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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
Get PDF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
古水温データの季節バイアスと氷期・間氷期変動
Get PDF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
Get PDF第20回南極設営シンポジウム
2024年6月25日（火）
場所：国立極地研究所極地観測棟3F，オンライン
主催：国立極地研究所南極観測センターconference outpu
Temporal changes in iodine-129 and radiocesium in the Canada Basin in the Arctic Ocean between 1993 and 2020
No full textThe Arctic Ocean plays an important role in global climate and global warming through freshwater and heat exchange with subarctic waters. A better understanding of circulation time scales in the Arctic Ocean is essential to predict changes in climate and biogeochemical cycling in the Arctic Ocean. 129I and 137Cs, which have been discharged from the nuclear fuel-reprocessing facilities, have been employed to determine the time scale of the circulation in the Arctic Ocean. However, its temporal change has not been understood well. In 2017, 2019, and 2020, we measured 129I and 137Cs in the Canada Basin in the Arctic Ocean. Using our new and historical data, we discuss temporal changes in the circulation in the basin between 1993 and 2020. The tracer ages derived from the 129I/137Cs ratio indicate that the transport of the Atlantic water into the Canada Basin was accelerated in 2020. This is consistent with results of recent studies that indicated the intensified inflow of the Atlantic water into the eastern Arctic Ocean in the late 2010s, which is termed “atlantification”. Our results confirmed the “atlantification” in the Canada Basin by temporal changes in the transient tracers for the first time.journal articl
Performance monitoring of the wastewater system of Bharati Station, Antarctica
No full textThe untouched condition of Antarctica's environment is a result of its inherent absence of human activity. Nevertheless, with the introduction of scientific research stations and human presence, a considerable volume of wastewater has been produced by these research facilities. The wastewater needs to be treated before discharge and has strict rules and regulations set by the Antarctic Treaty (Annexure III). However, the performance of the wastewater treatment plant and the data on the quality of the effluents being discharged into the sea by different stations are limited. In this study, the performance of the wastewater treatment plant at Bharati research station located at Larsemann Hills, East Antarctica was investigated from 2015 to 2022. Physical and chemical parameters such as pH, EC, NH4–N and COD were determined in effluents from the drinking water plant, blackwater and greywater plant from Bharati station. The pH and EC of the effluents were measured using portable probes, ammonia was measured spectrophotometrically, and COD was measured using the closed reflux digestion method. The monthly data of the effluents from 2015 to 2022 for pH, EC, NH4–N and COD indicate values within the permissible limits except for a few parameters at a certain time frame. It was observed that the pH of black, grey and drinking water varied between pH 6.5 and 9.1. Both grey and blackwater showed a decreasing conductivity trend, suggesting decreased ionic content. The blackwater exhibited an increase in ammonia concentration and COD trend, indicating higher organic pollution levels, while the grey water displayed a decreasing trend in COD, indicating a reduction in organic matter content. The study also investigated the correlation between NH4–N concentration in wastewater and greywater with levels of COD and compared these levels with standard values to assess effluent water quality. The data will provide baseline values to assess any malfunctioning of the wastewater system in treating the contaminants. Effluent data from other Antarctic stations show a high value compared with the effluents from Bharati station. Such variability largely depends on the station size, water usage and number of expedition members during the summer and winter seasons.journal articl
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
Get PDF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
Reproduction experiments on the chondrule formation of the E3 chondrites
Get PDFThe 15th Symposium on Polar Science/Ordinary sessions [OA] Antarctic Meteorite, Thu. 5 Dec. / 3F Conference room, The Institute of Statistical Mathematicsconference outpu