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Main results of 4-year gas-emission crater studyтезисы доклада
- Авторы: Leibman M., Dvornikov Y., Khomutov A., Kizyakov A., Vanshtein B.
- Сборник: 5th European Conference on Permafrost, Book of Abstract
- Тезисы
- Год издания: 2018
- Место издания: Laboratoire EDYTEM, CNRS, Université Savoie Mont-Blanc
- Первая страница: 293
- Последняя страница: 294
- Аннотация: Study of gas emission craters started in 2014 using field monitoring and sampling, laboratory testing, and remotesensing data analysis. Documented are six craters, all in the north of West Siberia in a narrow range of latitudes. Field research covered three craters on Yamal and Gydan Peninsulas, remote sensing was applied to 4 craters and a number of pre-crater mounds. We collected samples in the crater walls, in the intra-crater lakes, other lakes and ground ice exposures. Ions, 18O, 2H, and 13C isotopes, organic matter, methane concentration were measured in the water and ice in laboratory. All data obtained confirmed that craters were preceded by mounds, exposed tabular ground ice in their walls, and showed very high concentration of methane initially in the crater air and later in the intra-crater lake. We hypothesize that crater formation was due to methane emission resulting from ground temperature rise. https://hal.archives-ouvertes.fr/hal-01816115/
- Добавил в систему: Кизяков Александр Иванович