Items where Author is "Helmke, Peer"

Romero, OE, Mohtadi, M, Helmke, P and Hebbeln, D (2012) High interglacial diatom paleoproductivity in the westernmost Indo-Pacific Warm Pool during the past 130,000 years. Paleoceanography, 27. PA3209. doi:10.1029/2012PA002299

Helmke, P, Neuer, S, Lomas, MW, Conte, M and Freudenthal, T (2010) Cross-basin differences in particulate organic carbon export and flux attenuation in the subtropical North Atlantic gyre. Deep Sea Research Part I: Oceanographic Research Papers, 57(2). 213-227. doi:10.1016/j.dsr.2009.11.001

Fischer, G, Neuer, S, Davenport, B, Helmke, P, Schlitzer, R, Romero, OE, Ratmeyer, V, Donner, B, Freudenthal, T, Meggers, H and Wefer, G (2010) The Northwest African Margin. In: Liu, KK, Atkinson, L, Quiñones, R and Talaue-McManus, L (eds.) Carbon and Nutrient Fluxes in Continental Margins: A Global Synthesis. The IGBP Series. Springer, Berlin, Heidelberg, 78-102.

Fischer, G, Karakas, G, Blaas, M, Ratmeyer, V, Nowald, N, Schlitzer, R, Helmke, P, Davenport, R, Donner, B, Neuer, S and Wefer, G (2009) Mineral ballast and particle settling rates in the coastal upwelling system off NW Africa and the South Atlantic. International Journal of Earth Sciences, 98(2). 281-298. doi:10.1007/s00531-007-0234-7

Neuer, S, Cianca, A, Helmke, P, Freudenthal, T, Davenport, R, Meggers, H, Knoll, M, Santana-Casiano, JM, Gonzalez Davila, M, Rueda, MJ and Llinás, O (2007) Biogeochemistry and hydrography in the eastern subtropical North Atlantic gyre. Results from the European time-series station ESTOC. Progress in Oceanography, 72. 1-29. doi:10.1016/j.pocean.2006.08.001

Cianca, A, Helmke, P, Mouriño, B, Rueda, MJ, Llinás, O and Neuer, S (2007) Decadal analysis of hydrography and in situ nutrient budgets in the western and eastern North Atlantic subtropical gyre. Journal of Geophysical Research, 112(C7). doi:10.1029/2006JC003788

Helmke, P, Romero, OE and Fischer, G (2005) Northwest African upwelling and its effect on off-shore organic carbon export to the deep sea. Global Biogeochemical Cycles, 19(4). GB4015. doi:10.1029/2004GB002265

Stuut, JB, Zabel, M, Ratmeyer, V, Helmke, P, Schefuß, E, Lavik, G and Schneider, RR (2005) Provenance of present-day eolian dust collected off NW Africa. Journal of Geophysical Research-Atmospheres, 110. D04202. doi:10.1029/2004JD005161

Kuhlmann, H, Freudenthal, T, Helmke, P and Meggers, H (2004) Reconstruction of paleoceanography off NW Africa during the last 40,000 years: influence of local and regional factors on sediment accumulation. Marine Geology, 207(1-4). 209-224. doi:10.1016/j.margeo.2004.03.017

Meggers, H, Freudenthal, T, Nave, SO, Targarona, J, Abrantes, FF and Helmke, P (2002) Assessment of geochemical and micropaleontological sedimentary parameters as proxies of surface water properties in the Canary Islands region. Deep Sea Research Part II: Topical Studies in Oceanography, 49(17). 3631-3654. doi:10.1016/S0967-0645(02)00103-0

Davenport, R, Neuer, S, Helmke, P, Perez-Marrero, J and Llinás, O (2002) Primary productivity in the northern Canary Islands region as inferred from SeaWiFS imagery. Deep Sea Research Part II: Topical Studies in Oceanography, 49. 3481-3496. doi:10.1016/S0967-0645(02)00095-4

Bleil, U, Breitzke, M, Däumler, K, Dittert, N, Ewert, J, Gohl, K, Heesemann, B, Heinitz, WD, Helmke, P, Keil, H, Merkel, T, Pioch, B, Potozki, F, Rosiak, U, Schneider, RR, Schwenk, T, Spieß, V and Uenzelmann-Neben, G (1994) Report and preliminary results of Sonne Cruise SO86, Buenos Aires - Capetown, 22.4.-31.5.1993. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 051. Department of Geosciences, Bremen University. urn:nbn:de:gbv:46-ep000101881