Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ S. Evgrafova [et al.] // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS CONFERENCE : STEF92 TECHNOLOGY LTD, 2016. - 16th International Multidisciplinary Scientific Geoconference (SGEM (JUN 30-JUL 06, 2016, Albena, BULGARIA). - P199-204. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:15 . - РУБ Ecology + Oceanography + Soil Science + Water Resources

Аннотация: We investigated isotopic signature of methane efflux from soil surface of Siberian arctic and sub-arctic ecosystems in sites in Siberia. In the boreal ecosystem of the Tura site (64 degrees 15'N, 100 13'E) the delta C-13 signature of methane (-43%o for south facing slope and -35%o from north facing slope) showed low methane production potential of investigated soils. Two years of monitoring of the delta C-13(CH4) signatures from surface of ice-wedge polygon of Samoylov island (72 degrees 22'N, 126 degrees 28'E) showed that the delta C-13 signature were different regarding to temperature and precipitation. The mean of delta C-13(CH4) emitted from the polygon wall ranged from 72.5 +/- 1.9%. to-47.3 +/- 1.5%. The same for polygon center ranged from-67.1 +/- 2.0% to-62.4 +/- 1.7%. Almost no difference between delta C-13(CH4) signature of years observed could mean that conditions for methane production are possibly quite stable. With respect to methane emission both permafrost ecosystems are thus very contrasting.

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Держатели документа:
RAS, VN Sukachev Inst Forest, SB, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany.

Доп.точки доступа:
Evgrafova, Svetlana; Novikov, Oleg; Alexandrov, Dmitry; Guggenberger, Georg

/ Y. V. Barkhatov [et al.] // Dokl. Earth Sci. - 2018. - Vol. 483, Is. 2. - P1539-1541, DOI 10.1134/S1028334X18120115. - Cited References:15. - This study was supported by the Russian Foundation for Basic Research, the Krasnoyarsk Krai Government and the Krasnoyarsk Regional Fund of Science (project no. 17-45-240884), the Russian Foundation for Basic Research (project no. 16-04-01677-a), and the Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, governmental assignment, theme no. 56.1.4. for 2013-2020. . - ISSN 1028-334X. - ISSN 1531-8354РУБ Geosciences, Multidisciplinary

Аннотация: Laboratory experiments were conducted in a hermetically sealed growth chamber with two soil samples obtained from the arctic tundra zone with different levels of moisture. Samples were maintained at a growing season typical of the region from which they were taken, and for the sample with a high level of moisture it was made twice: with the temperature in accord with natural conditions and one increased by 2 degrees C. It has been shown that heating of the overmoistened tundra soil by 2 degrees C can increased the average carbon dioxide emissions by almost two times (from 75 to 100-150 mg m(-2) h(-1)). Upon the application of heat, no significant increase in methane emission was observed.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Sukachev Inst Forests, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Barkhatov, Yu. V.; Ushakova, S. A.; Shikhov, V. N.; Evgrafova, S. Yu.; Tikhomirov, A. A.; Degermendzhi, A. G.; Russian Foundation for Basic Research; Krasnoyarsk Krai Government; Krasnoyarsk Regional Fund of Science [17-45-240884]; Russian Foundation for Basic Research [16-04-01677-a]; Institute of Biophysics, Siberian Branch, Russian Academy of Sciences [56.1.4.]