Article
Oceanography
Ajitha Cyriac, Helen E. Phillips, Nathaniel L. Bindoff, Huabin Mao, Ming Feng
Summary: This study investigates the spatiotemporal variability of turbulent mixing in the eastern south Indian Ocean. Elevated mixing is observed in the upper ocean, over bottom topography, and in mesoscale eddies. Cyclonic eddies contribute to turbulent mixing in the depth range of 500-1000 m, while anticyclonic eddies enhance mixing due to trapped near-inertial waves.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Geochemistry & Geophysics
Erik K. Fredrickson, Joan S. Gomberg, William S. D. Wilcock, Susan L. Hautala, Albert J. Hermann, H. Paul Johnson
Summary: In subduction zones, seafloor pressure data are used to monitor tectonic deformation, but they are also influenced by oceanographic circulation-generated pressures. This study evaluates correction methods for these pressures and tests their impact on predicting slow slip events. The results show that subtracting the first mode of the pressure records and using depth-dependent spatial coherence proxies significantly reduce errors and improve detectability. However, abrupt pressure changes during seasonal transitions and instrumental drift remain challenges for accurate detection.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Oceanography
Yuanlong Li, Yaru Guo, Yanan Zhu, Shoichiro Kido, Lei Zhang, Fan Wang
Summary: Prominent interannual-to-decadal variations in heat content and mesoscale eddy activity were observed in the southeast Indian Ocean from 1993 to 2020. The study identifies the strengthening of the Indonesian Throughflow and anomalous cyclonic winds as the key drivers of these variations. The increase in eddy kinetic energy in the Leeuwin Current system significantly influences the ocean heat content.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Meteorology & Atmospheric Sciences
Jilan Jiang, Tonghua Su, Yimin Liu, Guoxiong Wu, Wei Yu, Jinxiao Li
Summary: This study reveals the synergistic effects of midlatitude and tropical circulation on an extreme drought in Southeast China in August 2019, emphasizing the coupling and locking of two cyclones at different latitudes. The results further confirm the connection between the Tibetan Plateau and the western North Pacific with tropical convection and precipitation in Southeast China, and uncover the impact mechanisms of the North Atlantic tripole sea surface temperature anomaly pattern and the TP precipitation deficiency on precipitation in Northeast China.
JOURNAL OF CLIMATE
(2022)
Article
Biodiversity Conservation
Mads Peter Heide-Jorgensen, Philippine Chambault, Teunis Jansen, Caroline V. B. Gjelstrup, Aqqalu Rosing-Asvid, Andreas Macrander, Gisli Vikingsson, Xiangdong Zhang, Camilla S. S. Andresen, Brian R. R. MacKenzie
Summary: Two major oceanographic changes have occurred in the coastal areas of Southeast Greenland recently. Firstly, there has been a significant decrease in drift-ice exported from the Fram Strait and an increase in temperature of the East Greenland Current. Secondly, the warm Irminger Current has also become warmer. These changes have had cascading effects on the ecosystem, including changes in fish and cetacean populations, as well as a reduction in the abundance of narwhals and walruses.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Marine & Freshwater Biology
Eleonora de Sabata, Ernesto Napolitano, Roberto Iacono, Massimiliano Palma, Gianmaria Sannino, Andrea Bordone
Summary: This study presents long-term monitoring activities carried out by SCUBA divers inside the Gulf of Naples, focusing on sea temperature changes and their potential impacts on local ecosystems, as well as elements of oceanographic interest, such as temperature oscillations and the complex dynamics at play.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Lei Zhang, Jian Li, Minghu Ding, Jianping Guo, Lingen Bian, Qizhen Sun, Qinghua Yang, Tingfeng Dou, Wenqian Zhang, Biao Tian, Canggui Lu, Dongqi Zhang
Summary: Research shows that in the Arctic, low-level temperature inversions in summer occur mainly below 500 meters and are generally weaker and shallower compared to those in winter. Both local meteorology and large scale weather conditions can influence the formation of low-level inversions.
ATMOSPHERIC ENVIRONMENT
(2021)
Editorial Material
Multidisciplinary Sciences
Fernanda Avelar Santos, Virginia Gewin
Summary: Geologist Fernanda Avelar Santos has discovered a new type of pollution caused by fishing gear and packaging.
