Guest scientist at the School of Oceanography and GEOMAR within the Heisenberg program of the DFG.
Tel. (001) 206 543 7615
Fax. (001) 206 685 3351
Mail: lthomsen@ocean.washington.edu
International interdisciplinary studies on the understanding of
transport and biological modification of particles in the ocean (OMEX).
Determination of fluxes
of particulate and dissolved matter within the lowermost water column
and the sediment surface.
Studies on the bioavailabilty and fate of organic particles at continental margins.
Efflux and horizontal export production from cold seeps and gashydrate fields (NEPTUNE).
Instrument developments for deep sea research .
Publications
Thomsen, L. (1991). Treatment and splitting of samples for bacteria and
meiofauna biomass determinations by means of a semi-automatic image analysis
system. Mar. Ecol. Prog. Ser., 71: 301-306.
Thomsen, L. and A.V. Altenbach (1993). Areal distribution of foraminiferal
abundance and biomass in microhabitats around an inhabited tube of a marine
Echiurid. Mar. Micropal., 20: 303-309.
Thomsen, L., G. Graf, M. Martens and E. Steen (1994). An instrument for sampling water from the bottom nepheloid layer. Contin. Shelf Res., 14: 871-882.
Thomsen, L. (1995). Monitoring physical, biogeochemical parameters at sea. Sea Techn. 36/7. 55-58.
Thomsen, L. and G. Graf (1995). Characteristics of suspended particulate
matter in the benthic boundary layer of the continental margin of the western
Barents Sea. Oc. Acta, 17(6): 597-607.
Thomsen, L., G. Graf, K. v. Juterzenka and U. Witte (1995). An in situ
experiment to investigate the depletion ofseston above an interface feeder
field on the
continental slope of the western Barents Sea. Mar. Ecol. Prog. Ser., 123:
295-300.
Graf, G., Gerlach, S.A., Linke, P., Queisser, W., Scheltz, A., Thomsen,
L. and U. Witte (1995). Benthic-Pelagic coupling in the Greenland-Norwegian
Sea and
its effects on the geological record. Geol. Rundschau, 84: 49-58.
Thomsen, L. and W. Ritzrau (1996). Aggregate studies in the benthic boundary layer at a continental margin. J. Sea Res., 36: 143-146.
Thomsen, L., S. Jähmlich, G. Graf, M. Friedrichs, B. Springer and
S. Wanner (1996). An instrument for aggregate studies in the benthic boundary
layer. Mar.
Geol., 135: 153-157.
Ritzrau, W. and L. Thomsen (1997). Spatial distribution of particle composition
and microbial activity in theBenthic Boundary Layer (BBL) of the North
East
Water Polyna. J. Mar. Syst, 10: 415 - 428.
Ritzrau, W., Thomsen, L., Lara, R. and G. Graf (1997). Enhanced microbial
utilization of dissolved amino acids indicates rapid modification of organic
matter
in the benthic boundary layer. Mar. Ecol. Progr. Ser., 156: 43-50.
Thomsen, L. and E. Flach (1997). Mesocosm observations of fluxes of particulate matter within the benthic boundary layer. J. Sea Res., 37: 67-79.
Thomsen, L. (1998). Processes in the Benthic Boundary Layer at continental
margins and their implication for the benthic carbon cycle. J. Sea. Res.,
41:
73-86.
Thomsen, L. and S. Jähmlich (1998). The modification of particulate
matter and urea above a benthic sandy silt community in the Baltic. Hydrobiologia,
375/376: 353-359.
Thomsen, L. and T.C. v.Weering (1998). Spatial and temporal variability
of particulate matter in the benthic boundary layer at the North East Atlantic
Continental Margin (Goban Spur). Prog. Oceanogr., 42: 61-76.
Weering, T.C.E., I.N. McCave, H. de Stigter, I. Hall and L. Thomsen (1998).
Recent sediments, sediment accumulation, and carbon burial at Goban Spur,
NE
Atlantic continental margin. Progr. Oceanogr., 42: 76-92.
