Article
Geosciences, Multidisciplinary
Alessandro Tagliabue, Alastair J. M. Lough, Clement Vic, Vassil Roussenov, Jonathan Gula, Maeve C. Lohan, Joseph A. Resing, Richard G. Williams
Summary: The dispersal of dissolved iron from hydrothermal vents in the Trans-Atlantic-Geotraverse system is mainly controlled by physical processes and occurs predominantly in the colloidal phase. Fine-scale mixing near the seafloor and transport through fracture zones play important roles in the dispersal, leading to predominant westward dispersal away from the Mid-Atlantic ridge at a larger scale, while diapycnal mixing drives northward transport within the ridge axial valley. Coarse resolution ocean models often used to assess ocean iron cycling are not able to accurately reproduce the observed dispersal due to the omission of local topography and mixing.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
D. Konig, T. M. Conway, D. S. Hamilton, A. Tagliabue
Summary: This study uses a global ocean biogeochemical model with active Fe isotope cycling to investigate the impact of anthropogenic Fe sources on surface ocean dFe and δFe-56(diss). The results show that the response of dFe, δFe-56(diss), and primary productivity is variable and regulated by the biogeochemical regime, rather than following the footprint of atmospheric deposition. The study also finds that while δFe-56(diss) can trace anthropogenic input, its response is attenuated by fractionation during phytoplankton uptake, but amplified by other isotopically-light Fe sources.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geography, Physical
Anna Saupe, Johanna Schmidt, Jassin Petersen, Andre Bahr, Patrick Grunert
Summary: This study examines the distribution patterns and characteristics of benthic foraminiferal communities in high-latitude regions, including the Iceland Basin and Greenland. The results reveal four types of suspension-feeding species that inhabit different hydrodynamic environments. This research provides valuable insights into the biogeographic patterns of benthic foraminifera in high-latitude contourites.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Environmental Sciences
Eric P. Achterberg, Sebastian Steigenberger, Jessica K. Klar, Thomas J. Browning, Chris M. Marsay, Stuart C. Painter, Lucia H. Vieira, Alex R. Baker, Douglas S. Hamilton, Toste Tanhua, C. Mark Moore
Summary: This study presents dissolved and total dissolvable trace elements data from spring and summer cruises in 2010 in the high-latitude North Atlantic, assessing the impacts of biological uptake and volcanic inputs on element concentrations. The results show that deep winter mixing is a dominant source of elements, with atmospheric inputs being important for certain elements. Deep mixing dominating nutrient and trace element supply to surface waters may have consequences for primary production and the biological carbon pump in this region, especially if water column stratification increases as predicted.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Thomas J. Browning, Ali A. Al-Hashem, Eric P. Achterberg, Paloma C. Carvalho, Paulo Catry, Jason Matthiopoulos, Julie A. O. Miller, Ewan D. Wakefield
Summary: Nutrients supplied by seabird guano can enhance primary production in coastal and potentially open ocean ecosystems. This study investigated nutrient concentrations and release dynamics in guano collected from the North Atlantic, finding that guano is enriched in phosphorus, released as phosphate in solution, and also releases nitrogen in the form of ammonium and urea. Trace elements, including iron, were also released. Bioassays demonstrated that fresh guano can increase phytoplankton biomass and photochemical efficiencies in ambient seawater. Despite being a minor source of nutrients on annual scales in the surface North Atlantic, guano deposition could be highly important in late spring/summer, with phosphorus deposition estimates comparable to diffusion from deeper waters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
David Gonzalez-Santana, Alastair J. M. Lough, Helene Planquette, Geraldine Sarthou, Alessandro Tagliabue, Maeve C. Lohan
Summary: Hydrothermal vent sites along mid-ocean ridges are important sources of reduced chemical species and trace elements. A study found that the dissolved iron (II) (dFe(II)) concentrations ranged from 0.00 to 0.12 nmol L-1 in non-hydrothermally affected regions, and as high as 12.8 nmol L-1 within hydrothermal plumes. This suggests that dFe(II) plays a more significant role in the iron pool than previously thought.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Samuel C. Mogen, Nicole S. Lovenduski, Allysa R. Dallmann, Luke Gregor, Adrienne J. Sutton, Steven J. Bograd, Nathali Cordero Quiros, Emanuele Di Lorenzo, Elliott L. Hazen, Michael G. Jacox, Mercedes Pozo Buil, Stephen Yeager
