A5089621966- Polar Research and Ecology
- Cryospheric studies and observations
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Biocrusts and Microbial Ecology
- Coastal and Marine Management
- Adventure Sports and Sensation Seeking
- Geographic Information Systems Studies
- Environmental and Cultural Studies in Latin America and Beyond
- Methane Hydrates and Related Phenomena
- Species Distribution and Climate Change
- Aeolian processes and effects
- Atmospheric and Environmental Gas Dynamics
- Landslides and related hazards
- Urban Heat Island Mitigation
- Historical Geography and Cartography
- Winter Sports Injuries and Performance
- Paleontology and Stratigraphy of Fossils
- Marine and coastal plant biology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Conservation, Biodiversity, and Resource Management
- Arctic and Russian Policy Studies
- Geography and Environmental Studies
Universidade Federal do Rio Grande do Sul
2016-2025
University of Rio Grande and Rio Grande Community College
2014-2023
Instituto de Geociencias
2001-2022
Universidade Federal do Rio Grande
2021
University of Bonn
2012
National Council for Scientific and Technological Development
2002
University of Freiburg
2001
Abstract A Système probatoire pour l’observation de la terre (SPOT) mosaic of King George Island, the largest (1250 Km 2 ) South Shetland Islands, West Antarctica, shows its major morphological features. Three main ice domes and 70 glacier drainage basins, covering 92.7% Island area, strongly controlled by subglacial morphology drained relatively fast-moving tidewater outlet glaciers, were delineated. general retreat fronts through four decades, more intensely on eastern side island (to...
Urbanization in large cities has altered the urban thermal balance, creating heat islands. In this context, green areas are crucial regulating climate. This study uses remote sensing data to evaluate their performance using fractional vegetation cover (FVC) and its impact on land surface temperature (LST) Metropolitan Lima, Peru, between 1986 2024. The spatial temporal relationship FVC LST is analyzed, districts classified based effectiveness regulation. Mann–Kendall test was applied...
A new topographic database for King George Island, one of the most visited areas in Antarctica, is presented. Data from differential GPS surveys, gained during summers 1997/98 and 1999/2000, were combined with up to date coastlines a SPOT satellite image mosaic, information maps as well Antarctic Digital Database. digital terrain model (DTM) was generated using ARC/INFO GIS. From contour lines derived DTM mosaic map assembled. Extensive on data accuracy, criteria applied select place names...
The aim of this work is to produce a simplified vegetation map ice-free areas the Fildes Peninsula (FP) and Ardley Island (AI) thought object-oriented classification using QuickBird satellite image evaluate influence global solar radiation (GSR) over distribution. data were generated from multiresolution segmentation panchromatic infrared layers, for we calculated normalized vegetative difference index (NVDI) green NVDI. Two classes created – Lichen Moss Cushion SubFormation Subformation...
Bijeesh Kozhikkodan Veettilab*, Ulisses Franz Bremerab, Sergio Florêncio de Souzaa, Éder Leandro Bayer Maierc & Jefferson Cardia Simõesba Centro Estadual Pesquisas em Sensoriamento Remoto e Meteorologia (CEPSRM), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazilb Polar Climático (CPC), Brazilc Institute Social and Information Science, (FURG), Grande, Brazil
Variations in the total area covered by four small corrie glaciers eastern slopes of Keller Peninsula, Admiralty Bay, King George Island (KGI) are investigated using a topographical survey, carried out austral summers 1992/93 and 1993/94.For this aerial photographs, satellite images mapping surveys (from 1950s onwards) were compared.All have lost between 44 to 83% their areas from 1979 2000.At least two already some stagnant parts may disappear if present climatic warming trend region persists.
The availability of accurate meteorological data is important for the modeling atmospheric flows, enabling understanding climate change in a given environment over time. Therefore, this study aimed to evaluate quality 2 m temperature (T) and mean sea level pressure (MSLP), obtained through reanalysis models ERA5 ERA-Interim (ERA-i) northern region Antarctic Peninsula, covering period from 1979 2018. To carry out statistical process, local observations nine weather stations installed were...
In the Brazilian Pampa, vegetation disturbance and soil degradation led to an expansion of sediment remobilization areas, a process locally termed as sandization. Transported sands generate severe environmental problems hamper growth vegetation. However, parts these sandization areas are quickly covered by biological crusts (biocrusts), which have not been investigated in this biome before. This study describes biocrust occurence Pampa for first time analyses their distribution patterns...
This is a short note about the use of Antarctic maps, charts and geographic names in scientific publications.
En este trabajo de investigación, se analizó el comportamiento los glaciares Andes Tropicales en un clima cambiante; para esto emplearon imágenes satelitales multiespectrales diversas fuentes conjunto con datos meteorológicos. El estudio enfocó representativos cuatro zonas climáticas diferentes, a saber: trópicos interiores, exteriores húmedos del norte, sur y secos. Se calcularon cambios la línea nieve máxima anual período 1985―2015, también decenales área entre 1975 2015. Además, tasa...
The Keller Peninsula (KP), on the King George Island, shelters Brazilian Comandante Ferraz Station (EACF) and it has been site from several international research projects.However, this area not yet mapped in detail, except for around EACF, which is at 1:500.Aiming to overcome lack of a detailed accurate map entire KP, work proposes use photogrammetric GIS techniques compilation new topographic scale 1:5,000.The elaboration was based interior exterior orientation aerial photographs,...
The climate change phenomena have been influencing terrestrial and glacial ecosystems around the planet. Maritime Antarctica is especially sensitive to these variations over last 50 years increasing global air temperatures caused extensive retreat. objective of this study evaluate potential use SAR technology in monitoring surface dynamics Potter Peninsula, King George Island, maritime Antarctica. An image generated by satellite COSMO-SkyMed, obtained on 2 February 2011, was used extract...
This study discusses the formation and variations of supraglacial lakes on Baltoro glacier system in central Karakoram Himalaya during last four decades. We mapped Glacier from 1978 to 2014 using Landsat MSS, TM, ETM + LCDM images. Most glacial were formed or expanded late 1970s–2008. After 2008, total number area found be lesser compared previous years. tried find any teleconnections exists between lake changes this region pacific decadal oscillation (PDO), which entered its prolonged warm...
This paper investigates morphological features of the ice cap and glaciers King George Island (KGI), South Shetlands, Antarctica, mainly to determine variations in glacier front positions from 1956 2000, using maps produced aerial photogrammetric surveys satellite imagery.Glacier were determined three multispectral SPOT images taken 1988SPOT , 1995SPOT 2000.These compared their 1956, photographs.A new digital topographic database, as a basic Geographic Information System (GIS)-layer for...