P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition
[1] New ice core analyses show that the prominent rise in atmospheric methane concentration at Dansgaard-Oeschger event 21 was interrupted by a century-long 20 % decline, which was previously unrecognized. The reversal was found in a new 100-year resolution study of methane in the GISP2 ice core, en...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.597.3384 2023-05-15T16:28:51+02:00 P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition E. J. Brook J. P. Severinghaus Abrupt Changes In The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.3384 http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.3384 http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf text ftciteseerx 2016-01-08T13:47:47Z [1] New ice core analyses show that the prominent rise in atmospheric methane concentration at Dansgaard-Oeschger event 21 was interrupted by a century-long 20 % decline, which was previously unrecognized. The reversal was found in a new 100-year resolution study of methane in the GISP2 ice core, encompassing the beginning of D-O event 21, which also corresponds to the transition from MIS 5b to 5a. Although a corresponding reversal (within age uncertainty) is observed in climate proxies measured in GISP2 ice, including d18Oice, electrical conductivity, light scattering, and several ions, this feature has not been discussed previously. Abrupt changes in methane are paralleled by changes in d15N of trapped air, a quantity that reflects local temperature change at Greenland summit. The reversal described here supports the hypothesis that climate can be unstable during major transitions, as was previously described for the last deglaciation. Citation: Grachev, A. M. Text Greenland ice core Unknown Greenland |
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English |
description |
[1] New ice core analyses show that the prominent rise in atmospheric methane concentration at Dansgaard-Oeschger event 21 was interrupted by a century-long 20 % decline, which was previously unrecognized. The reversal was found in a new 100-year resolution study of methane in the GISP2 ice core, encompassing the beginning of D-O event 21, which also corresponds to the transition from MIS 5b to 5a. Although a corresponding reversal (within age uncertainty) is observed in climate proxies measured in GISP2 ice, including d18Oice, electrical conductivity, light scattering, and several ions, this feature has not been discussed previously. Abrupt changes in methane are paralleled by changes in d15N of trapped air, a quantity that reflects local temperature change at Greenland summit. The reversal described here supports the hypothesis that climate can be unstable during major transitions, as was previously described for the last deglaciation. Citation: Grachev, A. M. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. J. Brook J. P. Severinghaus Abrupt Changes In |
spellingShingle |
E. J. Brook J. P. Severinghaus Abrupt Changes In P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
author_facet |
E. J. Brook J. P. Severinghaus Abrupt Changes In |
author_sort |
E. J. Brook |
title |
P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
title_short |
P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
title_full |
P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
title_fullStr |
P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
title_full_unstemmed |
P.: Abrupt changes in atmospheric methane at the MIS5b-5a transition |
title_sort |
p.: abrupt changes in atmospheric methane at the mis5b-5a transition |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.3384 http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_source |
http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.3384 http://icebubbles.ucsd.edu/Publications/Grachev_et_al_2007.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766018525356359680 |