Article
Geosciences, Multidisciplinary
Johan M. Edholm, Sebastiaan Swart, Marcel D. Plessis, Sarah-Anne Nicholson
Summary: This study explores the impact of atmospheric rivers (ARs) on surface ocean buoyancy using high-resolution surface observations. It finds that when ARs combine with storms, precipitation is significantly enhanced, and the accumulated precipitation from ARs provides a buoyancy gain to the surface ocean equivalent to surface heat fluxes. The study also highlights that ARs play an important role in summer precipitation over the subpolar Southern Ocean and can alter the upper-ocean buoyancy budget across different timescales.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Yujeong Choi, Dongseon Kim, Jae Hoon Noh, Dong-Jin Kang
Summary: The study focused on the impact of the Changjiang River on CO2 uptake capacity in the northern East China Sea. Results showed that the river significantly lowered surface fCO(2) and the region served as a CO2 sink for the atmosphere. Biological activity in the river-influenced area played a crucial role in CO2 drawdown.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Ecology
Guorong Zhong, Xuegang Li, Jinming Song, Baoxiao Qu, Fan Wang, Yanjun Wang, Bin Zhang, Xiaoxia Sun, Wuchang Zhang, Zhenyan Wang, Jun Ma, Huamao Yuan, Liqin Duan
Summary: Various machine learning methods were used in this study to predict global surface ocean pCO(2) and reduce the uncertainty in estimating the global ocean CO2 sink caused by undersampling of pCO(2). By combining stepwise regression algorithm and feed-forward neural network, predictors of pCO(2) were selected based on regional drivers. The prediction of pCO(2) based on region-specific predictors showed higher accuracy compared to previous research.
Article
Mechanics
Jan G. G. Wissink, H. Herlina
Summary: Direct numerical simulations were performed to investigate the initial development of the Rayleigh-Benard-Marangoni (RBM) instability in a relatively deep domain. The simulations assumed a flat surface and modelled surface cooling with a constant heat flux. The small-scale dynamics of the flow and temperature fields near the surface were fully resolved using a non-uniform vertical grid distribution. The study provided a detailed investigation of the differences in physical mechanisms that drive the Rayleigh- and Marangoni-dominated instabilities and confirmed the enhancement of RBM instability by buoyancy and surface-temperature-gradient-driven Marangoni forces. The critical Marangoni and Rayleigh numbers obtained for the purely Marangoni- and purely Rayleigh-driven instabilities were in good agreement with the literature when using a relevant measure of the effective thermal boundary layer thickness as length scale.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Oceanography
Stan Swierczek, Matthew R. Mazloff, Matthias Morzfeld, Joellen L. Russell
Summary: Simulations of the Argentine Basin show that increasing model resolution from 1/3 degrees to 1/12 degrees enhances vertical transport and surface exchanges of heat, but has no significant effect on surface carbon fluxes despite enhancing downward transport of anomalous DIC.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geosciences, Multidisciplinary
K. E. Altieri, K. A. M. Spence, S. Smith
Summary: Oceanic ammonia emissions are the largest natural source of ammonia globally, with the air-sea flux being consistently from the atmosphere into the ocean even in regions with high surface ocean ammonium concentrations. Temperature is the dominant control on the air-sea ammonia flux, but seasonality in the Southern Ocean nitrogen cycle may influence the direction of the flux.
GEOPHYSICAL RESEARCH LETTERS
(2021)
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
Environmental Sciences
Zhanming Hu, Kaiyuan Guo, Yongjun Yang, Mingliang Zhang
Summary: This study used advanced survey techniques to obtain high-frequency monitoring data of the Liao River Estuary and analyzed the impacts of the rubber dam and sea ice cover on water flux and salinity processes. The results showed that water fluxes were influenced by river discharge, tidal oscillations, and human interventions such as the rubber dam and Panshan Sluice.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Clark Pennelly, Paul G. Myers
Summary: A numerical modeling sensitivity study was conducted in the Labrador Sea by varying atmospheric conditions. Different atmospheric products led to significant differences in air-sea heat flux, level of stratification, depth of the mixed layer, and thickness of Labrador Sea Water.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Oceanography
Wenli Qiao, Lichuan Wu, Jinbao Song, Xue Li, Fangli Qiao, Anna Rutgersson
Summary: Ocean waves have a significant impact on the air-sea momentum flux, causing both magnitude and directional differences between the ocean-side and air-side stresses. These differences are more pronounced in coastal areas and under specific wind and wave conditions.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geochemistry & Geophysics
Oleg S. Pokrovsky, Rinat M. Manasypov, Artem V. Chupakov, Sergey Kopysov
Summary: This study quantified the annual export fluxes and seasonal variability of dissolved carbon, nutrient, and metals in the Taz River in the Russian subarctic region. Three groups of solutes were identified, each with different sources and dependence on water discharge. Similar to other Arctic rivers, spring flood was a major contributor to annual output. The study also found that the presence of suboxic zones may significantly affect the concentrations of certain metals in surrounding waters.
