Haflidi Haflidason

University of Bergen

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Co-Authors

Hans Petter Sejrup

Advisory Board Company (United States)

Berit Oline Hjelstuen

University of Bergen

Atlé Nygård

Equinor (Norway)

Jo Brendryen

University of Bergen

Petter Bryn

Norsk Hydro (Norway)

H. P. Sejrup

University of Bergen

Maarten Vanneste

Norwegian Geotechnical Institute

Jan Mangerud

University of Bergen

Carl Fredrik Forsberg

Norwegian Geotechnical Institute

John Inge Svendsen

University of Bergen

Cooperative Institutions

University of Bergen

131

UiT The Arctic University of Norway

University of Arizona

Bjerknes Centre for Climate Research

University of Oslo

Norwegian Geological Survey

Institut de l'Information Scientifique et Technique

Centre National de la Recherche Scientifique

Norwegian Geotechnical Institute

University of Bremen

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A Holocene North Atlantic SST record and regional climate variability

Quaternary Science Reviews (2011)

Hans Petter Sejrup Haflidi Haflidason John T. Andrews

Ice core

Paleoclimatology

Proxy (statistics)

Temperature record

10.1016/j.quascirev.2011.07.025

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Citations (42)

Lake Torfadalsvatn: a high resolution record of the North Atlantic ash zone I and the last glacial‐interglacial environmental changes in Iceland

Boreas (1992)

Svante Björck Ólafur Inǵólfsson Haflidi Haflidason Margrét Hallsdóttir N. John Anderson

High resolution environmental records with a refined chronology are essential to understand, reconstruct and model the climate dynamics of the last glacial‐interglacial transition. Sediments from Lake Torfadalsvatn in northern Iceland contain at least four primary volcanic tephras that belong to ash zone I in the North Atlantic deep‐sea cores. We chemically define these basaltic/rhyolitic tephras and the high resolution allows us to date them to about 10,800, 10,600, 9300 and 8900 BP. This detailed tephrostratigraphy will act as a refined dating and correlation tool in the North Atlantic region and enable calibration between different absolute chronologies. The pollen stratigraphy of the sediments suggests that by 10,400 14 C years BP plant colonization of coastal north Iceland had begun. The pollen stratigraphy shows a succession of pioneer plants, from open tundra vegetation towards birch‐juniper woodland, which probably also reflects a transition from a cool climate at 10,400 BP to conditions similar to today's sub‐polar oceanic climate around 9200 BP. Diatom data largely concur with the climatic information from pollen, indicating gradually increasing productivity in the lake.

Chronology

Volcanic ash

Polar front

10.1111/j.1502-3885.1992.tb00009.x

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Citations (160)

Table A3) Geochemistry of sediments of the ash zone from base of substage 5e

Torben Fronval Eystein Jansen Haflidi Haflidason Hans Petter Sejrup

Table (database)

Base (topology)

10.1594/pangaea.743286

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Citations (0)

Cenozoic alongslope processes and sedimentation on the NW European Atlantic margin

Marine and Petroleum Geology (2005)

Jan Sverre Laberg Martyn S. Stoker Kristin Dahlgren H. de Haas Haflidi Haflidason

Contourite

Neogene

Trough (economics)

Paleogene

Seafloor Spreading

Continental Margin

10.1016/j.marpetgeo.2005.01.008

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Citations (117)

Contourites and their relevance for mass wasting along the Mid-Norwegian Margin

Marine and Petroleum Geology (2005)

Petter Bryn K. Berg Martyn S. Stoker Haflidi Haflidason Anders Solheim

Contourite

Mass wasting

Slumping

Continental Margin

10.1016/j.marpetgeo.2004.10.012

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Citations (112)

The mid-Norwegian margin gas hydrate province: trace of slope stability and geo-hazard through time

EGUGA (2010)

Nicolás Waldmann Haflidi Haflidason Berit Oline Hjelstuen Hans Petter Sejrup

Norwegian

Clathrate hydrate

Margin (machine learning)

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Citations (0)

Holocene explosive volcanism of the Jan Mayen (island) volcanic province, North-Atlantic

Journal of Volcanology and Geothermal Research (2016)

Eirik Gjerløw Haflidi Haflidason R. B. Pedersen

Stratovolcano

10.1016/j.jvolgeores.2016.04.025

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Citations (27)

Ice sheet dynamics on the Lofoten–Vesterålen shelf, north Norway, from Late MIS-3 to Heinrich Stadial 1

Quaternary Science Reviews (2015)

Jo Brendryen Haflidi Haflidason Leif Rise Shyam Chand Maarten Vanneste

Stadial

10.1016/j.quascirev.2015.03.015

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Citations (10)

Gas Hydrates on the Norway-Barents Sea-Svalbard margin(GANS)

AGUFM (2007)

Haflidi Haflidason Jürgen Mienert Bjørn Kvamme T. F. W. Barth Jochen Knies

Margin (machine learning)

Clathrate hydrate

Source

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Citations (1)

The sulfate-methane transition zone (SMTZ) in passive and active gas hydrate bearing sediments at Nyegga on the Mid-Norwegian margin: a multidisciplinary geological, geobiological and geochemical study

EGUGA (2010)

Haflidi Haflidason Ida Helene Steen Irene Roalkvam W. Hocking Berit Oline Hjelstuen

The widespread methane seepage pockmark area mapped at Nyegga (700-800 m) on the Mid-Norwegian slope is located also close to the edge of the northern flank of the Storegga Slide. This area has a wide range of both relict and active seafloor seeping structures with gas hydrate identified at the seafloor within the most active ones. These pockmarks are commonly ca. 200 m in diameter and are all located within a temperature regime of ca. -0.7oC. The sulfate-methane transition zone (SMTZ) has been identified in shallow cores within the Nyegga pockmarks and in a longer cores in a area outside these pockmarks. The cores selected for analytical studies are a one 30 cm long core retrieved with aid of ROV from a gas-hydrate bearing sediments within pockmark G11 and a 3 m long core retrieved from an undisturbed area close to these pockmarks. We will present results describing the host sediments, physical and geochemical properties both below and above the SMTZ as well as the biogeochemical processes and the associated biological and microbiological community related to a stable temperature regime around the SMTZ boundary in these selected cores.

Clathrate hydrate

Seafloor Spreading

Biogeochemical Cycle

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Citations (0)