Article
Geochemistry & Geophysics
Yun-Jing Geng, Pei Leng, Xiaoning Song, Zhao-Liang Li
Summary: This study proposes a novel method for estimating daytime average evapotranspiration (ET) using temporal measurements of land surface temperature (LST) and net surface shortwave radiation (NSSR). The method is developed based on a simulated data of a physics-based Atmosphere-Land Exchange (ALEX) model and shows considerable accuracy with a coefficient of determination (R-2) of 0.958 and a root mean square error (RMSE) of 25.3 Wm(-2). Ground ET measurements at four Ameriflux sites were collected to assess the estimated ET and the results indicate the potential for generating daytime ET with geostationary satellite observations at regional scales.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
Article
Geochemistry & Geophysics
Chong Jia, Peter J. Minnett, Malgorzata Szczodrak, Miguel Izaguirre
Summary: In this study, six Saildrone uncrewed surface vehicles were deployed to collect atmospheric and oceanographic measurements in the Arctic Ocean. By analyzing the data from downward-and upward-looking radiometers, an algorithm was developed to accurately determine the sea surface skin temperature. The findings show that the Saildrones equipped with these sensors can provide sufficiently accurate measurements for studying thermal skin effect and validating satellite-derived SSTskin fields.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Multidisciplinary Sciences
Ahmed Mahjoub, Kathrin Altwegg, Michael J. Poston, Martin Rubin, Robert Hodyss, Mathieu Choukroun, Bethany L. Ehlmann, Nora Hanni, Michael E. Brown, Jordana Blacksberg, John M. Eiler, Kevin P. Hand
Summary: The ROSINA instrument aboard the Rosetta mission has advanced our understanding of cometary material composition. By analyzing data from a dust event in September 2016, the study reveals the detection of large organo-sulfur species and an increase in the abundance of sulfurous species in the comet's coma. Laboratory simulations further suggest that these materials may have formed from the irradiation of mixed ices containing H2S. This study emphasizes the significance of sulfur chemistry in cometary and precometary materials, and proposes the possibility of characterizing organosulfur materials in other comets and small icy bodies using the James Webb Space Telescope.
Article
Meteorology & Atmospheric Sciences
Kunchala Ravi Kumar, Bhupendra Bahadur Singh, Kondapalli Niranjan Kumar
Summary: This study investigates the variability of lower stratospheric ozone in the Asian Summer Monsoon Anticyclone (ASMA) region using long-term observations from the Microwave Limb Sounder (MLS) onboard Aqua satellite. It identifies two prominent source regions controlling the interannual variability of ozone, with extreme ozone anomalies coinciding with El Nino/La Nina events. The results suggest that changes in ozone concentrations during El Nino and La Nina phases are influenced by reduced water vapor transport due to atmospheric dynamics.
ATMOSPHERIC RESEARCH
(2021)
Article
Geography, Physical
Si-Bo Duan, Zhao-Liang Li, Wei Zhao, Penghai Wu, Cheng Huang, Xiao-Jing Han, Maofang Gao, Pei Leng, Guofei Shang
Summary: This study validated Landsat 5, 7, and 8 land surface temperature products in the conterminous United States from 2009 to 2019 using in situ measurements. The results showed consistent performance among the three sensors, but large biases were observed at vegetated sites due to incorrect land surface emissivity estimation.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2021)
Article
Environmental Sciences
Emy Alerskans, Ann-Sofie P. Zinck, Pia Nielsen-Englyst, Jacob L. Hoyer
Summary: Two machine learning models were investigated for retrieving sea surface temperature from passive microwave satellite observations, and their performance was compared to an existing regression algorithm. The results showed that the machine learning models outperformed the traditional regression algorithm, demonstrating their potential for sea surface temperature retrieval.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Jacqueline Boutin, Jean-Luc Vergely, Emmanuel P. Dinnat, Philippe Waldteufel, Francesco D'Amico, Nicolas Reul, Alexandre Supply, Clovis Thouvenin-Masson
Summary: By studying the dielectric constant parametrization and making slight modifications to the ST model, systematic differences in SMOS data can be reduced.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Thermodynamics
A. Chaudhary, A. Coppalle, G. Godard, P. Xavier, B. Vieille
Summary: This study implements phosphor thermometry to measure the surface temperature of a carbon fibers reinforced polymers composite exposed to a flame. Phosphor thermometry, commonly used on metallic materials, is applied to measure the backside temperature of a carbon fiber PPS polymer composite and compared to infrared thermography. The results show that phosphor thermometry accurately measures surface temperature at high temperatures.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Environmental Sciences
Katherine Fitzenreiter, Miaohua Mao, Meng Xia
Summary: The circulation of a shallow lagoon-inlet-coastal ocean system and its influences from winds and tides were studied using surface drifter observations in the Maryland Coastal Bays system. Results showed that the movement of surface drifters varied with tidal phases and wind conditions, and different circulation patterns formed near different inlets and backbays. This study provides valuable information for understanding coastal physical oceanography and can benefit similar systems and coastal communities.
