Spatial distribution of vertical density and microstructure profiles in near-surface firn around Dome Fuji, Antarctica
Abstract < 30 mm w.e. yr- 1 ≤ 0.02 m over the top 10 m of the cores. The main findings are (i) a lack of significant density increase in the top ∼ 4 m, (ii) lower mean density near the dome summit (∼ 330 kg m- 3 ∼ 355 kg m- 3 ∼ 3 m, (iv) more pronounced vertical elongation at sites and periods with lower accumulation rates than those with higher accumulation rates, (v) a rapid decrease in SSA in the top ∼ 3 m, and (vi) lower SSA at lower-accumulation sites, but this latter trend is less pronounced than that of microstructural anisotropy. These observations can be explained by a combination of the initial physical properties on the surface set by wind conditions and the metamorphism driven by water vapor transport through the firn column under a strong vertical temperature gradient (temperature gradient metamorphism, TGM). The magnitude of TGM depends on the duration of firn layers under the temperature gradient, determined by the accumulation rate; longer exposure causes a more vertically elongated microstructure and lower SSA. Overall, we highlight the significant spatial variability in the near-surface physical properties over the scale of ∼ 100 km around Dome Fuji. These findings will help us better understand the densification over the whole firn column and the gas-trapping process in deep firn and possible difference in them between existing deep ice cores and the upcoming “Oldest-Ice” cores collected tens of kilometers apart.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Spatial distribution of vertical density and microstructure profiles in near-surface firn around Dome Fuji, Antarctica ; volume:18 ; number:1 ; year:2024 ; pages:425-449 ; extent:25
The Cryosphere ; 18, Heft 1 (2024), 425-449 (gesamt 25)
- Creator
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Inoue, Ryo
Fujita, Shuji
Kawamura, Kenji
Oyabu, Ikumi
Nakazawa, Fumio
Motoyama, Hideaki
Aoki, Teruo
- DOI
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10.5194/tc-18-425-2024
- URN
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urn:nbn:de:101:1-2024020103171981547831
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:27 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Inoue, Ryo
- Fujita, Shuji
- Kawamura, Kenji
- Oyabu, Ikumi
- Nakazawa, Fumio
- Motoyama, Hideaki
- Aoki, Teruo
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Comparing firn temperature profile retrieval based on the firn densification model and microwave data over the Antarctica
Precipitation regime and stable isotopes at Dome Fuji, East Antarctica
The Second Deep Ice Coring Project at Dome Fuji, Antarctica
Variability in dry Antarctic firn : investigations on spatially distributed snow and firn samples from Dronning Maud Land, Antarctica
Variability in dry Antarctic firn : Investigations on spatially distributed snow and firn samples from Dronning Maud Land, Antarctica
Physics-based SNOWPACK model improves representation of near-surface Antarctic snow and firn density
Understanding the drivers of near-surface winds in Adélie Land, East Antarctica
Microstructure-based simulations of the viscous densification of snow and firn
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica
Inland migration of near-surface crevasses in the Amundsen Sea Sector, West Antarctica
Mount Fuji : Gipfel des Fuji
Evolution of layered density and microstructure in near‐surface firn around Dome Fuji, Antarctica
Comparing firn temperature profile retrieval based on the firn densification model and microwave data over the Antarctica
Precipitation regime and stable isotopes at Dome Fuji, East Antarctica
The Second Deep Ice Coring Project at Dome Fuji, Antarctica
Variability in dry Antarctic firn : investigations on spatially distributed snow and firn samples from Dronning Maud Land, Antarctica
Variability in dry Antarctic firn : Investigations on spatially distributed snow and firn samples from Dronning Maud Land, Antarctica
Physics-based SNOWPACK model improves representation of near-surface Antarctic snow and firn density
Understanding the drivers of near-surface winds in Adélie Land, East Antarctica
Microstructure-based simulations of the viscous densification of snow and firn
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica
Inland migration of near-surface crevasses in the Amundsen Sea Sector, West Antarctica