A multidisciplinary journal named Quaternary Science Reviews     

BJÖRN E. BERGLUND 《Boreas: An International Journal of Quaternary Research》1983,12(1):16-16

Books reviewed in this article:
Bowen. D. O.(ed.) 1982: Quaternary Science Reviews.  相似文献   

Weathering of surface clasts as an indicator of the relative age of glacial deposits on Jameson Land, East Greenland     

MARIANNE LlLLIESKÖLD  BJÖRN SUNDQVIST 《Boreas: An International Journal of Quaternary Research》1994,23(4):473-478

The relative age of glacial deposits on Jameson Land was investigated by weathering-based techniques. Two related methods, measurement of rind thickness and of Schmidt hammer rebound values. were added to a dating programme of luminescence-, amino acid- and ¹⁴C-analyses. Rind thicknesses differ significantly between areas which represent three glacial phascs, spanning a time interval from late Saale to Late Weichselian. Rebound values are more susceptible to external factors than the rind values but may, if these external factors are known, serve as a complement to the interpretation of rind development.  相似文献   

The deglaciation of Norway 15,000–10,000 B.P.     

BJØRN G. ANDERSEN 《Boreas: An International Journal of Quaternary Research》1979,8(2):79-87

The age and correlation of marginal moraines in Norway is discussed. A tentative location of the ice margin 15,000 B.P. is suggested, as well as a more firmly based location of the 10,000 B.P. ice margin. The results are preliminary and based partly on observations by the field parties of the I.G.C.P. project Quaternary Glaciations in the Northern Hemisphere'.  相似文献   

INFORMATION NOT DATA: FUTURE DEVELOPMENT OF ROAD WEATHER INFORMATION SYSTEMS     

TORBJÖRN GUSTAVSSON  JÖRGEN BOGREN 《Geografiska Annaler: Series A, Physical Geography》2007,89(4):263-271

The Swedish Road Weather Information System is a tool for road winter maintenance giving warnings about risk of slipperiness and severe weather conditions. The system is based on climatological research at the University of Göteborg and was initiated by Professor Sven Lindqvist during the 1970s. Knowledge about micro‐and local climate variations is crucial when it comes to forecasting and giving warnings about different kinds of weather‐related traffic disturbances. The progress of climatological research has made it possible to increase the use of road weather data into different applications. Future development will be focused upon development of the road weather information system towards a user‐friendly maintenance decision support system which will enhance the benefits of the road weather information system.  相似文献   

Holocene humidity fluctuations in Sweden inferred from dendrochronology and peat stratigraphy   总被引：1，自引：0，他引：1  

BJÖRN ERIK GUNNARSON  ERS BORGMARK  STEFAN WASTEGÅRD 《Boreas: An International Journal of Quaternary Research》2003,32(2):347-360

Tree-ring and peat stratigraphy data were examined back to 5000 BC in order to identify and compare humidity changes in Fennoscandia. The temporal variation in distribution of Scots pine ( Pinus sylvestris L.) was used as a measure of past lake-level fluctuations in central Sweden. The chronology, which spans 2893 BC–AD 1998 with minor gaps in AD 887–907 and 1633–1650 BC and with additional floating chronologies back to 4868 BC, was cross-dated and fixed to an absolute timescale using a chronology from Torneträsk, northern Sweden. The peat stratigraphy from the Stömyren peat bog, south-central Sweden, was transformed into humification indices to evaluate humidity changes during the past 8000 years. The peat chronology is established by four tephra datings and eight ¹⁴C datings. Synchronous periods of drier conditions, interpreted from regeneration and the mortality pattern of pine, tree-ring chronology and peat humification, were recognized at c. 4900–4800 BC, 2400–2200 BC, 2100–1800 BC, 1500–1100 BC, AD 50–200, AD 400–600 and AD 1350–1500. Possible wetter periods were encountered at 3600–3400 BC, 3200–2900 BC, 2200–2100 BC, 1700–1500 BC, 1100–900 BC, 100 BC-AD 50, AD 200–400, AD 750–900 and AD 1550–1700. The wet and dry periods revealed by the tree rings and peat stratigraphy data indicate considerable humidity changes in the Holocene.  相似文献   

