---
attributes: ~
caption: 'a) Conceptual diagram illustrates how glacial ice becomes unstable and begins collapsing en masse when pressure on underlying permafrost is reduced and CH4 is released into the atmosphere, initiating the positive feedback cycle shown, resulting in the possible release of 20 times the carbon in all estimated crude oil reserves. b) At the sea cliffs in South Australia, mineralized deposits (the yellow dolomite) from the fossil seeps are exposed within Precambrian tidal deposits. The yellow dolomite forms from a chemical reaction as the CH4 is oxidized in the sediment, providing a record of past methane release from the melting clathrates. Credit: M. Kennedy and D. Mrofka, University of California, Riverside; and C. von der Borch, Flinders University.'
chapter_identifier: ~
cited_by: []
contributors: []
create_dt: ~
description: 'a) Conceptual diagram illustrates how glacial ice becomes unstable and begins collapsing en masse when pressure on underlying permafrost is reduced and CH4 is released into the atmosphere, initiating the positive feedback cycle shown, resulting in the possible release of 20 times the carbon in all estimated crude oil reserves. b) At the sea cliffs in South Australia, mineralized deposits (the yellow dolomite) from the fossil seeps are exposed within Precambrian tidal deposits. The yellow dolomite forms from a chemical reaction as the CH4 is oxidized in the sediment, providing a record of past methane release from the melting clathrates. Credit: M. Kennedy and D. Mrofka, University of California, Riverside; and C. von der Borch, Flinders University.'
display_name: Methane Release from Ancient Landforms
files:
  - display_name: our_changing_planet_2010_image__5_20091209_1568636232.jpg
    file: 31/2b/9f76a6465b5075dda4cd20c0c48f/our_changing_planet_2010_image__5_20091209_1568636232.jpg
    href: http://data.globalchange.gov/assets/31/2b/9f76a6465b5075dda4cd20c0c48f/our_changing_planet_2010_image__5_20091209_1568636232.jpg
    identifier: 36b77aa3-d4d8-4b1d-a726-29f52b534d57
    landing_page: ~
    location: ~
    mime_type: image/jpeg
    sha1: 2de2e88d122223c32b53f55ad8ca0d3695a4fcb2
    size: 214106
    thumbnail: 31/2b/9f76a6465b5075dda4cd20c0c48f/.thumb-36b77aa3-d4d8-4b1d-a726-29f52b534d57.png
    thumbnail_href: http://data.globalchange.gov/assets/31/2b/9f76a6465b5075dda4cd20c0c48f/.thumb-36b77aa3-d4d8-4b1d-a726-29f52b534d57.png
    type: file
    uri: /file/36b77aa3-d4d8-4b1d-a726-29f52b534d57
    url: http://data.globalchange.gov/assets/31/2b/9f76a6465b5075dda4cd20c0c48f/our_changing_planet_2010_image__5_20091209_1568636232.jpg
href: http://52.38.26.42:8080/report/usgcrp-ocpfy2010/figure/methane-release-from-ancient-landforms.yaml
identifier: methane-release-from-ancient-landforms
kindred_figures: []
lat_max: ~
lat_min: ~
lon_max: ~
lon_min: ~
ordinal: ~
parents: []
references: []
report:
  display_name: 'Our Changing Planet: The U.S. Global Change Research Program for Fiscal Year 2010'
report_identifier: usgcrp-ocpfy2010
source_citation: ~
submission_dt: ~
time_end: ~
time_start: ~
title: Methane Release from Ancient Landforms
type: figure
uri: /report/usgcrp-ocpfy2010/figure/methane-release-from-ancient-landforms
url: ~
usage_limits: Copyright protected. Obtain permission from the original figure source.