Flach, E., Lavaye, M, de Stigter, H. and L. Thomsen (1998). Feeding types and particle transport at Goban Spur, Celtic Sea. Progr. Oceanogr., 42: 209-231.
Flach, E., Thomsen, L., 1998. Do physical and chemical factors structure
the macrobenthic community at the continental slope in the NE Atlantic
?
Hydrobiologia, 375/376: 265-285.
Jähmlich , S., Thomsen, L. and G. Graf (1998). Factors controlling
aggregate formation in the BBL of the Mecklenburg Bight (western Baltic
Sea) J. Sea Res.,
41, 245-254.
Thomsen, L. and I.N. McCave (2000). Aggregation Processes in the Benthic
Boundary Layer at the Celtic Sea Continental Margin. Deep Sea Res. I 47:
1389-1404.
Thomsen, L. and G. Gust (2000). Sediment stability and characteristics
of resuspended aggregates of the western European continental margin. Deep
Sea
Res. I 47: 1881-1897
Weering, T.C.E., Thomsen, L., Heerwarden, J., Koster, B. and Viergutz,
T. (2000). A seabed lander and new techniques for long term in-situ study
of deep sea
near bed dynamics. Sea Technology. February: 17-27.
Reimers, C., Jahnke, R. and L. Thomsen (2001). In situ boundary layer measurements.
In: Boudreau, Jørgensen (Ed.). The Benthic Boundary Layer.
Transport processes and biogeochemistry, Springer, Heidelberg.
Davies, J. Xing, P. Hall, J.M. Huthnance and L. Thomsen (in review) Models
of near-bed dynamics and sediment movement at the Iberian margin. Prog.
Oceanogr
Heip,C., de Wilde, P., Duineveld, G., Flach, E., Graf, G., Lavalaye, M.,
Pfannkuche, O., Soetaert, K., Soldwedel, T., Thomsen, L. and U. Vanaverbeke
U. (2001). The carbon and
particle requirements of benthic communities a long Goban Spur transect,
a sysnthesis. Deep Ses Res., in press.
Huthnance, J.D. Humphery, P.J. Knight, L. Thomsen and M. White (in review)
Near-bed turbulence measurements, stress estimates and sediment mobility
at the continental shelf edge. Prog. Oceanogr
McCave, I.N., Antia, A., von Bodungen, B., Chou, L., Dehairs, F., Hall,
I.R., Lampitt, R.S., Peinert, R.,Thomsen, L., de Striter, H., van Weering,
T.C.E. and R.
Wollast (2001). Sources, Distribution, composition and flux of suspended
particulate material on the European Margin 47 - 50 N: a synthesis of results
from
the OMEX I program. Deep Ses Res., in press
Thomsen, L. and F. Gutthann (in review). Aggregate scavenging rates of
benthic interface feeders at the Iberian continental margin. Limn.
Oceanogr.
Thomsen, L. and T.v. Weering (in press). Sedimenttransport, distribution
pattern of sedimentological properties and biological communities. Sedimentation
in the Norwegian Sea (Schäfer, Thiede, Schlüter and Ritzrau:
Ed.) Springer, Heidelberg.
Thomsen, L., T.v.Weering and G. Gust (in review). Benthic boundary layer characteristics at the Iberian Continental Margin Prog. Oceanogr.
Thomsen, L. (in press). The benthic boundary layer, (Berger, Wefer, ed.) Hanse conference report on "Ocean Margin Systems", Springer,
Thomsen, L., T.V. Weering, P. Blondel, R. Lampitt, F. Lamy, N. McCave,
D. Hebbeln, S. McPhail, J. Mienert, R. Neves, L. díOzouville, D. Ristow,
C.h Waldmann
and R. Wollast, (in press). Margin building- regulating processes, (Berger,
Wefer, ed.) Hanse conference report on "Ocean Margin Systems", Springer,
Weering , T., Thomsen, L., I. Hall, I.N. McCave, A. Antia, H. de Stigter
and G. Graf (2001). Particle fluxes in the BNL at Goban Spur, Celtic Sea.
Deep Ses
Res., in press