Holocene palaeoecology and shoreline displacement on the Biskopsmåla Peninsula, southeastern Sweden     

SHI-YONG YU  ELINOR ANDRÉN  LENA BARNEKOW  BJÖRN E. BERGLUND  PER SANDGREN 《Boreas: An International Journal of Quaternary Research》2003,32(4):578-589

High-resolution palaeoecological proxies of pollen, macrofossils and diatoms from an isolation lake provide a long-term record of the Holocene landscape history and shoreline displacement on the Biskopsmåla Peninsula in central Blekinge, SE Sweden. During the Preboreal/Boreal transition, the peninsula was sparsely vegetated by woodlands, along with lateglacial dwarf shrub/steppe communities. The lake basin was isolated from the shallow Yoldia Sea during this time. The regional climate improved from 10 700 cal. BP, evident as progressive expansion of Pinus-dominated mixed forest with deciduous trees. The lake basin was probably connected with the Ancylus Lake during the period 10700–10 100 cal. BP. Subsequently the basin became isolated again, corresponding to the Early Littorina Sea phase. Replacement of freshwater diatoms by those with brackish-water affinity at 8100 cal. BP indicates the initial transgression of the Littorina Sea in this basin. But not until 7500 cal. BP were brackish conditions fully established. Peaks of brackish-marine diatoms and dinoflagellates during 7500–7000 cal. BP indicate increased saltwater inflow to the Baltic Sea in response to global meltwater pulse 3. However, interactive changes in seagrass and stonewort macrofossil concentrations suggest that three minor transgressions during 5900–5300, 5000–4700 and 4400–4000 cal. BP occurred locally, associated with centennial-scale variations in regional wind pattern or coastal storminess. By 3000 cal. BP, the lake basin was finally isolated from the Baltic, and thereafter the landscape on the peninsula became gradually more influenced by human activities.  相似文献   

Regressions and transgressions of the Baltic basin reflected by a new high-resolution deglacial and postglacial lithostratigraphy for Arkona Basin sediments (western Baltic Sea)   总被引：3，自引：0，他引：3  

MATTHIAS MOROS  WOLFRAM LEMKE  ANTOON KUIJPERS  RUDOLF ENDLER  JØRN BO JENSEN  OLE BENNIKE  FRANZ GINGELE 《Boreas: An International Journal of Quaternary Research》2002,31(2):151-162

Seismoacoustic profiles from the Arkona Basin show a late Pleistocene and Holocene succession of several distinct reflectors. The physical, sedimentological, mineralogical and geochemical properties of more than 30 sediment cores were analysed in order to assign these reflectors to specific sedimentary discontinuity layers. Additionally, AMS ¹⁴C data and biostratigraphic information were gathered. Based on this multi‐proxy approach, seven lithostratigraphic units (AI, AII, B to F) were distinguished. These consist of fine‐grained clay, silt and mud, and are separated from each other by thin basin‐wide traceable sandy layers (S_ab‐S_ef). The most sensitive parameter to mark the lithostratigraphic boundaries is the weight percentage of the grain‐size fraction >63μm. In addition, some of the quartz‐grain‐dominated sandy layers cause the strong reflection lines recorded in seismoacoustic profiles. The sandy layers are interpreted to reflect enhanced hydrodynamic energy induced by episodes of basin‐wide water‐level low‐stand conditions. These low stands resulted from water‐level drops that occurred frequently during the Baltic Sea's history and presumably affected the entire Baltic basin. The thick fine‐grained units AI, AII to F, in which coarser material is absent, represent water‐level high‐stands. We conclude that the units AI and AII are Baltic Ice Lake sediments deposited before and after the Billingen‐1 regression, respectively. We assign the most prominent sandy layer S_ab to the final drainage of the Baltic Ice Lake (Billingen‐2), whereas the sandy layers between units B, C., D and E are related to the Yoldia Sea and Ancylus Lake regressions of the Baltic Sea's history. The uppermost fine‐grained unit F with its high organic carbon content contains marine sediments deposited after the Littorina Transgression. The macroscopically well‐visible sediment colour change from reddish/brown‐to‐grey, previously interpreted as a regional stratigraphic boundary, varies from core to core. It has been shown by our new data that this colour change has a diagenetic origin, and thus does not represent a stratigraphic boundary. Previous subdivisions therefore have to be revised.  相似文献   

