Article
Environmental Sciences
Tong Wang, Toshio Suga, Shinya Kouketsu
Summary: The density-compensated salinity anomalies in the upper North Pacific were investigated, and the freshening of the subtropical thermocline and the increase of salinity in the North Pacific Tropical Water were found. The interannual and longer spiciness anomalies were explained by the three-dimensional evolutions and their connections to the fate of three mode waters.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Qinbiao Ni, Xiaoming Zhai, J. H. LaCasce, Dake Chen, David P. Marshall
Summary: Although surface eddy kinetic energy (EKE) has been relatively well studied, our understanding of EKE in the ocean interior is limited. In this study, we propose a new method to estimate EKE throughout the global ocean. By combining satellite altimeter and Argo float data, we infer the vertical profile of eddies. The estimated eddy profiles show surface-intensification at low latitudes and deep-reaching characteristics at mid- and high latitudes, and are comparable to current meter velocity measurements.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Oceanography
Matthew B. B. Alkire, Stephen Riser
Summary: Net community production (NCP) in the Argentine Basin was estimated using nitrate profiles measured by biogeochemical Argo floats. Hydrographic fronts were defined based on potential density anomaly and potential temperature, with the latter being preferred. Monthly median profiles of nitrate were constructed for each zone, and NCP was estimated using three methods. The results showed a decline in NCP from south to north, with primary production during summer months possibly supported by regenerated nitrogen sources due to the scarcity of bioavailable iron.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Meteorology & Atmospheric Sciences
Guanghui Zhou, Rong-Hua Zhang
Summary: This study investigated the structure and evolution of density-compensated spiciness anomalies in the North Pacific thermocline using Argo observations. Two well-organized decadal spiciness events were identified, showing their propagation pathways and feedback on sea surface temperature variability.
ADVANCES IN ATMOSPHERIC SCIENCES
(2022)
Article
Ecology
Fuminori Hashihama, Hiroaki Saito, Taketoshi Kodama, Saori Yasui-Tamura, Jota Kanda, Iwao Tanita, Hiroshi Ogawa, E. Malcolm S. Woodward, Philip W. Boyd, Ken Furuya
Summary: The nutrient assimilation characteristics of subtropical phytoplankton were studied through deep-water addition incubation experiments, revealing variations in the drawdown ratios of dissolved inorganic nitrogen to phosphate at different stations. These ratios were influenced by phosphorus concentrations and phytoplankton species, indicating the complex nature of nutrient dynamics in subtropical oceans.
Article
Geochemistry & Geophysics
Claudia Adam, Valerie Vidal, Pablo Grosse, Mie Ichihara
Summary: This study investigates the response of subduction zones and volcanic arcs to the subduction of atypical oceanic lithosphere. The analysis of multidisciplinary data sets reveals the correlation between the subduction of different oceanic features and the increase or decrease of volcanism. The findings suggest that the patterns of volcanism are influenced by a combination of chemical and thermo-mechanical effects, as well as variations in the chemical signatures along hotspot chains.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Oceanography
Bowen Sun, Baofu Li, Jingyu Yan, Yuqi Zhou, Shuo Zhou
Summary: This study investigates the seasonal variation in the atmospheric response to oceanic mesoscale eddies in the North Pacific Subtropical Countercurrent, with findings showing that the impact of eddies on sea surface temperature and wind speed is stronger in winter, while their effect on precipitation rate is more significant in summer.
ACTA OCEANOLOGICA SINICA
(2022)
Article
Geochemistry & Geophysics
Hong-Yan Li, Chao Xie, Jeffrey G. Ryan, Christopher J. Spencer, Liang Liu, Yi-Gang Xu
Summary: The decomposition of serpentinite below the subducting slab played an important role in generating fluid/melt to fertilize the subarc mantle in the Kurile arc volcanic rocks. However, the classic model of decomposition of hydrous minerals in subducting marine sediments and altered basalts cannot explain the compositions of Kurile lavas. We propose that the decomposition of serpentinites from below the subducting slab led to extraction of Pb and Sr from relatively unaltered oceanic crust, suggesting a switch in subducting oceanic crust types occurred between 50 and 42 Ma.
Article
Oceanography
Lu Yiqun, Liu Qinyu, Xie Shang-Ping
Summary: The Subantarctic Mode Water forms in the Southern Ocean and spreads northward to the subtropical gyre. The Subtropical South Indian Countercurrent flows on the north flank of the SAMW layer, originating from the deep mixed layers of the southeastern Indian Ocean and moving along the subtropical gyre.
