration: 2 Jul 2018 → 8 Jul 2018 |
Publication series
| Name | International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM |
|---|---|
| Number | 3.2 |
| Volume | 18 |
| ISSN (Print) | 1314-2704 |
Abstract
A fundamental research question related to the impact of thawing permafrost on global change is, how fast organic matter in the thawing permafrost can be converted to CO2 and CH4 and released into the atmosphere. Current estimates on the degradability of thawing organic matter in permafrost are based on incubation studies which are highly artificial and probably overestimate the greenhouse gas production under in situ conditions. We aimed at identifying the microbial response and associated release of CO2 and CH4 from thawing soil that has previously been permanently frozen. For this, we performed an in situ field-based incubation experiment in a rim of an ice-wedge polygon on Samoylov island in the Lena River Delta, Russia, at 72°22’N, 126°28’E. We moved formerly frozen soil to the active layer. This material was either placed partly in the subsoil, to mimic the cryoturbation processes, or was exposed to the soil surface to simulate an eroded river bank. Data from the incubation experiment showed low intensity of gas emission which indicates a weak involvement of the buried soil in the present-day processes of microbial decomposition.
Keywords
- Buried soil, CH, CO, Field-based incubation experiment, Permafrost-affected ecosystems
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Earth and Planetary Sciences(all)
- Geology
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18th International Multidisciplinary Scientific GeoConference (SGEM 2018). 3.2. ed. 2018. p. 213-218 (International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM; Vol. 18, No. 3.2).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Greenhouse gas release from buried soil in the lena river delta, siberia
T2 - 18th International Multidisciplinary Scientific Geoconference, SGEM 2018
AU - Evgrafova, Svetlana
AU - Novikov, Oleg
AU - Meteleva, Maria
AU - Guggenberger, Georg
N1 - Funding information: This work was supported by the Russian Government Megagrant (project no. 14.?25.31.0031), by the Russian Foundation for Basic Research (projects no. 16-04-01677-a and 18-05-60291 Arctica), and by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research (project no. 17-45-240884).
PY - 2018
Y1 - 2018
N2 - A fundamental research question related to the impact of thawing permafrost on global change is, how fast organic matter in the thawing permafrost can be converted to CO2 and CH4 and released into the atmosphere. Current estimates on the degradability of thawing organic matter in permafrost are based on incubation studies which are highly artificial and probably overestimate the greenhouse gas production under in situ conditions. We aimed at identifying the microbial response and associated release of CO2 and CH4 from thawing soil that has previously been permanently frozen. For this, we performed an in situ field-based incubation experiment in a rim of an ice-wedge polygon on Samoylov island in the Lena River Delta, Russia, at 72°22’N, 126°28’E. We moved formerly frozen soil to the active layer. This material was either placed partly in the subsoil, to mimic the cryoturbation processes, or was exposed to the soil surface to simulate an eroded river bank. Data from the incubation experiment showed low intensity of gas emission which indicates a weak involvement of the buried soil in the present-day processes of microbial decomposition.
AB - A fundamental research question related to the impact of thawing permafrost on global change is, how fast organic matter in the thawing permafrost can be converted to CO2 and CH4 and released into the atmosphere. Current estimates on the degradability of thawing organic matter in permafrost are based on incubation studies which are highly artificial and probably overestimate the greenhouse gas production under in situ conditions. We aimed at identifying the microbial response and associated release of CO2 and CH4 from thawing soil that has previously been permanently frozen. For this, we performed an in situ field-based incubation experiment in a rim of an ice-wedge polygon on Samoylov island in the Lena River Delta, Russia, at 72°22’N, 126°28’E. We moved formerly frozen soil to the active layer. This material was either placed partly in the subsoil, to mimic the cryoturbation processes, or was exposed to the soil surface to simulate an eroded river bank. Data from the incubation experiment showed low intensity of gas emission which indicates a weak involvement of the buried soil in the present-day processes of microbial decomposition.
KW - Buried soil
KW - CH
KW - CO
KW - Field-based incubation experiment
KW - Permafrost-affected ecosystems
UR - http://www.scopus.com/inward/record.url?scp=85058888381&partnerID=8YFLogxK
U2 - 10.5593/sgem2018/3.2/S13.028
DO - 10.5593/sgem2018/3.2/S13.028
M3 - Conference contribution
AN - SCOPUS:85058888381
SN - 978-1-5108-7357-5
T3 - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SP - 213
EP - 218
BT - 18th International Multidisciplinary Scientific GeoConference (SGEM 2018)
Y2 - 2 July 2018 through 8 July 2018
ER -