Summary: This study characterizes the biogeochemical properties of the Eastern North Pacific upper ocean during the Winter of 2013-2014 using observations and models, and finds that the Blob is associated with increased aragonite saturation and decreased oxygen concentration.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Jae-Heung Park, Jong-Seong Kug, Young-Min Yang, Hyoeun Oh, Jiuwei Zhao, Yikai Wu
Summary: This study examined the impact of anomalous sea surface temperature in the north tropical Atlantic (NTA) on El Nino-Southern Oscillation (ENSO) and the diversity of this impact in climate models. The analysis found that the strength of NTA's effect on ENSO in the climate models was proportional to the intensity of the climatological subtropical North Pacific high system in boreal spring. The observed NTA effect on ENSO also became stronger during periods when the climatological subtropical North Pacific high intensified, indicating the importance of climatology in the NTA-ENSO connection.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Manuel Colombo, Birgit Rogalla, Jingxuan Li, Susan E. Allen, Kristin J. Orians, Maria T. Maldonado
Summary: Research shows that the Canadian Arctic Archipelago region's sediment resuspension and sediment-water interactions result in the enrichment of iron in water bodies, which are then transported to Baffin Bay, providing crucial support for primary production and nitrogen fixation in the region and beyond.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
D. Konig, T. M. Conway, M. J. Ellwood, W. B. Homoky, A. Tagliabue
Summary: Iron isotopes in the ocean are crucial in studying the iron cycle, but the complexity of various external sources and fractionation processes can complicate the interpretation of observations. By incorporating iron isotopes into a global ocean biogeochemical model, research finds that distinct external source endmembers and isotopic fractionation are essential for explaining the distribution of dissolved iron isotopes, with the water column's δFe-56(diss) distribution influenced by regional imbalance of remineralization and abiotic removal processes.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Marine & Freshwater Biology
Johan van der Molen, Johannes Patsch
Summary: This paper provides an overview of the Atlantic forcing on the hydro- and biogeochemical dynamics of the North Sea. The North Atlantic Oscillation (NAO) and zonal shifts in the position of the subpolar front (SPF) have significant impacts on the oceanic settings and biogeochemistry of the northern and central North Sea. Climate change is expected to reinforce some forcing mechanisms while potentially reducing others.
JOURNAL OF SEA RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Trevor T. Bringloe, Antoine Fort, Masami Inaba, Ronan Sulpice, Cliodhna Ni Ghriofa, Agnes Mols-Mortensen, Karen Filbee-Dexter, Christophe Vieira, Hiroshi Kawai, Takeaki Hanyuda, Dorte Krause-Jensen, Birgit Olesen, Samuel Starko, Heroen Verbruggen
Summary: This study used genome sequencing to investigate the survival of kelp populations during the Last Glacial Maximum. The results provide strong evidence that these populations were resilient to past climatic fluctuations and potentially adapted to local conditions.
Article
Environmental Sciences
Thomas J. Bracegirdle, Hua Lu, Jon Robson
Summary: Climate model biases in the North Atlantic low-level tropospheric westerly jet remain present in CMIP6 models, although reduced compared to CMIP5. The equatorward bias is mainly associated with a weaker-than-observed frequency of poleward excursions of the jet to its northern position. CMIP models with larger equatorward jet biases exhibit weaker correlations between temporal variability in speed of the jet and sea surface conditions over the sub-polar gyre region. The early-winter equatorward bias in jet latitude in CMIP models could partially explain other known biases, such as the weaker-than-observed seasonal-decadal predictability of the NA climate system.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
D. S. Dukhovskoy, I. Yashayaev, E. P. Chassignet, P. G. Myers, G. Platov, A. Proshutinsky
Summary: The impact of increasing Greenland freshwater discharge on the subpolar North Atlantic requires decades to adjust, with long-lasting freshwater discharge leading to a non-steady-state response in the region.
