Items where Author is "Romero, Oscar E"

Romero, OE, LeVay, LJ, McClymont, EL, Müller, J and Cowan, EA (2022) Orbital and suborbital‐scale variations of productivity and sea surface conditions in the Gulf of Alaska during the past 54,000 years: impact of iron fertilization by icebergs and meltwater. Paleoceanography and Paleoclimatology, 37(1). doi:10.1029/2021PA004385

Versteegh, GJM, Zonneveld, KAF, Hefter, J, Romero, OE, Fischer, G and Mollenhauer, G (2022) Performance of temperature and productivity proxies based on long-chain alkane-1, mid-chain diols at test: a 5-year sediment trap record from the Mauritanian upwelling. Biogeosciences, 19(5). 1587-1610. doi:10.5194/bg-19-1587-2022

Sánchez Montes, ML, Romero, OE, Cowan, EA, Müller, J, Moy, CM, Lloyd, JM and McClymont, EL (2022) Plio‐pleistocene ocean circulation changes in the Gulf of Alaska and its impacts on the Carbon and nitrogen cycles and the Cordilleran Ice Sheet Development. Paleoceanography and Paleoclimatology, 37(7). doi:10.1029/2021PA004341

Romero, OE, Ramondenc, S and Fischer, G (2021) A 2-decade (1988–2009) record of diatom fluxes in the Mauritanian coastal upwelling: impact of low-frequency forcing and a two-step shift in the species composition. Biogeosciences, 18(5). 1873-1891. doi:10.5194/bg-18-1873-2021

Fischer, G, Romero, OE, Karstensen, J, Baumann, KH, Moradi, N, Iversen, MH, Ruhland, G, Klann, M and Körtzinger, A (2021) Seasonal flux patterns and carbon transport from low-oxygen eddies at the Cape Verde Ocean Observatory: lessons learned from a time series sediment trap study (2009–2016). Biogeosciences, 18(24). 6479-6500. doi:10.5194/bg-18-6479-2021

Romero, OE, Baumann, KH, Zonneveld, KAF, Donner, B, Hefter, J, Hamady, B, Pospelova, V and Fischer, G (2020) Flux variability of phyto- and zooplankton communities in the Mauritanian coastal upwelling between 2003 and 2008. Biogeosciences, 17(1). 187-214. doi:10.5194/bg-17-187-2020

Fischer, G, Romero, OE, Toby, E, Iversen, MH, Donner, B, Mollenhauer, G, Nowald, N, Ruhland, G, Klann, M, Hamady, B and Wefer, G (2019) Changes in the dust‐influenced biological carbon pump in the Canary Current System: implications from a coastal and an offshore sediment trap record off Cape Blanc, Mauritania. Global Biogeochemical Cycles, 33(8). 1100-1128. doi:10.1029/2019GB006194

Hepp, DA, Romero, OE, Mörz, T, de Pol-Holz, R and Hebbeln, D (2019) How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise. Journal of Quaternary Science, 34(7). 581-592. doi:10.1002/jqs.3147

Schmidt, C, Morard, R, Romero, OE and Kucera, M (2018) Diverse internal symbiont community in the endosymbiotic foraminifera Pararotalia calcariformata: implications for symbiont shuffling under thermal stress. Frontiers in Microbiology, 9. doi:10.3389/fmicb.2018.02018

Romero, OE and Fischer, G (2017) Shift in the species composition of the diatom community in the eutrophic Mauritanian coastal upwelling: Results from a multi-year sediment trap experiment (2003–2010). Progress in Oceanography, 159. 31-44. doi:10.1016/j.pocean.2017.09.010

Fischer, G, Karstensen, J, Romero, OE, Baumann, KH, Donner, B, Hefter, J, Mollenhauer, G, Iversen, MH, Fiedler, B, Monteiro, I and Körtzinger, A (2016) Bathypelagic particle flux signatures from a suboxic eddy in the oligotrophic tropical North Atlantic: production, sedimentation and preservation. Biogeosciences, 13(11). 3203-3223. doi:10.5194/bg-13-3203-2016

