Article
Environmental Sciences
Gonzalo S. Saldias, Wilber Hernandez, Carlos Lara, Richard Munoz, Cristian Rojas, Sebastian Vasquez, Ivan Perez-Santos, Luis Soto-Mardones
Summary: Surface oceanic fronts, particularly Sea Surface Temperature (SST) fronts, in the northern Patagonia region were analyzed for the period 2003-2019. The study found high probability of frontal occurrences off Chiloe Island, especially in summer and fall, with increased gradient magnitudes primarily in the spring and summer, suggesting the formation of coastal upwelling fronts. Additionally, the analysis revealed dominant variability modes in SST gradient magnitudes, with meridional coastal fronts dominating in summer and SST fronts inside the Inner Sea of Chiloe dominating in spring and early summer. Future research is recommended to focus on studying the vertical structure and variability of coastal fronts in the Inner Sea of Chiloe and its adjacent coastal ocean.
Article
Geosciences, Multidisciplinary
Claudia Pasquero, Fabien Desbiolles, Agostino N. Meroni
Summary: Tropical cyclones generate large and wide cold wakes along their trajectories, impacting the evolution of the cyclones themselves and reducing cloud coverage and rainfall. This study sheds light on the mechanisms of air-sea feedbacks triggered by cold wakes, which may vary at different latitudes. Further research is needed to assess the significant impact of cyclone-induced cloud cover anomalies on Earth's radiative budget.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Mahboubeh Molavi-Arabshahi, Klaus Arpe
Summary: This study validates the results from idealized model simulations and explains the connections between the Caspian Sea level, its size change, and surface temperature. It provides evidence that the size of the Caspian Sea could impact the occurrence of El Nino events, which in turn affect atmospheric circulation.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Yue Bai, Andrew Thompson, Ana Villas Boas, Patrice Klein, Hector Torres, Dimitris Menemenlis
Summary: This study assesses the combined influence of thermal feedback (TFB) and current feedback (CFB) on surface wind stress derivatives. The results show that considering both feedbacks can significantly improve the reconstruction of wind stress curl magnitude and structure. The jointly-generated wind stress anomalies are much stronger than at mesoscale, and contributions from each feedback vary temporally.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Agostino N. Meroni, Fabien Desbiolles, Claudia Pasquero
Summary: The study examines the thermal air-sea interaction mechanism that influences atmospheric mixing due to sea-surface temperature variability using long-term satellite records. Statistical analyses are conducted on daily and instantaneous wind and SST data over major western boundary currents. The results show that the wind-SST coupling, mediated by atmospheric mixing, is highly relevant on short time scales, with the atmosphere responding instantly to the presence of SST structures. The coupling strength varies seasonally, with the lowest coupling occurring during winter.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2023)
Article
Environmental Sciences
Lejiang Yu, Shiyuan Zhong, Timo Vihma, Cuijuan Sui, Bo Sun
Summary: We used global atmospheric reanalysis ERA5 and reconstructed sea surface temperature (SST) data to investigate the relationship between the Subtropical Indian Ocean Dipole (SIOD) and South Atlantic Ocean Dipole (SAOD) indices. We found a significant positive correlation between the two indices before 2000, but the correlation weakened afterwards. The results suggest that convective activities and atmospheric wavetrains play a role in the correlation between SST oscillations in the southern Indian Ocean and the Atlantic Ocean.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Oceanography
Yanmin Zhang, Yifan Wang, Yunhua Wang, Yining Bai, Chaofang Zhao
Summary: This study analyzes the response relationship between equivalent neutral wind speed anomaly (ENWSA) and sea-air temperature difference anomaly (SATDA) in four sea regions. The results suggest that SATDA is a more suitable parameter than sea surface temperature anomaly (SSTA) to analyze mesoscale air-sea interactions. The coupling coefficient, which represents the linear relationship between ENWSA and SATDA, exhibits seasonal and geographical variations.