JOURNAL OF CLIMATE
(2021)
Article
Engineering, Environmental
Ronald A. Glabonjat, Georg Raber, Henry C. Holm, Benjamin A. S. Van Mooy, Kevin A. Francesconi
Summary: The study found arsenolipids in 61 plankton samples with varying levels of nutrients in the North Atlantic Ocean. The relative amounts of six identified arsenolipids in the samples showed a clear dependence on the nutrient status of the surrounding water. By combining field data with global phytoplankton productivity, it is estimated that oceans' phytoplankton convert 50,000-100,000 tons of arsenic into arsenolipids annually.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Eric P. Achterberg, Sebastian Steigenberger, Jessica K. Klar, Thomas J. Browning, Chris M. Marsay, Stuart C. Painter, Lucia H. Vieira, Alex R. Baker, Douglas S. Hamilton, Toste Tanhua, C. Mark Moore
Summary: This study presents dissolved and total dissolvable trace elements data from spring and summer cruises in 2010 in the high-latitude North Atlantic, assessing the impacts of biological uptake and volcanic inputs on element concentrations. The results show that deep winter mixing is a dominant source of elements, with atmospheric inputs being important for certain elements. Deep mixing dominating nutrient and trace element supply to surface waters may have consequences for primary production and the biological carbon pump in this region, especially if water column stratification increases as predicted.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Oceanography
Stuart C. Painter, Baraka Sekadende, Angelina Michael, Margaux Noyon, Salome Shayo, Brian Godfrey, Mtumwa Mwadini, Margareth Kyewalyanga
Summary: Oceanographic and biogeochemical observations in Pemba Channel during the South East monsoon show active upwelling, indicating N-limitation and susceptibility to anthropogenic N inputs. Despite only a 20% increase in local productivity, the response to upwelling is mainly influenced by picoplankton dominance in the phytoplankton community.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Environmental Sciences
E. Elena Garcia-Martin, Richard Sanders, Chris D. Evans, Vassilis Kitidis, Dan J. Lapworth, Andrew P. Rees, Bryan M. Spears, Andy Tye, Jennifer L. Williamson, Chris Balfour, Mike Best, Michael Bowes, Sarah Breimann, Ian J. Brown, Annette Burden, Nathan Callaghan, Stacey L. Felgate, James Fishwick, Mike Fraser, Stuart W. Gibb, Pete J. Gilbert, Nina Godsell, Africa P. Gomez-Castillo, Geoff Hargreaves, Oban Jones, Paul Kennedy, Anna Lichtschlag, Adrian Martin, Rebecca May, Edward Mawji, Ian Mounteney, Philip D. Nightingale, Justyna P. Olszewska, Stuart C. Painter, Christopher R. Pearce, M. Gloria Pereira, Kate Peel, Amy Pickard, John A. Stephens, Mark Stinchcombe, Peter Williams, E. Malcolm S. Woodward, Deborah Yarrow, Daniel J. Mayor
Summary: The research demonstrates that the fate of organic carbon in estuaries is strongly influenced by land use, with different land use types affecting the composition and flow of dissolved organic matter (DOM).
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Ecology
E. Cerdan-Garcia, A. Baylay, D. Polyviou, E. M. S. Woodward, L. Wrightson, C. Mahaffey, M. C. Lohan, C. M. Moore, T. S. Bibby, J. C. Robidart
Summary: The study demonstrates how Trichodesmium acclimates to resource availability by upregulating iron-stress biomarker genes with decreasing Fe availability and upregulating genes involved in the acquisition of diverse P sources with decreasing P availability. Enhanced N-2 fixation within the Fe and P co-stressed transition region was associated with a distinct metabolic profile, suggesting unique physiological responses to exploit the Fe and P co-limited niche.