ESTUARIES AND COASTS
(2022)
Article
Geochemistry & Geophysics
Xiaolei Yu, Shuangling Chen, Fei Chai
Summary: The study developed a stacking random forest (SRF) model for estimating sea surface nitrate in the central and southern sections of the California Current System. The model showed high accuracy and robustness, suggesting it could serve as a reliable approach for other regions once in situ SSN data are available for model calibration.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Mengmeng Wang, Can He, Zhengjia Zhang, Tian Hu, Si-Bo Duan, Kaniska Mallick, Hua Li, Xiuguo Liu
Summary: In this study, an evaluation of three Landsat long-term land surface temperature (LST) products was conducted. The results showed that USGS LST outperforms IPMA/CUG LST in atmospheric correction over water surface, but has higher bias and RMSE compared to IPMA/CUG LST in cropland and shrubland. The LST retrievals for different sensors onboard the Landsat satellite series have consistent and comparable accuracies.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Multidisciplinary Sciences
Shane Elipot, Adam Sykulski, Rick Lumpkin, Luca Centurioni, Mayra Pazos
Summary: This dataset is generated from the temperature observations of surface drifting buoys of NOAA's Global Drifter Program. It provides estimates of sea surface temperature (SST) along drifter trajectories at regular hourly intervals, taking into account both diurnal and low-frequency variability. The dataset includes non-diurnal SST estimates, diurnal SST anomalies, and total SST along with their respective standard uncertainties.
Article
Environmental Sciences
Erik van Sebille, Erik Zettler, Nicolas Wienders, Linda Amaral-Zettler, Shane Elipot, Rick Lumpkin
Summary: An analysis of two types of surface drifters deployed in the Tropical Atlantic Ocean revealed that undrogued drifters separate more slowly than drogued drifters, and are more likely to enter the Caribbean Sea. The study also found that a novel ocean currents product did not clearly simulate the drifters, highlighting the need for further improvements in hydrodynamic models for Sargassum drift forecasting in the region.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Paolo Celentano, Pierpaolo Falco, Francesco Memmola, Enrico Zambianchi
Summary: The surface connection in the Mediterranean Sea is studied by examining the statistical properties of 1632 near-surface Lagrangian trajectories. Four study areas were selected and the bootstrap resampling method was used to compute Lagrangian statistics. Pseudo-Eulerian analysis revealed the main dynamical structures present in the Mediterranean Sea. Connection percentages showed the highest values along the main surface current patterns.
JOURNAL OF MARINE SYSTEMS
(2023)
Article
Construction & Building Technology
Shun Kawakubo, Shiro Arata, Yuto Demizu, Tomomitsu Kamata, Daisuke Narumi, Takashi Asawa, Tomohiko Ihara
Summary: This study proposes a method to detect roadways and extract roadway surface temperatures from infrared images, and validates the effectiveness of the method by measuring the temperatures and identifying hot and cool areas in Tokyo. The results show that wide roadways and high sky view factors lead to higher surface temperatures, while temperatures are lower and more stable in street canyons. Although the accuracy of deep learning in roadway detection is imperfect, the method significantly improves analytical efficiency and can also be applied to evaluate surface temperatures of various city components.
