CGRG Bibliography of Canadian Geomorphology
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Author : Goto-Azuma, K.; Shiraiwa, T.; Matoba , S.; Segawa, T.; Kanamori , S.; Fujii, Y.; and Fisher, D.A.
Date : 2006.
Title : Climate and environmental variability in the North Pacific region during the last 100 years.
Publication : North Pacific Climate Workshop. Canadian Institute of Ocean Sciences, Sidney, British Columbia, Canada. March 1 to 3, 2006.
Issue :
Page(s) :
Abstract
Three ice cores were recovered on, or near Mount Logan, Yukon, Canada at 3, 4.1 and 5.4 km above sea level in 2002. The one from King Col (4135m above sea level) was drilled by a Japanese team down to 220.52 m depth. The top 115 m of the core has been cut and melted for analyses of ion chemistry, stable isotopes, micro-particles, tritium, snow algae, bacteria etc. ?18O, ?D, NO3-, SO42-, NH4+, Ca2+, MSA, sea-salt ions and micro-particles show seasonal variations. The core was dated by annual layer counting, with a tritium peak at 58 m depth and a volcanic SO42- peak at 112 m depth as reference horizons. The core was dated back to 1909 A. D. at 115 m depth. The King Col core provides us with a high time-resolution record of the past 100 year climate and environmental variability in the North Pacific region. NO3-and SO42- started to increase about 1940 due to influx of anthropogenic air pollutants. Concentrations of Ca2+ and MSA were associated with the PDO (Pacific Decadal Oscillation), Ca2+ being negatively correlated to the PDO index, while MSA being positively correlated to the PDO index with a several-year lag. The King Col core would enable us to investigate the variability of atmospheric circulation and its influence on the environmental changes in the North Pacific region.
Bibliography of Canadian Geomorphology