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3,583 results for “elevations”
Digital Elevation Models (DEMs) after the Shovi (Caucasus) debris flow, 13 August 2023
<p>===========================</p><p>Introduction</p><p>On 4 August 2023, a large debris flow struck the mountain resort town of Shovi in Georgia. More on this event here : <a href="https://eos.org/thelandslideblog/the-4-august-2023-debris-flow-at-shovi-in-georgia">https://eos.org/thelandslideblog/the-4-august-2023-debris-flow-at-shovi-in-georgia</a></p><p>Two Pléiades stereo images were acquired after the event on 13 August 2023, thanks to the activation of the CIEST² (<a href="https://www.poleterresolide.fr/ciest-2-nouvelle-generation-2/">https://www.poleterresolide.fr/ciest-2-nouvelle-generation-2/</a>) scheme.</p><p>We share here the Pléiades DEMs derived from these images. The collection includes four files:</p><p>Shovi_2023-08-13a_DEM_2m.tif</p><p>Shovi_2023-08-13a_DEM_20m.tif</p><p>Shovi_2023-08-13b_DEM_2m.tif</p><p>Shovi_2023-08-13b_DEM_20m.tif</p><p>===========================</p><p>Methods</p><p>The Pléiades stereo-images were processed using the Ames Stereo Pipeline (ASP, Beyer et al., 2018), yielding a DEM in 2x2m and 20x20 m GSD and an orthoimage in 0.5x0.5m GSD. The processing was done using as only input the stereo-images and their orientation information, as Rational Polynomial Coefficients (RPCs). The parallel_stereo routine performs all the steps needed in the correlation of the stereo-images, yielding a pointcloud which is then interpolated using the routine point2dem. We used the semi global matching algorithm and the set of processing parameters from Deschamps-Berger et al. (2020)</p><p>Beyer, R. A., Alexandrov, O., and McMichael, S.: The Ames Stereo Pipeline: NASA's Open Source Software for Deriving and Processing Terrain Data, Earth and Space Science, 5, 537–548, https://doi.org/10.1029/2018EA000409, 2018.</p><p>Deschamps-Berger, C., Gascoin, S., Berthier, E., Deems, J., Gutmann, E., Dehecq, A., Shean, D., and Dumont, M.: Snow depth mapping from stereo satellite imagery in mountainous terrain: evaluation using airborne laser-scanning data, The Cryosphere, 14, 2925–2940, https://doi.org/10.5194/tc-14-2925-2020, 2020.<br><br>===========================</p><p>Data Specifications:</p><p>Cartographic projection: UTM zone 38N (EPSG:32638)</p><p>Origin of Elevation: meters above WGS84 ellipsoid</p><p>Raster data format: GeoTIFF</p><p>NoData value : -9999</p><p>Pléiades dataset includes only DEMs because a licence needs to be signed with CNES to access Pléiades imagery. Please contact the authors for further information on this.</p><p>===========================</p><p>Acknowledgements: </p><p>Pléiades images were provided under the CIEST² initiative (CIEST2 is part of ForM@Ter (https://en.poleterresolide.fr/) (Pléiades © CNES 2023, distribution AIRBUS DS)</p><p>===========================</p><p>Dataset Attribution:</p><p>This dataset is licensed under a Creative Commons CC BY-NC 4.0 International License (Attribution-NonCommercial).</p><p>===========================</p><p>Citation:</p><p>Please cite this repository as described below:</p><p>Etienne Berthier. (2023). Digital Elevation Models (DEMs) after the Shovi flood (Caucasus), 13 August 2023</p>
Data from: Elevational range sizes of woody plants increase with climate variability in the Tropical Andes
<p><strong>Aim</strong>:<strong> </strong>The climate variability hypothesis proposes that species subjected to wide variation in climatic conditions will evolve wider niches, resulting in larger distributions. We test this hypothesis in tropical plants across a broad elevational gradient; specifically, we use a species-level approach to evaluate whether elevational range sizes are explained by the levels of thermal variability experienced by species.</p> <p><strong>Location</strong>:<strong> </strong>Central Andes</p> <p><strong>Time period</strong>:<strong> </strong>Present day</p> <p><strong>Taxon</strong>: Woody plants</p> <p><strong>Methods</strong>: Combining data from 479 forest plots, we determined the elevational distributions of nearly 2300 species along an elevational gradient (~209 – 3800 m). For each species, we calculated the maximum annual variation in temperature experienced across its elevational distribution. We used phylogenetic generalized least square models to evaluate the effect of thermal variability on range size. Our models included additional covariates that might affect range size: body size, local abundance, mean temperature and total precipitation. We also considered interactions between thermal variability and mean temperature or precipitation. To account for geometric constraints, we repeated our analyses with a standardized measure of range size, calculated by comparing observed range sizes with values obtained from a null model. </p> <p><strong>Results</strong>: Our results supported the main prediction of the climate variability hypothesis. Thermal variability had a strong positive effect on the range size, with species exposed to higher thermal variability having broader elevational distributions. Body size and local abundance also had positive, yet weak effects, on elevational range size. Furthermore, there was a strong positive interaction between thermal variability and mean annual temperature.</p> <p><strong>Main conclusions</strong>: Thermal variability had an overriding importance in driving elevational range sizes of woody plants in the Central Andes. Moreover, the relationship between thermal variability and range size might be even stronger in warmer regions, underlining the potential vulnerability of tropical montane floras to the effects of global warming.</p>
Computer-Delivered Intervention for Individuals With Obesity and Elevated Anxiety Sensitivity
ClinicalTrials.gov study NCT03917901. IPD Sharing: NO. Countries: 1. Publications: 0.
