Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note)
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概要
- 論文の詳細を見る
Cloudy band stratigraphy was observed in the GRIP and NGRIP, Greenland ice cores. Gray value profiles obtained from the photographic recording were analyzed to extract annual layer signals. Simple counting of gray value peaks is effective enough when annual layer thickness is relatively small (smaller than approximately 20 mm), but smoothing of the gray value profile is needed when annual layer thickness is larger. Smoothing can be done by adopting a running mean over a range of half of annual layer thickness estimated from ice flow modeling. A comparison of the DEP profile with the gray value profile revealed that the DEP profile seems to reflect the seasonal variation in general, but not exactly.
- 国立極地研究所の論文
著者
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宮本 淳
北海道大学低温科学研究所
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Takata Morimasa
National Institute Of Polar Research
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Kipfstuhl Sepp
Alfred Wegener Institute for Polar and Marine Research
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Shoji Hitoshi
Kitami Institute of Technology
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Miyamoto Atsushi
Kitami Institute of Technology
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Shimohara Kimiko
Kitami Institute of Technology
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Hyakutake Kinji
Kitami Institute Of Technology
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Kipfstuhl Sepp
Alfred-wegener-institute For Polar And Marine Research
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Shinbori K
Hokkaido Univ. Sapporo
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Koga S
National Inst. Resources And Environment Tsukuba
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