18 papers · ranked by Valyu relevance
Eric Gilbertson, Larry Signani, Kathryn Stanchak
The elevation of Mount Rainier was last surveyed in 2010 by the Land Surveyors Association of Washington. More recent LiDAR data and observational reports have indicated that the historical highest point on the mountain, Columbia Crest, has lost a significant amount of elevation and may no longer be the highest point.
Matthew Gilbertson
Not all nations on earth have previously been surveyed accurately enough to know for certain which peak is the national highpoint, the highest peak in the country. Knowledge of these peaks is important for understanding the physical geography of these countries in terms of natural resource availability, watershed…
Giuseppe Amatulli, Daniel McInerney, Tushar Sethi, Peter Strobl + 1 more
'Sami Domisch'] Topographical relief comprises the vertical and horizontal variations of the Earth’s terrain and drives processes in geomorphology, biogeography, climatology, hydrology and ecology. Its characterisation and assessment, through geomorphometry and feature extraction, is fundamental to numerous…
Jiří Doležal, Kirill Korznikov, Vaclav Bazant, Adam Taylor Ruka + 1 more
Understanding how tropical trees respond to complex environmental gradients is essential for predicting forest resilience under climate change. We examined variation in key leaf traits, including specific leaf area (SLA), foliar nitrogen (N) and phosphorus (P), C:N and N:P ratios, and stable isotope composition…
Shrivathsan Narayanan, Okuary Osechas, Jaroslaw Pytka
This paper introduces a technique to transform between geometric and barometric estimates of altitude and vice-versa. Leveraging forecast numerical weather models, the method is unbiased and has a vertical error with a standard deviation of around 30 m (100 ft), regardless of aircraft altitude, which makes it…
Maksymilian Solarski, Robert Machowski, Mariusz Rzetala, Martyna A. Rzetala
'Martyna A. Rzetala'] The impact of multiple years of underground mining of minerals on changes in the elevation of an urban area has been evaluated using the case study of Bytom in southern Poland. Between 1883 and 2011, that city experienced changes in absolute minimum (from 250.0 to 243.0 m a.s.l.) and maximum (from…
Kai Xu
Elevation has long been the standard for quantifying the relief of mountains and other landforms on Earth and beyond. Nevertheless, elevation has its limitations. By itself, a location's elevation reveals little about its vertical position relative to its surroundings, especially for seabed and extraterrestrial…
Matthew Gilbertson
Not all nations on earth have previously been surveyed accurately enough to know for certain which peak is the national highpoint, the highest peak in the country. Knowledge of these peaks is important for understanding the physical geography of these countries in terms of natural resource availability, watershed…
Matthew Gilbertson
Not all nations on earth have previously been surveyed accurately enough to know for certain which peak is the national highpoint, the highest peak in the country. Knowledge of these peaks is important for understanding the physical geography of these countries in terms of natural resource availability, watershed…
Jaime J. Carrera-Hernández
Mexico has used two vertical datums-the U.S. National Geodetic Vertical Datum of 1929 (NGVD29) and the North American Vertical Datum of 1988 (NAVD88). Because Mexico started using the NAVD88 as its vertical datum in 2015, most of Mexico’s data is referenced to the NGVD29 and recent high resolution data are referenced…
Shuntaro Watanabe, Yuri Maesako, Tomoya Inada
Plant species richness is influenced by complex interactions between biotic and abiotic factors that operate on different spatial scales. Since spatial scales vary continuously in nature, it is expected that multiple factors simultaneously affect species richness and composition at an intermediate spatial scale (i.e.…
Matthew Gilbertson
Not all nations on earth have previously been surveyed accurately enough to know for certain which peak is the national highpoint, the highest peak in the country. Knowledge of these peaks is important for understanding the physical geography of these countries in terms of natural resource availability, watershed…
Fernando P. Gaona, Sylvain Delabye, Vincent Maicher, Szabolcs Sáfián + 6 more
Niche breadth is a key ecological trait influencing species’ distribution, persistence, vulnerability to environmental change, and interspecific interactions. While the elevational niche-breadth hypothesis predicts broader ecological niches at higher elevations due to increased environmental stress and heterogeneity…
Mario Alamo, Hugo Alejandro Álvarez, Mario Mingarro, Robert J. Wilson
Researching the properties of mutualistic networks over environmental gradients is a promising but underexplored means to test how global change can affect ecosystem assembly and functioning. We examined how elevation and microclimate influenced butterfly-flower interaction networks at the hottest time of year in a…
Andy R. Griffiths, Miles R. Silman, William Farfán Rios, Kenneth J. Feeley + 4 more
Understanding how evolutionary constraints shape the elevational distributions of tree lineages provides valuable insight into the future of tropical montane forests under global change. With narrow elevational ranges, high taxonomic turnover, frequent habitat specialisation, and exceptional levels of endemism…
Gerald M. Cobian, Cameron Egan, Anthony S. Amend
Specialized associations between interacting species are a fundamental determinant of the diversity and distribution of both partners. How specialization of guilds of organisms varies along environmental gradients underpins popular theories of biogeography and macroecology, whereas the degree of specialization of a…
Robert Tenzer, Albertini Nsiah Ababio, Carmine Serio
It is acknowledged that a classical definition of the geoid-to-quasigeoid separation as a function of the simple planar Bouguer gravity anomaly is compatible with Helmert’s definition of orthometric heights. According to Helmert, the mean actual gravity along the plumbline between the geoid and the topographic surface…
ChaoJiu Da, BingLu Shen, PengCheng Yan, DeShan Ma + 2 more
'Zhen Jin'] We consider the shallow water equation and the vorticity equations for a variable height of topography. On the assumptions that the atmosphere is incompressible and a constant density, we simplify the coupled dynamic equations. The change in topographic height is handled as the sum of the inherent and…