Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf; Nature Communications; Vol. 8

Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf; Nature Communications; Vol. 8

Detalles Bibliográficos
Parent link:	Nature Communications: open access journal Vol. 8.— 2017.— [15872, 13 р.]
Corporate Authors:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ) Международная научно-образовательная лаборатория изучения углерода арктических морей (МНОЛ ИУАМ), Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ)
Outros autores:	Shakhova N. E. Nataljya Evgenjevna, Semiletov I. P. Igor Petrovich, Gustafsson O. Orjan, Sergienko V. I. Valentin, Lobkovsky L. I. Leopold Isaevich, Dudarev O. V. Oleg Viktorovich, Tumskoy V. E. Vladimir, Grigoriev M. S. Mikhail, Mazurov A. K. Aleksey Karpovich, Salyuk A. N. Anatoly Nazarovich, Ananiev R. A. Roman, Koshurnikov A. A. Andrey, Kosmach D. A. Denis, Charkin A. N. Aleksandr Nikolaevich, Dmitrevsky N. N. Nikolay, Karnaukh V. Victor, Gunar A. Alexey, Meluzov A. Alexander, Chernykh D. Denis
Summary:	Title screen The rates of subsea permafrost degradation and occurrence of gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH4) emissions, yet these factors still require assessment. It is thought that after inundation, permafrost-degradation rates would decrease over time and submerged thaw-lake taliks would freeze; therefore, no CH4 release would occur for millennia. Here we present results of the first comprehensive scientific re-drilling to show that subsea permafrost in the near-shore zone of the ESAS has a downward movement of the ice-bonded permafrost table of ?14?cm year?1 over the past 31–32 years. Our data reveal polygonal thermokarst patterns on the seafloor and gas-migration associated with submerged taliks, ice scouring and pockmarks. Knowing the rate and mechanisms of subsea permafrost degradation is a prerequisite to meaningful predictions of near-future CH4 release in the Arctic.
Idioma:	inglés
Publicado:	2017
Subjects:	электронный ресурс труды учёных ТПУ вечная мерзлота Арктика Восточно-Сибирский шельф выбросы метан морское дно термокарстовые процессы
Acceso en liña:	http://dx.doi.org/10.1038/ncomms15872
Formato:	MixedMaterials Electrónico Capítulo de libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656075

Internet

http://dx.doi.org/10.1038/ncomms15872