TY - CONF

T1 - Methane Emission from lakes on continuous and isolate permafrost in Russia

AU - Федорова, Ирина Викторовна

AU - Шорникова, Анна Владимировна

AU - Чулкова, Екатерина Борисовна

AU - Арестова, Ирина Юрьевна

PY - 2023/5/15

Y1 - 2023/5/15

N2 - Greenhouse gases emission from lakes is quite significant environment question in the cryosphere. Up to know the volume of storage and reason that influence on it are underestimated. If GHG emission for the Arctic landscapes and boreal wetlands are measuring on seldom stations, data from permafrost border is insufficient.There are continuous and isolated permafrost with many lakes in Russia. Emission from the surface of thermokarst and periglacial lakes were measured in Yamal peninsula and Tunkinskaya valley (the Russian Arctic and Baikal region) in summer 2022. Both regions have natural and anthropogenic changed aquatic ecosystems. Several geochemical, ecological and hydrodynamical features of lakes were consider as well.CH4 emission from thermokarst lake near Salekhard city was 237 mgCH4·m-2·day-1 in site of volume for thermokarst lake Shorshonka in Tunkinskaya valley was more than 2000 mgCH4·m-2·day-1 (the air temperature was equal). Eutrophic lake near Tunkinskiye Goltsy Mountain Ridge gave 1020 mgCH4·m-2·day-1 in summer period. Methane concentration in lake sediments was 2.1-8.3 µg/l for lakes in southern Yamal and reached 13.6 µg/l in Baikal region. Biogenic elements concentration in all lakes as usual was in the limit. Isotope content was also a little bit strange for Shorshonka lake (4.67 δ18O, ‰). Other lakes near Salekhard city and Baikal lake had amplitude 11-16 δ18O, ‰. Therefor we can tell about strong differences for methane emission from thermokarst lakes in continuous and isolated permafrost that flux should be studied more detail.

AB - Greenhouse gases emission from lakes is quite significant environment question in the cryosphere. Up to know the volume of storage and reason that influence on it are underestimated. If GHG emission for the Arctic landscapes and boreal wetlands are measuring on seldom stations, data from permafrost border is insufficient.There are continuous and isolated permafrost with many lakes in Russia. Emission from the surface of thermokarst and periglacial lakes were measured in Yamal peninsula and Tunkinskaya valley (the Russian Arctic and Baikal region) in summer 2022. Both regions have natural and anthropogenic changed aquatic ecosystems. Several geochemical, ecological and hydrodynamical features of lakes were consider as well.CH4 emission from thermokarst lake near Salekhard city was 237 mgCH4·m-2·day-1 in site of volume for thermokarst lake Shorshonka in Tunkinskaya valley was more than 2000 mgCH4·m-2·day-1 (the air temperature was equal). Eutrophic lake near Tunkinskiye Goltsy Mountain Ridge gave 1020 mgCH4·m-2·day-1 in summer period. Methane concentration in lake sediments was 2.1-8.3 µg/l for lakes in southern Yamal and reached 13.6 µg/l in Baikal region. Biogenic elements concentration in all lakes as usual was in the limit. Isotope content was also a little bit strange for Shorshonka lake (4.67 δ18O, ‰). Other lakes near Salekhard city and Baikal lake had amplitude 11-16 δ18O, ‰. Therefor we can tell about strong differences for methane emission from thermokarst lakes in continuous and isolated permafrost that flux should be studied more detail.

KW - methane

KW - permafrost lake

KW - Yamal

KW - Baikal region

UR - https://meetingorganizer.copernicus.org/EGU23/EGU23-11497.html

U2 - 10.5194/egusphere-egu23-11497

DO - 10.5194/egusphere-egu23-11497

M3 - Abstract

T2 - <br/>European Geosciences Union General Assembly 2023

Y2 - 23 April 2023 through 28 April 2023

ER -