Quaternary stratigraphy of Norden, a proposal for terminology and classification   总被引：27，自引：0，他引：27  

JAN MANGERUD  SVEND T. ANDERSEN  BJÖRN E. BERGLUND  JOAKIM J. DONNER 《Boreas: An International Journal of Quaternary Research》1974,3(3):109-126

Principles and terminology for classification of the Quaternary are discussed, including lithostratigraphy, biostratigraphy. morphostratigraphy, climatostratigraphy and chronostratigraphy. The main conclusion is a proposal for a common chronostratigraphical classification of the Quaternary in Norden (and partly continental NW Europe). The Quaternary is subdivided into the Pleistocene and the Holocene Series. The Pleistocene is further subdivided into several provisional stages (Weichselian, Eemian, etc.), based on the sequence of glacials/interglacials. but with the boundaries preferably defined by stratotypes. The Late Weichselian and the Flandrian (Holocene) are subdivided into chronozoncs (Bolling, Older Dryas, Allerød, Younger Dryas, Preboreal, Boreal, Atlantic, Subboreal, Subatlantic) with the boundaries dcfined in conventional radiocarbon years.  相似文献   

Past changes in the geomagnetic field caused by glaciations and deglaciations     

ERIC OLAUSSON  BJÖRN SVENONIUS 《Boreas: An International Journal of Quaternary Research》1975,4(1):55-62

Contributions have been made to the theory of the relation between terrestrial magnetism and glaciations. The results are applied to the ice sheets of high-latitude regions. A review of Pleistocene palcomagnetic dating is given.  相似文献   

Melting of a Hydrous Mantle: III. Phase Relations of Garnet Websterite+H2O at High Pressures and Temperatures     

MYSEN  BJ?RN O.; BOETTCHER  A. L. 《Journal of Petrology》1976,17(1):1-14

A garnet websterite nodule from the Honolulu volcanic series,Oahu, Hawaii, has been melted in the presence of nearly pureH₂O. The solidus is intermediate between that of peridotiteand gabbro. The curve displays a temperature minimum around20 kb reflecting the breakdown of plagioclase. The Iiquidusis between 1130 ?C and 1150 ?C between 10 and 20 kb vapor pressure.Amphibole (pargasitic hornblende) has an extensive stabilityfield, reaching a maximum temperature about 20 ?C below thegarnet websterite liquidus at 15 kb and a maximum pressure of27.5 kb at 950 ?C. The amphibole-out curve intersects the soliduswith a positive slope. Liquids formed by partial melting of garnet websterite are quartz-normativewithin the stability field of amphibole, but become olivine-normative(tholeiitic) with increasing temperature. Amphibole and clinopyroxeneare enriched in Tschermak's molecule at higher temperatures,pargasite content of amphibole increases with increasing pressure. A garnet websterite-rich upper mantle containing modal olivineyields quartz-normative (13–16 per cent), aluminous (21–4wt. per cent A1₂O₃) melts at 17 P 10 kb and in the presenceof nearly pure H₂O. However, the presence of amphibole controlsthe liquid composition, a situation not found for liquids formedfrom wet peridotite. In contrast to many basalt liquids, liquidof garnet websterite composition cannot fractionate to andesiteby precipitation of amphibole, as amphibole is not a liquidusphase.  相似文献