Yuichi Aoyama

An inventory of ice-marginal lakes over Antarctica from 2017 to 2022 using Sentinel-2 imagery

Shuntaro Hata, Moto Kawamata, Kazuki Nakamura, Tsutomu Yamanokuchi et autres

Ice-marginal lakes in Antarctica are found between the coastal ice-free areas and the Antarctic Ice Sheet, its outlet glaciers, and the ice shelves. Since ice-marginal lakes may play a role in the surrounding environment (e.g., glacier variation and freshwater storage), recent observations …

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Publisher Correction: Mechanisms of multiple chemical sensitivity triggered by fragrance pollution

Kazuha Fujiwara, Masafumi Harada, Hiroshi Sato, Shinya Urano et autres

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Mechanisms of multiple chemical sensitivity triggered by fragrance pollution

Kazuha Fujiwara, Masafumi Harada, Hiroshi Sato, Shinya Urano et autres

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New ice-marginal lake inventory in Antarctica and its application for lake drainage detection

Shuntaro Hata, Moto Kawamata, Akihisa Hattori, Tsutomu Yamanokuchi et autres

The 16th Symposium on Polar Science/Ordinary sessions [OM] Polar meteorology and glaciology, Fri. 5 Dec. / 2F Auditorium, National Institute of Polar Research

SLR at Both Poles: Closing North–South Geometry Gaps in Global Geodesy

Toshimichi Otsubo, Yuichi Aoyama, Akihisa Hattori, Yusuke Yokota et autres

The 16th Symposium on Polar Science/Special Session [S] Future Plan of Antarctic research: towards phase XI of the Japanese Antarctic Research Project (2028-2034), IPY 2032-2033 and beyond, Wed. 3 Dec. / 2F Auditorium, National Institute of Polar Research

Understanding the Seafloor Structure of Lützow-Holmbukta Bay, East Antarctica

Masakazu Fujii, Yuichi Aoyama, Akihisa Hattori, Kenji Horie et autres

The 16th Symposium on Polar Science/Special Session [S] Future Plan of Antarctic research: towards phase XI of the Japanese Antarctic Research Project (2028-2034), IPY 2032-2033 and beyond, Wed. 3 Dec. / 2F Auditorium, National Institute of Polar Research

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Mid Holocene rapid thinning and rethickening of the East Antarctic ice sheet suggested by glacial isostatic adjustment

Jun’ichi Okuno, Akihisa Hattori, Koichiro Doi, Yuichi Aoyama et autres

Understanding East Antarctic Ice Sheet dynamics during the mid-Holocene remains challenging due to complex climate interactions. Using Global Navigation Satellite System observations and glacial isostatic adjustment modeling, we investigate the ice-sheet history in the Lützow–Holmbukta region. Here we show that scenarios incorporating …

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Rapid deceleration in the ice-flow velocity of the Shirase Glacier ice tongue and its influence on the velocity field: Observations from Sentinel-1 C-SAR

Shoji Ohkawa, Katsumi Doi, Kazuki Nakamura, Yuichi Aoyama et autres

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Mid-Holocene ice history inferred from GIA-induced crustal motion around Lützow-Holm Bay, East Antarctica

Jun’ichi Okuno, Akihisa Hattori, Koichiro Doi, Yoshiya Irie et autres

The history of ice melting and the viscoelastic properties of the mantle heavily influence Antarctic crustal deformation caused by Glacial Isostatic Adjustment (GIA). The interaction between ice history and mantle viscosity further complicates the complex Antarctic GIA. Nonetheless, geodetic observations, such as …

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Geodetic measurements and quantitative evaluation for reduced gravitational redshift uncertainty of NICT optical frequency standards

Ichikawa Ryuichi, Hidekazu Hachisu, Mamoru Sekido, T. Ido et autres

The National Institute of Information and Communications Technology (NICT) has developed optical ion clocks employing In$^{+}$ and Ca$^{+}$, as well as a Sr optical lattice clock that provides TAI calibration data to BIPM. We have started geodetic measurements near these NICT optical …

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On-shelf circulation of warm water toward the Totten Ice Shelf in East Antarctica

Daisuke Hirano, Takeshi Tamura, Kazuya Kusahara, Masakazu Fujii et autres

The Totten Glacier in East Antarctica, with an ice volume equivalent to >3.5 m of global sea-level rise, is grounded below sea level and, therefore, vulnerable to ocean forcing. Here, we use bathymetric and oceanographic observations from previously unsampled parts of the …

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Geodetic measurements and quantitative evaluation for reduced gravitational redshift uncertainty of NICT optical frequency standards

Ryuichi Ichikawa, Hidekazu Hachisu, Mamoru Sekido, T. Ido et autres

The frequency accuracy of optical atomic clocks has dramatically increased over the past 15 years, improving by more than two orders of magnitude from 16 digits of precision to 18 or even 19 digits of precision. Since around 2015 researchers from around …

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