دورية أكاديمية
Recent decreases in fossil-fuel emissions of ethane and methane derived from firn air.
| العنوان: | Recent decreases in fossil-fuel emissions of ethane and methane derived from firn air. |
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| المؤلفون: | Aydin M; Department of Earth System Science, University of California, Irvine, California 92697, USA. maydin@uci.edu, Verhulst KR, Saltzman ES, Battle MO, Montzka SA, Blake DR, Tang Q, Prather MJ |
| المصدر: | Nature [Nature] 2011 Aug 10; Vol. 476 (7359), pp. 198-201. Date of Electronic Publication: 2011 Aug 10. |
| نوع المنشور: | Historical Article; Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Basingstoke : Nature Publishing Group Original Publication: London, Macmillan Journals ltd. |
| مواضيع طبية MeSH: | Fossil Fuels*/history , Fossil Fuels*/statistics & numerical data, Atmosphere/*chemistry , Ethane/*analysis , Methane/*analysis , Snow/*chemistry, Antarctic Regions ; Biofuels ; Biomass ; Fires ; Geography ; Greenland ; History, 20th Century ; History, 21st Century ; Ice/analysis ; Models, Theoretical |
| مستخلص: | Methane and ethane are the most abundant hydrocarbons in the atmosphere and they affect both atmospheric chemistry and climate. Both gases are emitted from fossil fuels and biomass burning, whereas methane (CH(4)) alone has large sources from wetlands, agriculture, landfills and waste water. Here we use measurements in firn (perennial snowpack) air from Greenland and Antarctica to reconstruct the atmospheric variability of ethane (C(2)H(6)) during the twentieth century. Ethane levels rose from early in the century until the 1980s, when the trend reversed, with a period of decline over the next 20 years. We find that this variability was primarily driven by changes in ethane emissions from fossil fuels; these emissions peaked in the 1960s and 1970s at 14-16 teragrams per year (1 Tg = 10(12) g) and dropped to 8-10 Tg yr(-1) by the turn of the century. The reduction in fossil-fuel sources is probably related to changes in light hydrocarbon emissions associated with petroleum production and use. The ethane-based fossil-fuel emission history is strikingly different from bottom-up estimates of methane emissions from fossil-fuel use, and implies that the fossil-fuel source of methane started to decline in the 1980s and probably caused the late twentieth century slow-down in the growth rate of atmospheric methane. |
| التعليقات: | Comment in: Nature. 2011 Aug 11;476(7359):157-8. (PMID: 21833078) |
| References: | Nature. 2006 Sep 28;443(7110):439-43. (PMID: 17006511) Proc Natl Acad Sci U S A. 2008 Dec 16;105(50):19617-21. (PMID: 19066224) Nature. 2010 Mar 11;464(7286):271-4. (PMID: 20220847) Science. 2011 Jan 7;331(6013):67-9. (PMID: 21212353) |
| المشرفين على المادة: | 0 (Biofuels) 0 (Fossil Fuels) 0 (Ice) L99N5N533T (Ethane) OP0UW79H66 (Methane) |
| تواريخ الأحداث: | Date Created: 20110812 Date Completed: 20110916 Latest Revision: 20211020 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1038/nature10352 |
| PMID: | 21833087 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1476-4687 |
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| DOI: | 10.1038/nature10352 |