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Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, U.S.A
Our understanding of tundra fire effects in Northern Alaska is limited because fires have been relatively rare. We sampled a 70+ year-old burn visible in a 1948 aerial photograph for vegetation composition and structure, soil attributes, terrain rugosity, and thermokarst pit density. Between 1948 and 2017 the burn initially became wetter as ice wedges melted but then drained and dried as the troughs became hydrologically connected. The reference tundra has become wetter over the last few decades and appears to be lagging through a similar sequence. The burn averaged 2.5 °C warmer than the reference tundra at 30 cm depth. Thinning of organic soil following fire appears to dramatically accelerate the background degradation of ground-ice features in response to climate change and promotes a plant community that is distinct in terms of taxa and structure, dominated by tall willows and other competitive, rather than cold-tolerant, species. The cover of sedges and mosses is low while that of willows and grass is high relative to the reference tundra. The changes in plant community composition and structure, increasing ground temperature, and thermokarst lead us to expect the observed biophysical changes to the tundra will persist centuries into the future.journal articl
重力観測研究のための機関横断型情報交換サイトの構築
極域データサイエンスに関する研究集会II
日時:2024年2月26日(月)13:00〜18:00, 2月27日(火)09:30〜12:00
場所:情報・システム研究機構データサイエンス共同利用基盤施設DS棟1F(大会議室H108),オンライン
主催:情報・システム研究機構データサイエンス共同利用基盤施設極域環境データサイエンスセンターconference objec
南極昭和基地における発電設備保守のDX化とAI化の準備へ
第20回南極設営シンポジウム
2024年6月25日(火)国立極地研究所極地観測棟3F
主催:国立極地研究所conference objec
大気中宇宙線生成核種Be-7の観測データセットについて
極域データサイエンスに関する研究集会II
日時:2024年2月26日(月)13:00〜18:00, 2月27日(火)09:30〜12:00
場所:情報・システム研究機構データサイエンス共同利用基盤施設DS棟1F(大会議室H108),オンライン
主催:情報・システム研究機構データサイエンス共同利用基盤施設極域環境データサイエンスセンターconference objec
昭和基地のゼロエミッションに向けたクラウド型エネルギー管理手法の研究
第20回南極設営シンポジウム
2024年6月25日(火)国立極地研究所極地観測棟3F
主催:国立極地研究所conference objec
南極昭和基地大型大気レーダーによる電離圏沿磁力線不規則構造の観測
極域データサイエンスに関する研究集会II
日時:2024年2月26日(月)13:00〜18:00, 2月27日(火)09:30〜12:00
場所:情報・システム研究機構データサイエンス共同利用基盤施設DS棟1F(大会議室H108),オンライン
主催:情報・システム研究機構データサイエンス共同利用基盤施設極域環境データサイエンスセンターconference objec
Observations of two juvenile southern elephant seals hauling out on the Soya Coast, Lützow-Holm Bay, East Antarctica
We report observations of two juvenile southern elephant seals (SES), Mirounga leonina, hauling out on the Soya Coast, Lützow-Holm Bay, East Antarctica, in January 2019. To our knowledge, there have been no previous reports of SES hauling out in this region despite frequent biological research activities under the Japanese Antarctic Research Expedition since the 1960s. One juvenile seal was observed resting at the shore of Lake Suribachi Ike (69° 28′ 58′′S, 39° 39′ 21′′E) in Skarvsnes, located 1.2 km inland from the closest coastline, on 26 January 2019. Another juvenile seal was observed on the seashore of Langhovde (69° 12′ 54′′S, 39° 37′ 31′′E) on 30 January 2019. Both SES showed no signs of molting. At the time of our observations, Lützow-Holm Bay was covered with fast sea ice, extending >80 km from the observation sites, suggesting that the SES penetrated the fast sea ice area using cracks and leads for breathing to reach the snow/ice-free coastline.departmental bulletin pape