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Department of Geophysics

  Bettina Wiegand
 

Science Research Associate


**********************
Department of Geological and Environmental Sciences
367 Panama Street
Stanford University
Stanford, CA 94305-2115

Phone: (650) 736-0752
Fax:      (650) 724 6360

bwiegand@pangea.stanford.edu
 

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GES Department

School of Earth Sciences
 

 


Research
Investigation and development of new isotope tracer methods in environmental and ecosystem research
Research in the Hawaiian ecosystem
Calcium isotope fractionation in plants and soils.
Continental dust accumulations and its significance for the nutrient budget of the Hawaiian ecosystem.
(Research projects in collaboration with Peter M. Vitousek, Stanford University, and  Oliver A. Chadwick, UC Santa Barbara) 

Isotope tracers in groundwater research (e.g. isotope ratios of Sr, Nd, Fe, Ca, N)
Investigation of shallow groundwater systems in Northwestern Germany

Reconstruction of continental climate variations in central Europe during the Late Pleistocene and Early Holocene
Investigation of speleothems from different cave systems in Germany (230Th/234U dating, stable isotopes, strontium isotopes, trace elements (in collaboration with the Center of Geoscience, University of Goettingen, and TU Darmstadt, Germany)

Education and Experience
Education
 
Ph.D. 1996  Center of Geoscience, Goettingen, Germany
Employment
 
1997 - 2000  Post-doctoral researcher at the University of Goettingen, Germany 
2001 - 2002  Visiting Scholar, Geological & Environmental Sciences, Stanford University and U.S. Geological Survey, Menlo Park, CA.
2002 - present Science Research Associate, Geological & Environmental Sciences, Stanford University 
 
Abstracts and Publications
 
WIEGAND, B.A., CHADWICK, O.A., VITOUSEK, P.M., WOODEN, J.L. (2005): Ca cycling and isotopic fluxes in forested ecosystems in Hawaii. Geophysical Research Letters, 32, L11404, doi 10.1029/20005GL022746

NORDHOFF, P., WIEGAND, B., SIMON, K., ROSENDAHL, W., HANSEN, B.T., KEMPE, S. (2003): Reconstruction of Late Quaternary Climate in Central Europe – A Comparison of Stable Isotope and Trace Element Variations in Speleothems from Different Cave Systems in Germany. AGU Fall Meeting, San Francisco, Dec 8-12, 2003, USA.

WIEGAND, B.A., CHADWICK, O.A., VITOUSEK, P.M., WOODEN, J.L. (2003): Ca Isotope Fractionation in the Hawaiian Ecosystem. AGU Fall Meeting, San Francisco, Dec 8-12, 2003, USA.

WIEGAND, B., NORDHOFF, P., Bechthold, M., SIMON, K., ROSENDAHL, W., HANSEN, B.T.(2003): A Multiproxy Approach to the Continental Paleoclimate During the Late Pleistocene/Holocene – Investigations From Cave Systems in Germany. – 6. Deutsche Klimatagung, September 22-25, 2003, Potsdam, Germany.

VOGEL, M.B., WOODEN, J.L., WIEGAND, B., MEIBOM, A. (2003): Geochemistry of Neoproterozoic Carbonates: Relations Between D13C Excursions and Rare Earth Elements. Geological Society of America, Annual Meeting, Seattle, Nov. 2-5, 2003, USA (P. 471-8).

CARTER, S.W., WIEGAND, B., MAHOOD, G.A., DUDAS, F.O., WOODEN, J.L., SULLIVAN, A.P., SAMUEL, A. (2003): Strontium Isotopic Analysis as a Tool for Ceramic Provenance Research. Abstract: Geological Society of America, Annual Meeting, Seattle, Nov. 2-5, 2003, USA (P. 399-5).

ROSENDAHL, W., WIEGAND, B., EISENHAUER, A. & KEMPE, S. (2003): Première datations absolues de spéleothèmes d’un cavité de l’Eifel, Allemagne. – Speleochronos, No. 11, 8 pp.; Mons. (in press).

