Results 121 to 130 of about 6,775,722 (342)

Beyond the Chart: The use of Satellite Remote Sensing for Assessing the Adequacy and Completeness Information [PDF]

open access: yes, 2012
Chart adequacy and completeness information consists of the symbols, abbreviations and warnings used to inform mariners of the level of confidence that should be given to data on a nautical chart.
Alexander, Lee   +4 more
core   +1 more source

Growth history of fault-related folds and interaction with seabed channels in the toe-thrust region of the deep-water Niger delta [PDF]

open access: yes, 2015
The deep-water fold and thrust belt of the southern Niger Delta has prominent thrusts and folds oriented perpendicular to the regional slope that formed as a result of the thin-skinned gravitational collapse of the delta above overpressured shale.
Jolly, BA, Lonergan, L, Whittaker, A
core   +1 more source

300 Years of Degradation in Wales Estuaries and Coasts

open access: yesNatural Resources Forum, EarlyView.
ABSTRACT The world's oceans are in a severe state of degradation, yet our understanding of that degradation is often based on changes observed only in the past 20–50 years. This narrow view leads to marine conservation efforts that aim to preserve already degraded ecosystems, shaped by shifted ecological baselines.
Richard K. F. Unsworth   +3 more
wiley   +1 more source

Seafloor mapping in the Arctic: support for a potential U.S. extended continental shelf [PDF]

open access: yes, 2010
For the United States, the greatest opportunity for an extended continental shelf under UNCLOS is in the ice-covered regions of the Arctic north of Alaska.
Armstrong, Andy   +3 more
core   +2 more sources

Quaternary sediment patterns in the Weddell Sea: relations and environmental conditions [PDF]

open access: yes, 1988
Sediment patterns such as texture, composition, and facies from three selected areas of the Antarctic continental margin of the Weddell Sea are discussed in relation to environmental variations of the Quaternary hydrosphere and kryosphere.
Fütterer, Dieter   +2 more
core   +1 more source

Climatic–Anthropogenic Synergy Drives Escalating Minimum Area Requirements and Connectivity‐Protection Mismatch in a Karst‐Endemic Primate

open access: yesIntegrative Zoology, EarlyView.
Climate change and anthropogenic activities drive antagonistic degradation of landscape connectivity for endangered François’ langur (1987–2024), causing 48.8% habitat loss, north‐south fragmentation, and centroid migration (1.2 km/yr). Despite protected areas buffering connectivity, static management fails dynamic priority habitats; we propose ...
Guangmei Yang   +5 more
wiley   +1 more source

Flow‐pattern evolution of the Scandinavian Ice Sheet indicated by the subglacial lineation record over Norway, Sweden and Finland

open access: yesBoreas, EarlyView.
We present a 25‐stage reconstruction of the ice‐flow pattern evolution of the Scandinavian Ice Sheet based on mapping and analysis of ~240 000 subglacial lineations and lineation fields across Norway, Sweden, Finland, and parts of NW Russia. Our reconstruction uses a glacial geomorphological inversion approach, in which we generated 611 individual ...
Frances E. G. Butcher   +9 more
wiley   +1 more source

Denoising of Photon-Counting LiDAR Bathymetry Based on Adaptive Variable OPTICS Model and Its Accuracy Assessment

open access: yesRemote Sensing
Spaceborne photon-counting LiDAR holds significant potential for shallow-water bathymetry. However, the received photon data often contain substantial noise, complicating the extraction of elevation information.
Peize Li   +4 more
doaj   +1 more source

New localities for Crustacea Decapoda in the Magellan region, southern South America

open access: yesScientia Marina, 1999
We report the occurrence of Lithodes turkayi (Anomura), Libidoclaea granaria, and C. edwardsii (Brachyura), in the Beagle Channel. This observation extends their range of distribution south of the previously reported limit of the Straits of Magellan ...
Julio H. Vinuesa   +2 more
doaj   +1 more source

Bathymetric distribution and movements of red mullet Mullus surmuletus [PDF]

open access: yesMarine Ecology Progress Series, 1998
A Machias, S Somarakis, N Tsimenides
openaire   +1 more source

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