Accession Number:

ADA550138

Title:

Beaufort Sea Methane Hydrate Exploration: Energy and Climate Change

Descriptive Note:

Memorandum rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

2011-05-27

Pagination or Media Count:

34.0

Abstract:

This is a geochemical report for the MITAS 1 expedition on the Beaufort Sea during September 2009, aboard the USCG Polar Sea. The overall cruise focus integrated research expertise in coastal ocean geophysics, sediment geochemistry, dissolved and free methane fluxes through the water column and into the atmosphere, sediment and water column microbiology and biogeochemistry, and detailed characterization of the sub-seafloor geology to address the following research topics 1 Acquire and integrate seismic, heatflow, geochemical, and lithostratigraphic data for evaluation of deep sediment hydrate distributions 2 Estimate spatial variation and controls on the vertical methane diffusion as compared to variations in lithostratigraphy, geologic structures, water column temperatures, heatflow, seismic profiles, and water depth 3 Develop and calibrate models to evaluate sediment hydrate loading, hydrate destabilization through warming, and the fate of methane after hydrate destabilization 4 Determine and model the transport of methane from the sediment through the water column into the atmosphere 5 Study the control of total methane emissions by microbial methane consumption in the sediment and in the water column and 6 Study the contribution of methane to the benthic and pelagic carbon cycling. This report provides a summary of onboard geochemical analyses of sediment porewater through the regions cored and supports data interpretation for the research topics listed above.

Subject Categories:

  • Organic Chemistry
  • Physical and Dynamic Oceanography
  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE