ログイン
言語:

WEKO3

  • トップ
  • ランキング
To
lat lon distance
To

Field does not validate



インデックスリンク

インデックスツリー

メールアドレスを入力してください。

WEKO

One fine body…

WEKO

One fine body…

アイテム

  1. 機関資料
  2. 旧機関資料
  3. 東北区水産研究所

東北海区における暖水塊の消長(1)

https://fra.repo.nii.ac.jp/records/2007228
https://fra.repo.nii.ac.jp/records/2007228
155909ef-90e8-4d70-8384-0ed8301a0aaf
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2024-06-10
タイトル
タイトル 東北海区における暖水塊の消長(1)
言語 ja
言語
言語 jpn
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ departmental bulletin paper
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 武藤, 清一郎

× 武藤, 清一郎

WEKO 3546

en Muto, Seiichiro

ja 武藤, 清一郎
東北区水産研究所

ja-Kana ムトウ, セイイチロウ

Search repository
黒田, 隆哉

× 黒田, 隆哉

WEKO 3566

en Kuroda, Ryuya

ja 黒田, 隆哉
東北区水産研究所

ja-Kana クロダ, リュウヤ

Search repository
荒井, 永平

× 荒井, 永平

en Arai, Eihei

ja 荒井, 永平
東北大学

ja-Kana アライ, エイヘイ

Search repository
抄録
内容記述タイプ Abstract
内容記述 The sea condition in the North-eastern sea of Japan depends mainly on the trends of the Kuroshio, Oyashio and the Tsugaru warm current systems. Especially the transition area east of Sanriku or so-called polar frontal zone between the Oyashio and Kuroshio area, is characterized by the distribution of large and small warm and cold water masses (eddies) derived from the three current systems mentioned above. From the accumulation of the results obtained by oceanographical surveys in recent years, their structures and movements can be analized oceanographically to some extent. However the mechanism of their formation and the process of their decay are not yet thoroughly clear. So a study on the life cycles-the processes from birth to death-of warm water masses is needed. In the present paper the hydrographic states of the warm water masses are investigated from the results obtained by the Oceanographic Division of the Tohoku Regional Fisheries Research Laboratory and also by other oceanographic offices. 1) In 1970, '71 and '72 the large scale warm water masses were separated (cut off) from the Kuroshio area (south side of the Kuroshio front or the Kuroshio Extention) and from the Kuroshio Branch (northward stretch of high temperature and salinity water from the Kuroshio current). They remained off Sanriku for half a year, one year or more. On the contrary in 1973 and '74 the formation of warm water masses were seen only from the Kuroshio Branch and they lasted for only three or four months. 2) The separation from the Kuroshio area occurs when the amplitude of meander of the current path exceeds 120 sea miles. If the formation occurs near the parting area of the current, the mechanism of separation from the Kuroshio Branch seems to be the same as that from the Kuroshio area. However if the formation occurs near the point area of the Kuroshio Branch which intrude into the Oyashio area, it seems that the warm water mass is formed by a cutting off process by the strong meander of the Oyashio front. This type (of warm water mass) is sometimes called the warm water mass off Kushiro. 3) The structure of warm water mass corresponds to its origin (the Kuroshio area and the Kuroshio Branch) and it gradually varies as time passes. After a certain duration a homogeneous layer (in temperature and in salinity) appears within the mass and it lasts for a long period. When the mass is not changing its position, sometimes there seems to be a new supply of water from the Kuroshio area or the Kuroshio Branch and in that case the inner structure of the mass changes with a rise of both temperature and salinity. Sometimes a formation of piled up homogeneous layers is seen. 4) The size of large warm water masses separated from the Kuroshio area is over 120 seamiles in diameter and 600 to 700 meters in depth respectively. It lasts for half a year to more than a year. The mass formed on November 1969 lasted for more than twenty months. The change in quality of the mass gradually advances by mixing with surrounding water. The heat exchange with the atmosphere through the surface layer of the mass is remarkable in winter. Cooling by the atmosphere hastens the decay of a mass. The separation of small water masses from the main water mass also markedly hastens the decay. 5) The size of water masses formed near the parting area of the current of the Kuroshio Branch are almost all 100 sea miles in diameter and nearly 500 meters in depth. The size of water masses formed near the point area of the Kuroshio Branch are less than ten sea miles in diameter and less than 300 meters in depth. The maximum water temperature of the 100 meter deep layer of the former water mass is 15°or 16˚C which is nearly the same as the Kuroshio. The latter is 10˚C. Also, the temperature of the separated water mass depends on the position from where it was separated. These types of water masses generally decay within six months and the process of decay seems to be foundamentally the same as that of the large water mass separated from the Kuroshio area but the mixing with the Oyashio water is remarkable. 6) Very few oceanographical surveys have been done on the process of the decay of warm water masses, so the mechanism of decay still remains to be solved.
言語 en
bibliographic_information ja : 東北区水産研究所研究報告
en : Bulletin of Tohoku Regional Fisheries Research Laboratory

巻 35, 号 tnf_k_35_31, p. 31-71, ページ数 41, 発行日 1975-12
出版者
出版者 東北海区水産研究所
言語 ja
出版者
出版者 Tohoku Regional Fisheries Research Laboratory
言語 en
item_10002_source_id_9
収録物識別子タイプ PISSN
収録物識別子 0049-402X
item_10002_source_id_11
収録物識別子タイプ NCID
収録物識別子 AN00167637
情報源
識別子タイプ Local
関連識別子 tnf_k_35_31
関連サイト
識別子タイプ URI
関連識別子 https://agriknowledge.affrc.go.jp/RN/2010131560
言語 ja
関連名称 日本農学文献記事索引(agriknowledge)
戻る
0
views
See details
Views

Versions

Ver.1 2024-06-10 08:48:42.142613
Show All versions

Share

Mendeley Twitter Facebook Print Addthis

Cite as

エクスポート

OAI-PMH
  • OAI-PMH JPCOAR 2.0
  • OAI-PMH JPCOAR 1.0
  • OAI-PMH DublinCore
  • OAI-PMH DDI
Other Formats
  • JSON
  • BIBTEX

Confirm


Powered by WEKO3


Powered by WEKO3