SwePub - sökning: WFRF:(Possnert G.)

Numrering	Referens	Omslagsbild	Hitta
1.	Birks, HH, et al. (författare) The Krakenes late-glacial palaeoenvironmental project 1996 Ingår i: JOURNAL OF PALEOLIMNOLOGY. - : KLUWER ACADEMIC PUBL. ; 15:3 Annan publikation (övrigt vetenskapligt/konstnärligt)abstract Krakenes is the site of a small lake on the west coast of Norway that contains a long sequence of late-glacial sediments. The Younger Dryas is well represented, as a cirque glacier developed in the catchment at this time. This site offers unique opportuni
2.	Bjorck, S, et al. (författare) A high resolution C-14 dated sediment sequence from southwest Sweden: age comparisons between different components of the sediment 1998 Ingår i: JOURNAL OF QUATERNARY SCIENCE. - : JOHN WILEY & SONS LTD. - 0267-8179. ; 13:1, s. 85-89 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract A macrofossil-rich glaciomarine-marine-lacustrine sediment from a soft-water lake in southwestern Sweden has provided an opportunity to C-14 date different components of its sediments. Bulk sediment dates are 100 to 500 yr older than fragile terrestrial m
3.	Bjorck, S, et al. (författare) Synchronized terrestrial-atmospheric deglacial records around the North Atlantic 1996 Ingår i: SCIENCE. - : AMER ASSOC ADVANCEMENT SCIENCE. - 0036-8075. ; 274:5290, s. 1155-1160 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract On the basis of synchronization of three carbon-14 (C-14)-dated lacustrine sequences from Sweden With tree ring and ice core records, the absolute age of the Younger Dryas-Preboreal climatic shift was determined to be 11,450 to 11,390 +/- 80 years before
4.	Eriksson, JA, et al. (författare) An improved method for preparing a pollen concentrate suitable for C-14-dating 1996 Ingår i: GRANA. - : SCANDINAVIAN UNIVERSITY PRESS. - 0017-3134. ; 35:1, s. 47-50 Tidskriftsartikel (refereegranskat)abstract An improved procedure for preparing a pollen concentrate from clayey sediments is presented. Two new steps have been added compared with earlier procedures. Firstly an initial dispersion which enhances the pollen yield from a sample so that a smaller amou
5.	Wohlfarth, B, et al. (författare) Pitfalls in the AMS radiocarbon-dating of terrestrial macrofossils 1998 Ingår i: JOURNAL OF QUATERNARY SCIENCE. - : JOHN WILEY & SONS LTD. - 0267-8179. ; 13:2, s. 137-145 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The AMS C-14 technique has the advantage that small samples of Late Quaternary age can be dated with high accuracy, and that errors due to reservoir effects can be avoided if specifically determined terrestrial micro- and macrofossils are measured. Howeve
6.	Aldahan, A, et al. (författare) A high-resolution Be-10 profile from deep sea sediment covering the last 70 ka: Indication for globally synchronized environmental events 1998 Ingår i: QUATERNARY SCIENCE REVIEWS. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0277-3791. ; 17:11, s. 1023-1032 Tidskriftsartikel (refereegranskat)abstract We present a high-resolution Be-10 profile from deep sea sediments (sampled from Hole 502B in the Caribbean sea) that strongly resembles the 10Be record in ice core profiles, particularly the Vostok core from Antarctica. This high-resolution profile revea
7.	Aldahan, AA, et al. (författare) Be-10 and chemistry of impactites and target materials from the Rio Cuarto crater field, Argentina: Evidence for surficial cratering and melting 1997 Ingår i: GFF. - : SWEDISH SCIENCE PRESS. - 1103-5897. ; 119, s. 67-72 Tidskriftsartikel (refereegranskat)abstract We report in this study on the distribution of the cosmogenic isotope Be-10 and major and trace elements in impactites (clast-rich melt and glasses) and target materials (soil and loess) from the Rio Cuarto crater field in the Pampas of Argentina. The Be-
8.	Aldahan, AA, et al. (författare) Be-10 records from sediments of the Arctic Ocean covering the past 350 ka 1997 Ingår i: MARINE GEOLOGY. - : ELSEVIER SCIENCE BV. - 0025-3227. ; 144:1-3, s. 147-162 Tidskriftsartikel (refereegranskat)abstract Records of Be-10, Be-9, mineralogy and grain size were obtained from two cores collected by the Polarstern Expedition 1991 in the southern Nansen Basin (Core 2213-6) and the Yermak Plateau (Core 2208-2). The accumulation of sediments examined started from
9.	Aldahan, A, et al. (författare) Distribution of beryllium between solution and minerals (biotite and albite) under atmospheric conditions and variable pH 1999 Ingår i: CHEMICAL GEOLOGY. - : ELSEVIER SCIENCE BV. - 0009-2541. ; 156:1-4, s. 209-229 Tidskriftsartikel (refereegranskat)abstract Biotite and albite grains having a size range from 20 to 124 mu m were suspended in Be-bearing solutions at pH 2 to 9 for periods of 30 min to 20 days. The amount of Be sorbed onto biotite is up to 40 times higher than onto albite under the same condition
