Article
Environmental Sciences
Eurico J. D'Sa, Hyun-Cheol Kim, Sun-Yong Ha, Ishan Joshi
Summary: The Ross Sea in the Southern Ocean is a highly productive region that plays a significant role in deep water formation and carbon cycling. The study of dissolved organic carbon (DOC) concentrations and chromophoric dissolved organic matter (CDOM) absorption and fluorescence properties during the austral summer revealed regional differences in CDOM characteristics, indicating the influence of marine productivity on optical properties of organic matter.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Astronomy & Astrophysics
Kyle Juetten, Angela L. Strecker, Aaron Harrison, Zachary Landram, Warren J. De Bruyn, Catherine D. Clark
Summary: The study found that dissolved organic matter (DOM) in lakes is highly influenced by topography, climate, vegetation coverage, land use, and lake properties. In terms of elevation, higher lakes had lower levels of dissolved organic carbon (DOC) and absorbance. These lakes had higher forest cover and less wetlands in their watershed, as well as lower nutrient levels, water temperatures, and chlorophyll a content. Spectroscopy analysis also revealed different types of dissolved organic matter components, with most lakes being dominated by terrestrial material. Lower elevation lakes had more aromatic humic CDOM, while higher elevation lakes had a higher contribution of protein-like components.
EARTH AND SPACE SCIENCE
(2022)
Article
Oceanography
Colin A. Stedmon, Rainer M. W. Amon, Dorothea Bauch, Astrid Bracher, Rafael Goncalves-Araujo, Mario Hoppmann, Richard Krishfield, Samuel Laney, Benjamin Rabe, Heather Reader, Mats A. Granskog
Summary: This study highlights the potential of dissolved organic matter (DOM) as a tracer in the Arctic Ocean, particularly in the halocline layer. By measuring the fluorescence levels of DOM, distinct contributions from different sources can be distinguished and help evaluate ocean circulation patterns.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Environmental Sciences
L. G. De Stefano, A. Sanchez Valdivia, D. Gianello, M. Gerea, M. Reissig, P. E. Garcia, R. D. Garcia, C. Soto Cardenas, M. C. Dieguez, C. P. Queimalinos, G. L. Perez
Summary: For the past twenty years, lacustrine dissolved organic matter (DOM) has been a focus in various scientific disciplines due to its significance in carbon biogeochemistry and ecosystem functioning. The development of new satellites now allows for the evaluation of chromophoric dissolved organic matter (CDOM) in inland waters, which provides the opportunity to estimate DOM at appropriate spatiotemporal scales. This study evaluates the use of CDOM as a proxy for dissolved organic carbon (DOC) in seven Andean Patagonian lakes, and explores the relationship between CDOM absorption coefficients and DOC. The findings suggest that incorporating CDOM spectral shape information improves the estimation of DOC and has significant implications for environmental management, biogeochemical studies, and future remote sensing applications.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Benjamin Jacob, Emil Stanev
Summary: The study analyzed the hydrodynamic response to morphodynamic changes in the coastal areas of the German Bight via numerical experiments. The results showed continuous migration of tidal channels, complex changes in tidal flat depths, and sensitivity of tidal asymmetry and salinity to bathymetric changes.
FRONTIERS IN MARINE SCIENCE
(2021)
Review
Marine & Freshwater Biology
Carl Christian Kinze, Richard Czeck, Helena Herr, Ursula Siebert
Summary: This review examines the occurrence of 19 cetacean species along the German North Sea coastline and lower reaches of major rivers discharging into the region from 1604 to 2017. The harbour porpoise is identified as the most abundant native species, with records of an additional 18 species also documented. This study corrects past misidentifications and recovers lost records of certain whale species.
