Results 51 to 60 of about 238,924 (290)

4DVarNet-SSH: end-to-end learning of variational interpolation schemes for nadir and wide-swath satellite altimetry [PDF]

arXiv, 2022
The reconstruction of sea surface currents from satellite altimeter data is a key challenge in spatial oceanography, especially with the upcoming wide-swath SWOT (Surface Ocean and Water Topography) altimeter mission. Operational systems however generally fail to retrieve mesoscale dynamics for horizontal scales below 100km and time-scale below 10 days.
arxiv  

Landscape Change and Threats to Conservation of River Dolphin Inia araguaiaensis (Cetacea: Iniidae) in the Brazilian Savanna

International Review of Hydrobiology, EarlyView.
ABSTRACT River dolphins are the least studied and most threatened cetaceans. Anthropogenic activities, including habitat fragmentation, pollution, and declining fish stocks, pose significant challenges to their survival. This study evaluated the effects of landscape changes resulting from human activity on the encounter rates of the putative species of
Cristiane Gonçalves de Moraes, Miriam Marmontel, Mariana Paschoalini Frias, Marcelo Oliveira‐da‐Costa, Paulo De Marco Junior   +4 more
wiley   +1 more source

Uncertain Flow Visualization using LIC [PDF]

, 2009
In this paper we look at the Line Integral Convolution method for flow visualization and ways in which this can be applied to the visualization of two dimensional, steady flow fields in the presence of uncertainty. To achieve this, we start by studying
Allendes Osorio, RS, Brodlie, KW
core   +1 more source

Balancing agriculture and environment: Andrew Sharpley's nutrient, soil, and water management legacy

Journal of Environmental Quality, EarlyView.
Abstract Managing agricultural phosphorus (P) to balance food security and water quality priorities is a massive challenge fraught with uncertainty and competing interests. Throughout his career, Andrew Sharpley addressed this challenge by building our understanding of the fundamental principles and processes that control P behavior in agricultural ...
D. N. Flaten, P. J. A. Kleinman, D. L. Osmond   +2 more
wiley   +1 more source

Improvements of the Discrete Dipole Approximation method [PDF]

Optics Letters 1997, volume 22, number 16, 1205-1207, 2000
The discrete-dipole approximation (DDA) is a flexible technique for computing scattering and absorption by targets of arbitrary geometry. In this paper we perform systematic study of various non-stationary iterative (conjugate gradient) methods in search for the most efficient one in order to solve the system of equations arising in DDA.
arxiv  

Through the lens of phosphorus: The legacy of Andrew Sharpley

Journal of Environmental Quality, EarlyView.
Abstract The pursuit of sustainable phosphorus (P) management represents a long‐standing challenge in agricultural arenas, with far‐reaching implications for the environment and societal development. Few scholars are as synonymous with P science as Andrew Sharpley.
Peter J. A. Kleinman, Don Flaten, Deanna Osmond, Helen Jarvie, Richard McDowell, Zachary Simpson, Joshua Mott   +6 more
wiley   +1 more source

The GNSS-R Eddy Experiment II: L-band and Optical Speculometry for Directional Sea-Roughness Retrieval from Low Altitude Aircraft [PDF]

arXiv, 2003
We report on the retrieval of directional sea-roughness (the full directional mean square slope, including MSS, direction and isotropy) through inversion of Global Navigation Satellite System Reflections (GNSS-R) and SOlar REflectance Speculometry (SORES)data collected during an experimental flight at 1000 m.
arxiv  

CRISPR/Cas9 Knockout of Shell Matrix Protein 1 in the Slipper‐Snail Crepidula atrasolea

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Methods for CRISPR/Cas9 shell matrix protein knockout in the snail, Crepidula atrasolea including optimizing RNP delivery and embryo husbandry, to the use of Sanger and MiSeq sequencing, and high‐content screening of embryos to characterize the loss of Shell Matrix Protein 1 (SMP1) during larval shell development.
Grant Batzel, Yiqun Wang, Antonia Bock, Elbereth Chen, Stephanie Neal, Rebecca N. Lopez‐Anido, Yoon Lee, Evan Tjeerdema, Emily Ignatoff, Tejasvi Patil, Gabriela Ramirez, Maryna P. Lesoway, Amro Hamdoun, Deirdre C. Lyons   +13 more
wiley   +1 more source

PARFAIT: GNSS-R coastal altimetry [PDF]

arXiv, 2003
GNSS-R signals contain a coherent and an incoherent component. A new algorithm for coherent phase altimetry over rough ocean surfaces, called PARFAIT, has been developed and implemented in Starlab's STARLIGHT GNSS-R software package. In this paper we report our extraction and analysis of the coherent component of L1 GPS-R signals collected during the ...
arxiv  

Oceanographic satellite remote sensing: Registration, rectification, and data integration requirements [PDF]

The problem of data integration in oceanography is discussed. Recommendations are made for technique development and evaluation, understanding requirements, and packaging techniques for speed, efficiency and ease of use.
Nichols, D. A.
core   +1 more source