Article
Environmental Sciences
Shuai Zhang, Tamlin M. Pavelsky, Christopher D. Arp, Xiao Yang
Summary: A remote sensing-derived lake ice phenology database covering all lakes in Alaska from 2000 to 2019 was constructed to analyze the trends of earlier breakup and later freezeup of lake ice in the region. The dataset showed significant trends towards earlier or later ice breakup and freezeup for various lakes, with most significant trends observed in lakes north of the Brooks Range. This dataset contributes to the understanding of interactions between lake processes and climate change, supporting research on biogeochemical, limnological, and ecological regimes in Alaska and pan-Arctic regions.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
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
Meteorology & Atmospheric Sciences
Kristin N. Barton, Nairita Pal, Steven R. Brus, Mark R. Petersen, Brian K. Arbic, Darren Engwirda, Andrew F. Roberts, Joannes J. Westerink, Damrongsak Wirasaet, Michael Schindelegger
Summary: In this study, we used the barotropic version of the Model for Prediction Across Scales (MPAS-Ocean) to examine ocean tides and investigate factors affecting tidal accuracy. We compared different methods of calculating self-attraction and loading (SAL), different model resolutions, details of bathymetry, and parameterized topographic wave drag. We also compared the performance of different resolution meshes and found that a variable resolution mesh obtained the best accuracy for deep ocean M2 tide. In future work, we plan to use MPAS-Ocean to study tidal interactions with other Earth system components and the response of tides to climate change.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Review
Environmental Sciences
Sam Purkis, Ved Chirayath
Summary: This article discusses the wide range of remote sensing technologies currently applied in oceans, highlighting next-generation technologies that may revolutionize the field, while also pointing out significant challenges in ocean remote sensing. Despite oceans comprising over 90% of the habitable volume of Earth, their imaging resolution is far below that of the moon and Mars. At this crucial historical moment, our understanding of rapidly changing marine ecosystems is still limited by technological maturity and challenges.
ANNUAL REVIEW OF ENVIRONMENT AND RESOURCES
(2022)
Article
Geosciences, Multidisciplinary
Philip L. Woodworth, John M. Vassie
Summary: This study describes the construction of an electronic data set of tidal measurements made at St. Helena in 1761 by Nevil Maskelyne, and reanalyzes the data using various techniques. The results show that the major tidal constituent (M2) has changed little, but it is difficult to obtain reliable conclusions for the smaller constituents.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Benjamin M. Jones, Ken D. Tape, Jason A. Clark, Allen C. Bondurant, Melissa K. Ward Jones, Benjamin V. Gaglioti, Clayton D. Elder, Chandi Witharana, Charles E. Miller
Summary: The study documents the impact of beaver activity on a small creek valley in Alaska's Seward Peninsula, showcasing changes in vegetation and landscape due to beaver engineering. This highlights the significant role beavers play in shaping ice-rich permafrost landscapes.
Article
Environmental Sciences
Juan Wang, Dongling Li, Wenting Cao, Xiulin Lou, Aiqin Shi, Huaguo Zhang
Summary: This study conducted a remote sensing analysis of coastal erosion in three typical regions of Alaska and Eastern Siberia. Comparative studies were made on the differences in erosion between different latitudes and the factors influencing erosion at similar latitudes. The study found that the most extensive erosion occurred along the coast of Alaska, followed by Eastern Siberia. Additionally, the erosion of Arctic coasts was found to be closely related to the trend and fluctuations of sea surface temperature.
Review
Environmental Sciences
Meisam Amani, Armin Moghimi, S. Mohammad Mirmazloumi, Babak Ranjgar, Arsalan Ghorbanian, Saeid Ojaghi, Hamid Ebrahimy, Amin Naboureh, Mohsen Eslami Nazari, Sahel Mahdavi, Sayyed Hamed Alizadeh Moghaddam, Reza Mohammadi Asiyabi, Seyed Ali Ahmadi, Soroosh Mehravar, Farzane Mohseni, Shuanggen Jin
Summary: This study comprehensively reviews and discusses 15 applications of remote sensing techniques in the ocean, covering various types of remote sensing systems. It is divided into two parts, providing detailed information and case studies.
Article
Environmental Sciences
Michael G. Hart-Davis, Denise Dettmering, Roman Sulzbach, Maik Thomas, Christian Schwatke, Florian Seitz
Summary: Satellite altimetry has greatly improved the understanding of global sea surface processes and tidal estimations. By comparing direct estimations and using admittance theory, researchers have identified which minor tidal constituents should be directly estimated for optimal tidal corrections. The study also suggests that incorporating minor tides from multiple tide models can further improve the accuracy of tidal corrections and reduce sea-level variance.
Article
Multidisciplinary Sciences
B. Yadidya, A. D. Rao, Sachiko Mohanty
Summary: This study used a coupled model to simulate the diurnal variations in temperature, salinity, and density in the surface mixed layer and pycnocline of the ocean. The simulations showed promising results and have potential applications in simulating acoustic fields and propagation losses for Navy operations.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Ilaria Cazzaniga, Giuseppe Zibordi, Frederic Melin
Summary: This study investigates the spectral features of remote sensing reflectance in marine waters during coccolithophore blooms by analyzing radiometric data from Ocean Color sites in the Western Black Sea. The results confirm an increase in reflectance in the blue-green spectral region during coccolithophore blooms, as well as a shift towards the blue as the blooms decline and coccoliths accumulate at the surface. It also highlights the challenges in determining bloom states in optically complex waters and compares satellite data with AERONET-OC radiometric data to show agreements in extreme conditions with significant concentrations of coccoliths.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Environmental Sciences
Hua Su, Yanan Wei, Wenfang Lu, Xiao-Hai Yan, Hongsheng Zhang
Summary: By comparing different datasets, this study reveals that global ocean warming has been continuously increasing over the past three decades, with more heat being absorbed by the deeper ocean. The OPEN dataset, reconstructed through remote sensing, shows a unique warming pattern in the East Indian Ocean.
