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  • 151. Andersson, E.
    et al.
    Johnsson, U.
    Fjällturismen i norra Lapplandsfjällen under sommaren 1996.1997Rapport (Övrigt vetenskapligt)
  • 152. Andersson, G.
    De stora norrländska sjöarnas ytinnehåll.1901Ingår i: Ymer 21: 106-108, Vol. 21, s. 106-108Artikel i tidskrift (Övrigt vetenskapligt)
  • 153. Andersson, G.
    Den norrländska florans geografiska fördelning och invandringshistoria med särskild hänsyn till dess sydskandinaviska arter.: Norrländskt Handbibliotek 51912Bok (Övrig (populärvetenskap, debatt, mm))
  • 154. Andersson, G.
    Tjälens djuplek i det nordligaste Sverige.1903Ingår i: Ymer, Vol. 23, s. 485-486Artikel i tidskrift (Övrigt vetenskapligt)
  • 155. Andersson, G.
    et al.
    Birger, S.
    Die geographische Verteilung und die Einwanderungsgeschichte der nordskandinavischen Flora.1914Ingår i: Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie, Vol. 51, s. 501-593Artikel i tidskrift (Övrigt vetenskapligt)
  • 156. Andersson, I.H.
    Nectar feeding behaviour and the significance of sugar meals in mosquitoes (Diptera: Culicidae).1991Rapport (Övrigt vetenskapligt)
  • 157. Andersson, J.
    et al.
    Weisner, S.
    Jämförande studier av populationsdynamiken hos två Carex bigelowii populationer.1980Studentuppsats (Examensarbete)
  • 158. Andersson, L.
    Björklidens vinterturister. En studie av turisterna och deras vanor.1996Rapport (Övrigt vetenskapligt)
  • 159. Andersson, M.
    Fjällämmeln - en flyttande gnagare?1977Rapport (Övrigt vetenskapligt)
  • 160. Andersson, M.
    Fjällämmeln - en nordisk särling1977Ingår i: Fauna och flora, Vol. 72, nr 4, s. 182-188Artikel i tidskrift (Övrigt vetenskapligt)
  • 161. Andersson, M.
    Influence of predation on rodent populations1977Ingår i: Oikos, Vol. 29, s. 591-597Artikel i tidskrift (Övrigt vetenskapligt)
  • 162. Andersson, M.
    Lemmus lemmus: A possible case of aposematic coloration and behavior1976Ingår i: Journal of Mammalogy, Vol. 57, nr 3, s. 461-469Artikel i tidskrift (Övrigt vetenskapligt)
  • 163. Andersson, M. E.
    et al.
    Sommar, J.
    Gardfeldt, K.
    Lindqvist, O.
    Enhanced concentrations of dissolved gaseous mercury in the surface waters of the Arctic Ocean2008Ingår i: Marine Chemistry, ISSN 0304-4203, E-ISSN 1872-7581, Vol. 110, nr 3-4, s. 190-194Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    During an almost three months long expedition in the Arctic Ocean, the Beringia 2005, dissolved gaseous mercury (DGM) was measured continuously in the surface water. The DGM concentration was measured using an equilibrium system, i.e. the DGM in the water phase equilibrated with a stream of gas and the gas was thereafter analysed with respect to its mercury content. The DGM concentrations were calculated using the following equation, DGM = Hg-eq / k(H’) where Hg-eq is the equilibrated concentration of elemental mercury in the gas phase and k(H’) is the dimensionless Henry’s law constant at desired temperature and salinity. During the expedition several features were observed. For example, enhanced DGM concentration was measured underneath the ice which may indicate that the sea ice acted as a barrier for evasion of mercury from the Arctic Ocean to the atmosphere. Furthermore, elevated DGM concentrations were observed in water that might have originated from river discharge. The gas-exchange of mercury between the ocean and the atmosphere was calculated in the open water and both deposition and evasion were observed. The measurements showed significantly enhanced DGM concentrations, compared to more southern latitudes. (C) 2008 Elsevier B.V. All rights reserved.

  • 164. Andersson, M.
    et al.
    Jonasson, S.
