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Title: Structural segmentation controlled the 2015 Mw 7.8 Gorkha earthquake rupture in Nepal
Authors: Hubbard, Judith
Almeida, Rafael
Foster, Anna
Sapkota, Soma Nath
Bürgi, Paula
Tapponnier, Paul
Keywords: Himalayas
Science::Geology::Volcanoes and earthquakes
Issue Date: 2016
Source: Hubbard, J., Almeida, R., Foster, A., Sapkota, S. N., Bürgi, P., & Tapponnier, P. (2016). Structural segmentation controlled the 2015 Mw7.8 Gorkha earthquake rupture in Nepal. Geology, 44(8), 639-642. doi:10.1130/G38077.1
Series/Report no.: Geology
Abstract: There is increasing evidence that millennial-scale climate variability played an active role on orbital-scale climate changes, but the mechanism for this remains unclear. A 230Th-dated stalagmite δ18O record between 88 and 22 thousand years (ka) ago from Yongxing Cave in central China characterizes changes in Asian monsoon (AM) strength. After removing the 65°N insolation signal from our record, the δ18O residue is strongly anti-phased with Antarctic temperature variability on sub-orbital timescales during the Marine Isotope Stage (MIS) 3. Furthermore, once the ice volume signal from Antarctic ice core records were removed and extrapolated back to the last two glacial-interglacial cycles, we observe a linear relationship for both short- and long-duration events between Asian and Antarctic climate changes. This provides the robust evidence of a link between northern and southern hemisphere climates that operates through changes in atmospheric circulation. We find that the weakest monsoon closely associated with the warmest Antarctic event always occurred during the Terminations. This finding, along with similar shifts in the opal flux record, suggests that millennial-scale events play a key role in driving the deglaciation through positive feedbacks associated with enhanced upwelling and increasing CO2.
ISSN: 0091-7613
DOI: 10.1130/G38077.1
Rights: © 2016 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles
EOS Journal Articles

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