Article
Environmental Sciences
Naipeng Han, Hongyi Ao, Zhan Mai, Qichao Zhao, Chenxi Wu
Summary: Many studies focus on plastic transport from rivers to oceans, but little attention has been paid to plastic transport in the upper reaches of rivers. This study investigated five sections in the upper reaches of the Yangtze River to characterize plastic transport. The results showed that plastic flux in the upper reaches of the river is highly variable and influenced by the dam.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Oceanography
Huabin Mao, Xiujun Sun, Chunhua Qiu, Yusen Zhou, Hong Liang, Hongqiang Sang, Ying Zhou, Ying Chen
Summary: Estimates of latent and sensible heat fluxes along the Kuroshio Current were conducted using observations from a wave glider, showing good agreement with sea surface temperature and wind data. The wave glider demonstrated potential for accurately measuring heat fluxes in areas with complex circulation patterns.
ACTA OCEANOLOGICA SINICA
(2021)
Article
Environmental Sciences
Hiroyuki Tomita, Kunio Kutsuwada, Masahisa Kubota, Tsutomu Hihara
Summary: The reliability of surface net heat flux data from J-OFURO3 was investigated using global long-term means, local accuracy evaluations, and physical consistency with the global water cycle. Imbalances were found in the surface net heat flux, particularly due to differences in turbulent heat flux and net downward surface radiation, as well as biases in surface sensible heat flux in mid- and high latitudes. Corrections to these biases helped improve the global mean net heat flux values. Additionally, the impact of low data coverage in high-latitude regions containing sea ice was assessed, with adjustments leading to significant changes in the net heat flux values.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Gang Wang, Hongyu Ma, Alexander V. Babanin, Biao Zhao, Chuanjiang Huang, Dejun Dai, Fangli Qiao
Summary: Sea spray plays a crucial role in the exchange of heat, mass, and gases between the ocean and the atmosphere. A self-consistent system was established to estimate the sea spray volume flux from laser intensity, taking into account environmental variables such as the atmospheric extinction coefficient. This study found consistent relationships between the variables in both laboratory and field experiments, particularly the relationship between wind speed and spray volume flux.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
X. Flores-Melo, R. Giesecke, I. R. Schloss, M. P. Latorre, X. Durrieu de Madron, F. Bourrin, M. L. Spinelli, C. Menniti, H. E. Gonzales, E. Menschel, J. Martin
Summary: This study presents an evaluation of the downward fluxes and composition of particulate matter in the Beagle Channel. The results show that the fluxes and composition of particulate matter differ between the western and eastern parts of the channel, with the former influenced by glacial and organic material, and the latter dominated by river inputs and phytoplankton blooms. This research contributes to understanding the impact of climate change on the biological carbon pump and land-sea connections in this high-latitude ecosystem.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Simone M. A. Lira, Ralf Schwamborn, Mauro de Melo Junior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitao, Moacyr Araujo, Catarina R. Marcolin
Summary: In this study, CTD and ADCP data, as well as zooplankton samples from Fernando de Noronha Archipelago, were used to analyze the relationship between flow, island topography, chlorophyll-a fluorescence, and zooplankton abundance. The study found the presence of island and larval island effects downstream, and an upstream island effect upstream.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Olga Yu. Evseeva, Alexander G. Dvoretsky
Summary: This study investigated the species composition and spatial distribution of bryozoan diversity in the southern region of Franz Josef Land. A total of 151 bryozoan species were found, including 22 species recorded for the first time in this region. The diversity of bryozoans in this area is influenced by environmental factors such as depth, temperature, and the content of stones and shells.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Emma F. Young, Sally E. Thorpe, Angelika H. H. Renner, Eugene J. Murphy
Summary: Antarctic krill is a key species in the Southern Ocean and also the target of a commercial fishery. This study focuses on understanding the physical and behavioral drivers of krill movement and retention in the South Orkney Islands region through a regional modeling approach. The results suggest that oceanic transport and retention of krill are influenced by oceanographic variability and krill behavior.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loic Le Goff, Olivier Bianchimani, Solene Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-Francois Sys, Adrien Cheminee, Eric Feunteun, Anthony Acou, Patrice Brehmer
Summary: Scientists combined split-beam and multibeam echosounders to detect and classify different fish species, and found that acoustic data significantly improved the accuracy of species classification. These acoustic methods have important implications for marine management and decision-making.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Jia-Hui Xie, Xue-Lin Shao, Kai Ma, Li Gao
