Category: Publikasjoner


Distinguished Leadership Award for Internationals – Haakon Fossen

Foto: Private

University of Minnestoa have rewardet Haakon Fossen for 2019 – Distinguished Leadership Award for Internationals.

He has made significant contributions to topics that have fueled debate in earth sciences over the last several decades, including the mechanisms and consequences of oblique motion of tectonic plates and the collapse of mountain belts when extension follows contraction. In addition, he has provided leadership in the study of important structures that control porosity and permeability in sedimentary basins, with applications in groundwater, oil migration, and the sequestration of carbon dioxide. Read more from global.umn.edu.

Congratulations Haakon! 🙂

New paper in nature geoscience

New paper in nature geoscience with the name: Jurassic shift from abiotic to biotic control on marine ecological success.
Kilian Eichenseer, Uwe Balthasar, Christopher W. Smart, Julian Stander, Kristian A. Haaga & Wolfgang Kiessling
Nature Geoscience, volume 12, pages 638–642 (2019) read the article here. Gratulerer!

Ny artikkel i Elsevier – Quaternary Science Reviews

Reconstruction of the deglaciation of the Bergen District with decadal precision

In a recent paper (Mangerud et al 2019) we have been able to date the ice-margin retreat in parts of western Norway with an almost decadal resolution by correlating well dated sea levels with ice-margin deposits. On the attached map we show an example close to Bergen.

Reference: Mangerud, J., Hughes, A.L.C., Sæle, T.H., Svendsen, J.I., 2019. Ice-flow patterns and precise timing of ice sheet retreat across a dissected fjord landscape in western Norway. Quaternary Science Reviews 214, 139-163

The article can, due to the agreement between Norway and Elsevier, be freely downloaded from: https://www.sciencedirect.com/science/article/pii/S0277379119301015

Vi gratulerer!! 🙂

8 nye artikler i Boreas – Geologiske arkiver fra dype innsjøer i de Polare Uralfjellene kaster nytt lys over istidsutviklingen i Russisk Arktis

Geologists investigating a long sediment core from the Polar Ural Mountains in Russia. Jan Mangerud (left), Haflidi Haflidason, John Inge Svendsen, Carl Regnell and Reidun Eldegård. Photo: Eva Bjørseth

Som del av forskningsprosjektet CHASE (Climate History along the Arctic Seaboard of Eurasia) holder vi på med å utforske miljø- og klimaendringene gjennom istider og mellomistider i Russisk Arktis. Vi har i den forbindelse hentet opp borekjerner fra innsjøer inne i de Polare Uralfjellene og vi har studert glasiasjonshistoren i omkringliggende områder. Noen av resultatene fra dette forskningsarbeidet ble nylig publisert i tidsskriftet Boreas, i et spesialhefte som omhandler arktiske innsjøer. Seismiske profiler profiler viser at fjellgrunnen under den dypeste sjøen ligger 110 m under dagens havoverflate og at bassenget er fyllt opp med 160 m med silt og leire. Vår tolkning av sediment-stratigrafien, som dels består av årslag (såkalte varv), er at denne tykke sedimentpakken er avsatt gjennom de siste 50-60,000 år og at det her rådet isfrie forhold under siste istidsglobale ismaksimum da hele Skandinavia var dekket av et mektig isdekke som nådde helt sør til Tyskland. Vi har altså fått et vindu inn i en periode som det har vært vanskelig å få innsikt i på grunn av manglende geologiske arkiver med så høy tidsoppløsning.  Undersøkelsene har så langt gitt oss helt ny innsikt i utviklingshistorien i denne delen av Arktis og viser at den klimatiske utviklingen her har vært nokså annerledes enn i områdene omkring Norskehavet og Nord Atlanteren. Gratulerer til John Inge & Co 🙂

Artikkel nr 1Artikkel nr 2Artikkel nr 3Artikkel nr 4Artikkel nr 5Artikkel nr 6Artikkel nr 7Artikkel nr 8

 

Ny artikkel i Science

 

Kjernematerialet til artikkelen er hentet fra Norsk territorialfarvann rundt Bouvetøya i Sørishavet. Foto: Marius Bratrein, NPI

Som stipendiat var Kikki Helga Flesche Kleiven på tokt i Sørishavet.
20 år senere er materialet de hentet opp analysert med nye metoder,
og resultatene er publisert i Science! Les mer fra vår webside her.