BECKER, T., WIEGAND, B., HANSEN, B.T. & WEBER, K. (2003): Isotope systematics (Sm/Nd, Rb/Sr, U/Pb) of the Elim Fm, the Alberta Complex, and the Weener Igneous Complex – probable genetic links between magmatic rocks of the early Rehoboth Basement Inlier/Namibia. - Communications Geol. Survey Namibia. (in press)

NORDHOFF, P., WIEGAND, B., ROSENDAHL, W., SIMON, K., HANSEN, B.T., KEMPE, S. (2003): Stable Isotope and Trace Element Variations in a Speleothem from the Swabian Albs, Southern Germany. – Abstract, Symposium: Climate Changes – The Karst Record III, May 11-14, 2003, Montpellier, France.

ROSENDAHL, W., KEMPE, S., WIEGAND, B., EISENHAUER, A. & HANSEN, B. (2003): Caves as terrestrial archives of Pleistocene paleoclimate and paleoenvironment information – an overview. – Abstrat, DEKLIM-EEM, 2nd Workshop – Climate change at the very end of a warm stage, March 2003, 24th-28th in Heidelberg, p. 7-8; Mainz.

KEMPE, S., ROSENDAHL, W., WIEGAND, B., & EISENHAUER, A. (2002): New Speleothem Dates from Caves in Germany and their Importance for the Middle and Upper Pleistocene Climatic Reconstruction. – Acta Geologica Polonica 52/1, 55-61.

TÜTKEN, T., EISENHAUER, A., WIEGAND, B. & HANSEN, B.T. (2002): Glacial-interglacial cycles in Sr and Nd isotopic composition of Arctic marine sediments: Changes in sediment provenance tiggered by the Svalbard/Barents Sea ice sheet. – Marine Geology 182: 351-372.

WIEGAND, B., DIETZEL, M., ROSENDAHL, W., NORDHOFF, P., KEMPE, S. & HANSEN, B.T. (2002): Stable isotope and trace element variation in a stalagmite from the Eifel, Western Germany. Conference GEO 2002, October 1-5, 2002, Würzburg, Abstract: Schriftenreihe DGG, Heft 21: 352-353; Hannover, Germany.

WIEGAND, B., ZIEGLER, K., HOTCHKISS, S.C., CHADWICK, O.A.,  BULLEN, T.D., VITOUSEK, P., WOODEN, J.L. & FITZPATRICK, J. (2002): 41 ka dust accumulation in a peat bog , Kohala, Hawaii – Local vs. Asian dust sources. – 6th Intern. Symposium on the Geochemistry of the Earth’s Surface (GES-6), Honolulu, Hawaii, May 20-24, 2002, pp. 99-102.

WIEGAND, B., BULLEN, T.D., VITOUSEK, P., CHADWICK, O.A. & WOODEN, J.L. (2002): Ca isotopes as inicator for sources of calcium in Metrosideros Polymorpha at different sites in Hawaii. – 3rd Internat. Conference, Applications of Stable Isotope Techniques to Ecological Studies, Flagstaff, AZ, USA, April 30-May 1, 2002. Abstract volume, p. 160.

ROSENDAHL, W., WIEGAND, B., & KEMPE, S. (2001): Speleothems and Pleistocene Climate – New dating results from caves in Germany and their correlation with the GRIP ice core record. – PAGES – PEP III, Past Climate Variability Through Europe and Africa, International Conference, Aix-en-Provence, August 27-31, 2001, Abstracts: 133-134.

DIETZEL, M., WIEGAND, B., ROSENDAHL, W. (2001) : 18O/16O, 87Sr/86Sr, and 234U/230Th composition of a speleothem from a cave in Western Germany. – Berichte der Deutschen Mineralogischen Gesellschaft, Beihefte zum European Journal of Mineralogy, 13/1 : 40.

WIEGAND, B., GROTH, P., DIETZEL, M., HANSEN, B.T. (2001): A combined isotope and trace element study as tracer for hydrochemical processes in a shallow groundwater system (NW Germany). - 4th Internat. Symp. on Applied Isotope Geochemistry, June 25 – 29. 2001, Pacific Groove, CA., USA.

DIETZEL, M., WIEGAND, B., ROSENDAHL, W. (2001) : Chemical and isotopic composition of a speleothem from a cave in Western Germany. – 4th Internat. Symp. on Applied Isotope Geochemistry, June 25 – 29. 2001, Pacific Groove, CA., USA.

