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Eclipse Ice Core Accumulation and Stable Isotope Variability as an Indicator of North Pacific Climate

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dc.creator Kelsey, Eric P.
dc.creator Wake, Cameron P.
dc.creator Yalcin, Kaplan
dc.creator Kreutz, Karl
dc.date.accessioned 2012-11-14T22:00:12Z
dc.date.available 2013-10-15T22:18:26Z
dc.date.issued 2012-09-15
dc.identifier.citation Kelsey, Eric P., Cameron P. Wake, Kaplan Yalcin, Karl Kreutz, 2012: Eclipse Ice Core Accumulation and Stable Isotope Variability as an Indicator of North Pacific Climate. Journal of Climate, 25, 6426–6440. doi: http://dx.doi.org/10.1175/JCLI-D-11-00389.1 en_US
dc.identifier.uri http://hdl.handle.net/1957/35067
dc.description This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://www.ametsoc.org/pubs/journals/jcli/. en_US
dc.description.abstract The high accumulation rate and negligible amount of melt at Eclipse Icefield (3017 m) in the Saint Elias Range of Yukon, Canada, allows for the preservation of a high-resolution isotopic and glaciochemical records valuable for reconstruction of climatic variables. Each of the three Eclipse ice cores have a well-constrained depth–age scale with dozens of reference horizons over the twentieth century that permits an exceptional level of confidence in the results of the current calibration exercise. Stacked time series of accumulation and stable isotopes were divided into cold and warm seasons and seasons of extreme high and extreme low accumulation and stable isotope values (eight groups). For each group, season-averaged composites of 500-hPa geopotential height grids, and the individual seasons that constitute them, were analyzed to elucidate common anomalous flow patterns. This analysis shows that the most fractionated isotopes and lowest accumulation cold seasons reflect a more zonal height pattern in the North Pacific associated with negative Pacific–North American (PNA) and Pacific decadal oscillation (PDO) indices. Conversely, the least fractionated isotopes and highest accumulation cold seasons are associated with a positive PNA pattern. Although only a maximum of approximately 20% of the total number of accumulation and stable isotope seasons exhibit a relatively consistent relationship with 500-hPa geopotential height patterns, these results support the hypothesis that the most extreme accumulation and extreme isotope cold-season values in the Saint Elias Mountains are related to consistent atmospheric circulation and oceanic sea surface temperature patterns. en_US
dc.description.sponsorship This work was supported by the National Science Foundation –Office of Polar Programs (Grant 0714004). en_US
dc.language.iso en_US en_US
dc.publisher American Meteorological Society en_US
dc.relation.ispartofseries Journal of Climate en_US
dc.relation.ispartofseries Vol. 25 no. 18 en_US
dc.subject North Pacific Ocean en_US
dc.subject Pacific-North American pattern/oscillation en_US
dc.subject Teleconnections en_US
dc.subject Paleoclimate en_US
dc.subject Climate variability en_US
dc.subject Pacific decadal oscillation en_US
dc.title Eclipse Ice Core Accumulation and Stable Isotope Variability as an Indicator of North Pacific Climate en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1175/JCLI-D-11-00389.1
dc.description.embargopolicy Repository Administrators en

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