過去５０年間にわたる南極リュツォ・ホルム湾定着氷の変動

• 牛尾 収輝

  情報・システム研究機構国立極地研究所

• 若林 裕之

  宇宙航空研究開発機構 現:日本大学工学部情報工学科

• 西尾 文彦

  千葉大学環境リモートセンシング研究センター

書誌事項

タイトル別名

• Sea ice variation in Luetzow-Holmbukta, Antarctica, during the last fifty years
• カコ 50ネンカン ニ ワタル ナンキョク リュツォ ホルムワン テイチャクヒョウ ノ ヘンドウ

抄録

Satellite images obtained from Lützow-Holmbukta (Lützow-Holm Bay; around 69°S, 38°E), Antarctic, have revealed frequent occurrences of ice-breakup events since the 1980s. Such unstable conditions continued for several to ten-odd years, and its variability coincides well with the characteristics of snow accumulation patterns on sea ice; in other words, breakups are often observed during periods of less snow. In contrast, during the 1950s-70s, landfast ice seems to have been extremely stable, judging from the appearance of a long glacier tongue flowing into the fast-ice field. Expansion and contraction of the floating ice tongue probably depends on its surrounding fast-ice condition; therefore the unstable sea-ice condition for the last two decades has shortened the ice tongue. A decrease in the snow cover on sea ice and warm periods of summer-autumn led to the weakening of the landfast ice as the melt season progressed; broken floes were then transported offshore by the prevailing southerly winds.

収録刊行物

• 雪氷

  雪氷 68 (4), 299-305, 2006

  公益社団法人 日本雪氷学会

キーワード

• 南極
• 海氷
• 定着氷
• 氷河浮氷舌

詳細情報

• CRID: 1390282681438995328
• NII論文ID: 10018013700
• NII書誌ID: AN00131221
• DOI: 10.5331/seppyo.68.299
• ISSN: 18836267
• ISSN: 03731006
• NDL書誌ID: 8043645
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8043645
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可