WIEGAND, B., DIETZEL, M., BIELERT, U., GROTH, P. & HANSEN, B.T. (2001): 87Sr/86Sr-Verhältnisse als Tracer für geochemische Prozesse in einem Lockergesteinsaquifer (Liebenau, NW-Deutschland). Translated: 87Sr/86Sr ratios as Tracer for geochemical processes in an unconsolidated sediment aquifer (Liebenau, NW-Germany). - Acta hydrochimica et hydrobiologica, 29, 2-3: 139-152. 

ROSENDAHL, W., WIEGAND, B. (2000): Speleochronologische und geochemische Untersuchungen an einem Stalagmiten aus einer Karsthöhle der Eifel/Rheinland Pfalz. Translated: Speleochronological and geochemical investigations of a stalagmite from a cave of the Eifel/Rhineland. – Mainzer naturwiss. Archiv 38: 29-41.

ROSENDAHL, W., WIEGAND, B., EISENHAUER, A. & KEMPE, S. (2000): Paläoklima im Pleistozän der Allgäuer Alpen - speläochronologische Beiträge aus der Klaus-Cramer Höhle/Region Hochifen-Gottesackerplateau. Translated: Paleoclimate during the Pleistocene of the Allgaeu Alps – speleochronological reports from the Klaus-Cramer Cave/Region of Hochifen-Gottesackerplateau. - Jahrbuch Karst und Höhle 2000/2001, 175-182. München.

KEMPE, S., ROSENDAHL, W., WIEGAND, B., EISENHAUER, A. & (2000): New Speleothem Datation from Caves in Germany and their importance for the Middle- and upper Pleistocene Climate reconstruction. – Climate Changes – the Karst Record II, Guidebook and Abstracts: p. 74; Krakow.

ROSENDAHL, W., WIEGAND, B., EISENHAUER, A. & KEMPE, S. (2000): Speleothems and upper Pleistocene Climate – New results from Caves in Germany. – Geolines, 11, Proceedings of the Internat. Conference on Past Global Changes „Upper Pleistocene and Holocene Climatic Variations“, 161-163; Praha.

ROSENDAHL, W., WIEGAND, B., ROSENDAHL, G., EISENHAUER, A. & KEMPE, S. (1999): Premières datations absolues de spéléothèmes d'une cavité de l'Eifel, Allemagne. - Journée de Spéléologie Scientifique 1999, Nov. 20.; Han-Sur-Lesse (Belgien).

EISENHAUER, A., MEYER, H., RACHOLD, V.,  TÜTKEN, T., WIEGAND, B., HANSEN, B.T., SPIELHAGEN, R.F., LINDEMANN, F. & KASSENS, H. (1999): Grain size separation and sediment mixing in Arctic Ocean Sediments: evidence from the strontium isotope systematic. – Chemical Geology 158: 173-188.

WIEGAND, B., GROTH, P., BIELERT, U., HANSEN, B.T. & EISENHAUER, A. (1999): Characterization of a Sandy Silicate Aquifer by Sr and Nd Isotopes in Groundwater (Water Works Liebenau II, NW Germany). – 3rd Internat. Symp. on Applied Isotope Geochemistry, Sept. 21-25,1999, Orleans, France: p. 74-75.

WIEGAND, B., BIELERT, U., EISENHAUER, A. & HANSEN, B.T. (1999): Modellierung hydrodyna-mischer Prozesse mit Hilfe von 87Sr/86Sr-Verhältnissen am Beispiel des Wasserwerkes Liebenau II (Landkreis Nienburg-Weser). Translated: Modeling of hydrodynamic processes using 87Sr/86Sr ratios, Water works Liebenau II (County of Nienburg-Weser) – 3rd Geochemical Meeting, May 13.-15. 1999, Göttingen: p. 57-58. 

TÜTKEN, T., EISENHAUER, A., HANSEN, B. & WIEGAND, B. (1999): Sr and Nd Isotopes as Tracers for Climate Dependent Variations of the Sediment Provenance and Transport Processes in the Eastern Arctic Ocean During the Late Quaternary. - EUG 10, 28.03.-1.04. 1999, Strasbourg, France. - J. Conf. Abs. 4, p. 165.

WIEGAND, B. & HANSEN, B.T. (1999): Verwendung von 87Sr/86Sr-Isotopenverhältnissen als Tracer in der Hydrogeologie. Translated: Use of 87Sr/86Sr ratios as a tracer in hydrogeology - GEOLOGICA, 8.-10. April 1999, Stuttgart.