    Rodent cycles in relation to food resources on an alpine heath1986Ingår i: Oikos, Vol. 46, nr 1, s. 93-106Artikel i tidskrift (Övrigt vetenskapligt)
  • 165. Andersson, Malte
    Aposematism and crypsis in a rodent: antipredator defence of the Norwegian lemming2015Ingår i: Behavioral Ecology and Sociobiology, ISSN 0340-5443, E-ISSN 1432-0762, Vol. 69, nr 4, s. 571-581Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aposematism is unusual in herbivorous mammals, and exceptions help clarify its ecology and evolution. The Norwegian lemming differs from other rodents in colouration and behaviour. One hypothesis is that its black, yellow and white colours, loud calls and ferocious defence reduce predation by conspicuous aposematism. Another hypothesis is that the colouration is cryptic. These alternatives are tested in a detectability experiment comparing lemmings and sympatric grey-sided voles. All 18 observers detected a higher proportion of the lemmings, corroborating conspicuousness. Unlike smaller rodents, Norwegian lemmings often call from a distance at predators. The aposematism hypothesis predicts that cryptically coloured Alaskan brown lemmings will not call. In the field, Norwegian lemmings gave antipredator calls at a human observer in 36 of 110 encounters, but brown lemmings did so in only 1 of 39 cases. Most Norwegian lemmings called if surprised within a few metres but froze or fled silently farther away, relying on crypsis against distant predators. Small juveniles called as often as adults, a possible case of auto-mimicry. In an earlier experiment, Norwegian lemmings, in contrast with grey-sided voles, aggressively resisted attacks by a major avian predator of rodents. The tests corroborate the hypotheses that (1) distinctive, contrast-rich colouration, antipredator calls and threat postures of the Norwegian lemming form a multimodal suit of aposematic traits, warning predators that this is a more dangerous prey than the smaller sympatric voles, and (2) discriminability from undefended species is an important adaptive reason for conspicuous distinctness of many aposematic signals.

  • 166. Andersson, Maria E.
    et al.
    Gardfeldt, Katarina
    Wangberg, Ingvar
    A description of an automatic continuous equilibrium system for the measurement of dissolved gaseous mercury2008Ingår i: Analytical and Bioanalytical Chemistry, ISSN 1618-2642, E-ISSN 1618-2650, Vol. 391, nr 6, s. 2277-2282Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A novel continuous equilibrium system with high time resolution, i.e. every ten minutes, was developed to sample and determine dissolved gaseous mercury (DGM) in natural surface waters. The system is based on the opposite flow principle, can be connected to a ship’s bow water system, and can be applied under most ambient conditions, such as high wind speeds and onboard a moving ship. For the DGM determination the system uses the measured equilibrium concentration of mercury established between the aqueous and gaseous phases, i.e. DGM = Hg(extr) / k (H’), where Hg(extr) is the measured mercury concentration in the outgoing gas phase and k(H’) is the dimensionless Henry’s Law constant at the desired temperature and salinity. The efficiency of the system was investigated via theoretical calculations and by comparing the continuous equilibrium system with discrete samples. The measurements obtained by the continuous equilibrium system agree within 13% at the 95% confidence level with the measurements of discrete samples obtained by the traditional technique. The theoretical calculations estimated that the continuous equilibrium system described here had an efficiency of 99% for determining the DGM concentration.

  • 167. Andersson, Maria E.
    et al.