SUSTAINABLE CITIES AND SOCIETY
(2023)
Article
Environmental Sciences
Adele Revelard, Emma Reyes, Baptiste Mourre, Ismael Hernandez-Carrasco, Anna Rubio, Pablo Lorente, Christian De Lera Fernandez, Julien Mader, Enrique Alvarez-Fanjul, Joaquin Tintore
Summary: This study evaluates the performance of four models in the Ibiza Channel and examines the applicability of Skill Score (SS) in coastal risk-prone regions for SAR operations. The results show that SS increases with forecast time, but exhibits high variability at short forecast times and can be overestimated at longer forecast times due to high variability of surface currents. A revised definition of SS, called SS*, is recommended for properly evaluating average model performance. High-frequency radar-derived trajectories could be used to complement drifter observations, with the SS favoring coarser-resolution models on average.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geochemistry & Geophysics
Jacqueline Boutin, Jean-Luc Vergely, Emmanuel P. Dinnat, Philippe Waldteufel, Francesco D'Amico, Nicolas Reul, Alexandre Supply, Clovis Thouvenin-Masson
Summary: By studying the dielectric constant parametrization and making slight modifications to the ST model, systematic differences in SMOS data can be reduced.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Environmental Sciences
Clovis Thouvenin-Masson, Jacqueline Boutin, Jean-Luc Vergely, Gilles Reverdin, Adrien C. H. Martin, Sebastien Guimbard, Nicolas Reul, Roberto Sabia, Rafael Catany, Odile Hembise Fanton-d'Andon
Summary: Satellite sea surface salinity (SSS) products are typically validated by comparing them with in-situ measurements, but the difference in spatio-temporal resolution leads to a sampling mismatch uncertainty. This study merges SSS from three satellite missions and estimates weekly and monthly SSS and their uncertainties at a 50 km spatial resolution. A quantitative validation is performed by considering the statistical distribution of the differences between the satellite and in-situ measurements, and the results indicate that the differences in dynamical regions are mainly due to the sampling mismatch.
Article
Geosciences, Multidisciplinary
Pierre Poitevin, Pascal Lazure, Virginie Roy, Sebastien Donnet, Laurent Chauvaud
Summary: As one of the foremost global forcings, tidal circulation exerts a pervasive influence on biological and physical processes in the world's oceans. This research identified an 18.6-year periodic variation in the lunar orbital plane and its potential ecological implications. The study used satellite data and numerical modeling to demonstrate the influence of the 18.6-year nodal lunar cycle on diurnal tidal currents in the coastal regions of the Northwest Atlantic shelf.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Ecology
Sebastien Donnet, Pascal Lazure, Andry Ratsimandresy, Guoqi Han
Summary: This paper describes the physical oceanography of Fortune Bay, including seasonal stratification, water temperature, currents, and water exchange. The study reveals that Fortune Bay is influenced by local freshwater runoff and shelf inputs, exhibiting strong seasonal stratification and warmer water compared to the adjacent shelf. The currents in the bay are influenced by weather bands and downwelling/upwelling events, while tidal currents are weak. Water exchange between the inner and outer part of the bay has shorter residence times with seasonal variability.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Oceanography
Alexandre Supply, Jacqueline Boutin, Nicolas Kolodziejczyk, Gilles Reverdin, Camille Lique, Jean-Luc Vergely, Xavier Perrot
Summary: This study investigates the Chukchi and Beaufort Seas in the Arctic Ocean and demonstrates the ability of satellite sea surface salinity (SSS) to capture SSS freshening induced by sea ice melt. The study analyzes the spatial variability of sea surface properties after the sea ice edge retreat and highlights the impact of meltwater lenses on air-sea momentum transfer. The findings show the importance of using satellite measurements to understand changes in the Arctic's role in climate change.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Pierre L'Hegaret, Florian Schuette, Sabrina Speich, Gilles Reverdin, Dariusz B. Baranowski, Rena Czeschel, Tim Fischer, Gregory R. Foltz, Karen J. Heywood, Gerd Krahmann, Remi Laxenaire, Caroline Le Bihan, Philippe Le Bot, Stephane Leizour, Callum Rollo, Michael Schlundt, Elizabeth Siddle, Corentin Subirade, Dongxiao Zhang, Johannes Karstensen
Summary: The EUREC4A-OA/ATOMIC experiment aimed to study the dynamic processes and interaction between the ocean and the atmosphere in the northwestern Tropical Atlantic Ocean. Multiple devices and platforms were used to gather data, which were calibrated and validated for consistency.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Geochemistry & Geophysics