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2021)
Article
Geochemistry & Geophysics
Konrad Baerfuss, Bughsin Djath, Astrid Lampert, Johannes Schulz-Stellenfleth
Summary: Sea surface measurements are mainly conducted using satellite altimeters, buoys, and platforms. To overcome limitations in spatial resolution and coverage, LiDAR measurements can be used to validate and improve wave models in complex coastal areas, providing a detailed picture of the sea surface.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Meteorology & Atmospheric Sciences
Daniel Krieger, Oliver Krueger, Frauke Feser, Ralf Weisse, Birger Tinz, Hans von Storch
Summary: This study investigates the evolution of German Bight storminess from 1897 to 2018 by analyzing upper quantiles of geostrophic wind speeds. The results show that storm activity is subject to multidecadal variability and positively correlates with storminess in the NE Atlantic. The methodology used allows for the construction of robust, long-term storminess time series.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
A. Harjung, J. Schweichhart, G. Rasch, C. Griebler
Summary: This study examined the properties of dissolved organic matter (DOM) in terrestrial groundwater on a large scale, considering surface characteristics, aquifer characteristics, and microbial features. The results showed that DOM fluorescence components in groundwater are similar to those found in other studies, with associations to land use and nitrate concentrations. Clusters with higher bacterial abundance were correlated to high-molecular weight and humic components, indicating a surface origin for suspended bacteria. The study suggests that DOM fluorescence can be used as a fast monitoring tool to identify groundwater aquifers under anthropogenic stress and delineate sensitive recharge areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Limnology
Luciana Pena Mello Brandao, Peter Anton Staehr, Ludmila Silva Brighenti, Daniel Peifer, Francisco Antonio Rodrigues Barbosa, Jose Fernandes Bezerra-Neto
Summary: The study reveals spatial and temporal variations of dissolved organic matter in a tropical lake, with rainfall being a significant influencing factor. The morphology and geometry of contributing drainage areas impact different parts of the lake, resulting in spatial differences in DOM quantity and quality.
Article
Geosciences, Multidisciplinary
Rafael Goncalves-Araujo, Mats A. Granskog, Christopher L. Osburn, Piotr Kowalczuk, Colin A. Stedmon
Summary: This study presents a simple and feasible method for estimating DOC concentrations in Arctic waters using CDOM absorption spectroscopy. The algorithm accurately reproduces DOC profiles and mixing plots at different locations, capturing the DOC concentration gradient between Arctic riverine and marine systems.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Review
Environmental Sciences
Oliver Zielinski, Daniela Pieck, Jan Schulz, Claudia Thoelen, Jochen Wollschlaeger, Michelle Albinus, Thomas H. Badewien, Axel Braun, Bert Engelen, Christoph Feenders, Swaantje Fock, Carola Lehners, Kertu Lohmus, Andrea Luebben, Gudrun Massmann, Jens Meyerjuergens, Helmo Nicolai, Thomas Pollmann, Kai Schwalfenberg, Jana Stone, Hannelore Waska, Holger Winkler
Summary: Coastal observatories play a crucial role in enhancing the understanding of processes within the coastal area and their interactions with regional and global environmental changes. The Spiekeroog Coastal Observatory, located in the Wadden Sea, enables interdisciplinary research on land-sea interactions. It provides valuable support to education, industry, government, and environmental conservation efforts. Collaboration and ongoing maintenance of the observatory are essential for its sustained success.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Robert Hagen, Andreas Pluess, Romina Ihde, Janina Freund, Norman Dreier, Edgar Nehlsen, Nico Schrage, Peter Froehle, Frank Koesters
Summary: Marine spatial planning requires reliable data for coastal structures, research, or sea level rise adaptation. A comprehensive marine data collection has been established for the German Bight, providing information on bathymetry, salinity, waves, and more at high temporal and spatial resolution. This integrated data supports stakeholders in science, government, and the economy for various purposes such as coastal modeling and habitat preservation.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Engineering, Marine
Timoci Koliyavu, Chloe Martias, Awnesh Singh, Stephane Mounier, Philippe Gerard, Cecile Dupouy
Summary: Heavy rain events were found to impact the biogeochemical outflows and ecosystem health in the coastal waters of small Pacific Islands. Analysis revealed higher values of most components (along with most tested variables) at the southwest coast during the wet season, consistent with surface currents outflow. Additionally, the positive correlation of dissolved organic carbon (DOC) with nutrients suggests the utilization of DOM as an energy source.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Environmental
Michael Edgar, Treavor H. Boyer
Summary: The study found that ion exchange is an effective method for removing DOM in water treatment processes, with chemically regenerated columns achieving higher DOC removal rates. It also demonstrated that biological activity has minimal impact on DOC removal, with the main removal mechanism being secondary ion exchange.
Article
Marine & Freshwater Biology
Lisa Ronspiess, Olaf Dellwig, Xaver Lange, Guenther Nausch, Detlef Schulz-Bull
ESTUARINE COASTAL AND SHELF SCIENCE
(2020)
Article
Geochemistry & Geophysics
A. Brueske, S. Weyer, M-Y Zhao, N. J. Planavsky, A. Wegwerth, N. Neubert, O. Dellwig, K. Lau, T. W. Lyons
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Environmental Sciences
Fangli Wu, Halina Falfushynska, Olaf Dellwig, Helen Piontkivska, Inna M. Sokolova
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Fangli Wu, Eugene P. Sokolov, Olaf Dellwig, Inna M. Sokolova
Summary: Exposure to zinc oxide nanoparticles (nZnO) had significant effects on carbohydrate levels and electron transport system activity in blue mussels. Moderate winter warming may partially compensate for the bioenergetics stress caused by nZnO toxicity, while summer warming led to decreases in lipid and carbohydrate levels.
