南極昭和基地建物「夏期隊員宿舎」の仮組報告（工数まとめ）

第19回南極設営シンポジウム2023年5月16日（火）Zoomウェビナーによるオンライン開催主催：国立極地研究

全地球電気回路研究のための地上大気電場観測データのデータベース化とデータ解析システムの開発

極域データサイエンスに関する研究集会日時：2023年2月20日（月）11:00〜18:00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

レーダーインバージョン観測のためのアンテナ空間特性精密推定技術の開発

極域データサイエンスに関する研究集会日時：2023年2月20日（月）11:00〜18:00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

Development of the AMIDER system: a database application for open science

AMIDER project aims at promoting open science by providing an integrated database application to explore scientific datasets. The AMIDER system is planned to start operation in 2023 focusing on the fields related to polar science. One of its unique features is the visualization in a uniform format regardless of dataset types. Scientific data in various fields, such as geospace science, atmospheric science, geoscience, and life science, are inclusively displayed with a thumbnail image and snippet for each dataset. This catalog view is designed so that the contents of each dataset can be imagined at a glance, inducing access from a user who is not familiar with the dataset. Each dataset has a uniform design page composed of five sections: main images, a data-download interface, data plots, related dataset links, and a metadata table. The data-download interface not only accesses data repositories but also provides a function to convert data files to the ASCII format from dedicated formats such as Common Data Format (CDF) and Network Common Data Form(NetCDF) in space science. The related dataset section is one of the unique functions of our system; we calculate and register a correlation score between each dataset or data file, and several datasets with relatively high scores are displayed. This function provides users with a cross-disciplinary “walk-around” experience between datasets. These applications are optimized to promote open science and are realized by our careful data curation. Many datasets are ready for publication, and the final preparation of the system is underway.SCAR Open Science Conference 2022, 4 Aug. 2022, SCA

New approaches to modeling the critical refreezing length of a Philberth melt probe for ice sheet exploration

In recent years, interest in using Philberth melt probes in the exploration of subglacial lakes or extraterrestrial ice-covered planets has significantly increased. Consequently, several Philberth melt probes have been developed or are currently being developed. The critical refreezing length is a key parameter in determining the distribution of the lateral heater of the Philberth melt probe. In this study, two new approaches for calculating the critical refreezing length were proposed. Approach I was established based on the refreezing of a virtual borehole, whereas approach II was developed in the COMSOL Multiphysics 5.6a software by modeling the phase change of water and ice in the non-heated section of the Philberth melt probe. The two novel approaches were validated with the field test results of RECoverable Autonomous Sonde (RECAS) in Antarctica. The difference between the two approaches and the existing calculation methods was less than 32% and approach I presented a smaller critical refreezing length. The thermal head efficiency and ice temperature had significant influence on the critical refreezing length. Usually, the critical refreezing length increased with an increase in the thermal-head diameter, penetration rate, and ice temperature, whereas it decreased with an increase in the thermal head efficiency

Polar federated search: New infrastructure to support the polar community

This paper reports how the World Data System International Technology Office (WDS-ITO) has contributed resources in the Polar Research Data Management community. The office has focused on federated search and data enhancement practices that bridge the gap between data holdings in the Arctic and Antarctic polar research communities and has built a shared catalog characterized by harmonized “dialects\u27\u27 of metadata standards. The portal, referred to as the Polar Federated Search (PFS) site, is part of a larger set of WDS-ITO polar support activities and allows researchers to find data that has been published in multiple repositories serving both Arctic and Antarctic data (World Data System – International Technology Office, 2022). The portal provides federated search capability through a single interface. The PFS indexes repository landing pages that have been enriched with the addition of semantic markup marrying the best practices from the web publishing world with domain specific metadata. This technique leads to broader discovery, notably by Google Dataset Search, and better reuse of data repository holdings. Increasingly, the base ontology that has been adopted for use in these markup activities is Schema.org (SDO) a simple ontology developed in the commercial sector. This article outlines the steps and progressions made throughout the first year of PFS development, its highlights, and describes how these infrastructures move far beyond metadata discovery to include data integration, analysis, visualization and advanced, reproducible workflows

ACM導入による衛星通信増速実証実験の結果について

第19回南極設営シンポジウム2023年5月16日（火）Zoomウェビナーによるオンライン開催主催：国立極地研究

AMIDER: 極域科学を中心とした分野横断型データカタログ

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（ROIS-DS）極域環境データサイエンスセンター（PEDSC）は、極域科学を中心とする科学データの管理や利活用を支援・促進する活動を進めている。その柱の一つが、分野横断型データベースAMIDERの開発である。AMIDERプロジェクトの目標は、専門家でなくとも科学データへアクセスできる環境を整備し、オープンサイエンスや異分野融合研究を促進することである。そのため、生命科学・地球科学・宇宙科学などあらゆる研究分野のデータを統一的インターフェースで閲覧できるデータカタログなどを開発している。Japan Open Science Summit 2023, 21 Jun. 202

金沢大学の重力データの現況と重力異常データの解析事例

令和4年度ROIS-DS-JOINT2022共同研究集会「オープンサイエンス時代の重力観測・データの流通と利活用」日時：2022年12月19日（月）13:25〜12月20日（火）12:30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H108-1，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

Comparison of the depolarization measurement capability of a lidar ceilometer with cloud particle sensor sondes: A case study of liquid water clouds

Liquid clouds scatter the downward shortwave radiation more than ice clouds, which modulates the surface heat budget. Therefore, a better representation of the cloud phase in climate models, validated by observations, is needed to improve future projections. A ceilometer is a land-based observation system for clouds. This study focused on a new lidar ceilometer with a depolarization function (Vaisala CL61) for distinguishing cloud phases. The data were compared with cloud particle sensor (CPS) sondes at Kitami City in Japan in March 2022. Multiple layers characterized one case with smaller liquid water content at the lower boundary layer, while the other case was a deep liquid cloud layer case with more liquid water content at the cloud bottom. The linear depolarization ratios were well matched in both observing systems. The CL61 detected the signal below the first layer with the amount of liquid water content at 0.4 g m−3 (or bottom of the layer with 0.4 g m−3)