ACTA OCEANOLOGICA SINICA
(2022)
Article
Meteorology & Atmospheric Sciences
Sem Vijverberg, Dim Coumou
Summary: Previous studies have shown that North-Pacific sea surface temperatures can provide long-term predictability for eastern US temperatures through atmospheric Rossby waves. This predictability is linked to the evolution of the Pacific Decadal Oscillation during the winter-to-spring period, providing a temporary window of enhanced predictability for summer temperatures in the eastern US.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2022)
Article
Engineering, Marine
Stefano Querin, Simone Cosoli, Riccardo Gerin, Celia Laurent, Vlado Malacic, Neva Pristov, Pierre-Marie Poulain
Summary: The study used a high-resolution hydrodynamic model to replicate and analyze the eddy structure in the Gulf of Trieste, and evaluated the model's ability to reproduce observed data as well as its sensitivity to external forcing factors (such as wind, river, and tides) to reveal the drivers of eddy formation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Meteorology & Atmospheric Sciences
Simon D. A. Thomas, Daniel C. Jones, Anita Faul, Erik Mackie, Etienne Pauthenet
Summary: Oceanographic fronts serve as transitions between thermohaline structures with different characteristics, impacting the global climate system. Modern approaches challenge traditional views of fronts and introduce new methods emphasizing probabilistic boundary locations.
Article
Meteorology & Atmospheric Sciences
Jae-Heung Park, Sang-Wook Yeh, Jong-Seong Kug, Young-Min Yang, Hyun-Su Jo, Hyo-Jeong Kim, Soon-Il An
Summary: Understanding the interactions between the Atlantic and Pacific Oceans is crucial for global climate. Through analyzing datasets from 1948 to 2020, two regimes of inter-basin interactions were identified: the Pacific-driven regime and the Atlantic-driven regime. In the Pacific-driven regime before the mid-1980s, El Nino-Southern Oscillation (ENSO) effectively influenced the sea surface temperature anomaly (SSTA) in the tropical Atlantic, while in the Atlantic-driven regime after the mid-1980s, the ENSO effect weakened, resulting in a monopole SSTA pattern. Further analysis using climate models supports the hypothesis that these two regimes are likely caused by natural variability.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Environmental Sciences
Yoshimi Kawai
Summary: The study analyzed 32 years of high-resolution atmospheric reanalysis data to determine the atmospheric responses to sea surface temperature (ST) fronts in the Bering Sea and Chukchi Sea. In the Chukchi Sea, the horizontal gradient and Laplacian of ST become noticeable in October and November, while an ST contrast develops in the winter in the Bering Sea. The study also demonstrated the pressure adjustment mechanism and confirmed the vertical mixing mechanism in both seas.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Julian David Pelaez Quinones, Anthony Sladen, Aurelien Ponte, Itzhak Lior, Jean-Paul Ampuero, Diane Rivet, Samuel Meule, Frederic Bouchette, Ivane Pairaud, Paschal Coyle
Summary: Distributed Acoustic Sensing (DAS) technology can convert seafloor fiber-optic telecommunication cables into temperature anomaly sensors, allowing for high-resolution monitoring of oceanic processes. The study demonstrates the potential of DAS in observing internal waves and upwelling, providing a broader understanding of seafloor temperature fluctuations.
SCIENTIFIC REPORTS
(2023)
Article
Meteorology & Atmospheric Sciences
Wei Xue, Xuguang Sun, Xiu-Qun Yang
Summary: The Western North Pacific plays a vital role in the development of ENSO and its impact on the East Asian summer monsoon. Unlike other tropical oceanic areas, the sea surface temperature and precipitation anomalies in the WNP are negatively correlated in boreal summer, indicating a primarily atmospheric-driven system. Two interannual variability modes, known as WNP-TCM and WNP-STCM, have been identified and their core regions align with key atmospheric features. These modes are influenced by local and remote forcing from SST anomalies and are controlled by ocean thermal processes.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Jinsong Lin, Yanfeng Wang, Haidong Pan, Zexun Wei, Tengfei Xu
Summary: Air-sea heat flux is crucial for ocean circulation, weather, and climate. Satellite remote sensing, particularly the Cyclone Global Navigation Satellite System (CYGNSS), is used to estimate turbulent heat fluxes. High uncertainty is found near the equator in the western Pacific Ocean, Arabian Sea, Bay of Bengal, and Gulf of Guinea.
Article
Meteorology & Atmospheric Sciences
Hrishikesh A. Chandanpurkar, Tong Lee, Xiaochun Wang, Hong Zhang, Severine Fournier, Ian Fenty, Ichiro Fukumori, Dimitris Menemenlis, Christopher G. Piecuch, John T. Reager, Ou Wang, John Worden
Summary: River discharge has a significant impact on global ocean models, especially in terms of sea surface salinity and sea surface height. This study uses a global daily varying discharge dataset to analyze the effects of nonseasonal discharge on the ocean. The inclusion of nonseasonal discharge improves the model's accuracy near river mouths, particularly in tropical-to-midlatitude regions. The changes in sea surface height associated with nonseasonal discharge can be explained by the effects of salinity on halosteric height.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
Charles X. Light, Brian K. Arbic, Paige E. Martin, Laurent Brodeau, J. Thomas Farrar, Stephen M. Griffies, Ben P. Kirtman, Lucas C. Laurindo, Dimitris Menemenlis, Andrea Molod, Arin D. Nelson, Ebenezer Nyadjro, Amanda K. O'Rourke, Jay F. Shriver, Leo Siqueira, R. Justin Small, Ehud Strobach
Summary: This paper investigates high-frequency variability of precipitation using various models and methods, and finds that high-resolution models yield results closer to observations. Increasing model grid spacing generally increases high-frequency precipitation variance in climate modeling.