Vi gratulerer! 🙂

New publication to Scientific Reports

We present the longest and highest resolution record of sediment flux and paleoenvironmental changes when a young rift connects to the global oceans. New results from International Ocean Discovery Program (IODP) Expedition 381 in the Corinth Rift show 10s–100s of kyr cyclic variations in basin paleoenvironment as eustatic sea level fluctuated with respect to sills bounding this semi-isolated basin, and reveal substantial corresponding changes in the volume and character of sediment delivered into the rift. The new borehole data suggest that sedimentation rate changes are a function of a decrease and change in type of vegetation cover in glacial periods, resulting in increased erosion and basin sediment flux. Results from GEO – read more from reserach group web page here. Read more from nature.com here. Congratulations!  🙂

New publication in Geology: ‘Tipping the balance: Shifts in sediment production in an active rift setting’

The publication is by Sofia Pechlivanidou, Patience A. Cowie, Guillaume Duclaux, Casey W. Nixon, Robert L. Gawthorpe and Tristan Salles.

In this study we use a field-calibrated numerical model to explore the controls on landscape evolution across the Corinth rift, central Greece. We show that flexural tilting plays a key role in controlling the syn-rift sediment flux and, in a counterintuitive way, modifies the relationship between topographic relief and catchment-averaged erosion rates. Our results provide a new perspective on the origin and timing of sediment starvation relative to structural development in rifts.

Here is the link of our new publication in Geology. Congratulations 🙂

New publication has been rewarded by the 2018 choice of the “Basin Research” Journal’s Editor

Phd student Anneleen Geurts, supervised by Patience Cowie, Rob Gawthorpe and Ritske Huismans, has been rewarded for her article “Drainage integration and sediment dispersal in active continental rifts: A numerical modelling study of the central Italian Apennines” by the 2018 choice of the “Basin Research” journal’s Editor (https://onlinelibrary.wiley.com/page/journal/13652117/homepage/EditorsChoice.html). Written by Rebecca Bell, one of the journal’s Editors:

“The paper by Geurts and colleagues is commended on both scientific merit and presentation. The motivating question is impactful and clearly stated: What drives drainage integration in continental extensional systems? From there, the paper follows a very logical and impressive progression that tests also-clearly stated hypotheses. The methods and results show elegant integration of modeling and field observations. The significance of these results clearly extends beyond the Apennine study area, with global implications, as demonstrated in the discussion and conclusions. I have already tagged several of the figures for use in my basin analysis class this spring.”

Online version: https://onlinelibrary.wiley.com/doi/full/10.1111/bre.12289    Congratulations 🙂

 

 

Register your publications in the Cristin database by 31st January!

The budget of our department is partly dependent on the publications that our scientific staff are authors and coauthors of. We therefore ask everybody to kindly register all their publications that have appeared in 2018 in the Cristin Database: after logging in, please choose “Research results” and then “Register result”. Some publications are automatically gathered from various journals, so please search for your publications via “Search in results” and register only the missing ones. Also, you need only to register the publications on which your affiliation is University of Bergen.

Please try to complete this by January 31st at the latest. This is very important, not only for the budget, but also for the visibility of our research production, as more and more official information is from now on based on what is registered in the national Cristin Database. The research groups will be rewarded according to their registered publication points.

Ny publikasjon: Reconstructing ice‐flow fields from streamlined subglacial bedforms: A kriging approach

Abstract
The orientation of several landforms, e.g. drumlins, flutes, crag‐and‐tails, and mega‐scale glacial lineations, records the direction of the overlying ice flow that created them. Populations of such features are used routinely to infer former ice‐flow patterns, which serve as the building blocks of reconstructions of palaeo ice‐sheet evolution. Currently, the conceptualisation of flow patterns from these flow‐direction records is done manually and qualitatively, so the extractable glaciological information is limited. We describe a kriging method (with Matlab code implementation) that calculates continuous fields of ice‐flow direction, convergence, and curvature from the flow‐direction records, and which yields quantitative results with uncertainty estimates. We test the method by application to the subglacial bedforms of the Tweed Valley Basin, UK. The results quantify the convergent flow pattern of the Tweed Palaeo‐Ice Stream in detail and pinpoint its former lateral shear margins and where ice flowed around basal bumps. Ice‐flow parameters retrieved by this method can enrich ice‐sheet reconstructions and investigations of subglacial till processes and bedform genesis. © 2018 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd. Read more here. Congratulations Anna 🙂

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