Article
Oceanography
Stuart C. Painter, Ekaterina Popova, Michael J. Roberts
Summary: East African marine waters, particularly those impacted by the East African Coastal Current, face challenges of data sparsity and food security, requiring improved knowledge for decision-making.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Juan Carlos Gomez Martin, Alfonso Saiz-Lopez, Carlos A. Cuevas, Alex R. Baker, Rafael P. Fernandez
Summary: We have compiled and analyzed a comprehensive data set of field observations of iodine speciation in marine aerosol. The soluble iodine content in fine aerosol is mainly composed of soluble organic iodine and iodide, while the coarse fraction is predominantly iodate. SOI fraction shows an equatorial maximum and minima coinciding with the ocean deserts, indicating a link between soluble iodine speciation in aerosol and ocean productivity. Among major aerosol ions, organic anions and non-sea-salt sulfates are positively correlated with SOI in fine aerosol. Alkali cations are positively correlated with iodate and negatively correlated with SOI and iodide in coarse aerosol.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Plant Sciences
Alejandro Torrado, Hannah M. Connabeer, Annika Rottig, Nicola Pratt, Alison J. Baylay, Matthew J. Terry, C. Mark Moore, Thomas S. Bibby
Summary: Photosynthesis can be engineered by manipulating both natural and artificial electron sinks. In this study, the activity of Cytochrome P450 enzyme CYP1A1 was enhanced by removing a competing electron sink and increasing the electron flux through Photosystem I. Transcriptomic analysis revealed complex cellular responses to rational engineering, including changes in gene expression related to respiration and photosynthesis.
Review
Geochemistry & Geophysics
David Crisp, Han Dolman, Toste Tanhua, Galen A. McKinley, Judith Hauck, Ana Bastos, Stephen Sitch, Simon Eggleston, Valentin Aich
Summary: Fossil fuel combustion, land use change, and other human activities have increased atmospheric CO2 levels by 50% since the industrial age. Natural sinks in the ocean and on land have helped remove over half of this anthropogenic CO2. However, the dynamics of the land carbon cycle vary regionally.
REVIEWS OF GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
Hollie Packman, Susan H. Little, Alex R. Baker, Luke Bridgestock, Rosie J. Chance, Barry J. Coles, Katharina Kreissig, Mark Rehkaemper, Tina van de Flierdt
Summary: Anthropogenic activities have increased the input of metals into the ocean, affecting marine ecosystems. This study shows that Zn and Cu isotopes can distinguish between natural and anthropogenic atmospheric inputs. Analysis of aerosols collected from the eastern tropical Atlantic Ocean reveals a significant anthropogenic component, indicating the potential of Zn isotopes to track anthropogenic sources of atmospheric Zn to the surface ocean.
Article
Environmental Sciences
To Thi Hien, Nguyen Doan Thien Chi, Duong Huu Huy, Hoang Anh Le, David E. Oram, Grant L. Forster, Graham P. Mills, Alex R. Baker
Summary: Hanoi and Ho Chi Minh City have high levels of soluble trace metals in PM2, with zinc being the most abundant. Hanoi generally has higher concentrations of trace metals, especially toxic ones, compared to HCM. Metals like V and Ni have higher concentrations in HCM, possibly due to emissions from shipping.