Jacqueline Boutin, Jean-Luc Vergely, Fabrice Bonjean, Xavier Perrot, Yiwen Zhou, Emmanuel P. Dinnat, Roger H. Lang, David M. Le Vine, Roberto Sabia
Summary: The accuracy of SSS retrieved from L-Band radiometer measurements depends on the reliability of the dielectric constant model. Two new parametrizations based on SMOS satellite measurements and laboratory measurements by George Washington University were found to have better agreement with brightness temperature variations compared to previous parametrizations. However, there is still uncertainty, especially below 10 degrees C.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geosciences, Multidisciplinary
Adriana Bailey, Franziska Aemisegger, Leonie Villiger, Sebastian A. Los, Gilles Reverdin, Estefania Quinones Melendez, Claudia Acquistapace, Dariusz B. Baranowski, Tobias Bock, Sandrine Bony, Tobias Bordsdorff, Derek Coffman, Simon P. de Szoeke, Christopher J. Diekmann, Marina Duetsch, Benjamin Ertl, Joseph Galewsky, Dean Henze, Przemyslaw Makuch, David Noone, Patricia K. Quinn, Michael Roesch, Andreas Schneider, Matthias Schneider, Sabrina Speich, Bjorn Stevens, Elizabeth J. Thompson
Summary: This paper describes the EUREC(4)A isotopic in situ data collection and guides readers to complementary remotely sensed water vapor isotope ratios. All the field data have been publicly available, even with known biases, to promote dialogue around improving water isotope measurement strategies for the future. The high-quality data create unprecedented opportunities to close water isotopic budgets and evaluate water fluxes and their influence on cloudiness in the trade-wind environment.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Meteorology & Atmospheric Sciences
Michael P. Hemming, Jan Kaiser, Jacqueline Boutin, Liliane Merlivat, Karen J. Heywood, Dorothee C. E. Bakker, Gareth A. Lee, Marcos Cobas Garcia, David Antoine, Kiminori Shitashima
Summary: Although the Mediterranean Sea covers only 0.8% of the global oceanic surface, it is considered a disproportionately large sink for anthropogenic carbon. A recent study conducted a glider mission in the northwestern Mediterranean Sea and obtained valuable data regarding the carbon dynamics and the start of a phytoplankton bloom.
Article
Ecology
Liliane Merlivat, Michael Hemming, Jacqueline Boutin, David Antoine, Vincenzo Vellucci, Melek Golbol, Gareth A. Lee, Laurence Beaumont
Summary: The onset of the phytoplankton spring bloom is triggered by higher light levels and decreased wind strength, leading to a shallower mixing layer. This results in increased carbon uptake by phytoplankton and a switch from negative to positive air-sea net heat flux, which contributes to the seasonal evolution of surface pCO(2) and atmospheric CO2 reduction.
Article
Geosciences, Multidisciplinary
Gilles Reverdin, Claire Waelbroeck, Catherine Pierre, Camille Akhoudas, Giovanni Aloisi, Marion Benetti, Bernard Bourles, Magnus Danielsen, Jerome Demange, Denis Diverres, Jean-Claude Gascard, Marie-Noelle Houssais, Herve Le Goff, Pascale Lherminier, Claire Lo Monaco, Herle Mercier, Nicolas Metzl, Simon Morisset, Aicha Naamar, Thierry Reynaud, Jean-Baptiste Sallee, Virginie Thierry, Susan E. Hartman, Edward W. Mawji, Solveig Olafsdottir, Torsten Kanzow, Anton Velo, Antje Voelker, Igor Yashayaev, F. Alexander Haumann, Melanie J. Leng, Carol Arrowsmith, Michael Meredith
Summary: The characteristics and uncertainties of the CISE-LOCEAN seawater isotope dataset (delta O-18, delta H-2, referred to as delta D) are presented in this article. The dataset covers a wide timespan from 1998 to 2021 and includes a large number of data entries. The analysis methods and sources of uncertainties are discussed, including instrumental uncertainty and the isotopic composition of in-house standards. The importance of sample conservation and the need for caution when merging datasets from different laboratories are also highlighted.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Meteorology & Atmospheric Sciences
Lohitzune Solabarrieta, Ismael Hernandez-Carrasco, Anna Rubio, Michael Campbell, Ganix Esnaola, Julien Mader, Burton H. Jones, Alejandro Orfila
Summary: The study presents a Lagrangian-based short-term prediction system for ocean currents, which compares with alternative methods to quantify errors and conducts a sensitivity analysis to determine its applicability limits.
Article
Meteorology & Atmospheric Sciences
Anastasiia Tarasenko, Alexandre Supply, Nikita Kusse-Tiuz, Vladimir Ivanov, Mikhail Makhotin, Jean Tournadre, Bertrand Chapron, Jacqueline Boutin, Nicolas Kolodziejczyk, Gilles Reverdin
Summary: The variability of surface water masses of the Laptev and the East Siberian seas in August-September 2018 was studied using in situ and satellite data. The DMI and SMOS products were found to be adequate to describe large surface gradients in this region, and the SST-SSS diagram based on satellite estimates showed the transformation of water masses and freshwater displacement.