СОВРЕМЕННАЯ ДИНАМИКА ПОДВОДНОЙ МЕРЗЛОТЫ И ЭМИССИЯ МЕТАНА НА ШЕЛЬФЕ МОРЕЙ ВОСТОЧНОЙ АРКТИКИ


https://doi.org/10.15356/2076-6734-2012-2-97-105

Аннотация

Рассматривается эмиссия метана в связи с изменениями многолетнемёрзлых донных отложений на шельфе морей Восточной Арктики за период с начала затопления 9–6 тыс. л.н. до настоящего времени и далее до конца текущего тысячелетия. Оценка проводится на основе физически полной модели гидротермического режима грунтов. Показано, что вклад в среднегодовую глобальную температуру воздуха за счёт повышенной эмиссии метана на морском шельфе составляет около 0,01 ºС. Даже для климатического сценария, в котором завышается возможный диапазон увеличения температуры придонных вод, к концу 3000 г. мощность верхнего оттаявшего слоя донных отложений составит 90 м и не достигнет верхней границы зоны распространения гидратов, находящейся на уровне 100–140 м подо дном шельфа. Полученные результаты не подтверждают широко обсуждаемую гипотезу о возможности «метановой катастрофы» на шельфе морей Восточной Арктики.

Об авторах

О. А. Анисимов
Государственный гидрологический институт, Санкт-Петербург
Россия


И. И. Борзенкова
Государственный гидрологический институт, Санкт-Петербург
Россия


С. А. Лавров
Государственный гидрологический институт, Санкт-Петербург
Россия


Ю. Г. Стрельченко
Государственный гидрологический институт, Санкт-Петербург
Россия


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Дополнительные файлы

Для цитирования: Анисимов О.А., Борзенкова И.И., Лавров С.А., Стрельченко Ю.Г. СОВРЕМЕННАЯ ДИНАМИКА ПОДВОДНОЙ МЕРЗЛОТЫ И ЭМИССИЯ МЕТАНА НА ШЕЛЬФЕ МОРЕЙ ВОСТОЧНОЙ АРКТИКИ. Лёд и Снег. 2012;52(2):97-105. https://doi.org/10.15356/2076-6734-2012-2-97-105

For citation: Anisimov O.A., Borzenkova I.I., Lavrov S.A., Strel’chenko Y.G. THE CURRENT DYNAMICS OF THE SUBMARINE PERMAFROST AND METHANE EMISSION ON THE SHELF OF THE EASTERN ARCTIC SEAS. Ice and Snow. 2012;52(2):97-105. https://doi.org/10.15356/2076-6734-2012-2-97-105

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