Summary: Chaetomorpha linum can store a large amount of phosphorus and utilize it for growth when phosphate is abundant, and it can produce alkaline phosphatase and release mobile phosphorus from sediments when phosphate is deficient. The sources of phosphorus supporting the blooms of C. linum vary seasonally in Swan Lagoon.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. A. Kubryakov, A. I. Mizyuk, S. V. Stanichny
Summary: This article investigates the evolution of the Sevastopol eddies using altimetry measurements and a high-resolution Nemo numerical model. The eddies can reside in the Black Sea for >3-6 months, impacting cross-shelf exchange and nutrient fluxes. The stationarity of the eddies is mainly due to the continental slope acting as a barrier, preventing cyclonic propagation.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Qingyuan Yang, Guoping Zhu
Summary: This study investigated the feeding habits of the spiny icefish in the Bransfield Strait and used biochemical tracers to demonstrate the variability in its diet, which is influenced by the availability of krill and the dynamic hydrography. The results highlight the potential of biochemical tracers in reflecting changes in prey's diet in a highly dynamic environment.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Andreana Cadaillon, Clara M. Iachetti, Ricardo Giesecke, Valeska Vasquez Lepio, Andrea Malits, Irene R. Schloss
Summary: A joint Chilean-Argentinian research cruise in the Beagle Channel revealed spatial and temporal heterogeneity of plankton abundance and composition. Plankton assemblages varied with bathymetry, water temperature, and nutrient availability. The easternmost sector of the channel had the highest total cell abundances and a diverse mix of small and large diatoms.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Barbara P. Paiva, Carlos A. F. Schettini, Eduardo Siegle
Summary: The Sao Francisco River is an important river in Brazil, crossing the semi-arid region. A series of dams have been built along the river for hydropower, changing the flow significantly. A hydrodynamic model was used to simulate the effects of flow changes on saline intrusion in the estuary. The simulations showed an increase in mixing and decrease in river contribution after the dams were built. The results can be used by management agencies to improve water quality for human consumption.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xu Dong, Di Qi, Baohong Chen, Yingxu Wu, Xinqing Zheng, Hui Lin
Summary: Seasonal-scale local forcings reduce coastal pH and aragonite saturation state. The dynamics of carbonate system parameters were investigated in a coral habitat influenced by seasonal current patterns. Both Oaragonite and pH showed seasonal variations, controlled by dissolved inorganic carbon (DIC) and temperature. Ocean acidification scenarios projected a decrease in Oaragonite amplitude and an increase in hydrogen ion concentration ([H+]) amplitude.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Roman Cieslinski, Izabela Chlost, Michal Szydlowski
Summary: The Vistula Lagoon, one of the two lagoons on the Polish coast, is economically and environmentally significant. This study aims to calculate the water balance of the lagoon before and after the construction of a canal through the Vistula Spit. The construction of the new connection may impact the lagoon's water balance and its biotic and abiotic environment. Data on precipitation, evaporation, inflow from the catchment, and inflow/outflow through the Strait of Baltiysk were collected for mathematical modeling. The study suggests that the construction of the new canal will not significantly alter the lagoon's water balance but may cause environmental problems.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
F. P. Brandini, A. M. Silver, A. Gangopadhyay
Summary: We demonstrate that wind-driven Ekman transport enhances the advection and mixing of cells, leading to the transport of colder water from the Surface Antarctic Waters to the warmer waters of the northern Polar Front belt. This mechanism provides cells with a favorable temperature environment, allowing for specific species and community growth rates to develop blooms under non-light limiting macronutrients and iron conditions. Our findings have important implications for increased productivity in a future warming climate.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
John E. Garzon-Cardona, Ana M. Martinez, Boris P. Koch, Bernd Krock, Elbio D. Palma, Xianyu Kong, Ruben J. Lara
Summary: This study aimed to gain a better understanding of the role of dissolved organic matter (DOM) in the biogeochemistry of the Southern Patagonian shelf. The results showed that terrigenous input is the main source of ammonium and refractory carbon in the region, while the Antarctic Circumpolar Current contributes autochthonous DOM. Additionally, regeneration processes of nitrogen-rich water were found in the Tierra del Fuego Waters and Grande Bay regions.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimara Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
Summary: This study comprehensively analyzes the impacts of Tropical Cyclone Yaas on the mangrove forest in Bhitarkanika National Park, revealing significant ecosystem loss and changes in vegetation vigor and soil conditions, particularly an increase in salinity.
JOURNAL OF MARINE SYSTEMS
(2024)