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Niels van Helmond
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Cretaceous sea-surface temperature evolution: Constraints from TEX86 and planktonic foraminiferal oxygen isotopes
CL O'Brien, SA Robinson, RD Pancost, JSS Damsté, S Schouten, DJ Lunt, ...
Earth-Science Reviews 172, 224-247, 2017
5182017
A perturbed hydrological cycle during Oceanic Anoxic Event 2
NAGM van Helmond, A Sluijs, GJ Reichart, JS Sinninghe Damsté, ...
Geology 42 (2), 123-126, 2014
1292014
Iron oxide reduction in methane-rich deep Baltic Sea sediments
M Egger, M Hagens, CJ Sapart, N Dijkstra, NAGM van Helmond, ...
Geochimica et Cosmochimica Acta 207, 256-276, 2017
1092017
Ocean circulation in the Toarcian (Early Jurassic): a key control on deoxygenation and carbon burial on the European Shelf
I Ruvalcaba Baroni, A Pohl, NAGM van Helmond, NM Papadomanolaki, ...
Paleoceanography and Paleoclimatology 33 (9), 994-1012, 2018
862018
Abundance and Biogeochemical Impact of Cable Bacteria in Baltic Sea Sediments
M Hermans, W Lenstra, S Hidalgo-Martinez, NAGM van Helmond, ...
Environmental science & technology 53 (13), 7494-7503, 2019
642019
Freshwater discharge controlled deposition of Cenomanian–Turonian black shales on the NW European epicontinental shelf (Wunstorf, northern Germany)
NAGM van Helmond, A Sluijs, JS Sinninghe Damsté, GJ Reichart, S Voigt, ...
Climate of the Past 11 (3), 495-508, 2015
592015
The shelf-to-basin iron shuttle in the Black Sea revisited
WK Lenstra, M Hermans, MJM Séguret, R Witbaard, T Behrends, ...
Chemical Geology 511, 314-341, 2019
572019
Large variations in iron input to an oligotrophic Baltic Sea estuary: impact on sedimentary phosphorus burial
WK Lenstra, M Egger, NAGM Van Helmond, E Kritzberg, DJ Conley, ...
Biogeosciences 15 (22), 6979-6996, 2018
572018
Long-distance oak supply in mid-2nd century AD revealed: the case of a Roman harbour (Voorburg-Arentsburg) in the Netherlands
M Domínguez-Delmás, M Driessen, I García-González, ...
Journal of Archaeological Science 41, 642-654, 2014
542014
Impact of natural re-oxygenation on the sediment dynamics of manganese, iron and phosphorus in a euxinic Baltic Sea basin
M Hermans, WK Lenstra, NAGM van Helmond, T Behrends, M Egger, ...
Geochimica et Cosmochimica Acta 246, 174-196, 2019
532019
Spatial extent and degree of oxygen depletion in the deep proto‐North Atlantic basin during Oceanic Anoxic Event 2
NAGM van Helmond, I Ruvalcaba Baroni, A Sluijs, JS Sinninghe Damsté, ...
Geochemistry, Geophysics, Geosystems 15 (11), 4254-4266, 2014
532014
Equatorward phytoplankton migration during a cold spell within the Late Cretaceous super-greenhouse
NAGM van Helmond, A Sluijs, NM Papadomanolaki, AG Plint, DR Gröcke, MA ...
Biogeosciences 13 (9), 2859-2872, 2016
502016
Microbial community composition and functional potential in Bothnian Sea sediments is linked to Fe and S dynamics and the quality of organic matter
O Rasigraf, NAGM van Helmond, J Frank, WK Lenstra, M Egger, ...
Limnology and oceanography 65, S113-S133, 2020
49*2020
Unraveling the mineralogical complexity of sediment iron speciation using sequential extractions
SP Slotznick, EA Sperling, NJ Tosca, AJ Miller, K Clayton, NAGM van Helmond ...
Geochemistry, Geophysics, Geosystems 21 (2), e2019GC008666, 2020
482020
Removal of phosphorus and nitrogen in sediments of the eutrophic Stockholm archipelago, Baltic Sea
NAGM van Helmond, EK Robertson, DJ Conley, M Hermans, C Humborg, ...
Biogeosciences 17 (10), 2745-2766, 2020
46*2020
Hypoxia in the Holocene Baltic Sea: Comparing modern versus past intervals using sedimentary trace metals
NAGM Van Helmond, T Jilbert, CP Slomp
Chemical Geology 493, 478-490, 2018
442018
Shelf hypoxia in response to global warming after the Cretaceous-Paleogene boundary impact
J Vellekoop, L Woelders, NAGM van Helmond, S Galeotti, J Smit, ...
Geology 46 (8), 683-686, 2018
402018
Marine productivity leads organic matter preservation in sapropel S1: palynological evidence from a core east of the Nile River outflow
NAGM van Helmond, R Hennekam, TH Donders, FPM Bunnik, ...
Quaternary Science Reviews 108, 130-138, 2015
392015
Effects of redox variability and early diagenesis on marine sedimentary Hg records
J Frieling, TA Mather, C März, HC Jenkyns, R Hennekam, GJ Reichart, ...
Geochimica et Cosmochimica Acta 351, 78-95, 2023
352023
Biogeochemistry of the North Atlantic during oceanic anoxic event 2: role of changes in ocean circulation and phosphorus input
I Ruvalcaba Baroni, RPM Topper, NAGM van Helmond, H Brinkhuis, ...
Biogeosciences 11 (4), 977-993, 2014
352014
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