Article
Geosciences, Multidisciplinary
Antje Wegwerth, Jerome Kaiser, Olaf Dellwig, Helge W. Arz
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Melanie Beck, Olaf Dellwig, Bernhard Schnetger, Thomas Riedel, Hans-Juergen Brumsack
Article
Environmental Sciences
Grzegorz Scholtysik, Olaf Dellwig, Patricia Roeser, Helge Wolfgang Arz, Peter Casper, Christiane Herzog, Tobias Goldhammer, Michael Hupfer
Article
Multidisciplinary Sciences
Florian Kurzweil, Corey Archer, Martin Wille, Ronny Schoenberg, Carsten Munker, Olaf Dellwig
Summary: The isotope composition of tungsten can trace the rise of oceanic oxygen on early Earth. Experimental studies show that manganese oxides preferentially scavenge light tungsten isotopes, increasing the surrounding seawater's ?186/184W, while redissolution decreases it. The heavy stable tungsten isotope signature in open ocean seawater reflects predominantly fully oxic conditions in modern oceans.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geography, Physical
Carla K. M. Nantke, Achim Brauer, Patrick J. Frings, Markus Czymzik, Thomas Huebener, Johanna Stadmark, Olaf Dellwig, Patricia Roeser, Daniel J. Conley
Summary: The study demonstrates that variations in silicon isotopes in varved lake sediments are related to changes in vegetation cover, soil disturbance, and human activities. Early deforestation led to increased export of isotopically light dissolved silica to the lake, as cultivation intensified, burial flux of biogenic silica in lake sediments increased due to enhanced nutrient supply from the watershed.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Oceanography
Olaf Dellwig, Antje Wegwerth, Helge W. Arz
Summary: The study found that Major Baltic Inflows have a limited impact on the water column P inventory and eutrophication level of the Gotland Basin, as insufficient Fe availability prevents efficient trapping of phosphate. The fast recovery of reducing conditions only allows short-term storage of Mn-Fe-P mineral phases in the surface sediment. Trace metals such as V and W show intermittent depletion in the water column, but are released back into the water column due to re-establishing reducing conditions.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Engineering, Environmental
Mu Lin, Jixin Qiao, Xiaolin Hou, Olaf Dellwig, Peter Steier, Karin Hain, Robin Golser, Liuchao Zhu
Summary: The Baltic Sea, with its strongly stratified water structure and densely populated catchment, is one of the most polluted seas. Understanding its circulation pattern and time scale is crucial for predicting ecological issues. Research has shown that anthropogenic U-236 and U-233 are useful tracers in oceanic studies, but their application in the Baltic Sea is limited by unclear input history and inadequate monitoring records.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Lucile Roue, Florian Kurzweil, Martin Wille, Antje Wegwerth, Olaf Dellwig, Carsten Munker, Ronny Schoenberg
Summary: The study explores the potential of stable W isotopes as a paleoredox proxy, with an analysis of Precambrian igneous rocks and modern Black Sea sediments to validate its applicability. Results indicate that the δW-186/184 values of black shales can help distinguish between different depositional environments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Environmental Sciences
Duy Nghia Pham, Julie Angelina Kopplin, Olaf Dellwig, Eugene P. Sokolova, Inna M. Sokolova
Summary: Sediment contamination and seawater warming are two major stressors for estuary benthos. This study investigated the combined effects of metal-contaminated sediment and increased temperature on an estuarine polychaete, Hediste diversicolor. The results showed that the combined effects were mostly additive, with copper being a weak stressor and warming a more potent stressor. This study highlights the importance of energy-related biomarkers and the search for more conserved molecular markers to assess metal exposure in H. diversicolor.
ENVIRONMENTAL POLLUTION
(2023)
Article
Multidisciplinary Sciences
Markus Czymzik, Norbert R. Nowaczyk, Olaf Dellwig, Antje Wegwerth, Raimund Muscheler, Marcus Christl, Helge W. Arz
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Geosciences, Multidisciplinary
Elizabeth Atar, Christian Marz, Andrew C. Aplin, Olaf Dellwig, Liam G. Herringshaw, Violaine Lamoureux-Var, Melanie J. Leng, Bernhard Schnetger, Thomas Wagner
CLIMATE OF THE PAST
(2019)
