Anna Noffke
Leibniz Institute of Marine Sciences
12 Papers
4 Citations
Anna Noffke is an academic researcher from Leibniz Institute of Marine Sciences. The author has contributed to research in topics: Oxygen minimum zone & Benthic zone. The author has an hindex of 9, co-authored 12 publications. Previous affiliations of Anna Noffke include Leibniz Institute for Neurobiology.
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Papers
Early diagenesis of redox-sensitive trace metals in the Peru upwelling area – response to ENSO-related oxygen fluctuations in the water column
TL;DR: In this article, the authors evaluate the respective mechanisms of trace metal accumulation, retention and remobilization across the oxygen minimum zone (OMZ) and with respect to oxygen fluctuations in the water column related to the El Nino Southern Oscillation (ENSO).
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Benthic iron and phosphorus fluxes across the Peruvian oxygen minimum zone
Anna Noffke,Christian Hensen,Stefan Sommer,Florian Scholz,Lisa Bohlen,Thomas Mosch,Michelle Graco,Klaus Wallmann +7 more
TL;DR: In this article, in situ benthic chamber incubations and pore-water profiles along a depth transect (11°S, 80-1000 m) across the Peruvian oxygen minimum zone (OMZ).
166
Benthic nitrogen cycling traversing the Peruvian oxygen minimum zone
Lisa Bohlen,Andrew W. Dale,Stefan Sommer,Thomas Mosch,Christian Hensen,Anna Noffke,Florian Scholz,Klaus Wallmann +7 more
TL;DR: In this paper, benthic nitrogen cycling was investigated at six stations along a transect traversing the Peruvian oxygen minimum zone (OMZ) at 11 °S. Simulated rates of nitrification, denitrification, anammox and dissimilatory nitrate reduction to ammonium (DNRA) by filamentous large sulfur bacteria (e.g. Beggiatoa and Thioploca) were highly variable throughout the OMZ yet clear trends were discernible.
107
On the isotope composition of reactive iron in marine sediments: Redox shuttle versus early diagenesis
Florian Scholz,Silke Severmann,James McManus,James McManus,Anna Noffke,Ulrike Lomnitz,Christian Hensen +6 more
TL;DR: In addition to cross-basinal Fe redistribution, Fe minerals also undergo diagenetic redistribution during burial, which does not affect the bulk isotope composition, but complicates the identification of mineral-specific isotope signatures as discussed by the authors.
63
Benthic phosphorus cycling in the Peruvian oxygen minimum zone
Ulrike Lomnitz,Stefan Sommer,Andrew W. Dale,Carolin R. Löscher,Anna Noffke,Klaus Wallmann,Christian Hensen +6 more
TL;DR: In this paper, a comprehensive field program in the Peruvian OMZ was undertaken to identify the sources of benthic P at six stations, including the analysis of particles from the water column, surface sediments, and pore fluids, as well as in situ benthicle flux measurements.