Article
Environmental Sciences
Luman Cheng, Zhuoan Bai, Hui Wei, Yao Chen, Minghua Wang
Summary: The study investigated the interactive effects of fluctuating acidification and mercury exposure on a marine copepod. The results showed that elevated pCO2 decreased the bioaccumulation of mercury, and this effect was even more pronounced under fluctuating acidification. Combined exposure to acidification and mercury initiated compensatory responses to alleviate mercury toxicity. Fluctuating acidification also induced more immune defense related genes/processes in mercury-treated copepods compared to steady acidification, which may be linked to the greater decrease in mercury bioaccumulation.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Ocean
Gaetano Porcile, Francesco Enrile, Giovanni Besio, Michele Bolla Pittaluga
Summary: This study simulated numerically the salinity and turbidity currents developing on steep and mild slopes two dimensionally, using the Delft3D-Flow process-based model. The results showed that the non-hydrostatic solutions captured in detail the time-dependent stages of dense undercurrents, while the hydrostatic solutions predicted fairly well the steady state of the undercurrents.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Environmental
Donald Scavia, Timothy J. Calappi, Casey M. Godwin, Brad Hill, Mari Veliz, Yu-Chen Wang
Summary: This study finds that the concentrations of nitrogen and phosphorus in the lake are higher during wind-driven resuspension events, and the bioavailability of these substances is comparable to other regions. New load estimates based on continuous turbidity measurements show that the previous load was significantly underestimated, being almost 90% higher than traditional estimates.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Mechanics
Jorge S. Salinas, S. Balachandar, Santiago L. Zuniga, M. Shringarpure, J. Fedele, D. Hoyal, M. Cantero
Summary: Gravity currents are studied in this work, focusing on the flow of a heavier fluid along the bottom of a sloping bed, beneath a stagnant lighter ambient fluid. The thickness of the current increases due to entrainment of ambient fluid. The rate of penetration of mean momentum, mean concentration, and turbulence-related quantities into the ambient fluid are analyzed, with a comparison to wall-bounded turbulent flows.
Article
Environmental Sciences
Wenhao Ding, Jinxiao Zhao, Boqiang Qin, Tingfeng Wu, Senlin Zhu, Yun Li, Shikai Xu, Shiping Ruan, Yong Wang
Summary: This study investigates the relationship between sediment resuspension, wind speed, and turbidity using machine learning and statistical methods. The results show variations in correlations across different datasets, with the linear regression model performing the best in predicting turbidity in the test dataset. The high predicting accuracy is maintained with over 95% of data points falling within the predicted intervals for both methods.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geochemistry & Geophysics
Adina Bogatu, Jean H. Bedard, Loic Labrousse, Alexandre Zagorevski, Alain Tremblay
Summary: The Squanga Lake ophiolite in southern Yukon has a unique geological structure, with a detachment zone separating upper crustal rocks from mantle tectonites, suggesting its formation as an oceanic core complex. The mineral compositions of the mantle rocks indicate re-crystallization during exhumation. The presence of primitive olivine-cumulates and structures in the detachment zone further support the evidence of exhumation.
Article
Environmental Studies
Samantha Darling, Blane Harvey, Gordon M. Hickey
Summary: Participation in Impact Assessment (IA) has been a significant topic of interest for scholars, with a focus on public and Indigenous involvement. This study examines how different approaches to IA have influenced the interaction between actors, specifically in the case of the Yukon Territory. It finds that despite efforts to address constraints through land claims and legislation, there is a contrast between the promise of inclusion and the reality of implementation for Indigenous peoples.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2023)
Article
Geography, Physical
Huazhen Huang, Zhifei Liu, Yulong Zhao, Hongchao Zhao, Adrian R. Fernandez, Christophe Colin, Andrew Tien-Shun Lin
Summary: This study investigates the clay mineral assemblage of late Holocene turbidites in the Gaoping Submarine Canyon to reveal the triggering mechanisms of turbidity currents. The results show that the Gaoping river is the predominant source of sediments in the turbidite layers, while the hemipelagite layers receive sediments from other nearby rivers in southwest Taiwan. It is believed that the turbidity currents, triggered mainly by typhoons passing through Taiwan, directly supplied clay minerals to the submarine canyon to form the turbidites.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Environmental Sciences
Runtao Hu, Wangchen Xu, Wenming Yan, Tingfeng Wu, Xiangyu He, Nannan Cheng
Summary: This study collected and analyzed water quality data from Lake Taihu in China and developed three turbidity models based on LSTM. The models were able to accurately predict turbidity in different zones of the lake.
Article
Environmental Sciences
Lauren A. MacDonald, Kevin W. Turner, Ian McDonald, Mitchell L. Kay, Roland Hall, Brent B. Wolfe
Summary: The lake-rich northern permafrost landscapes are sensitive to changing climate conditions, but the lack of long-term monitoring programs makes it challenging to track real-time hydrological responses. A study in Old Crow Flats, Yukon, revealed that lakes in the area are increasingly influenced by rainfall and potentially thawing permafrost waters, leading to more positive water balances. This highlights the importance of long-term isotope-based monitoring programs in identifying hydrological consequences of climate change in lake-rich permafrost landscapes.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Cheng-Hsien Lee, Jia-You Chen
Summary: This study investigates the effects of particle size and initial concentration on subaqueous granular collapse on an inclined plane. Experimental and numerical simulation results validate the multiphase model and reveal that particle size and initial concentration significantly affect the initial sliding volume and front speed.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Geography, Physical
Zoe Landry, Sora Kim, Robin B. Trayler, Marisa Gilbert, Grant Zazula, John Southon, Danielle Fraser
Summary: The study found that the dietary behavior of Yukon gray wolves has remained consistent over time, with no significant changes in their consumption of flesh rather than bone. They have been generalist predators, feeding on several large ungulate species for thousands of years. The extinction of megafaunal species around 11.7 ka led to a shift in their diet from horses to cervids, such as moose and caribou, with the survival of large-bodied cervids being crucial for wolf survival.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Public, Environmental & Occupational Health
Elana Nightingale, Chantelle A. M. Richmond
Summary: The concept of environmental repossession is a global movement led by Indigenous peoples to reclaim their territories and ways of life, revitalizing knowledge systems, identities, and relationships. In the Biigtigong Nishnaabeg community, the construction of cabins and hosting of a camp at Mountain Lake served as a local process of reclaiming access to the land and reshaping community relationships.
SOCIAL SCIENCE & MEDICINE
(2021)
Article
Environmental Sciences
Nathalie Lecrivain, Bernard Clement, Aymeric Dabrin, Juliette Seigle-Ferrand, Damien Bouffard, Emmanuel Naffrechoux, Victor Frossard
Summary: The study revealed that during water-level drawdown, pollution concentration in lake water increases, with suspended particles being the preferred medium for contaminants. Model analysis showed that the effects of wind speed and river discharge on turbidity were enhanced during water drawdown.
Article
Engineering, Civil
Richard Wilson, Heide Friedrich, Craig Stevens
Summary: This study investigates the entrainment mechanisms of unconfined turbidity currents interacting with linear rectangular obstacles and compares them with confined studies. The results show that lateral spreading of unconfined currents before obstacles leads to a greater rate of decrease in current density compared to confined conditions. Additionally, obstacle tests exhibit a larger variance in entrainment velocity and head height, with the head height being lower than that for equivalent confined tests.
JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING
(2021)