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Profil bibliographique

Hanne H. Christiansen

Informations fournies par OpenAlex. Research Africa ne déduit ni nationalité, ni poste, ni coordonnées personnelles.

332Publications signalées
10742Citations signalées
3Affiliations récentes

Les institutions déclarées

Les domaines associés

Climate change and permafrostCryospheric studies and observationsGeology and Paleoclimatology ResearchMethane Hydrates and Related PhenomenaArctic and Antarctic ice dynamics

Les publications récentes

Accès ouvert 2026 article OpenAlex

Long-term monitoring of active layer thickness confirms global permafrost degradation

D. A. Streletskiy, Kelsey E. Nyland, N. I. Shiklomanov, Emma Haggerty et autres

Abstract Active layer increase may contribute to greenhouse gas emissions, ecosystem change, and increased hazards. Here, we show the results of field measurements of active-layer thickness from 156 monitoring sites in Arctic, Antarctic and mountain permafrost regions. Active layer thickness increased significantly …

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0 citations Communications Earth & Environment
Accès ouvert 2026 peer-review OpenAlex

Comment on egusphere-2025-6564

Dotan Rotem, Yishai Weinstein, Yehudit Harlavan, Adi Torfstein et autres

Abstract. While permafrost is considered a permanently frozen soil, it often demonstrates evidence for internal processes, including fluid migration. Here, we present data of the chemical composition, Ra, Th, and Ac isotopes of saline permafrost from three closely-retrieved cores drilled at Adventdalen, …

il, sj (code pays fourni par la source)

0 citations
Accès ouvert 2026 peer-review OpenAlex

Comment on egusphere-2025-6564

Dotan Rotem, Yishai Weinstein, Yehudit Harlavan, Adi Torfstein et autres

Abstract. While permafrost is considered a permanently frozen soil, it often demonstrates evidence for internal processes, including fluid migration. Here, we present data of the chemical composition, Ra, Th, and Ac isotopes of saline permafrost from three closely-retrieved cores drilled at Adventdalen, …

il, sj (code pays fourni par la source)

0 citations
Accès ouvert 2026 peer-review OpenAlex

Comment on egusphere-2025-6564

Dotan Rotem, Yishai Weinstein, Yehudit Harlavan, Adi Torfstein et autres

Abstract. While permafrost is considered a permanently frozen soil, it often demonstrates evidence for internal processes, including fluid migration. Here, we present data of the chemical composition, Ra, Th, and Ac isotopes of saline permafrost from three closely-retrieved cores drilled at Adventdalen, …

il, sj (code pays fourni par la source)

0 citations
Accès ouvert 2026 preprint OpenAlex

The history of ground ice formation and intra-permafrost fluid flow as documented by Ra and Th isotopes

Dotan Rotem, Yishai Weinstein, Yehudit Harlavan, Adi Torfstein et autres

Abstract. While permafrost is considered a permanently frozen soil, it often demonstrates evidence for internal processes, including fluid migration. Here, we present data of the chemical composition, Ra, Th, and Ac isotopes of saline permafrost from three closely-retrieved cores drilled at Adventdalen, …

il, sj (code pays fourni par la source)

0 citations
Accès ouvert 2026 conference-abstract OpenAlex

Brine flow in permafrost, time constraints by Ra isotopes

Yishai Weinstein, Dotan Rotem, Yehudit Harlavan, Hanne H. Christiansen

The archipelago of Svalbard, at 76-80oN, is located at the heart of the continuous permafrost zone, which means that all exposed areas (glacier-free) are covered by 100-400m thick permafrost. Permafrost in valleys is often saline due to Early Holocene seawater ingression, followed …

il, sj, dk (code pays fourni par la source)

0 citations
Accès ouvert 2026 article OpenAlex

InSAR sensitivity to active layer ground ice content in Adventdalen, Svalbard

Lotte Wendt, Line Rouyet, Hanne H. Christiansen, Tom Rune Lauknes et autres

Interferometric Synthetic Aperture Radar (InSAR) remote sensing of surface displacement in permafrost environments has the potential to resolve ground ice dynamics and potentially active layer thickness, yet field validation is sparse. Here we present a comparison between in-situ ground ice contents and …

no, sj (code pays fourni par la source)

1 citation ˜The œcryosphere
2026 article OpenAlex

Ground Ice Distribution, Cryostratigraphy and Sedimentation in Longyeardalen Valley, Svalbard

Knut Ivar Lindland Tveit, Hanne H. Christiansen

ABSTRACT Ground ice, cryostratigraphical and sediment analyses have been done on samples from 16 boreholes covering the different landforms in the lower part of the valley Longyeardalen, where the largest settlement in Svalbard, Longyearbyen, is located. This allows the production of the …

no, dk (code pays fourni par la source)

1 citation Permafrost and Periglacial Processes
Accès ouvert 2026 dataset OpenAlex

Permafrost-related hazard, vulnerability and risk estimates for cultural heritage and modern buildings in Svalbard

Ionuţ Cristi Nicu, Line Rouyet, Lena Rubensdotter, Anatoly Sinitsyn et autres

The data package includes all intermediate and final products used to produce permafrost-related hazard estimates in Svalbard and to combine the findings with vulnerability indicators for cultural heritage and modern buildings to provide a risk estimate in and around Longyearbyen (LYB) and …

no, sj, dk (code pays fourni par la source)

0 citations Zenodo (CERN European Organization for Nuclear Research)
Accès ouvert 2026 dataset OpenAlex

Permafrost-related hazard, vulnerability and risk estimates for cultural heritage and modern buildings in Svalbard

Ionuţ Cristi Nicu, Line Rouyet, Lena Rubensdotter, Anatoly Sinitsyn et autres

The data package includes all intermediate and final products used to produce permafrost-related hazard estimates in Svalbard and to combine the findings with vulnerability indicators for cultural heritage and modern buildings to provide a risk estimate in and around Longyearbyen (LYB) and …

no, sj, dk (code pays fourni par la source)

0 citations Zenodo (CERN European Organization for Nuclear Research)
Accès ouvert 2025 article OpenAlex

The urgency to adopt the One Health framework for pollution and pandemic management in the Arctic: Svalbard as a case

Anastasia Emelyanova, Arja Rautio, Mario Acquarone, Nicoletta Ademollo et autres

The policy brief includes recommendations for Arctic and global policy-makers focused on the implementation of the One Health approach, and provides an example of Svalbard as a case study for facilitating a One Health framework. We urge policy-makers to adopt the One …

fi, no, sj, gb, dk (code pays fourni par la source)

0 citations Zenodo (CERN European Organization for Nuclear Research)
Accès ouvert 2025 article OpenAlex

The urgency to adopt the One Health framework for pollution and pandemic management in the Arctic: Svalbard as a case

Anastasia Emelyanova, Arja Rautio, Mario Acquarone, Nicoletta Ademollo et autres

The policy brief includes recommendations for Arctic and global policy-makers focused on the implementation of the One Health approach, and provides an example of Svalbard as a case study for facilitating a One Health framework. We urge policy-makers to adopt the One …

fi, no, sj, gb, dk (code pays fourni par la source)

0 citations Zenodo (CERN European Organization for Nuclear Research)

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