PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990
Seasonal variations in water structure under fast ice in Lutzow-Holm Bay, Antarctica, were observed from April to December, 1990. Two warm and oxygen-poor waters were observed. One is warmer water with temperatures higher than 0℃, salinities of more than 34.6 and oxygen less than 6 ml/l, and is foun...
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
Institute of Low Temperature Science, Hokkaido University
1992
|
Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3744 http://id.nii.ac.jp/1291/00003744/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3744&item_no=1&attribute_id=18&file_no=1 |
id |
ftnipr:oai:nipr.repo.nii.ac.jp:00003744 |
---|---|
record_format |
openpolar |
spelling |
ftnipr:oai:nipr.repo.nii.ac.jp:00003744 2023-05-15T13:49:01+02:00 PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 タキザワ タカトシ ウシオ シュウキ カワムラ トシユキ オオシマ オノ ノブオ カワグチ サダオ Takatoshi TAKIZAWA Shuki USHIO Toshiyuki KAWAMURA Kay I. OHSHIMA Nobuo ONO Sadao KAWAGUCHI 1992-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3744 http://id.nii.ac.jp/1291/00003744/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3744&item_no=1&attribute_id=18&file_no=1 en eng Institute of Low Temperature Science, Hokkaido University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3744 http://id.nii.ac.jp/1291/00003744/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 6, 106-125(1992-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3744&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1992 ftnipr 2022-12-10T19:45:46Z Seasonal variations in water structure under fast ice in Lutzow-Holm Bay, Antarctica, were observed from April to December, 1990. Two warm and oxygen-poor waters were observed. One is warmer water with temperatures higher than 0℃, salinities of more than 34.6 and oxygen less than 6 ml/l, and is found in the bottom layer deeper than 700m in the Shirase Submarine Valley. The other is found in the upper layer with temperatures of -1.4∿ -1.5℃, salinities of around 34.2 and oxygen of 6.3-6.9ml/l. The origin of both waters is a blob of the Circumpolar Deep Water (CDW) drawn from offshore, and they are admixtures of CDW with overlying Winter Water in various proportions. Due to high density, the former is confined to the bottom layers of deep troughs; on the contrary, the latter with low density can migrate in the upper layer with the water circulation in the bay. In spring a cold and oxygen-rich water (T<-1.6℃, O_2>7.2ml/l) was observed at the intermediate depth of about 250m-350m near the top of the downslope of the submarine valley. It is probable that this water was formed by sea ice processes during winter. Report Antarc* Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology Sea ice National Institute of Polar Research Repository, Japan |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Seasonal variations in water structure under fast ice in Lutzow-Holm Bay, Antarctica, were observed from April to December, 1990. Two warm and oxygen-poor waters were observed. One is warmer water with temperatures higher than 0℃, salinities of more than 34.6 and oxygen less than 6 ml/l, and is found in the bottom layer deeper than 700m in the Shirase Submarine Valley. The other is found in the upper layer with temperatures of -1.4∿ -1.5℃, salinities of around 34.2 and oxygen of 6.3-6.9ml/l. The origin of both waters is a blob of the Circumpolar Deep Water (CDW) drawn from offshore, and they are admixtures of CDW with overlying Winter Water in various proportions. Due to high density, the former is confined to the bottom layers of deep troughs; on the contrary, the latter with low density can migrate in the upper layer with the water circulation in the bay. In spring a cold and oxygen-rich water (T<-1.6℃, O_2>7.2ml/l) was observed at the intermediate depth of about 250m-350m near the top of the downslope of the submarine valley. It is probable that this water was formed by sea ice processes during winter. |
format |
Report |
author |
タキザワ タカトシ ウシオ シュウキ カワムラ トシユキ オオシマ オノ ノブオ カワグチ サダオ Takatoshi TAKIZAWA Shuki USHIO Toshiyuki KAWAMURA Kay I. OHSHIMA Nobuo ONO Sadao KAWAGUCHI |
spellingShingle |
タキザワ タカトシ ウシオ シュウキ カワムラ トシユキ オオシマ オノ ノブオ カワグチ サダオ Takatoshi TAKIZAWA Shuki USHIO Toshiyuki KAWAMURA Kay I. OHSHIMA Nobuo ONO Sadao KAWAGUCHI PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
author_facet |
タキザワ タカトシ ウシオ シュウキ カワムラ トシユキ オオシマ オノ ノブオ カワグチ サダオ Takatoshi TAKIZAWA Shuki USHIO Toshiyuki KAWAMURA Kay I. OHSHIMA Nobuo ONO Sadao KAWAGUCHI |
author_sort |
タキザワ タカトシ |
title |
PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
title_short |
PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
title_full |
PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
title_fullStr |
PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
title_full_unstemmed |
PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990 |
title_sort |
preliminary results of hydrography under fast ice in lutzow-holm bay, antarctica in 1990 |
publisher |
Institute of Low Temperature Science, Hokkaido University |
publishDate |
1992 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3744 http://id.nii.ac.jp/1291/00003744/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3744&item_no=1&attribute_id=18&file_no=1 |
genre |
Antarc* Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology Sea ice |
genre_facet |
Antarc* Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology Sea ice |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3744 http://id.nii.ac.jp/1291/00003744/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 6, 106-125(1992-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3744&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250429020110848 |