Skip header and navigation

1 records – page 1 of 1.

Unexpected changes to the global methane budget over the past 2000 years.

https://arctichealth.org/en/permalink/ahliterature95775
Source
Science. 2005 Sep 9;309(5741):1714-7
Publication Type
Article
Date
Sep-9-2005
Author
Ferretti D F
Miller J B
White J W C
Etheridge D M
Lassey K R
Lowe D C
Macfarling Meure C M
Dreier M F
Trudinger C M
van Ommen T D
Langenfelds R L
Author Affiliation
Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, USA. d.ferretti@niwa.co.nz
Source
Science. 2005 Sep 9;309(5741):1714-7
Date
Sep-9-2005
Language
English
Publication Type
Article
Abstract
We report a 2000-year Antarctic ice-core record of stable carbon isotope measurements in atmospheric methane (delta13CH4). Large delta13CH4 variations indicate that the methane budget varied unexpectedly during the late preindustrial Holocene (circa 0 to 1700 A.D.). During the first thousand years (0 to 1000 A.D.), delta13CH4 was at least 2 per mil enriched compared to expected values, and during the following 700 years, an about 2 per mil depletion occurred. Our modeled methane source partitioning implies that biomass burning emissions were high from 0 to 1000 A.D. but reduced by almost approximately 40% over the next 700 years. We suggest that both human activities and natural climate change influenced preindustrial biomass burning emissions and that these emissions have been previously understated in late preindustrial Holocene methane budget research.
PubMed ID
16151008 View in PubMed
Less detail