Results 11 to 20 of about 6,962 (202)

Beetle evolution illuminates the geological history of the World's most diverse tropical archipelago

Ecography, Volume 2023, Issue 12, December 2023., 2023
The geologically‐complex Indo–Australian–Melanesian archipelago (IAMA) hosts extraordinarily high levels of species richness and endemism and has long served as a natural laboratory for studying biogeography and evolution. Nonetheless, its geological history and the provenance and evolution of its biodiversity remain poorly understood. Here, we provide
Harald Letsch, Michael Balke, Dominik Kusy, Duane D. McKenna, Raden Pramesa Narakusumo, Katayo Sagata, Emmanuel F. A. Toussaint, Lloyd T. White, Alexander Riedel   +8 more
wiley   +1 more source

PPP at Low Latitudes With Ionospheric Model Exclusively Based on Single Frequency GNSS Measurements

Space Weather, Volume 21, Issue 8, August 2023., 2023
Abstract Single frequency users of the Global Navigation Satellite System (GNSS) should correct the ionospheric delay to obtain positioning solutions. A valuable source of ionospheric delay corrections is the global ionospheric models (GIMs) of Vertical Total Electron Content.
Ana L. Christovam, Fabricio S. Prol, Gabriel O. Jerez, Manuel Hernández‐Pajares, Paulo O. Camargo   +4 more
wiley   +1 more source

Chilean bee diversity: Contrasting patterns of species and phylogenetic turnover along a large‐scale ecological gradient

Ecosphere, Volume 14, Issue 5, May 2023., 2023
Abstract Chile's isolation and varied climates have driven the evolution of a unique biodiversity with a high degree of endemism. As a result, Chile encompasses diverse environments, including the Mediterranean‐type ecosystem, a global biodiversity hotspot.
Leon Marshall, John S. Ascher, Cristian Villagra, Amaury Beaugendre, Valentina Herrera, Patricia Henríquez‐Piskulich, Alejandro Vera, Nicolas J. Vereecken   +7 more
wiley   +1 more source

Two‐Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products

Space Weather, Volume 21, Issue 2, February 2023., 2023
Abstract Vertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so‐called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs). Although considerable research has been conducted to develop regional and global models, there is no clear ...
Gabriel O. Jerez, Manuel Hernández‐Pajares, Andreas Goss, Fabricio S. Prol, Daniele B. M. Alves, João F. G. Monico, Michael Schmidt   +6 more
wiley   +1 more source

Combination Strategy for the Geocentric Realization of Regional Epoch Reference Frames

Journal of Geophysical Research: Solid Earth, Volume 127, Issue 10, October 2022., 2022
Abstract For high‐resolution regional geodetic applications, the International Terrestrial Reference Frame (ITRF) is complemented by regional densifications. These are realized either as multi‐year solutions related to a tectonic plate (e.g., EUREF for Europe) or as epoch reference frames (ERFs) to capture nonlinear geophysical station motions caused ...
A. Kehm, L. Sánchez, M. Bloßfeld, M. Seitz, H. Drewes, D. Angermann, F. Seitz   +6 more
wiley   +1 more source

3D GNSS Velocity Field Sheds Light on the Deformation Mechanisms in Europe: Effects of the Vertical Crustal Motion on the Distribution of Seismicity

Journal of Geophysical Research: Solid Earth, Volume 127, Issue 6, June 2022., 2022
Abstract Crustal deformation and seismicity in Europe are still poorly understood. Seismic activity is classically ascribed to crustal strain rates generated by edge‐driven tectonic forces. However, crustal deformation is not only due to tectonic loading, but can also be related to isostatic and mantellic processes that induce additional stress and ...
Jesús Piña‐Valdés, Anne Socquet, Céline Beauval, Marie‐Pierre Doin, Nicola D’Agostino, Zheng‐Kang Shen   +5 more
wiley   +1 more source

Using InSAR Data to Improve the Water Vapor Distribution Downstream of the Core of the South American Low‐Level Jet

Journal of Geophysical Research: Atmospheres, Volume 127, Issue 7, 16 April 2022., 2022
Abstract Two and half years of Interferometric Synthetic Aperture Radar (InSAR) images obtained by Sentinel‐1 near Santa Cruz de la Sierra, Bolivia, before August 2019 are here analyzed and assimilated in the Weather Research and Forecast model (WRF) to assess the quality of the water vapor field at the core of the South American Low‐level Jet, and the
P. Mateus, P. M. A. Miranda
wiley   +1 more source

Procesamiento GNSS en el Marco Geodésico CR-SIRGAS: influencia de las épocas de observación y referencia

Ingeniería, 2022
Las observaciones satelitales derivadas de las constelaciones GNSS están totalmente correlacionas con el instante en la que se realizan las mediciones, sin embargo, los usuarios pueden trasladarlas a diferentes épocas siempre y cuando se cuente con los ...
Jorge Moya Zamora
doaj   +1 more source

Análise de dados geodésicos a partir do desenvolvimento de uma aplicação standalone

Revista Brasileira de Geomática, 2017
Neste trabalho desenvolveu-se uma aplicação standalone para análise de dados geodésicos das estações GNSS do Brasil que fazem parte da Rede Brasileira de Monitoramento Contínuo – RBMC e da Rede SIRGAS-CON.
Luciana Maria Da Silva, Leandro Mendes Ferreira, Silvana Phillipi Camboim, Silvio Rogério Correia De Freitas   +3 more
doaj   +1 more source

Recent variation of the Las Vacas Glacier Mt. Aconcagua region, Central Andes, Argentina, based on ASTER stereoscopic images [PDF]

, 2010
This work presents the results of the ASTER stereoscopic image processing to calculate the volume changes of Las Vacas Glacier. The processing of medium resolution satellite images (ASTER level 1A – pixel 15 m) from February 2001 and 2007 was performed ...
J. C. Leiva, L. Lenzano, M. G. Lenzano
core   +1 more source