Record details

    Methane gas hydrate stability models on continental shelves in response to glacio-eustatic sea level variations: examples from Canadian oceanic margins
    Majorowicz, J.
    Osadetz, K.
    Šafanda, Jan
Publication type
    článek v odborném periodiku
Source title - serial
    Roč. 6, č. 11
    s. 5775-5806
    Rozsah: 32 s.
Subject category
    Canadian shelf
    climate change influence
    GH stability
    marine gas hydrates (GH)
Abstract (in english)
   We model numerically regions of the Canadian continental shelves during successive glacio-eustatic cycles to illustrate past, current and future marine gas hydrate (GH) stability and instability. These models indicated that the marine GH resource has dynamic features and the formation age and resource volumes depend on the dynamics of the ocean-atmosphere system as it responds to both natural (glacial-interglacial) and anthropogenic (climate change) forcing. Our models focus on the interval beginning three million years ago (i.e., Late Pliocene-Holocene). They continue through the current interglacial and they are projected to its anticipated natural end. During the current interglacial the gas hydrate stability zone (GHSZ) thickness in each region responded uniquely as a function of changes in water depth and sea bottom temperature influenced by ocean currents.
   In general, the GHSZ in the deeper parts of the Pacific and Atlantic margins (>= 1316 m) thinned primarily due to increased water bottom temperatures.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    23. 10. 2014