Results 51 to 60 of about 1,848,819 (300)

Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean

Journal of Advances in Modeling Earth Systems, 2022
This study develops a new regional model of the Southern Ocean including an improved representation of the iron biogeochemistry and ecosystem component, nesting within a biogeochemical ocean state estimate, and benchmarking with a suite of observations ...
Takamitsu Ito
doaj   +1 more source

Spatial variations in silicate-to-nitrate ratios in Southern Ocean surface waters are controlled in the short term by physics rather than biology [PDF]

Biogeosciences, 2020
The nutrient composition (high in nitrate but low in silicate) of Subantarctic Mode Water (SAMW) forces diatom scarcity across much of the global surface ocean. This is because diatoms cannot grow without silicate. After formation and downwelling at the
P. Demuynck, T. Tyrrell, A. Naveira Garabato, M. C. Moore, A. P. Martin   +4 more
doaj   +1 more source

Delivering Sustained, Coordinated, and Integrated Observations of the Southern Ocean for Global Impact

Frontiers in Marine Science, 2019
The Southern Ocean is disproportionately important in its effect on the Earth system, impacting climatic, biogeochemical and ecological systems, which makes recent observed changes to this system cause for global concern.
Louise Newman, P. Heil, Rowan Trebilco, K. Katsumata, A. Constable, E. V. van Wijk, K. Assmann, J. Beja, P. Bricher, R. Coleman, D. Costa, S. Diggs, R. Farneti, S. Fawcett, S. Gille, K. Hendry, S. Henley, E. Hofmann, T. Maksym, M. Mazloff, A. Meijers, M. Meredith, S. Moreau, Burcu Ozsoy, R. Robertson, I. Schloss, O. Schofield, Jiuxin Shi, E. Sikes, I. Smith, S. Swart, A. Wåhlin, G. Williams, M. Williams, L. Herraiz‐Borreguero, S. Kern, J. Lieser, R. Massom, J. Melbourne‐Thomas, P. Miloslavich, G. Spreen   +40 more
semanticscholar   +1 more source

Unraveling Quantitative Sensing Mechanism and Predictive Molecular Metrics for High‐Performance OFET Amine Sensors

Advanced Functional Materials, EarlyView.
This study introduces a novel chloro boron subphthalocyanine/polymer blend OFET sensor achieving 0.005 ppb limit of detection for ammonia at room temperature and high selectivity against similar amines. An original theoretical framework is proposed to describe the sensing mechanism, relating analyte molecular volume and Lewis basicity to sensor ...
Kavinraaj Ella Elangovan, Matthew P. Confer, Rui Zhang, Siqing Wang, Jeffrey S. Moore, Rohit Bhargava, Ying Diao   +6 more
wiley   +1 more source

Sensitivity of Ocean Carbon Sink Estimates to Rare Observations

Geophysical Research Letters
We evaluate the impact of new data in the annual release of SOCATv2024 on air‐sea carbon dioxide (CO2) flux reconstructions. Using the pCO2‐Residual and LDEO‐HPD methods, we reconstruct surface ocean fCO2 based on SOCATv2023 and SOCATv2024.
Amanda R. Fay, Thea H. Heimdal, Viviana Acquaviva, Abby P. Shaum, Galen A. McKinley   +4 more
doaj   +1 more source

Label‐Free SERS Fingerprinting of Neuroprotein Conformational Dynamics in Human Saliva

Advanced Materials, EarlyView.
Galvanic molecular entrapment (GME) is a label‐free method for detecting and quantifying neuroprotein conformational states. This technique enables direct surface binding and in situ hotspot generation around molecules, effectively overcoming challenges related to target localization and mismatched hotspot geometries.
Muhammad Shalahuddin Al Ja'farawy, Jun‐Yeong Yang, Chaewon Mun, Seunghun Lee, Chul Bum Cho, Yoo Hyun Um, Min‐Young Lee, Sung‐Gyu Park, Dong‐Ho Kim, Seung Ho Yang, Ho Sang Jung   +10 more
wiley   +1 more source

Antarctic Bottom Water Sensitivity to Spatio‐Temporal Variations in Antarctic Meltwater Fluxes

Geophysical Research Letters, 2023
Ice sheet melting into the Southern Ocean can change the formation and properties of the Antarctic Bottom Water (AABW). Ocean models often mimic ice sheet melting by adding freshwater fluxes in the Southern Ocean under diverse spatial distributions.
Wilton Aguiar, Sang‐Ki Lee, Hosmay Lopez, Shenfu Dong, Hélène Seroussi, Dani C. Jones, Adele K. Morrison   +6 more
doaj   +1 more source

Zinc and nickel isotopes in seawater from the Indian Sector of the Southern Ocean: The impact of natural iron fertilization versus Southern Ocean hydrography and biogeochemistry

Chemical Geology, 2019
The Southern Ocean is the site of 20% of global ocean carbon export, and the origin of water masses that significantly impact the chemistry of the global ocean. Much of the Southern Ocean is a high nutrient low chlorophyll (HNLC) region.
Ruo-Mei Wang, C. Archer, A. Bowie, D. Vance   +3 more
semanticscholar   +1 more source

Design of a Cobalt‐Free Maraging Steel with Ultra‐High Strength of 2.3 GPa Through Additive Manufacturing

Advanced Science, EarlyView.
A computationally designed, cobalt‐free maraging steel tailored for additive manufacturing achieves an ultra‐high tensile strength of 2.3 GPa with 5.7% elongation. This exceptional strength‐ductility synergy stems from high‐density core‐shell Ni3Ti/NiAl nanoprecipitates, a crack‐resistant composition, and a fine equiaxed grain structure enabled by ...
Hu Li, Shubo Gao, Liming Tan, Weiming Ji, Liuliu Han, Kun Zhou, Yong Liu   +6 more
wiley   +1 more source

Vertical eddy iron fluxes support primary production in the open Southern Ocean

Nature Communications, 2019
The primary productivity of the Southern Ocean ecosystem is limited by iron availability. Away from benthic and aeolian sources, iron reaches phytoplankton primarily when iron-rich subsurface waters enter the euphotic zone.
T. Uchida, D. Balwada, Ryan P. Abernathey, Galen A. McKinley, Shafer K. Smith, M. Lévy   +5 more
semanticscholar   +1 more source