ATMOSPHERIC ENVIRONMENT-X
(2022)
Article
Oceanography
Joanna Ainsworth, Alex J. Poulton, Maeve C. Lohan, Mark C. Stinchcombe, Alastair J. M. Lough, Mark Moore
Summary: The Southern Ocean is a large HNLC region where iron limits phytoplankton growth and productivity. Island wakes can mix iron into surface waters, leading to large phytoplankton blooms. The interaction between iron and phytoplankton is reciprocal in blooms, with plankton regulating the cycling of iron. Observations and experiments were conducted to investigate iron limitation and remineralization in a November 2017 bloom downstream of South Georgia. The results showed that surface phytoplankton were iron limited, and iron remineralization mainly occurred through rapid release of adsorbed iron.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2023)
Article
Multidisciplinary Sciences
Thomas J. Browning, Mak A. Saito, Shungudzemwoyo P. Garaba, Xuechao Wang, Eric P. Achterberg, C. Mark Moore, Anja Engel, Matthew R. Mcllvin, Dawn Moran, Daniela Voss, Oliver Zielinski, Alessandro Tagliabue
Summary: The impact of climate change on ocean net primary productivity is highly uncertain, with phytoplankton nutrient limitation in the low-latitude Pacific Ocean playing a crucial role, but poorly constrained by observations. We found that changes in physical forcing resulted in consistent fluctuations in the strength of equatorial Pacific iron limitation through El Nino/Southern Oscillation (ENSO) cycles, which were overestimated by a state-of-the-art climate model. Our assessment provides a powerful approach for evaluating the realism of model projections of net primary productivity to climate changes.
Article
Multidisciplinary Sciences
Neil J. Wyatt, Antony Birchill, Simon Ussher, Angela Milne, Heather A. Bouman, Elizabeth Shoenfelt Troein, Katsiaryna Pabortsava, Alan Wright, Oliver Flanagan, Thomas S. Bibby, Adrian Martin, C. Mark Moore
Summary: The seasonal availability of light and micronutrients strongly regulates productivity in the Southern Ocean. Dust-borne iron plays a key role in the biogeochemistry of the Southern Ocean, and manganese availability is also emerging as an important factor. Further research is needed to understand the relative importance of iron and manganese limitation in controlling Southern Ocean productivity.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Geosciences, Multidisciplinary
Siv K. Lauvset, Nico Lange, Toste Tanhua, Henry C. Bittig, Are Olsen, Alex Kozyr, Simone Alin, Marta Alvarez, Kumiko Azetsu-Scott, Leticia Barbero, Susan Becker, Peter J. Brown, Brendan R. Carter, Leticia Cotrim da Cunha, Richard A. Feely, Mario Hoppema, Matthew P. Humphreys, Masao Ishii, Emil Jeansson, Li-Qing Jiang, Steve D. Jones, Claire Lo Monaco, Akihiko Murata, Jens Daniel Muller, Fiz F. Perez, Benjamin Pfeil, Carsten Schirnick, Reiner Steinfeldt, Toru Suzuki, Bronte Tilbrook, Adam Ulfsbo, Anton Velo, Ryan J. Woosley, Robert M. Key
Summary: The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort that compiles ocean biogeochemical bottle data, with a focus on seawater inorganic carbon chemistry. GLODAPv2.2022 is an update of the previous version, adding data from 96 new cruises and performing secondary quality control on SF6 data. It includes measurements from almost 1.4 million water samples collected on 1085 cruises.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Deonie Allen, Steve Allen, Sajjad Abbasi, Alex Baker, Melanie Bergmann, Janice Brahney, Tim Butler, Robert A. Duce, Sabine Eckhardt, Nikolaos Evangeliou, Tim Jickells, Maria Kanakidou, Peter Kershaw, Paolo Laj, Joseph Levermore, Daoji Li, Peter Liss, Kai Liu, Natalie Mahowald, Pere Masque, Dusan Materic, Andrew G. Mayes, Paul McGinnity, Iolanda Osvath, Kimberly A. Prather, Joseph M. Prospero, Laura E. Revell, Sylvia G. Sander, Won Joon Shim, Jonathan Slade, Ariel Stein, Oksana Tarasova, Stephanie Wright
Summary: The study analyzes the processes and fluxes of the marine-atmospheric micro(nano)plastic cycle and highlights the limited observations. A global observation strategy for marine-atmospheric micro(nano)plastics is proposed to address the uncertainties and knowledge gaps.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)