Article
Geosciences, Multidisciplinary
B. D. Dushaw, D. Menemenlis
Summary: An unconstrained global ocean simulation in 2020 confirms previous observations of diurnal internal tides by acoustic tomography in the Western North Atlantic. The simulation accurately reproduces the characteristics of K1 and O1 internal-tide standing waves, but shows deviations from observations in terms of barotropic and internal tides. The tomographic data provide a benchmark for improving the representation of tides, internal tides, and dissipation in models.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xiangyu Chen, Shiyong Teng, Jinming Li, Xuezhi Qiao, Weidong Zhao, Zhengjie Xue, Xudong Shi, Yuguang Wang, Wensheng Yang, Tie Wang
Summary: Magnetic resonance imaging (MRI) contrast agents, such as Magnevist (Gd-DTPA), have limited blood circulation time due to rapid clearance by the kidney, which hinders the improvement of contrast between tumors and normal tissue. To address this issue, a novel MRI contrast agent using deformable mesoporous organosilica nanoparticles (D-MON) incorporating Gd-DTPA is fabricated. In vivo distribution studies show that the D-MON-based contrast agent can prolong blood circulation time and achieve high-contrast imaging in tumor tissue, surpassing the performance of the clinical contrast agent Gd-DTPA.
ADVANCED MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
C. Bertin, D. Carroll, D. Menemenlis, S. Dutkiewicz, H. Zhang, A. Matsuoka, S. Tank, M. Manizza, C. E. Miller, M. Babin, A. Mangin, V. Le Fouest
Summary: Arctic warming changes the fluxes of nutrients and organic matter from land to sea, affecting air-sea carbon exchange. Using a biogeochemical model, this study examines the role of Mackenzie River discharge in modulating air-sea CO2 fluxes in the southeastern Beaufort Sea from 2000 to 2019. The discharge of six chemical constituents leads to a net CO2 outgassing of 0.13 TgC yr(-1) and a decrease in the coastal carbon sink due to riverine dissolved organic and inorganic carbon. The results indicate that the Mackenzie River influences the capacity of the southeastern Beaufort Sea to act as a sink or source of atmospheric CO2. Accurate representation of land-to-sea biogeochemical coupling is crucial for understanding the Arctic coastal ocean response to the rapidly changing environment.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Abdullah A. Fahad, Oreste Reale, Andrea Molod, Tahmidul Azom Sany, Md Tashin Ahammad, Dimitris Menemenlis
Summary: This article investigates the impact of tropical easterly jet (TEJ) on the Bay of Bengal (BoB) tropical cyclone (TC) activity and the expected changes under global warming conditions. The results suggest that while warmer sea surface temperature (SST) may increase TC activity, the frequency and accumulated energy of TCs in the BoB are projected to decrease in the future, particularly in the northern region. The study emphasizes the importance of both the mean and intermittent characteristics of TEJ in determining the future of TC activity in the BoB.
JOURNAL OF CLIMATE
(2023)
Article
Engineering, Civil
Hongkang Zhao, Yaping Dai, Jun Yang, Youzhen Fang, Chengjie Mi, Lingchen Yang, Guojian Li
Summary: In order to improve the seismic performance of precast reinforced concrete structures, a superimposed slab shear wall with innovative construction details was proposed. Five innovative superimposed slab shear walls and one cast-in-place concrete shear wall were designed and tested, considering the effect of axial compression. The results showed that the innovative superimposed slab shear walls had a higher strength capacity and lower lateral-resistant stiffness than the cast-in-place concrete shear wall. The peak strength capacity of the superimposed slab shear wall increased obviously with the enlargement in the axial compression ratio, but degraded rapidly after the peak load. This investigation provides valuable data for future structural seismic performance evaluations and applications of precast superimposed slab shear wall structures.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Orthopedics
Chuwei Tian, Huanyi Zhu, Liu Shi, Xiangxu Chen, Tian Xie, Yunfeng Rui
Summary: The aim of this study was to evaluate the effects of Friday admission on mortality and clinical outcomes in elderly patients with hip fractures. The study found that Friday admission had no effect on mortality and outcomes, but it may lead to delayed surgery.