    Sommar, Jonas
    Gardfeldt, Katarina
    Jutterstrom, Sara
    Air-sea exchange of volatile mercury in the North Atlantic Ocean2011Ingår i: Marine Chemistry, ISSN 0304-4203, E-ISSN 1872-7581, Vol. 125, nr 1-4, s. 1-7Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Part of the Beringia 2005 expedition covered the North Atlantic Ocean. During this passage, dissolved gaseous mercury (DGHg) in seawater and atmospheric concentrations of total gaseous mercury (TGHg), carbon monoxide (CO), and ozone (O-3) were measured continuously at high resolution. In addition, meteorological parameters such as wind speed and water temperature were measured continuously by the ship’s meteorological instrumentation. The DGHg concentration was measured using a continuous equilibrium system where the elemental mercury in the sea water was equilibrated with a stream of gas. The DGHg concentration was calculated using DGHg=Hg-eq/k(H), where Hg-eq is the concentration of elemental mercury in the equilibrated air and k(H), is the dimensionless Henry’s law constant. The degree of saturation was determined directly from the measurements S = Hg-eq/TGHg. The water sampled had an average DGHg concentration of 58 +/- 10 fM and the average TGHg concentration was determined to 1.7 +/- 0.1 ng m(-3). The water sampled was under- and super-saturated with respect to elemental mercury covering a large range of saturation of 70 to 230% resulting in an average degree of saturation of 150 +/- 30%. Therefore, both evasion and deposition of elemental mercury were observed in the sampled water. In the light of the average flux, 2.1 +/- 1.8 pmol m(-2) h(-1), it is concluded that mostly evasion occured during the sampling period. (C) 2011 Elsevier B.V. All rights reserved.

  • 168. Andersson, N.Å.
    Abisko naturvetenskapliga station.1970Ingår i: Fältbiologen, Vol. 23, nr 2, s. 8-9Artikel i tidskrift (Övrigt vetenskapligt)
  • 169. Andersson, N.Å.
    Andrakull hos rödstjärt (Phoenicurus phoenicurus).1987Ingår i: Fåglar i Norrbotten, Vol. 6, nr 4, s. 15-Artikel i tidskrift (Övrigt vetenskapligt)
  • 170. Andersson, N.Å.
    Forskning vid Abisko Naturvetenskapliga Station.1996Ingår i: Fåglar i Norrbotten, Vol. 15, nr 2, s. 50-51Artikel i tidskrift (Övrigt vetenskapligt)
  • 171. Andersson, N.Å.
    Fågelfaunan i Torneträskområdet - främst Abiskotrakten.1993Ingår i: Fåglar i Norrbotten, Vol. 12, nr 1, s. 3-17Artikel i tidskrift (Övrigt vetenskapligt)
  • 172. Andersson, N.Å.
    Fåglars flyttning fascinerar flertalet.1992Ingår i: Fåglar i Norrbotten, Vol. 11, nr 2, s. 35-41Artikel i tidskrift (Övrigt vetenskapligt)
  • 173. Andersson, N.Å.
    Nationalparksexploatering - tankar och grämelser med utgångspunkt från vad jag nödgas se i Abisko.1970Ingår i: Fältbiologen, Vol. 23, nr 2, s. 3-7Artikel i tidskrift (Övrigt vetenskapligt)
  • 174. Andersson, N.Å.
    Projektering pågår av väg Kiruna-Torneträsk-Narvik.1973Ingår i: Sveriges Natur, Vol. 64, nr 4, s. 199-201Artikel i tidskrift (Övrigt vetenskapligt)
  • 175. Andersson, N.Å.
    Stentrast i Abisko.1989Ingår i: Fåglar i Norrbotten, Vol. 8, nr 3, s. 71-74Artikel i tidskrift (Övrigt vetenskapligt)
  • 176. Andersson, N.Å.
    Upplevelser i nationalpark. Rapport i ord och bild.1976Ingår i: Sveriges Natur, Vol. 67, nr 4, s. 154-155Artikel i tidskrift (Övrigt vetenskapligt)
  • 177. Andersson, N.Å.
    Vad säger pollenregnet om skogen?.1980Ingår i: Fauna och flora, Vol. 75, nr 1, s. 12-18Artikel i tidskrift (Övrigt vetenskapligt)
  • 178. Andersson, N.Å.
    Återfynd av två starar Sturnus vulgaris ringmärkta i Abisko.1996Ingår i: Ornis Svecica, Vol. 6, s. 121-122Artikel i tidskrift (Övrigt vetenskapligt)
  • 179. Andersson, N.Å.
    et al.
    Callaghan, T.V.
    Karlsson, P.S.
    The Abisko Scientific Research Station.1996Ingår i: Ecological Bulletins, Vol. 45, s. 11-14Artikel i tidskrift (Övrigt vetenskapligt)
  • 180. Andersson, N.Å. (Ed.)