Article
Geosciences, Multidisciplinary
M. Contreras, L. Renault, P. Marchesiello
Summary: This article investigates the impact of tides on energy dissipation in the Gulf Stream. The research finds that tides increase the forward cascade of energy in the region by generating internal gravity waves. However, this effect is much weaker compared to frictional dissipation at the boundaries.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Review
Oceanography
Brian K. Arbic
Summary: This article reviews an emerging class of high-resolution global models that consider the effects of both atmospheric fields and astronomical tidal potentials, and can simulate various oceanic phenomena. These models have numerous applications in satellite oceanography, operational oceanography, boundary forcing, tidal-cryosphere interactions, and assessment of the impact of tidal changes on future coastal flooding hazards.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Operations Research & Management Science
Jixuan Yan, Guang Li, Hongqiang Qiao, Dongyuan Sun, Xiangdong Yao, Ignatious K. Pious
Summary: This study proposes a pixel-level-based remote-sensing imaging approach that combines global and regional characteristics to improve the predictive capabilities of remote sensing images. The experimental results demonstrate that this method outperforms other remote sensing data systems in terms of prediction accuracy.
ANNALS OF OPERATIONS RESEARCH
(2023)
Editorial Material
Oceanography
Tal Ezer, Lie-Yauw Oey, Huijie Xue, Marco Zavatarelli, Gianmaria Sannino, Ricardo de Camargo
Article
Engineering, Ocean
Tal Ezer
MARINE TECHNOLOGY SOCIETY JOURNAL
(2018)
Article
Oceanography
Tal Ezer
Article
Environmental Sciences
Tal Ezer
Article
Oceanography
Tal Ezer
Article
Meteorology & Atmospheric Sciences
Tal Ezer, Sonke Dangendorf
Summary: The study identified gravitational, rotational and deformational effects as responsible for multidecadal variations in sea level, while changes related to wind patterns and oceanic kinetic energy were mainly seen at interannual and decadal scales. Comparisons in western boundary currents regions showed a general upward trend in oceanic kinetic energy, while trends in wind kinetic energy varied widely across different regions.
Article
Environmental Sciences
Sonke Dangendorf, Thomas Frederikse, Leon Chafik, John M. Klinck, Tal Ezer, Benjamin D. Hamlington
Summary: Research on historical and projected coastal sea-level change reveals that ocean dynamics, including density fluctuations, have a significant impact. By analyzing global tide-gauge records, a reconstruction of coastal sea-level budget over nine regions is possible, indicating that ocean circulation has been a dominant factor in sea-level variability since 1960.
NATURE CLIMATE CHANGE
(2021)
Article
Oceanography
Tal Ezer, Sonke Dangendorf
Summary: A new approach for analyzing spatiotemporal variability across ocean basins was tested using global sea level reconstruction data. The study found that long-term time series provide significant statistical results and allow for direct comparison between spatial and temporal variability. By decomposing the records into high-frequency and low-frequency modes, the research revealed spatiotemporal changes in the Pacific and Atlantic Oceans.
Article
Oceanography
Tal Ezer, Sonke Dangendorf
Summary: A numerical model of the Gulf Stream and the US East Coast was used to study the sensitivity of the dynamic response to temperature anomalies from different locations in the Atlantic. The results showed that temperature anomalies can cause changes in coastal sea level, velocity, and the position of the Gulf Stream, as well as increased kinetic energy. The impact varies depending on the location and type of anomaly.
Article
Oceanography
Tal Ezer
Summary: This study investigates the long-term variability of sea level and surface flows in the Gulf of Mexico using global monthly sea level reconstruction. The results show an increasing trend in the mean velocity and variability of the Loop Current, while no significant upward trend is found in the flows through the Yucatan Channel and the Florida Straits. The study demonstrates the usefulness of even a coarse-resolution reconstruction for studying regional ocean variability and climate change over longer time scales.
Article
Environmental Sciences
Tal Ezer
Summary: This study demonstrates a simple flood prediction method for Norfolk, VA, a city at risk of increased flooding. It estimates the probability of future flooding by extending observed water levels and simulating tides and storm surges. The results show a projected increase in flooding over time, particularly under higher sea level rise projections.
Article
Oceanography
Tal Ezer
Summary: Fast sea level rise poses a growing flooding risk to coastal communities in the Chesapeake Bay. Variations in sea level variability and sea level rise rates within the bay have not been fully investigated. Analysis of monthly sea level records from eight tide gauge stations spanning the bay reveals significant spatial variations over different time scales. The study also finds an anticorrelation between the upper and lower bay in sea level anomaly variations.
Article
Multidisciplinary Sciences
Soenke Dangendorf, Noah Hendricks, Qiang Sun, John Klinck, Tal Ezer, Thomas Frederikse, Francisco M. Calafat, Thomas Wahl, Torbjoern E. Toernqvist
Summary: A study finds that global mean sea level has been accelerating since the 1960s, but detecting this locally is difficult due to natural variability. However, tide gauge records along the U.S. Southeast and Gulf coasts show unprecedented rates of sea level rise (>10 mm yr(-1) since 2010). The acceleration is primarily induced by an ocean dynamic signal exceeding the externally forced response, and is compounded by wind driven Rossby waves.
NATURE COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Tal Ezer, Sonke Dangendorf
Article
Engineering, Marine
Digna T. Rueda-Roa, Tal Ezer, Frank E. Muller-Karger
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2018)