Article
Oceanography
Renato M. Castelao, Michael S. Dinniman, Caitlin M. Amos, John M. Klinck, Patricia M. Medeiros
Summary: The Southern Ocean is characterized by high eddy activity and high POC content in summer, especially near Antarctica. Coastal water rich in POC is often trapped by nonlinear cyclonic eddies near the coast before being transported offshore. This leads to an enrichment of POC in offshore waters off the West Antarctic Peninsula.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Alice S. Ren, Daniel L. Rudnick
Summary: This study examines the across-shore propagation characteristics of subthermocline eddies (STEs) in the California Current System (CCS) using 13 years of sustained coastal glider measurements. The results show that anticyclonic STEs propagate with high salinity, high temperature, and low dissolved oxygen anomalies, indicating their role in transporting water masses from the coast to offshore. However, there is only weak correlation between STEs and sea surface height expression.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Yessica Vanessa Contreras-Pacheco, Sharon Z. Herzka, Gerardo Vallejo-Espinosa, Juan Carlos Herguera
Summary: Ocean eddies play a major role in mixing processes and the transport of various substances in the Gulf of Mexico (GoM). However, limited observations have been made on how these eddies affect the distribution of particulate organic carbon (POC) in the upper water column. This study presents the distribution patterns of POC in relation to mesoscale features in the deep-water region of the GoM during three oceanographic cruises.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Pierre Damien, Daniele Bianchi, Faycal Kessouri, James C. McWilliams
Summary: Eddies play a crucial role in shaping ocean dynamics and modulating biogeochemical transformation rates. The non-linear nature of nutrient uptake by phytoplankton and the compensation between mesoscale and submesoscale eddies significantly impact primary production and nutrient transport in the California Current System.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Oceanography
Mengmeng Li, Chongguang Pang, Xiaomei Yan, Linlin Zhang, Zhiliang Liu
Summary: Using innovative methods, this study investigates the climatological characteristics of interactions between eddies, low-frequency fluctuations, and the mean flow in the Agulhas Retroflection Current System. The results show that eddies are primarily generated by mixed barotropic and baroclinic instabilities, with barotropic instability contributing significantly more to the eddy kinetic energy than baroclinic instability. The study also reveals the important role of nonlocal transport in the energy source of the eddy field and the different contributions of forward and inverse kinetic energy cascades to the low-frequency variability.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Oceanography
Vasco Mueller, Oleg Melnichenko
Summary: The study reveals that the interannual variability and trends of eddy heat transport in the surface mixed layer of the Atlantic Ocean show distinct differences in the Northern Hemisphere along the path of the Gulf Stream and in the Southern Hemisphere near the Agulhas Retroflection and Argentine basin. On average, heat is diverged away from the subtropics towards the equator and higher latitudes due to meridional eddy heat transport.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Astrid Pacini, Robert S. Pickart, Isabela A. Le Bras, Fiammetta Straneo, N. Penny Holliday, Michael A. Spall
Summary: The boundary current system in the Labrador Sea plays a crucial role in regulating convection in the interior basin. Research has revealed persistent mesoscale variability in the West Greenland boundary current and identified intensified cyclones as the downstream manifestation of Denmark Strait Overflow Water (DSOW). Quantifying these cyclones has shown that they transport dense water and increase the transport of DSOW in the West Greenland boundary current.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Geosciences, Multidisciplinary
T. Radko, I Kamenkovich
Summary: This study investigates the impact of delayed adjustment of eddy-induced fluxes on parameterizations. By reinterpreting a principle from Maxwell's theory, the research finds that incorporating the delay effect can significantly improve the results of eddy parameterizations.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Zhendong Hu, Hongyang Lin, Zhiyu Liu, Zhiyong Cao, Fangtao Zhang, Zongpei Jiang, Yao Zhang, Kuanbo Zhou, Minhan Dai
Summary: In this study, an elaborate observation of a warm and fresh filament intruding into a cyclonic mesoscale eddy is reported. The filament originated from an anticyclonic eddy and its evolution was mainly due to the geostrophic flows associated with the eddy pair. The findings provide important insights into the dynamics and transport properties of oceanic submesoscale flows.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Oceanography
