Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note)
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 (small...
Main Authors: | , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/National Institute of Polar Research/Alfred-Wegener-Institute for Polar and Marine Research
2003
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2471 http://id.nii.ac.jp/1291/00002471/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2471&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00002471 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00002471 2023-05-15T16:27:03+02:00 Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) Kimiko Shimohara Atsushi Miyamoto Kinji Hyakutake Hitoshi Shoji Morimasa Takata Sepp Kipfstuhl 2003-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2471 http://id.nii.ac.jp/1291/00002471/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2471&item_no=1&attribute_id=18&file_no=1 en eng Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/National Institute of Polar Research/Alfred-Wegener-Institute for Polar and Marine Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2471 http://id.nii.ac.jp/1291/00002471/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 57, 161-167(2003-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2471&item_no=1&attribute_id=18&file_no=1 cloudy band gray value GRIP NGRIP Departmental Bulletin Paper P(論文) 2003 ftnipr 2022-11-12T19:43:14Z 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. Report Greenland Greenland ice cores GRIP ice core Memoirs of National Institute of Polar Research NGRIP Polar Research National Institute of Polar Research Repository, Japan Greenland |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
cloudy band gray value GRIP NGRIP |
spellingShingle |
cloudy band gray value GRIP NGRIP Kimiko Shimohara Atsushi Miyamoto Kinji Hyakutake Hitoshi Shoji Morimasa Takata Sepp Kipfstuhl Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
topic_facet |
cloudy band gray value GRIP NGRIP |
description |
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. |
format |
Report |
author |
Kimiko Shimohara Atsushi Miyamoto Kinji Hyakutake Hitoshi Shoji Morimasa Takata Sepp Kipfstuhl |
author_facet |
Kimiko Shimohara Atsushi Miyamoto Kinji Hyakutake Hitoshi Shoji Morimasa Takata Sepp Kipfstuhl |
author_sort |
Kimiko Shimohara |
title |
Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
title_short |
Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
title_full |
Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
title_fullStr |
Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
title_full_unstemmed |
Cloudy band observations for annual layer counting on the GRIP and NGRIP, Greenland, deep ice core samples (scientific note) |
title_sort |
cloudy band observations for annual layer counting on the grip and ngrip, greenland, deep ice core samples (scientific note) |
publisher |
Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/Kitami Institute of Technology/National Institute of Polar Research/Alfred-Wegener-Institute for Polar and Marine Research |
publishDate |
2003 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2471 http://id.nii.ac.jp/1291/00002471/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2471&item_no=1&attribute_id=18&file_no=1 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores GRIP ice core Memoirs of National Institute of Polar Research NGRIP Polar Research |
genre_facet |
Greenland Greenland ice cores GRIP ice core Memoirs of National Institute of Polar Research NGRIP Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2471 http://id.nii.ac.jp/1291/00002471/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 57, 161-167(2003-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2471&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766016087852318720 |