Fischer, G, Romero, OE, Merkel, U, Donner, B, Iversen, MH, Nowald, N, Ratmeyer, V, Ruhland, G, Klann, M and Wefer, G (2016) Deep ocean mass fluxes in the coastal upwelling off Mauritania from 1988 to 2012: variability on seasonal to decadal timescales. Biogeosciences, 13(10). 3071-3090. doi:10.5194/bg-13-3071-2016

Abrantes, FF, Cermeño, P, Lopes, C, Romero, OE, Matos, L, Van Iperen, J, Rufino, M and Magalhães, V (2016) Diatoms Si uptake capacity drives carbon export in coastal upwelling systems. Biogeosciences, 13(14). 4099-4109. doi:10.5194/bg-13-4099-2016

Romero, OE, Fischer, G, Karstensen, J and Cermeño, P (2016) Eddies as trigger for diatom productivity in the open-ocean Northeast Atlantic. Progress in Oceanography, 147. 38-48. doi:10.1016/j.pocean.2016.07.011

McKay, CL, Filipsson, HL, Romero, OE, Stuut, JBW and Björck, S (2016) The interplay between the surface and bottom water environment within the Benguela Upwelling System over the last 70 ka. Paleoceanography, 31(2). 266-285. doi:10.1002/2015PA002792

Cermeño, P, Falkowski, PG, Romero, OE, Schaller, MF and Vallina, SM (2015) Continental erosion and the Cenozoic rise of marine diatoms. Proceedings of the National Academy of Sciences, 112(14). 4239-4244. doi:10.1073/pnas.1412883112

McKay, CL, Filipsson, HL, Romero, OE, Stuut, JB and Donner, B (2014) Pelagic–benthic coupling within an upwelling system of the subtropical northeast Atlantic over the last 35 ka BP. Quaternary Science Reviews, 106. 299-315. doi:10.1016/j.quascirev.2014.04.027

Gallego-Torres, D, Romero, OE, Martínez-Ruiz, F, Kim, JH, Donner, B and Ortega-Huertas, M (2014) Rapid bottom-water circulation changes during the last glacial cycle in the coastal low-latitude NE Atlantic. Quaternary Research, 81(2). 330-338. doi:10.1016/j.yqres.2013.11.004

Razik, S, Chiessi, CM, Romero, OE and von Dobeneck, T (2013) Interaction of the South American Monsoon System and the Southern Westerly Wind Belt during the last 14 kyr. Palaeogeography, Palaeoclimatology, Palaeoecology, 374. 28-40. doi:10.1016/j.palaeo.2012.12.022

Channell, JET, Hodell, DA, Romero, OE, Hillaire-Marcel, C, de Vernal, A, Stoner, JS, Mazaud, A and Röhl, U (2012) A 750-kyr detrital-layer stratigraphy for the North Atlantic (IODP Sites U1302-U1303, Orphan Knoll, Labrador Sea). Earth and Planetary Science Letters, 317-31. 218-230. doi:10.1016/j.epsl.2011.11.029

Pälike, H, Lyle, MW, Nishi, H, Raffi, I, Ridgwell, A, Gamage, K, Klaus, A, Acton, GD, Anderson, L, Backman, J, Baldauf, JG, Beltran, C, Bohaty, SM, Bown, PR, Busch, WH, Channell, JET, Chun, COJ, Delaney, ML, Dewang, P, Dunkley Jones, T, Edgar, KM, Evans, HF, Fitch, P, Foster, GL, Gussone, N, Hasegawa, H, Hathorne, EC, Hayashi, H, Herrle, JO, Holbourn, AEL, Hovan, SA, Hyeong, K, Iijima, K, Ito, T, Kamikuri, SI, Kimoto, K, Kuroda, J, Leon-Rodriguez, L, Malinverno, A, Moore, TC, Murphy, B, Murphy, DP, Nakamur, H, Ogane, K, Ohneiser, C, Richter, C, Robinson, RS, Rohling, EJ, Romero, OE, Sawada, K, Scher, HD, Schneider, L, Sluijs, A, Takata, H, Tian, J, Tsujimoto, A, Wade, BS, Westerhold, T, Wilkens, RH, Williams, T, Wilson, PA, Yamamoto, Y, Yamamoto, S, Yamazaki, T and Zeebe, RE (2012) A Cenozoic record of the equatorial Pacific carbonate compensation depth. Nature, 488. 609-614. doi:10.1038/nature11360