    Svenska naturskyddsföreningen. Riksstämman 1983 i Kiruna. Exkursion 1 Nordkalottvägen Kiruna - Riksgränsen den 13 - 14 juni 1983.1983Rapport (Övrigt vetenskapligt)
  • 181. Andersson, N.Å.
    et al.
    Müller, K.
    Der Tagesrhythmus des Stares Sturnus vulgaris und anderer Singvögel in Abisko, Nordschweden.1978Ingår i: Ornis Scand, Vol. 9, nr 1, s. 40-45Artikel i tidskrift (Övrigt vetenskapligt)
  • 182. Andersson, N.Å.
    et al.
    Persson, B.
    Något om fjällugglans Nyctea scandiaca näringsval i Lappland.1971Ingår i: Vår Fågelvärld, Vol. 30, s. 227-23lArtikel i tidskrift (Övrigt vetenskapligt)
  • 183. Andersson, Per S.
    et al.
    Porcelli, Don
    Frank, Martin
    Bjork, Goran
    Dahlqvist, Ralf
    Gustafsson, Orjan
    Neodymium isotopes in seawater from the Barents Sea and Fram Strait Arctic-Atlantic gateways2008Ingår i: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 72, nr 12, s. 2854-2867Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The neodymium concentration, C-Nd, and isotopic composition, epsilon(Nd), in seawater have been determined in the water column at five sites in the Barents Sea-Fram Strait area where most of the water exchange between the Arctic Ocean and the North Atlantic takes place. In the main Arctic Ocean inflow branch across the Barents Sea the concentration and isotopic composition (C-Nd = 15.5 pmol/kg and epsilon(Nd) = -10.8) are similar to those reported for the northeastern Nordic Seas, which is consistent with this region being a source area for the Arctic inflow. Due to the addition of Nd from Svalbard shelf sediments, the C-Nd in the surface waters above 150 m, in the Fram Strait inflow branch is higher by a factor of 2 and the epsilon(Nd) is shifted to lower values (-11.8). In the stratified Nansen Basin, where cold low salinity water overlies warmer Atlantic water the C-Nd and epsilon(Nd) do not vary with the vertical temperature-salinity structure but are essentially constant and similar to those of the Atlantic inflow throughout the entire water column, down to 3700 m depth, which indicates that the Nd is to a large extent of Atlantic origin. Compared to the Atlantic inflow water, the Nd in the major Arctic Ocean outflow, the Fram Strait, show higher C-Nd in the surface waters above 150 m, and a higher epsilon(Nd) (-9.8) throughout the entire water column down to 1300 m depth. Sources for the more radiogenic Nd isotopic composition in deep water of the Fram Strait outflow most likely involve boundary exchange with sediments on the shelf and slope as the water passes along the Canadian archipelago. River water is a possible source in the surface water but it also seems likely that Pacific water Nd, modified by interactions on the shelf, is an important component in the Fram Strait surface outflow. Changes in the relative proportions of inflow of river water and flow of Pacific water through the Arctic Ocean could thus influence the isotopic composition of Nd in the North Atlantic. (c) 2008 Elsevier Ltd. All rights reserved.

  • 184.
    Andersson, S.
    et al.
    Inst Geovetenskap, Geografi..
    Karinen, A.
    Öberg, S.
    Studie av sjösediment i Abisko-området, norra Sverige.2001Studentuppsats (Examensarbete)
  • 185. Andersén, C.
    et al.
    Renström, S.
    Områdesbeskrivning kring Torneträsk hållplats.1978Rapport (Övrigt vetenskapligt)
  • 186. Andrassy, I.
    Nematoden aus der Uferregion des Vättern- und Torneträsk-Sees (Schweden)1967Ingår i: Opuscula Zoologica Budapest, Vol. 7, nr 2, s. 3-36Artikel i tidskrift (Övrigt vetenskapligt)
  • 187. Andresen, A.
    et al.
    Rykkelid, E.