Qingye Wang, Xin Yuan, Dunxin Hu, Hideharu Sasaki
Summary: The study of intraseasonal variability in the Kuroshio east of Taiwan reveals complex dynamics influenced by various factors such as ocean eddies, surface eddies, and coastal cold water upwelling. Ocean eddies southeast of Taiwan have a significant impact on the intraseasonal variability in the Kuroshio.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Miguel A. Goni, Kylie A. Welch, Emmanuel Alegria, Yvan Alleau, Katie Watkins-Brandt, Angelicque E. White
Summary: Semi-automated sampling was used to study the distribution and composition of particulate organic matter in surface waters of the northern California Current ecosystem during winter, revealing differences in POC and Chl concentrations compared to summer. The results suggest that physical drivers such as wind, waves, and river discharge play a significant role in influencing the biogeochemistry of eastern boundary current systems during non-upwelling conditions.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Oceanography
Peter G. G. Strutton, Thomas W. W. Trull, Helen E. E. Phillips, Earl R. R. Duran, Sylvia Pump
Summary: Eddies in the southeast Indian Ocean play a role in modulating open ocean productivity, with their impact depending on their source and evolution. These eddies can stimulate and sustain phytoplankton, allowing their effects to persist over long distances. Measurements from autonomous floats show that chlorophyll and particulate organic carbon become concentrated at the base of the mixed layer as eddies are transported westward. The subsurface biomass maxima in both anticyclonic and cyclonic eddies remain active over several months, suggesting a mechanism for long-distance transfer of eddy plankton communities not captured by satellite remote sensing.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geosciences, Multidisciplinary
S. M. Hamze-Ziabari, A. M. Razmi, U. Lemmin, D. A. Barry
Summary: Submesoscale filaments have been found in Lake Geneva for the first time based on high-resolution 3D numerical simulations, field observations, and remote sensing imagery. These filaments are formed during summertime and have significant impacts on the biophysical processes in the lake.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Tongyu Wang, Shuwen Zhang, Fajin Chen, Luxing Xiao
Summary: This study investigates the impact of mesoscale eddies on surface and subsurface chlorophyll-a concentrations using remote sensing and Argo floats. It finds that cyclones and anticyclones induce positive and negative surface chlorophyll-a anomalies, respectively, through the lifting or deepening of isopycnals and nitrate. The vertical distributions and displacements of chlorophyll-a and subsurface chlorophyll-a maximum are associated with eddy pumping and convective mixing processes.
Article
Geosciences, Multidisciplinary
Junde Li, Moninya Roughan, Colette Kerry
Summary: The study found that the downstream eddy kinetic energy (EKE) in the Tasman EKE Box region of the East Australian Current (EAC) is modulated by the poleward transport of the EAC, with barotropic instabilities being the primary source of EKE. Anticyclonic eddies dominate during high-EKE periods, shedding from 33 degrees S-36 degrees S, while penetrating further south by about 2 degrees during low-EKE periods.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Oceanography
Renato M. Castelao, Michael S. Dinniman, Caitlin M. Amos, John M. Klinck, Patricia M. Medeiros
Summary: The Southern Ocean is characterized by high eddy activity and high POC content in summer, especially near Antarctica. Coastal water rich in POC is often trapped by nonlinear cyclonic eddies near the coast before being transported offshore. This leads to an enrichment of POC in offshore waters off the West Antarctic Peninsula.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Sudip Majumder, Renato M. Castelao, Caitlin M. Amos
Summary: The study reveals seasonal and interannual variability in freshwater content in the Labrador Sea, with a large influx of freshwater from the southwest coast of Greenland in August to October, circulating westward along isobaths under the control of large-scale circulation. Satellite observations of surface salinity compare well with in situ data, showing their potential for monitoring freshwater content in high latitudes despite limitations in cold water conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Caitlin M. Amos, Renato M. Castelao
Summary: Sea surface temperature fronts along the west coasts of North, Central, and South America have a significant impact on circulation dynamics and biological activity. Frontal activity decreases during El Nino events and increases during La Nina events.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)