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
Geochemistry & Geophysics
Daniele Hauser, Saleh Abdalla, Fabrice Ardhuin, Jean-Raymond Bidlot, Mark Bourassa, David Cotton, Christine Gommenginger, Hayley Evers-King, Harald Johnsen, John Knaff, Samantha Lavender, Alexis Mouche, Nicolas Reul, Charles Sampson, Edward C. C. Steele, Ad Stoffelen
Summary: This review paper discusses the current development of observing surface winds, waves, and currents from space and their applications in scientific research. Satellite missions for monitoring sea state parameters have significantly increased since the 1990s. Microwave-based sensors are commonly used for these observations. The paper also emphasizes the significance of understanding sea state in various fields and highlights the importance of long-time series of global sea-state observations for analyzing climate change impacts.
SURVEYS IN GEOPHYSICS
(2023)
Article
Multidisciplinary Sciences
Steven D. Miller
Summary: Milky seas are large areas of uniformly glowing ocean seen at night, thought to be caused by luminous bacteria. However, their composition, structure, cause, and implications in nature are still uncertain. Satellite sensors detected a possible bioluminescent milky sea spanning over 100,000 km(2) south of Java, Indonesia between late July and early September 2019. The crew members of yacht Ganesha confirmed and shared their personal encounter with this phenomenon. Their experience was compared with satellite data, and the photography of this milky sea was assessed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Karlis Mikelsons, Menghua Wang, Xiao-Long Wang, Lide Jiang
Summary: The study developed a methodology to derive a global medium-resolution land mask from multiple data sources, showing how combining data from different sources can improve the quality and consistency of the data. Using ocean color product imagery to evaluate and validate the new global land mask, the study demonstrated significant improvements in global ocean color data coverage accuracy.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Oceanography
Zhongxiang Zhao
Summary: This study investigated the seasonal variability of mode-1M(2) internal tides using 25 years of multisatellite altimeter data. Four seasonal internal tide models were constructed and a newly developed mapping procedure helped suppress model errors. Results showed that the seasonal-mean model performed the best overall, while the seasonally variable models were better in the tropical zone.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Article
Geosciences, Multidisciplinary
Luc Lenain, Benjamin K. Smeltzer, Nick Pizzo, Mara Freilich, Luke Colosi, Simen A. Ellingsen, Laurent Grare, Hugo Peyriere, Nick Statom
Summary: In this study, a unique set of high-resolution observations of surface currents and directional properties of surface waves collected from an airborne instrument, the Modular Aerial Sensing System, off the coast of Southern California is presented. The new instrument, DoppVis, is capable of capturing high-resolution observations of near surface current profiles and shear down to 128 m resolution. This dataset provides an opportunity to examine the modulation of bulk, directional and spectral properties of surface gravity waves by currents at scales ranging from 1 to 100 km, and contributes to the understanding of submesoscale processes and the transitions between mesoscale and submesoscale dynamics.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Zigeng Song, Xianqiang He, Yan Bai, Xinyi Dong, Difeng Wang, Teng Li, Qiankun Zhu, Fang Gong
Summary: In this study, a new AC algorithm called OC-XGBRT was developed to retrieve Rrs(λ) in the presence of AA in the blue and ultraviolet bands. The algorithm, based on radiative simulation and machine learning, aims to improve the quality of ocean color satellite products over inland and coastal waters with AA. Validation and application results showed that OC-XGBRT outperformed other AC algorithms in terms of accuracy and spatial coverage of Rrs(412 nm) and Rrs(443 nm).
REMOTE SENSING OF ENVIRONMENT
(2023)
Review
Oceanography
Edward Robinson, Phil Hosegood, Adam Bolton
Summary: Physical oceanographic observations were conducted to study the dynamics of coldwater intrusions and the behavior of reef manta rays in the Chagos Archipelago. The study revealed the complex thermal regime and the role of high frequency internal wave events in promoting mixing and influencing feeding efficiency. These findings emphasize the importance of considering fine-scale changes in oceanographic conditions when studying habitat utilization by mobile species.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Remote Sensing
Michael J. Sayers, Gary L. Fahnenstiel, Robert A. Shuchman, Karl R. Bosse
Summary: A new remote sensing approach with a depth-integrated model was developed to estimate global freshwater carbon fixation from satellite observable lakes. Results showed that areal carbon fixation during the growing season decreases with increasing latitude in both hemispheres, with higher fixation rates in the southern hemisphere and the African continent exhibiting the highest rates. Total daily carbon fixation was estimated at 1.03 teragrams of carbon per day, with a majority occurring in the northern hemisphere and North America showing the highest total fixation due to the large number of Canadian Shield lakes.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2021)
Article
Environmental Sciences
Rongjie Liu, Jie Zhang, Tingwei Cui, Haocheng Yu
Summary: This study evaluates and compares the quality of R-rs(lambda) in the Indian Ocean, finding low-quality data in the Bay of Bengal and oligotrophic gyre zones, possibly influenced by aerosols and sun-glint. Further research is recommended to improve corrections for sun-glint and aerosols in these regions.
Article
Geochemistry & Geophysics
Yunhua Wang, Yining Bai, Yanmin Zhang, Daozhong Sun, Ge Chen, Fangjie Yu, Chaofang Zhao, Hanwei Sun, Lideng Wei, Lei Yang, Weifeng Wu
Summary: This letter presents a theoretical analysis of the impact of ocean wave layover on the decorrelation of interferometric radar altimeter (IRA) images. The results show that the layover of ocean waves has a significant influence on the correlation between master-slave IRA images, especially at very low incidence angles.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Environmental Sciences
Matthijs Gawehn, Rafael Almar, Erwin W. J. Bergsma, Sierd de Vries, Stefan Aarninkhof
Summary: This paper introduces a method for inverting water depths based on optical satellite images of the nearshore water surface, and improves accuracy by enhancing the images and using frequency-based inversion. The experimental results show that the method can accurately predict wave heights and detect sandbars, with potential for broad application.
Article
Geochemistry & Geophysics
Zigeng Song, Xianqiang He, Yan Bai, Difeng Wang, Fang Gong, Qiankun Zhu, Teng Li, Hao Li
Summary: Investigated the impact of the vertical distribution of absorbing aerosols on atmospheric correction and water-leaving radiance retrieval. Found high occurrence frequencies of absorbing aerosols over Sahara and Arabian Deserts, China, South-Central Africa, and Indian Peninsula. Developed a new aerosol classification algorithm and evaluated the effects on radiance and water-leaving radiance.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Oceanography
A. M. Santos-Ferreira, J. C. B. Da Silva, B. St-Denis, D. Bourgault, L. R. M. Maas
Summary: The equatorial cold tongue in the Pacific Ocean has been intensively studied in recent decades due to its important role in air-sea interactions and climate issues. This study presents satellite observations of internal solitary waves (ISWs) in the Pacific cold tongue, revealing their characteristics and connection with buoyant gravity currents. A numerical model confirms the continuous generation of resonantly generated nonlinear internal waves at the fronts of advancing gravity currents.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Article
Engineering, Marine
Yannis S. Androulidakis, Yannis N. Krestenitis
Summary: The study revealed increasing trends in sea surface temperature over the AIC Seas during the past 14 years, especially in marine heat waves. Air temperature changes were closely related to SST variations with a 5-to-10-day lag, but extreme atmospheric events had a more direct impact on SST variability.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