    Basement shortening across the Caledonides in the Torneträsk-Ofoten area.1989Ingår i: GFF, Vol. 111, s. 381-383Artikel i tidskrift (Övrigt vetenskapligt)
  • 188. Andresen, Louise C.
    et al.
    Jonasson, Sven
    Ström, Lena
    Michelsen, Anders
    Uptake of pulse injected nitrogen by soil microbes and mycorrhizal and non-mycorrhizal plants in a species-diverse subarctic heath ecosystem2008Ingår i: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 313, nr 1, s. 283-295Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    15N labeled ammonium, glycine or glutamic acid was injected into subarctic heath soil in situ, with the purpose of investigating how the nitrogen added in these pulses was subsequently utilized and cycled in the ecosystem. We analyzed the acquisition of 15N label in mycorrhizal and non-mycorrhizal plants and in soil microorganisms, in order to reveal probable differences in acquisition patterns between the two functional plant types and between plants and soil microorganisms. Three weeks after the label addition, with the 15N-forms added with same amount of nitrogen per square meter, we analyzed the 15N-enrichment in total soil, in soil K2SO4 (0.5 M) extracts and in the microbial biomass after vacuum-incubation of soil in chloroform and subsequent K2SO4 extraction. Furthermore the 15N-enrichment was analyzed in current years leaves of the dominant plant species sampled three, five and 21 days after label addition. The soil microorganisms had very high 15N recovery from all the N sources compared to plants. Microorganisms incorporated most 15N from the glutamic acid source, intermediate amounts of 15N from the glycine source and least 15N from the NH4+ source. In contrast to microorganisms, all ten investigated plant species generally acquired more 15N label from the NH4+ source than from the amino acid sources. Non-mycorrhizal plant species showed higher concentration of 15N label than mycorrhizal plant species 3 days after labeling, while 21 days after labeling their acquisition of 15N label from amino acid injection was lower than, and the acquisition of 15N label from NH4 injection was similar to that of the mycorrhizal species. We conclude that the soil microorganisms were more efficient than plants in acquiring pulses of nutrients which, under natural conditions, occur after e.g. freeze–thaw and dry–rewet events, although of smaller size. It also appears that the mycorrhizal plants in the short term may be less efficient than non-mycorrhizal plants in nitrogen acquisition, but in a longer term show larger nitrogen acquisition than non-mycorrhizal plants. However, the differences in 15N uptake patterns may also be due to differences in leaf longevity and woodiness between plant functional groups.

  • 189. Andrews, Christopher
    et al.
    Dick, Jan
    Jonasson, Christer
    Callaghan, Terry
    Assessment of Biological and Environmental Phenology at a Landscape Level from 30 Years of Fixed-Date Repeat Photography in Northern Sweden2011Ingår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 40, nr 6, s. 600-609Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A 30-year series (1978–2007) of photographic records were analysed to determine changes in lake ice cover, local (low elevation) and montane (high elevation) snow cover and phenological stages of mountain birch (Betula pubescens ssp. czerepanovii) at the Abisko Scientific Research Station, Sweden. In most cases, the photographic-derived data showed no significant difference in phenophase score from manually observed field records from the same period, demonstrating the accuracy and potential of using weekly repeat photography as a quicker, cheaper and more adaptable tool to remotely study phenology in both biological and physical systems. Overall, increases in ambient temperatures coupled with decreases in winter ice and snow cover, and earlier occurrence of birch foliage, signal a reduction in the length of winter, a shift towards earlier springs and an increase in the length of available growing season in the Swedish sub-arctic.

  • 190. André, C.
    et al.
    Ottlé, C.
    Royer, A.
    Maignan, F.