JOURNAL OF OCEAN UNIVERSITY OF CHINA
(2021)
Article
Geochemistry & Geophysics
John M. Rekoske, Morgan P. Moschetti, Eric M. Thompson
Summary: This study investigates the impact of basins and site effects on ground motions in the U.S. Pacific Northwest by analyzing recordings from crustal and intraslab earthquakes. The results show that basin depth and site indicators are related to the amplification of ground motions, and different regions exhibit distinct spatial amplification patterns.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Microbiology
Jie Kong, Xin Liu, Lei Wang, Hao Huang, Danyun Ou, Jiayu Guo, Edward A. Laws, Bangqin Huang
Summary: This study enhanced the understanding of the community structure and distribution patterns of marine bacteria in a subtropical oligotrophic ocean system and identified potentially important determinants of their structure. Results highlighted the significance of considering both quantitative and relative abundances of marine bacterial communities.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Xia Zhao, Guang Yang, Dongliang Yuan, Yazhou Zhang
Summary: Previous studies have shown that the tropical Indian Ocean basin mode (IOB) plays a role in the phase transition of ENSO, but they did not differentiate between the two types of ENSO. This study finds that the boreal winter-spring IOB is more likely to induce the central-Pacific (CP) ENSO than the eastern-Pacific ENSO one year later. The study also highlights the need to improve simulation of the IOB's contribution to ENSO diversity in CMIP5 models.
Article
Meteorology & Atmospheric Sciences
Xinyu Li, Riyu Lu
Summary: After the late 1970s, the westward extension of the western North Pacific subtropical high significantly affects rainfall over the Yangtze River basin. This is mainly due to the enhanced interannual variability of the WNPSH during this period, allowing for more effective induction of YRB rainfall anomalies through affecting the meridional gradient of equivalent potential temperature over the YRB.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Review
Meteorology & Atmospheric Sciences
Jia Sun, Yimin Huang, Jun Han, Xingping Zhang
Summary: The Western Pacific Subtropical High (WPSH) has varying influences on summer precipitation in the Dongting Lake basin, with specific indices having important effects in June, July, and August. Gridded data can partly reproduce these relationships, with GPCP precipitation data being more suitable for studying the relationship between precipitation and a single index of WPSH in the Dongting Lake Basin.
ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES
(2021)
Article
Oceanography
Donata Giglio, Gregory C. Johnson
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2016)
Article
Oceanography
Donata Giglio, Gregory C. Johnson
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2017)
Article
Oceanography
Donata Giglio, Sarah T. Gille, Aneesh C. Subramanian, San Nguyen
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2017)
Article
Oceanography
D. Giglio, V. Lyubchich, M. R. Mazloff
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2018)
Article
Oceanography
Donata Giglio, Dean Roemmich
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2014)
Article
Engineering, Ocean
Tyler Tucker, Donata Giglio, Megan Scanderbeg, Samuel S. P. Shen
JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
(2020)
Article
Environmental Sciences
Francis Joseph Turk, Svetla Hristova-Veleva, Donata Giglio
Summary: The study explores the variability of diurnal wind direction in tropical regions, generating a multi-year dataset by merging different satellite data. It finds that there are different degrees of variations in the zonal and meridional wind components in the tropical Pacific, possibly due to interactions between surface convergence and convective precipitation in ocean basins.
Article
Environmental Sciences
Donata Giglio, Sarah T. Gille, Bruce D. Cornuelle, Aneesh C. Subramanian, F. Joseph Turk, Svetla Hristova-Veleva, Devon Northcott
Summary: This study examines the diurnal variability of upper-ocean winds and finds that the amplitude of meridional winds is larger than zonal winds, with a peak in the tropical Pacific. The amplitude and phase of diurnal winds in the tropical oceans are not uniform over time, with larger differences in the meridional component throughout the year.
