Results 61 to 70 of about 42,645 (242)

An Algorithm for Sound Velocity Error Correction Using GA-SVR Considering the Distortion Characteristics of Seabed Topography Measured by Multibeam Sonar Mounted on Autonomous Underwater Vehicle

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Aiming to address the problem that autonomous underwater vehicle (AUV) with multibeam echo sounder system (MBES) for underwater topographic survey cannot autonomously obtain the sound velocity of the acoustic path to correct bathymetric data, this ...
Xiaohan Yu, Junsen Wang, Yang Cui, Shaohua Jin, Gang Bian, Na Chen   +5 more
doaj   +1 more source

Designing a Semantically Rich Visual Iinterface for Cultural Digital Libraries Using the UNESCO Multilingual Thesaurus [PDF]

, 2010
This paper reports on the design of a visual user interface for the UNESCO digital portal. The interface makes use of the UNESCO multilingual thesaurus to provide visualized views of terms and their relationships and the way in which spaces associated ...
Bieber, Mark, Bouchard, Matthew, Fiorentino, Carlos, Ruecker, Stan, Shiri, Ali, Stafford, Amy   +5 more
core  

Mackenzie River Freshwater Controls Early Sea Ice Formation in the Eastern Beaufort Sea

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Arctic sea ice plays a critical role in Earth's climate system, and as it continues to thin and retreat, understanding the processes driving its variability is increasingly important. Using satellite data and a coupled ocean–sea ice model, we examined how freshwater from the Mackenzie River influences fall sea ice formation in the Beaufort Sea.
M. J. Zahn, S. Fournier, I. G. Fenty, M. Steele, M. Wood, P. Gaube   +5 more
wiley   +1 more source

An Automatic Generalization Method of a Block-Based Digital Depth Model Based on Surface Curvature Features

Journal of Marine Science and Engineering
Addressing the limitations of current multi-scale seabed terrain construction methods for a Digital Depth Model (DDM) and the low computational efficiency of automatic generalization algorithms, this paper draws on the concept of curvature simplification
Dong Wang, Jian Dong, Lulu Tang, Mengkai Ma, Tian Xie   +4 more
doaj   +1 more source

Physical oceanography [PDF]

, 1992
The physical oceanography component of the AMLR program provides information on the hydrography of the upper water column with the objective of assessing its influence on the observed distribution of krill (Euphausia superba).
Amos, Anthony F., Heimann, J. K., Lavender, Margaret   +2 more
core   +1 more source

Tracking Baseflow Supply Dynamics Using SWOT Data From Small Groundwater‐Dominated Lakes

Hydrological Processes, Volume 40, Issue 2, February 2026.
Satellite‐based measurements of groundwater flow‐through kettle lakes efficiently track dynamic groundwater storage at local to regional scales (modified from USGS Scientific Investigations Report 2011–5137). ABSTRACT In situ surface‐water monitoring strategies are biased towards larger perennial streams and lakes and are generally not designed to ...
Martin A. Briggs, Merritt E. Harlan, David M. Rey, Danielle K. Hare, Denis R. LeBlanc, David F. Boutt, Michael N. Gooseff   +6 more
wiley   +1 more source

Future directions in hydrography using satellite-derived bathymetry [PDF]

, 2013
Satellite remote sensing provides useful reconnaissance tool for mapping near-shore bathymetry, characterizing a coastal area and monitoring any seafloor changes that may have occurred since the last hydrographic survey of the area.
Alexander, Lee, Armstrong, Andy, Azuike, Chukwuma, Parrish, Christopher, Pe\u27eri, Shachak, Sault, Maryellen   +5 more
core   +1 more source

Assessing Regional Variation in the Relationships Between Local Stream Characteristics and Culvert Barrier Attributes Relative to Fish Passage

River Research and Applications, Volume 42, Issue 2, Page 368-388, February 2026.
ABSTRACT Stream fragmentation is a leading threat to freshwater fish diversity and is often caused by the installation of impassable culverts at road–stream crossings. In the United States alone, millions of culverts contribute to this fragmentation. Therefore, estimating culvert barrier impact on aquatic organism passage and prioritizing barriers for ...
Ridge Sliger, Kathleen Hoenke, Brandon Peoples   +2 more
wiley   +1 more source

Method for Delineating the Formula Limit of the Continental Shelf under the Maximum Area Principle Constraint

Journal of Marine Science and Engineering
In current practices of determining continental shelf area, the measured sediment thickness data do not effectively reflect the distribution of sediments across the area due to its dispersed nature.
Tian Xie, Jian Dong, Lulu Tang, Mengkai Ma, Dong Wang   +4 more
doaj   +1 more source

Variation in the seston C:N ratio of the Arctic Ocean and pan-Arctic shelves [PDF]

, 2014
Studying more than 3600 observations of particulate organic carbon (POC) and particulate organic nitrogen (PON), we evaluate the applicability of the classic Redfield C:N ratio (6.6) and the recently proposed Sterner ratio (8.3) for the Arctic Ocean and ...
Andersen, Tom, Bellerby, Richard G. J., Frigstad, Helene, Hessen, Dag O., Silyakova, Anna   +4 more
core   +1 more source