    Land surface temperature retrieval over circumpolar Arctic using SSM/I–SSMIS and MODIS data2015Ingår i: Remote Sensing of Environment, ISSN 0034-4257, E-ISSN 1879-0704, Vol. 162, s. 1-10Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Abstract Remote sensing instruments are key players to map land surface temperature (LST) at large temporal and spatial scales. In this paper, we present how we combine passive microwave and thermal infrared data to estimate LST during summer snow-free periods over northern high latitudes. The methodology is based on the SSM/I–SSMIS 37 GHz measurements at both vertical and horizontal polarizations on a 25 km × 25 km grid size. LST is retrieved from brightness temperatures introducing an empirical linear relationship between emissivities at both polarizations as described in Royer and Poirier (2010). This relationship is calibrated at pixel scale, using cloud-free independent LST data from MODIS instruments. The SSM/I–SSMIS and MODIS data are synchronized by fitting a diurnal cycle model built on skin temperature reanalysis provided by the European Centre for Medium-Range Weather Forecasts (ECMWF). The resulting temperature dataset is provided at 25 km scale and at an hourly time step during the ten-year analysis period (2000–2011). This new product was locally evaluated at five experimental sites of the EU-PAGE21 project against air temperature measurements and meteorological model reanalysis, and compared to the MODIS LST product at both local and circumpolar scale. The results giving a mean RMSE of the order of 2.2 K demonstrate the usefulness of the microwave product, which is unaffected by clouds as opposed to thermal infrared products and offers a better resolution compared to model reanalysis. The dataset can be downloaded from the PANGAEA website: http://doi.pangaea.de/10.1594/PANGAEA.833409.

  • 191. André, Marie-Fran\c coise
    From climatic to global change geomorphology: contemporary shifts in periglacial geomorphology2009Ingår i: Geological Society Special Publication, ISSN 0305-8719, E-ISSN 2041-4927, Vol. 320, nr 1, s. 5-28Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Periglacial geomorphology developed in the 1940s–1960s as a branch of climatic geomorphology, focusing first on Quaternary studies and palaeoenvironmental reconstructions, then on current geomorphic activity in cold regions. The ‘periglacial fever’ of the 1960s–1970s was dominated by the ‘freeze–thaw dogma’: periglacial areas were regarded as necessarily submitted to efficient frost-driven processes ruling over the geomorphic activity. Such a view was severely criticized in the 1980s–1990s based both on monitoring studies and on time–space multiscale approaches that pointed to the need to cross the ‘smokescreen of the periglacial scenery’ to search for the real past and present processes responsible for the landform geometry. The role of non-cold-related processes in the making of ‘periglacial’ landcapes was re-evaluated, and the necessity to better take into account the rock properties and the pre-Quaternary history of slope systems was emphasized. Whereas the part of the cold-related processes was being minimized, the interest of genuine periglacial landforms as geoindicators of climate change was growing, providing a new legitimacy to periglacial geomorphology. Polar and Alpine regions are nowadays considered as key observatories of ongoing climate change, and periglacial geomorphologists are involved in the detection, monitoring and prediction of environmental changes. Finally, the evolution of ‘periglacial geomorphology’ over the past six decades is in accordance with the development of the whole geomorphology. Based on the quantitative and technological revolution, it tends to find a balance between the functional and historical approaches.

  • 192. André, M.F.
    Geomorphic evidence for recurrent cold-based ice conditions in Nordic uplands during the Quaternary glaciations (Aurivaara Plateau, North Sweden).2002Ingår i: Norwegian Journal of Geography, Vol. 56, s. 74-79Artikel i tidskrift (Övrigt vetenskapligt)
  • 193. André, M.-F.
    Postglacial Microweathering of Granite Roches Moutonnées in Northern Scandinavia (Riksgränsen area, 68oN).1995Ingår i: Steepland Geomorphology / [ed] Slaymaker, 1995, s. 103-127Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 194. André, M.F.
    Rates of Postglacial rock weathering on glacially scoured outcrops (Abisko-Riksgränsen area, 68oC).2002Ingår i: Geografiska Annaler, Vol. 84A, nr 3-4, s. 139-150Artikel i tidskrift (Övrigt vetenskapligt)
  • 195. Andréasson, Per-Gunnar
    et al.