WIEGAND, B., BIELERT, U., GROTH, P., EISENHAUER, A. & HANSEN, B. (1998): Use of 87Sr/86Sr Ratios as Tracer in Hydrology. - Geo-Berlin, 6.-9.10.1998, Berlin. - Abstract: Terra Nostra 98/3, V388-389.

WIEGAND, B., BIELERT, U., EISENHAUER, A. & HANSEN, B. (1998): Sr-Isotope als Tracer zur Bestimmung von Mischungsverhältnissen zweier unterschiedlicher Wässer am Beispiel des Göttinger Trinkwassers. – Translated: Sr isotopes as a tracer to investigate mixing relations of two different waters, example: drinking water of Göttingen. – 2nd Geochemical Meeting, 21. - 23. Mai 1998, BGR, Hannover.

ROSENDAHL, W., EISENHAUER, A. & WIEGAND, B. (1998): Erste Ergebnisse von TIMS U/Th-Datierungen an Speläothemen aus einem Höhlensystem des Gottesackerplateaus (Kleinwalser-tal/Allgäuer Alpen). Translated: First results of TIMS U/Th dating pf speleothems from a cave system of the Gottesackerplateau (Kleinwalser Valley/Allgaeu Alps). - Mitt. Verb. dt. Höhlen- u. Karstforsch., 44: 134-138, München.

WIEGAND, B. & HANSEN, B.T. (1997): Altersstellung und Genese frühpalaeozoischer Magmatite im Übergangsbereich Saxothuringikum-Moldanubikum (Grenzgebiet BRD/CR). Translated: Age and genesis of early-Palaeocoic magmatites of the Saxothuringian-Moldanubian transition zone. – Meeting of the German Mineralogical Society, DMG-Tagung 15.-19.09.97, Köln. - Berichte der Dt. Mineral. Gesellsch., Beih. z. Eur. J. Mineral., 9,1: S. 385.

EISENHAUER, A., RACHOLD, V., MEYER, H., KASSENS, H., LINDEMANN, F., SPIELHAGEN, R.F. & WIEGAND, B. (1997): Strontium Isotope Geochemistry of Laptev Sea surface sediments, ice-rafted detritus, and suspended particulate material of East Siberian rivers: implications for sediment distribution patterns in the Arctic Ocean. - Abstract, 7th annual V. M. Goldschmidt Conference, Tuscon USA, 2-6 June, 1997.

WIEGAND, B. (1997): Isotopengeologische und geochemische Untersuchungen zur prävariskischen magmatischen und sedimentären Entwicklung im saxothuringisch-moldanubischen Übergangs-bereich (Grenzgebiet BRD/CR). Translated: Isotopegeological and geochemical investigations of the pre-Variscan magmatic and sedimentary evolution of the Saxothuringian-Moldanubian transition zone (Border area Germany/Tschech Republic) - Geotektonische Forschungen 88: 177 pp., Stuttgart.

BECKER, T., HANSEN, B.T., WEBER, K. & WIEGAND, B. (1997): U-Pb and Rb-Sr isotopic data of the Mooirivier Complex, the Weener Igneous Suite, and the Gaub Valley Formation (Rehoboth Sequence), Nauchas area and their significance for the paleoproterozoic evolution of Namibia. - Communications Geol. Survey Namibia, 11: 33-48.

WIEGAND, B., HANSEN, B.T. & BECKER, T. (1995): Time of Sr-Isotope Homogenization of Marbles and Calcsilicate Rocks from the Saxothuringian-Moldanubian Transition Zone. -  Zbl. Geol. Paläont. 5/6, Teil 1: 469-472; Stuttgart.

WIEGAND, B., HANSEN, B.T. & VEJNAR, Z. (1994): Sr-Isotope-Homogenization of Marbles and Calcsilicate Rocks from the Saxothuringian-Moldanubian Transition Zone. - In: Abstracts -  Kurzfassungen zum 10. Rundgespräch "Geodynamik des Europäischen Variszikums", 16. - 20. Okt. 1994, Bayreuth, Bayerisches Geoinstitut, Bayreuth, (Hrsg. Dr. V. von Seckendorff).

WIEGAND, B. (1991): Untersuchungen zur Sedimentationsgeschichte des Höllerer Sees (Oberösterreich). – Translated: Investigation of the sedimentary history of the lake “Höllerer See“ (Austria). Diploma thesis University of Göttingen, Germany.
 
 

 
last updated  December 7, 2005

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