ORTHOPAEDIC SURGERY
(2023)
Article
Oceanography
Manfredi Manizza, Dustin Carroll, Dimitris Menemenlis, Hong Zhang, Charles E. Miller
Summary: In recent decades, changes in sea-ice seasonality in the Arctic Ocean (AO) have had significant impacts on the phenology of phytoplankton blooms. Early sea-ice melt triggers earlier blooms, while delayed formation of sea ice leads to second fall blooms. These changes could have important consequences for Arctic marine ecosystems in a warmer and changing climate.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Environmental Sciences
Hector Torres, Alexander Wineteer, Patrice Klein, Tong Lee, Jinbo Wang, Ernesto Rodriguez, Dimitris Menemenlis, Hong Zhang
Summary: The kinetic energy transfer between the atmosphere and oceans, known as wind work, plays a significant role in ocean dynamics. Recent numerical estimates have shown a nearly fivefold increase in global wind work amplitude compared to those reported a decade ago due to the inclusion of a broader range of spatial and temporal scales. However, existing satellite observations do not fully capture this range. The ODYSEA satellite mission, which utilizes a wide-swath measurement approach, performs well in estimating wind work globally, except at latitudes north of 40 degrees N during summer.
Article
Environmental Sciences
Jinbo Wang, Hector Torres, Patrice Klein, Alexander Wineteer, Hong Zhang, Dimitris Menemenlis, Clement Ubelmann, Ernesto Rodriguez
Summary: Near Inertial Oscillations (NIOs) are ocean oscillations forced by intermittent winds, most active at mid-latitudes. This study assesses the potential of a new satellite mission concept, OSYSEA, to recover wind-forced NIOs from co-located winds and currents. Results show that NIOs can be accurately recovered using the ODYSEA spatial and temporal resolution.
Article
Oceanography
Jonathan Aparco-Lara, Hector S. Torres, Jose Gomez-Valdes
Summary: Recent simulations suggest that submesoscale motions play a crucial role in driving upward vertical heat transport. This study focuses on the impact of surface cooling on high-frequency vertical heat fluxes (VHFs) within the surface mixed layer. The results show that surface diurnal cooling increases VHFs, but the extension of positive VHFs towards fine scales is limited by the fastest-growing length scale of mixed layer instabilities.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geosciences, Multidisciplinary
Hector S. Torres, Patrice Klein, Jinbo Wang, Alexander Wineteer, Bo Qiu, Andrew F. Thompson, Lionel Renault, Ernesto Rodriguez, Dimitris Menemenlis, Andrea Molod, Christopher N. Hill, Ehud Strobach, Hong Zhang, Mar Flexas, Dragana Perkovic-Martin
Summary: This article investigates the importance of wind work at the air-sea interface and its impact on the ocean-atmosphere coupled system. It reveals that wind work has different components globally, driving various types of ocean motions, with strong seasonal and latitudinal variations in their spatial and temporal distributions.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Physics, Fluids & Plasmas
Antonio Quintana, Hector S. Torres, Jose Gomez-Valdes
Summary: Balanced motions and internal gravity waves are the main sources of kinetic energy and vertical velocity in the ocean. However, estimating the contribution of balanced motions at short time scales is challenging due to the presence of internal gravity waves. In this study, a dynamical filter was used to separate these two types of motion, and it was found that the diurnal cycle in winter and the dampening in summer significantly affect balanced motions. The filter opens up new possibilities for accurately estimating vertical exchanges in the water column and can be a valuable tool for studying wave-turbulence interactions in ocean simulations.
Article
Geosciences, Multidisciplinary
Olivier Sulpis, Matthew P. Humphreys, Monica M. Wilhelmus, Dustin Carroll, William M. Berelson, Dimitris Menemenlis, Jack J. Middelburg, Jess F. Adkins
Summary: The translation introduces a one-dimensional time-dependent model of early diagenesis called RADI. RADI integrates chemical reactions, advection, diffusion, and bio-irrigation processes and is specifically designed for the study of deep-sea sediments containing calcium carbonates. It combines organic matter degradation-driven CaCO3 dissolution with a diffusive boundary layer and incorporates state-of-the-art parameterizations for CaCO3 dissolution kinetics in seawater. RADI is the first diagenetic model implemented in the programming language Julia and is also available in MATLAB/GNU Octave.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