10.	Aldahan, A, et al. (författare) Linking the Be-10 continental record of Lake Baikal to marine and ice archives of the last 50 ka: Implication for the global dust-aerosol input 1999 Ingår i: GEOPHYSICAL RESEARCH LETTERS. - : AMER GEOPHYSICAL UNION. - 0094-8276. ; 26:18, s. 2885-2888 Tidskriftsartikel (refereegranskat)abstract We present here a Be-10 profile from the continental sediments of Lake Baikal (the world's largest fresh water lake), which, for the first time, shows the approximate to 40 ka Be-10 enhancement and a pattern that strongly marches those from the marine and
11.	Aldahan, A, et al. (författare) Sixty year Be-10 record from Greenland and Antarctica 1998 Ingår i: PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-EARTH AND PLANETARY SCIENCES. - : INDIAN ACADEMY SCIENCES. - 0253-4126. ; 107:2, s. 139-147 Tidskriftsartikel (refereegranskat)abstract We report in this study the distribution of Be-10 in the top 40 m of the Renland ice core (East Greenland) and in a 30 m long core from DML (Dronning Maud Land, Antarctica) for the period 1931-1988. The two sites show differences in Be-10 content, the Ant
12.	Barnekow, L, et al. (författare) AMS C-14 chronologies of Holocene lake sediments in the Abisko area, northern Sweden - a comparison between dated bulk sediment and macrofossil samples 1998 Ingår i: GFF. - : SWEDISH SCIENCE PRESS. - 1103-5897. ; 120, s. 59-67 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract AMS-radiocarbon dates of bulk sediment samples were compared to AMS-radiocarbon dates of terrestrial plant macrofossils from two neighbouring lakes in northern Sweden. Both sediment successions cover the period from the last deglaciation to the present. T
13.	Birks, H.H., et al. (författare) The Kråkenes Late-glacial Palaeoenvironmental Project. 1996 Ingår i: Journal of Paleolimnology. - 0921-2728 .- 1573-0417. ; 15:3, s. 281-286 Tidskriftsartikel (refereegranskat)abstract Krakenes is the site of a small lake on the west coast of Norway that contains a long sequence of late-glacial sediments. The Younger Dryas is well represented, as a cirque glacier developed in the catchment at this time. This site offers unique opportunities to reconstruct late-glacial environments from independent sources of evidence; physical evidence (glacial geomorphology, sedimentology, palaeomagnetism, radiocarbon dating), and biological evidence from the remains of animals and plants derived from both the terrestrial and aquatic ecosystems. This report describes the background to the site, and the international multidisciplinary project to reconstruct late-glacial and early Holocene environmental and climatic changes at Krakenes.
14.	Birks, HH, et al. (författare) New radiocarbon dates for the Vedde ash and the Saksunarvatn ash from western Norway 1996 Ingår i: QUATERNARY RESEARCH. - : ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS. ; 45:2, s. 119-127 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The Vedde Ash Bed (mid-Younger Dryas) and the Saksunarvatn Ash (early Holocene) are important regional stratigraphic event markers in the North Atlantic, the Norwegian Sea, and the adjacent land area, It is thus essential to date them as precisely as poss
15.	BJORCK, S, et al. (författare) C-14 AMS MEASUREMENTS FROM THE LATE WEICHSELIAN PART OF THE SWEDISH TIME-SCALE 1995 Ingår i: QUATERNARY INTERNATIONAL. - : PERGAMON-ELSEVIER SCIENCE LTD. ; 27, s. 11-18 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Accelerator mass spectrometry measurements on plant macrofossils from the older part of the Swedish Time Scale, a chronology spanning over the past 13,000 calendar years, indicate a good agreement between varve years and calibrated ages (tree-rings, U-Th)
16.	Björck, S., et al. (författare) Synchronized terrestrial-atmospheric deglacial records around the North Atlantic. 1996 Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 274:5290, s. 1155-1160 Tidskriftsartikel (refereegranskat)abstract On the basis of synchronization of three carbon-14 (C-14)-dated lacustrine sequences from Sweden With tree ring and ice core records, the absolute age of the Younger Dryas-Preboreal climatic shift was determined to be 11,450 to 11,390 +/- 80 years before the present. A 150-year-long cooling in the early Preboreal, associated with rising Delta(14)C values, is evident in all records and indicates an ocean ventilation change. This cooling is similar to earlier deglacial coolings, and box-model calculations suggest that they all may have been the result of increased freshwater forcing that inhibited the strength of the North Atlantic heat conveyor, although the Younger Dryas may have begun as an anomalous meltwater event.