    Allen, Ann
    Aurell, Oskar
    Boman, Daniel
    Ekestubbe, Jonas
    Goerke, Ute
    Lundgren, Anders
    Nilsson, Patrik
    Sandelin, Stefan
    Seve terranes of the Kebnekaise Mts., Swedish Caledonides, and their amalgamation, accretion and affinity2018Ingår i: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 140, nr 3, s. 264-291Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A major allochthon of the Scandinavian Caledonides, the Seve belt has traditionally been considered to be derived from the rifted margin and continent-ocean transition (COT) of Baltica. However, geochronological results obtained from its inferred northern equivalent, the Kalak Nappe Complex (KNC), have been taken to indicate an exotic affinity of this complex and of also Seve terranes, an interpretation adopted in recent palaeogeographic models. In the Kebnekaise Mts., the COT is represented by the Kebnekaise terrane composed of amphibolitized dykes of gabbro and dolerite of depleted magma source and rare felsic and ultramafic rocks. Coronitic dolerite and gabbro with abundant rutile suggest high pressures before or during amalgamation with the underlying Mårma terrane, composed of quartzofeldspathic gneisses intruded by mafic and granitic rocks, the latter including a previously dated c. 845 Ma-old granite. The granite mingled with mildly alkaline dolerites chemically similar to transitional basalts of continental rifts. Following emplacement at shallow (andalusite stability) crustal levels, the igneous complex and host rocks underwent extensive deformation, metamorphism within the sillimanite-kyanite stability field and local migmatization. The Kebnekaise and Mårma terranes amalgamated in early Ordovician as indicated by the U-Pb age of 487±7 Ma obtained from titanite fabrics of deformed granite in thrust vicinity, and by 40Ar-39Ar results. The pressure increase in both terranes suggests that amalgamation occurred during initial subduction and imbrication. Correlation of the Mårma terrane with the KNC is discussed. Results obtained in this study give no reason to ascribe an exotic affinity to the Seve terranes of the Kebnekaise Mts.

  • 196. Andrén, H., Jonasson, C.
    et al.
    Ottosson, J.
    Deltas in the Abisko area, northern Sweden: the Abiskojokka delta in lake Torneträsk.2002Ingår i: Geografiska Annaler, Vol. 84A, nr 3-4, s. 151-156Artikel i tidskrift (Övrigt vetenskapligt)
  • 197. Andrén, Thomas
    et al.
    Björck, J
    Johnsen, S
    Correlation of Swedish glacial varves with the Greenland (GRIP) oxygen isotope record1999Ingår i: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 14, nr 4, s. 361-371Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A mean varve thickness curve has been constructed for a part of the Swedish varve chronology from the northwestern Baltic proper. The mean varve thickness curve has been correlated with the delta(18)O record from the GRIP ice-core using the Younger Dryas-Preboreal climate shift. This climate shift was defined by pollen analyses. The Scandinavian ice-sheet responded to a warming at the end of the Younger Dryas, ca. 10 995 to 10 700 clay-varve yr BP. Warming is recorded as a sequence of increasing mean varve thickness and ice-rafted debris suggesting intense calving of the ice front. The Younger Dryas-Preboreal climatic shift is dated to ca. 10 650 clay-varve yr BP, about 40 yr after the final drainage of the Baltic Ice Lake. Both the pollen spectra and a drastic increase in varve thickness reflect this climatic shift. A climate deterioration, correlated with the Preboreal oscillation, is dated to ca. 10 440 to 10 320 clay-varve yr BP and coincides with the brackish water phase of the Yoldia Sea stage. The ages of the climatic oscillations at the Younger Dryas-Preboreal transition show an 875 yr discrepancy compared with the GRIP record, suggesting a large error in the Swedish varve chronology in the part younger than ca. 10 300 clay-varve yr BP.

  • 198. Angerbjörn, Anders
    et al.
    Tannerfeldt, Magnus
    Erlinge, Sam
    Predator-prey relationships: arctic foxes and lemmings1999Ingår i: Journal of Animal Ecology, ISSN 0021-8790, E-ISSN 1365-2656, Vol. 68, s. 34-49Artikel i tidskrift (Refereegranskat)
  • 199. Anrick, C.-J.
    Korta promenader och lätta sommarvandringar kring Abisko Turiststation.1957Rapport (Övrigt vetenskapligt)
  • 200. Anrick, C.-J.
    Våra svenska nationalparker.1927Bok (Övrig (populärvetenskap, debatt, mm))
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