Record details

    Inferred gas hydrate and permafrost stability history models linked to climate change in the Beaufort-Mackenzie Basin, Arctic Canada
    Majorowicz, J.
    Osadetz, K.
    Šafanda, Jan
Publication type
    článek v odborném periodiku
Source title - serial
    Climate of the Past
    Roč. 8, č. 2
    s. 667-682
    Rozsah: 16 s. : P
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    Beaufort-Mackenzie Basin
    climate change
Abstract (in english)
   Atmospheric methane from episodic gas hydrate (GH) destabilization, the "clathrate gun" hypothesis, is proposed to affect past climates, possibly since the Phanerozoic began or earlier. In the terrestrial Beaufort-Mackenzie Basin (BMB), GHs occur commonly below thick ice-bearing permafrost (IBP), but they are rare within it. Two end-member GH models, where gas is either trapped conventionally (Case 1) or where it is trapped dynamically by GH formation (Case 2), were simulated using profile (1-D) models and a 14 Myr ground surface temperature (GST) history based on marine isotopic data, adjusted to the study setting, constrained by deep heat flow, sedimentary succession conductivity, and observed IBP and Type I GH contacts in Mallik wells. Models consider latent heat effects throughout the IBP and GH intervals.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    9. 12. 2013