The use of participatory cartography in teaching areas subject to flooding and flood in Santa Maria, RS, Brazil Franciele Delevati Ben, Carina Petsch Revista De Geografia Norte Grande, 2026 The development of participatory maps favours bringing geography teaching closer to students' realities, enabling them to analyse geographical space from a critical perspective.The aim of this article is to demonstrate the potential of Participatory 3D Mapping (P3DM) for teaching Geography in basic education, helping with the understanding and teaching of themes such as flooding and flood, which are part of the students' experience.Methodologically, the research is an adaptation of P3DM, aimed at teaching Geography.The project lasted approximately two months and was divided into six stages, including choosing the target audience, theoretical debate, making the model, inserting and validating the data.The research showed valid results, with the students taking part in the whole process of building the three-dimensional model that was used for mapping,
Ice Phenology of Lakes in the Byers, Keller, and Fildes Peninsulas, Maritime Antarctica, from 2014 to 2023 using SAR Data Jorge Antônio Viel, Kátia Kellem da Rosa, Carina Petsch, Luiz Felipe Velho, Danielle Dall Amaria Soffiatti, Federico Aita, Rosemary Vieira Revista Brasileira De Geomorfologia, 2025 This study examined the ice phenology of twenty-five lakes located in the Fildes and Keller peninsulas (King George Island) and the Byers Peninsula Livingston Island), Antarctica, using SAR (Sentinel-1) data from 2014 to 2023. A backscatter threshold was established for ice-free and frozen surfaces in S1 images. The temporal analysis of lake phenology was conducted covering the months from October to March. The slope context, altitude, and distance from the coast of the lakes were characterized. Field activities were carried out to validation. Temporal backscatter analysis revealed seasonal patterns of lake surface freezing and thawing, which were correlated with climatic variables, including mean air temperature, precipitation, and wind. Mean air temperature emerged as the primary driver of ice cover variability, with fewer frozen days observed in years of increased positive temperatures, particularly during El Niño events. The years 2015 and 2019 exhibited less thawing, while 2023 recorded the lowest extent of frozen lake surfaces (99.15%). Local factors, including wind speed and direction, and coast distance and altitude, also influenced the observed patterns. Sentinel-1 imagery proved effective for mapping and monitoring lake surface ice cover in glacial and periglacial environments, underscoring its potential for assessing lacustrine responses to climate variability.
Geomorphological mapping and palaeoglacial reconstruction of the Admiralty Bay, King George Island, Maritime Antarctica Cleiva Perondi, Kátia K. Rosa, Jefferson C. Simões, Rosemary Vieira, Arthur Ayres Neto, Fabio Magrani, Carina Petsch, Luiz F. Velho Antarctic Science, 2025 Submarine landforms in polar fjords provide essential insights into glacier responses to climate change in the Maritime Antarctic. This work aims to reconstruct the groundline of a palaeo-ice stream throughout the Holocene in Admiralty Bay, King George Island. The landforms were investigated using multi-resolution topobathymetric data based on seismic and multibeam surveys. The inner sector features shallow moraine banks and elongated glacial lineations, in contrast to the deeper moraine banks observed in the middle and outer regions of the fjord. Elongated glacial lineations indicate a north-east to south-west ice flow and a wet-based thermal regime. At ~9000 years bp, the grounding line was at the Admiralty Bay fjord’s mouth. In the middle of the fjord, a prominent morainal bank reveals the palaeoglacier’s grounding line. The grounding line significantly changed position after this stillstand in response to climatic variability (Mid-Holocene, at 4500–2800 years bp) and was conditioned by the deep bathymetry. The continued retreat of the ice in the Holocene possibly led to a division of the palaeo-ice stream into outlets or tidewater glaciers. MB7 and MB9 indicate the position of the grounding line during a major stillstand at the end of the inlets. The bedrock topography and fjord geometry influenced the deglaciation pattern of Dobrowolski Glacier in Martel Inlet, and the moraine banks recorded two final major stillstands. The retreat rates in Martel Inlet have increased due to the loss of anchoring points and rising temperatures after the Neoglacial period. The morainal banks present in the proximal environments at Martel Inlet are smaller, discontinuous and spaced, indicating the retreat behaviour in the last 7 decades.