Article
Oceanography
Lauren Hoffman, Matthew R. Mazloff, Sarah T. Gille, Donata Giglio, Aniruddh Varadarajan
Summary: Atmospheric rivers and their rainfall have a significant impact on surface ocean salinity in the California Current System. This study shows that higher precipitation during the rainy season leads to a greater decrease in salinity over time. On shorter time scales, these atmospheric river events generate detectable changes in surface salinity, with the response depending on the amount of rainfall and wind speed. Higher wind speeds result in deeper mixing of freshwater inputs, while lower wind speeds allow a surface layer of freshwater to persist.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Kristopher B. Karnauskas, Donata Giglio
Summary: This study provides the first direct observations of topographic upwelling occurring at two prominent archipelagos in the equatorial Pacific using 22 years of Argo measurements. The results show a clear subsurface thermal fingerprint of vertical divergence near the Gilbert and Galapagos Islands, highlighting the importance of understanding the underlying physics for modeling and predicting tropical ecosystems.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Oceanography
Giovanni Seijo-Ellis, Donata Giglio, Haydee Salmun
Summary: The Virgin Islands basin (VIB) contains Marine Protected Areas (MPAs) that are important for unique spawning aggregations. The ecological structure in and around these MPAs is influenced by changes in near-surface water properties. Anomalously low near-surface salinity, consistent with the signature of Amazon plume waters, has been observed in the VIB. A Lagrangian Particle tracking model was used to track particles and identify water sources and pathways to the VIB. Three pathways were described, with salty Atlantic waters and low salinity waters from the Amazon contributing to salinity variability in the VIB.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Review
Multidisciplinary Sciences
Emily G. Simmonds, Kwaku Peprah Adjei, Christoffer Wold Andersen, Janne Cathrin Hetle Aspheim, Claudia Battistin, Nicola Bulso, Hannah M. Christensen, Benjamin Cretois, Ryan Cubero, Ivan A. Davidovich, Lisa Dickel, Benjamin Dunn, Etienne Dunn-Sigouin, Karin Dyrstad, Sigurd Einum, Donata Giglio, Haakon Gjerlow, Amelie Godefroidt, Ricardo Gonzalez-Gil, Soledad Gonzalo Cogno, Fabian Grosse, Paul Halloran, Mari F. Jensen, John James Kennedy, Peter Egge Langsaether, Jack H. Laverick, Debora Lederberger, Camille Li, Elizabeth G. Mandeville, Caitlin Mandeville, Espen Moe, Tobias Navarro Schroeder, David Nunan, Jorge Sicacha-Parada, Melanie Rae Simpson, Emma Sofie Skarstein, Clemens Spensberger, Richard Stevens, Aneesh C. Subramanian, Lea Svendsen, Ole Magnus Theisen, Connor Watret, Robert B. O'Hara
Summary: Quantifying and reporting the uncertainty associated with models is crucial in different scientific fields, and there is still limited knowledge about how different fields approach this issue.
Review
Environmental Sciences
Aneesh C. Subramanian, Magdalena A. Balmaseda, Luca Centurioni, Rajib Chattopadhyay, Bruce D. Cornuelle, Charlotte DeMott, Maria Flatau, Yosuke Fujii, Donata Giglio, Sarah T. Gille, Thomas M. Hamill, Harry Hendon, Ibrahim Hoteit, Arun Kumar, Jae-Hak Lee, Andrew J. Lucas, Amala Mahadevan, Mio Matsueda, SungHyun Nam, Shastri Paturi, Stephen G. Penny, Adam Rydbeck, Rui Sun, Yuhei Takaya, Amit Tandon, Robert E. Todd, Frederic Vitart, Dongliang Yuan, Chidong Zhang
FRONTIERS IN MARINE SCIENCE
(2019)
Review
Environmental Sciences
Benoit Meyssignac, Tim Boyer, Zhongxiang Zhao, Maria Z. Hakuba, Felix W. Landerer, Detlef Stammer, Armin Koehl, Seiji Kato, Tristan L'Ecuyer, Michael Ablain, John Patrick Abraham, Alejandro Blazquez, Anny Cazenave, John A. Church, Rebecca Cowley, Lijing Cheng, Catia M. Domingues, Donata Giglio, Viktor Gouretski, Masayoshi Ishii, Gregory C. Johnson, Rachel E. Killick, David Legler, William Llovel, John Lyman, Matthew Dudley Palmer, Steve Piotrowicz, Sarah G. Purkey, Dean Roemmich, Rmy Roca, Abhishek Savita, Karina von Schuckmann, Sabrina Speich, Graeme Stephens, Gongjie Wang, Susan Elisabeth Wijffels, Nathalie Zilberman
FRONTIERS IN MARINE SCIENCE
(2019)