Article
Environmental Sciences
Etienne Joubert, Robin P. M. Gauff, Benoist de Vogue, Fabienne Chavanon, Christophe Ravel, Marc Bouchoucha
Summary: Port areas are under multiple anthropic pressures that directly affect marine communities and deprive them of essential ecological functions. The use of artificial fish nurseries (AFNs) in these areas has the potential to restore part of the nursery function of natural habitats by increasing fish and juvenile abundance and reducing predation intensity. Two years of monitoring showed that AFNs hosted significantly more fish and fish juveniles compared to control docks. The taxonomic diversity of fish was also higher in AFNs, and predation intensity was lower. AFNs may be an effective restoration tool, but further monitoring is needed to understand potential concentration effects.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Renzo Bruera, Jezabel Curbelo, Guillermo Garcia-Sanchez, Ana M. Mancho
Summary: This study explores 3D conveyor routes associated with the Atlantic Meridional Overturning Circulation (AMOC), using Lagrangian Coherent Structures. The findings reveal the geometry of mixing structures in the upper and deep ocean layers and identify regions linked to vertical transport, characterizing transport time scales. The study focuses on the Flemish Cap region and the Irminger Sea, uncovering rapid upward ascension of deep waters and a previously unreported upwelling connection between very deep waters and the ocean surface.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Oceanography
C. S. Jones, Ryan P. Abernathey
Summary: This study investigates the influences of vertical mixing and isopycnal mixing on deep-ocean water-mass distributions, using passive tracers in an idealized two-basin model. The research suggests that the strength and vertical profile of isopycnal mixing play a crucial role in determining deep-ocean tracer concentrations. The findings highlight the importance of considering both advective and diffusive processes in understanding the distribution of North Atlantic Water in the deep oceans.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Review
Geosciences, Multidisciplinary
Yuzhu Ge, David P. G. Bond
Summary: Marine redox conditions during the Permian-Triassic boundary interval in South China have been extensively studied, but interpretations have been inconsistent. This study summarizes and reevaluates previous research, proposing two deep marine oxygenation events during this interval. The first event occurred before and during the end-Permian mass extinction, while the second event occurred during the earliest Triassic. These events were influenced by factors such as paleogeography, climate changes, ocean circulation, and marine productivity.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Julia Liu, Ellyn Enderlin, Hans-Peter Marshall, Andre Khalil
Summary: Scientific attention has recently focused on estimating Greenland's dynamic mass loss, with a specific emphasis on its marine outlet glaciers. The study finds that dynamic mass loss for ice sheet outlet glaciers is highly sensitive to changes in climate and individual glacier geometry. However, dynamic mass loss for ice-sheet-independent marine glaciers around Greenland has been overlooked. Through the use of satellite imagery, the researchers were able to determine the highly detailed records of length changes for 135 peripheral marine glaciers in southeast Greenland. The observations revealed that these independent marine glaciers exhibited widespread, rapid, and synchronous response to increased meltwater input in 2016, suggesting they may be more sensitive to atmospheric warming than previously believed.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Kelly K. Hastings, Thomas S. Gelatt, John M. Maniscalco, Lauri A. Jemison, Rod Towell, Grey W. Pendleton, Devin S. Johnson
Summary: The North Pacific marine heatwave from 2014 to 2016 had widespread and persistent impacts on the Gulf of Alaska and California Current ecosystems, leading to reduced survival rates of Steller sea lions. The survival of adult females in the eastern areas was significantly lower during the heatwave, while the survival of Kodiak and Sugarloaf females was also affected. The response of Steller sea lions to the heatwave varied regionally.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Andrew D. Wickert, Carlie Williams, Lauren J. Gregoire, Kerry L. Callaghan, Ruza F. Ivanovic, Paul J. Valdes, Lael Vetter, Carrie E. Jennings
Summary: By developing a marine-calibrated chronology of southern Laurentide Ice Sheet position, it was found that climatic warming after the Last Glacial Maximum caused the ice to retreat and advance in cycles lasting about 2,000 years. It was proposed that the retreat of ice led to cooling of the northern hemisphere through weakening of the Atlantic Meridional Overturning Circulation (AMOC), which in turn triggered ice-sheet readvance and ultimately strengthened the AMOC, leading to warming of the northern hemisphere. This ice-climate interaction was initiated by synchronous warming and ice retreat around 18.7-17.6 ka and reached its peak during the Younger Dryas.
GEOPHYSICAL RESEARCH LETTERS
(2023)