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

Kim, JH, Romero, OE, Lohmann, G, Donner, B, Laepple, T, Haam, E and Damste, JSS (2012) Pronounced subsurface coolling of North Atlantic waters off Northwest Africa during Dansgaard-Oeschger interstadials. Earth and Planetary Science Letters, 339. 95-102. doi:10.1016/j.epsl.2012.05.018

Romero, OE, Leduc, G, Vidal, L and Fischer, G (2011) Millennial variability and long-term changes of the diatom production in the eastern equatorial Pacific during the last glacial cycle. Paleoceanography, 26. PA2212. doi:10.1029/2010PA002099

Filipsson, HL, Romero, OE, Stuut, JB and Donner, B (2011) Relationshiips between primary productivity and bottom-water oxygenation off northwest Africa during the last deglaciation. Journal of Quaternary Science, 26(4). 448-456. doi:10.1002/jqs.1473

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.

Hodell, DA, Channell, JET, Curtis, JH, Romero, OE and Röhl, U (2008) Onset of 'Hudson Strait' Heinrich Events in the eastern North Atlantic at the end of the middle Pleistocene transition (~640 ka)? Paleoceanography, 23. PA4218. doi:10.1029/2008PA001591

Romero, OE, Kim, JH and Donner, B (2008) Submillennial-to-millennial variability of diatom production off Mauritania, NW Africa, during the last glacial cycle. Paleoceanography, 23. PA3218. doi:10.1029/2008PA001601

Mohtadi, M, Romero, OE, Kaiser, J and Hebbeln, D (2007) Cooling of the southern high latitudes during the Medieval Period and its effect on ENSO. Quaternary Science Reviews, 26(7-8). 1055-1066. doi:10.1016/j.quascirev.2006.12.008

Romero, OE and Schmieder, F (2006) Occurrence of thick Ethmodiscus oozes associated with a terminal Mid-Pleistocene Transition event in the oligotrophic subtropical South Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 235(4). 321-329. doi:10.1016/j.palaeo.2005.10.026

Romero, OE, Kim, JH and Hebbeln, D (2006) Paleoproductivity evolution off central Chile from the Last Glacial Maximum to the Early Holocene. Quaternary Research, 65(3). 519-525. doi:10.1016/j.yqres.2005.07.003

Stuut, JB, Marchant, M, Kaiser, J, Lamy, F, Mohtadi, M, Romero, OE and Hebbeln, D (2006) The late Quaternary paleoenvironment of Chile as seen from marine archives. Geographica Helvetica, 61(2). 135-151. doi:10.5194/gh-61-135-2006

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

Armand, LK, Crosta, X, Romero, OE and Pichon, JJ (2005) The biogeography of major diatom taxa in Southern Ocean sediments: 1. Ice related species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(1-2). 93-126. doi:10.1016/j.palaeo.2005.02.015

Crosta, X, Romero, OE, Armand, LK and Pichon, JJ (2005) The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(1-2). 66-92. doi:10.1016/j.palaeo.2005.03.028

Romero, OE, Armand, LK, Crosta, X and Pichon, JJ (2005) The biogeography of major diatom taxa in Southern Ocean sediments: 3. Subantarctic species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(1-2). 49-65. doi:10.1016/j.palaeo.2005.03.027

Mohtadi, M, Romero, OE and Hebbeln, D (2004) Changing marine productivity off northern Chile during the last 19,000 years: A multivariable approach. Journal of Quaternary Science, 19(4). 347-360. doi:10.1002/jqs.832

Fischer, G, Wefer, G, Romero, OE, Dittert, N, Ratmeyer, V and Donner, B (2004) Transfer of particles into the deep Atlantic and the global ocean: Control of nutrient supply and ballast production. In: Wefer, G, Mulitza, S and Ratmeyer, V (eds.) The South Atlantic in the Late Quaternary: Reconstruction of Material Budgets and Current Systems. Springer, Berlin, Heidelberg, 21-46.