Cangrelor in ST-Elevation Myocardial Infarction to Decrease Infarct Size
ClinicalTrials.gov study NCT03043274. IPD Sharing: NO. Countries: 1. Publications: 6.
Biobehavioral Efficacy of the Semi-Elevated Side-Lying Position
ClinicalTrials.gov study NCT04942106. IPD Sharing: YES. Countries: 1. Publications: 1.
Single Catheter Primary Percutaneous Coronary Intervention Method in Patients With ST Elevation Myocardial Infarction
ClinicalTrials.gov study NCT05604976. IPD Sharing: NO. Countries: 1. Publications: 7.
Pulse Glucocorticoid Therapy in Patients With ST-Segment Elevation Myocardial Infarction
ClinicalTrials.gov study NCT05462730. IPD Sharing: NO. Countries: 1. Publications: 2.
MBCT Delivered Via Group Videoconferencing for ACS Patients With Elevated Depression Symptoms
ClinicalTrials.gov study NCT03878160. IPD Sharing: NO. Countries: 1. Publications: 111.
A Placebo-controlled Study of Volixibat in Subjects With Elevated Serum Bile Acids Associated With Intrahepatic Cholestasis of Pregnancy (OHANA)
ClinicalTrials.gov study NCT04718961. IPD Sharing: Not stated. Countries: 3. Publications: 1.
Efficacy and Safety of Sotagliflozin in Young Adult Patients With Type 1 Diabetes Mellitus and Elevated Hemoglobin A1C
ClinicalTrials.gov study NCT02383940. IPD Sharing: Not stated. Countries: 1. Publications: 1.
HeartMate 3 ELEVATE™ Registry
ClinicalTrials.gov study NCT02497950. IPD Sharing: Not stated. Countries: 11. Publications: 3.
Elevation of the Fetal Buttocks Prior to External Cephalic Version
ClinicalTrials.gov study NCT04538261. IPD Sharing: NO. Countries: 1. Publications: 5.
A Study to Evaluate the Safety and Efficacy of MEDI6012 in Acute ST Elevation Myocardial Infarction
ClinicalTrials.gov study NCT03578809. IPD Sharing: YES. Countries: 10. Publications: 1.
Study of Rhopressa® for the Reduction of Elevated Intraocular Pressure in Patients With Glaucoma or Ocular Hypertension in a Real-world Setting
ClinicalTrials.gov study NCT03808688. IPD Sharing: NO. Countries: 1. Publications: 1.
A Comparison of Prasugrel at PCI or Time of Diagnosis of Non-ST Elevation Myocardial Infarction
ClinicalTrials.gov study NCT01015287. IPD Sharing: Not stated. Countries: 19. Publications: 7.
Pilot Study Testing a Web-Based Moral Elevation Intervention for Veterans With PTSD and Moral Injury
ClinicalTrials.gov study NCT03906240. IPD Sharing: YES. Countries: 1. Publications: 1.
68Ga-PSMA PET/CT in Detecting Prostate Cancer Recurrence in Patients With Elevated PSA After Initial Treatment
ClinicalTrials.gov study NCT02673151. IPD Sharing: NO. Countries: 1. Publications: 1.
Trial of Netarsudil for Prevention of Corticosteroid-induced Intraocular Pressure Elevation
ClinicalTrials.gov study NCT03248037. IPD Sharing: NO. Countries: 1. Publications: 3.
A Parallel Arm Phase 1b/2a Study of DKN-01 as Monotherapy or in Combination With Docetaxel for the Treatment of Advanced Prostate Cancer With Elevated DKK1
ClinicalTrials.gov study NCT03837353. IPD Sharing: YES. Countries: 1. Publications: 1.
Safety of Urate Elevation in Parkinson's Disease
ClinicalTrials.gov study NCT00833690. IPD Sharing: Not stated. Countries: 1. Publications: 2.
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OpenNeuro
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