17.	Buraglio, N, et al. (författare) Distribution and inventory of I-129 in the central Arctic Ocean 1999 Ingår i: GEOPHYSICAL RESEARCH LETTERS. - : AMER GEOPHYSICAL UNION. - 0094-8276. ; 26:8, s. 1011-1014 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The concentration of I-129 was measured in water samples from three depth profiles collected in the central Arctic Ocean during 1996. The results indicate >7x10(8) atoms/liter in the cold, low salinity, 100-m-deep surface layer, and 0.06x10(8) atoms/liter
18.	Goslar, T, et al. (författare) Variations of atmospheric C-14 concentrations over the Allerod-Younger Dryas transition 1999 Ingår i: CLIMATE DYNAMICS. - : SPRINGER VERLAG. - 0930-7575. ; 15:1, s. 29-42 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Highly variable atmospheric radiocarbon concentrations are a distinct feature during the last deglaciation. The synchronisation of two high-resolution AMS C-14-dated records, Lake Gosciaz, and a floating Late Weichselian glacial varve chronology at the Al
19.	Greenwood, AD, et al. (författare) Nuclear DNA sequences from late Pleistocene megafauna 1999 Ingår i: MOLECULAR BIOLOGY AND EVOLUTION. - : SOC MOLECULAR BIOLOGY EVOLUTION. - 0737-4038. ; 16:11, s. 1466-1473 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract We report the retrieval and characterization of multi- and single-copy nuclear DNA sequences from Alaskan and Siberian mammoths (Mammuthus primigenius). In addition, a nuclear copy of a mitochondrial gene was recovered. Furthermore, a 13,000-year-old grou
20.	Gulliksen, S, et al. (författare) A calendar age estimate of the Younger Dryas-Holocene boundary at Krakenes, western Norway 1998 Ingår i: HOLOCENE. - : ARNOLD, HODDER HEADLINE PLC. - 0959-6836. ; 8:3, s. 249-259 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The Younger Dryas/Holocene transition (YD/H) in the sediments of Krakenes Lake, western Norway, is well marked both lithologically and palaeobiologically at 756.5 cm in the investigated core. A series of 70 AMS radiocarbon dates on terrestrial plant macro
21.	Hammarlund, Dan, et al. (författare) Multi-component carbon isotope evidence of early Holocene environmental change and carbon-flow pathways from a hard-water lake in northern Sweden 1997 Ingår i: Journal of Paleolimnology. - 0921-2728. ; 18:3, s. 219-233 Tidskriftsartikel (refereegranskat)abstract A 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis. Radiocarbon dating of different sediment fractions provides chronologic control and reveals a rather constant hard-water effect through time, suggesting lake has remained hydrologically open throughout the Holocene. Successive depletion of C-13 in fine-grained calcite and carbonate shells during the early Holocene correlate with a change in catchment vegetation from pioneer herb communities to boreal forest. The vegetational change and associated soil development likely gave rise to an increased supply of C-13-depleted carbon dioxide in groundwater recharging the lake. This process is therefore believed to be the main cause of decreasing values of delta(13)C in dissolved inorganic carbon of the lake and thereby in limnic carbonates. Strongly C-13-depleted sedimentary organic matter may be related to enhanced kinetic fractionation during photosynthetic assimilation by means of proton pumping in Characean algae. This interpretation is supported by a substantial offset between delta(13)C of DIC as recorded by mollusc shells and delta(13)C Of fine-grained calcite.
22.	Hammarlund, D, et al. (författare) Multi-component carbon isotope evidence of early Holocene environmental change and carbon-flow pathways from a hard-water lake in northern Sweden 1997 Ingår i: JOURNAL OF PALEOLIMNOLOGY. - : KLUWER ACADEMIC PUBL. - 0921-2728. ; 18:3, s. 219-233 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract A 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis. Radiocarbon dating of different sediment fractions provides chronologic control and re
23.	Israelson, C, et al. (författare) Direct U-Th dating of organic- and carbonate-rich lake sediments from southern Scandinavia 1997 Ingår i: EARTH AND PLANETARY SCIENCE LETTERS. - : ELSEVIER SCIENCE BV. ; 153:3-4, s. 251-263 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract U-Th ages of Holocene lacustrine sediments from southern Sweden have been determined to assess the reliability of this technique for dating climatic events from the last interglacial-glacial-interglacial cycle, and for calibration of the C-14 dating metho
24.	Jungner, H, et al. (författare) Use of bomb-produced C-14 to evaluate the amount of CO2 emanating from two peat bogs in Finland 1995 Ingår i: RADIOCARBON. - : UNIV ARIZONA DEPT GEOSCIENCES. ; 37:2, s. 567-573 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract We used moss increment counting to obtain well-defined samples of the topmost peat layers of two Sphagnum fuscum hummocks. The two ombrotrophic bogs, Lakkasuo in central Finland and Korvinsuo in eastern Finland, are of different ages, covering 3 and 9 ka,
25.	Königsson, L-K, et al. (författare) Construction and publication of diversified pollen records - a practical and economic dilemma 1995 Ingår i: Landscapes and Life: studies in honour of Urve Miller. - : Council of Europe. - 0257-8727. ; 50, s. 497-507 Tidskriftsartikel (refereegranskat)

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