Romero, OE and Hebbeln, D (2003) Biogenic silica and diatom thanatocoenosis in surface sediments below the Peru-Chile Current: controlling mechanisms and relationship with productivity of surface waters. Marine Micropaleontology, 48(1-2). 71-90. doi:10.1016/S0377-8398(02)00161-5

Romero, OE, Mollenhauer, G, Schneider, RR and Wefer, G (2003) Oscillations of the siliceous imprint in the central Benguela Upwelling System from MIS3 through the early Holocene: the influence of the Southern Ocean. Journal of Quaternary Science, 18(8). 733-743. doi:10.1002/jqs.789

Romero, OE, Dupont, LM, Wyputta, U, Jahns, S and Wefer, G (2003) Temporal variability of fluxes of eolian-transported freshwater diatoms, phytoliths, and pollen grains off Cape Blanc as reflection of land-atmosphere-ocean interactions in northwest Africa. Journal of Geophysical Research-Oceans, 108(C5). 3153. doi:10.1029/2000JC000375

Romero, OE, Lange, CB and Wefer, G (2002) Interannual variability (1988-1991) of siliceous phytoplankton fluxes off NW Africa. Journal of Plankton Research, 24(10). 1035-1046. doi:10.1093/plankt/24.10.1035

Romero, OE and Hensen, C (2002) Oceanographic control of biogenic opal and diatoms in surface sediments of the South Western Atlantic. Marine Geology, 186(3-4). 263-280. doi:10.1016/S0025-3227(02)00210-4

Romero, OE, Boeckel, B, Donner, B, Lavik, G, Fischer, G and Wefer, G (2002) Seasonal productivity dynamics in the pelagic central Benguela System inferred from the flux of carbonate and silicate organisms. Journal of Marine Systems, 37(4). 259-278. doi:10.1016/S0924-7963(02)00189-6

Hebbeln, D, Arntz, WE, Böning, P, Bohlmann, H, Contardo, X, Dezileau, L, Ferdelman, TG, Figueroa, S, Fleming, J, Gallardo, VA, Gerdes, D, Giglio, S, Gonzales, P, Gonzáles, R, Gutièrrez, D, Hayn, C, Kallmeyer, J, Klockgether, G, Lambers, K, Lamy, F, Langer, J, Lavik, G, Löbner, H, Marchant, M, Meyer-Schack, B, Mohtadi, M, Montiel, A, Niggemann, J, Quiroga, E, Romero, OE, Rondanelli, M, Scheurle, C, Schewe, F, Schneider, RR, Schubert, CJ, Sellanes, J, Serrano, W, Stregel, S, Teixidó, N, Toffin, L, Treude, T, Villa, R, Villagrán, C, Walpersdorf, E, Wintersteller, P and Wulf, J (2001) PUCK: Report and preliminary results of R/V Sonne Cruise SO156, Valparaiso (Chile) - Talcahuano (Chile). March 29 - May 14, 2001. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 182. Department of Geosciences, Bremen University. urn:nbn:de:gbv:46-ep000103106

Romero, OE, Hebbeln, D and Wefer, G (2001) Temporal and spatial variability in export production in the SE Pacific Ocean: evidence from siliceous plankton fluxes and surface sediment assemblages. Deep Sea Research Part I: Oceanographic Research Papers, 48(12). 2673-2697. doi:10.1016/S0967-0637(01)00037-1

Romero, OE (1998) Marine planktonic diatoms from the tropical and equatorial Atlantic: temporal flux patterns and the sediment record. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 122. Department of Geosciences, Bremen University. urn:nbn:de:gbv:46-ep000102411