Glacial geomorphological characterization and glacigenic sedimentation in Admiralty Bay, Maritime Antarctica Cleiva Perondi, Katia Kellem Rosa, Rosemary Vieira, Carina Petsch, Luiz Felipe Velho, Nicholas Becker Pires Pi, Sandra Bromberg, Jefferson Cardia Simões Revista Brasileira De Geomorfologia, 2025 The study of the relationship between geomorphology and sedimentation processes is important as it clarifies information about relict landscapes. These processes are understood based on glacial landforms and the characteristics of their sediments. The objective of this article is to investigate glacial geomorphology and associate it with the attributes of glaciogenic sediments in the proglacial areas of the Baranowski, Windy, and Dobrowolski glaciers in Admiralty Bay, King George Island, and to infer changes in these glacial environments. Sediment samples were collected from depositional features during fieldworks (2019 and 2023), which underwent granulometric and morphoscopic analyses. The visual identification of glacial landforms followed criteria of morphology, morphometric characteristics, depositional environment, sedimentology and genesis. The sediments were interpreted as glaciogenic and related to moraine deposits. The geomorphological mapping identified glacial landforms that provide information on aspects such as the direction of glacial flow, area, and thermo-basal regime. The subaerial environment was observed to be related to the submarine environment through glaciers, mass movements and the sediment supply via meltwater. Thus, there is continuity in the processes related to the glacier: the closer to it, the more dynamic the environment, while as the distance increases, the terrain tends to present reworked or smoothed landforms.
Monitoring Boeckella lake, Antarctica Peninsula, from 1986 to 2023, using remote sensing Carina Petsch, Adrián Angel Silva Busso, Katia Kellem da Rosa, Rosemary Vieira Cuadernos Geograficos, 2025 The Antarctic Peninsula (AP) has experienced rapid warming in recent years, which has caused permafrost degradation. In the north of AP, in Hope Bay, Boeckella Lake has experienced rapid and sudden drainage events in recent decades driven by thermokarst processes. This research aims to quantify the intra- and interannual lake area variability of Boeckella Lake, AP, using Remote Sensing products from 1986-2023. Landsat, Quickbird, and Sentinel 2 images were used between 1986 and 2023, applying the NDWI to identify the water body. The lake evolution is divided into three time periods according to abrupt changes in area. The first period (1986-2003) marks the first loss of the lake volume on January 4, 2001. The second period (2003-2010) shows other successive losses in volume in 2005, 2007 and 2008. In 2010 the dam broke, and the dike was no longer rebuilt. In the last period (2010-2023) there is multi lacustrine system, with smaller and transient wetlands. Its minimum area in this period was 28578 m² in 2020, a loss of 30% of the area compared to 1988. The area of Boeckella Lake has changed over the years and the Landsat, QuickBird, and Sentinel 2 images combined with the NDWI technique have been able to demonstrate variation.
Susceptibility to Glacial Lake Outburst Flood in the Chajolpaya subbasin, northern Cordillera Real, Bolivia Séfora Bertoldi, Kátia Kellem da Rosa, Rafael da Rocha Ribeiro, Carina Petsch Revista De Geociencias do Nordeste, 2025 Grande parte das geleiras em todo o planeta vem sofrendo retração nas últimas décadas como resposta às mudanças climáticas globais. A perda de área das geleiras em todas as regiões do mundo, ao longo dos séculos XX e XXI, resultou em aumento de lagos glaciais. O objetivo deste estudo foi investigar a suscetibilidade de inundação associada aos lagos glaciais alimentados por geleiras tropicais, localizadas em uma área de estudo piloto da sub-bacia Chajolpaya, no norte da Cordilheira Real, Bolívia, utilizando a metodologia AHP - Análise Hierárquica Ponderada, com auxílio de ferramentas de sensoriamento remoto e geoprocessamento. Foram utilizadas imagens de satélite, referentes aos anos de 1999, 2011, 2015 e 2022, a partir das quais foram selecionados 16 lagos glaciais na área de estudo, mediante critérios estabelecidos, para serem analisados e monitorados. Os resultados encontrados indicaram que dois lagos possuem muito alta suscetibilidade à inundação (GLOF - Glacial Lake Outburst Flood), quatro lagos possuem alta suscetibilidade a GLOF, seis lagos possuem média suscetibilidade, nenhum lago possui baixa suscetibilidade e quatro possuem muito baixa suscetibilidade a GLOF. Tais resultados indicam a existência de riscos criosféricos associados aos lagos de muito alto e alto risco, e que podem impactar as comunidades a jusante.
Dynamics of land use and land cover in Jari (RS) and soybean expansion scenarios between 2025-2030 Eric Moisés Beilfuss, Carina Petsch, Romario Trentin Ra E GA O Espaco Geografico Em Analise, 2024 In recent decades, the Pampa Biome has rapidly transitioned from grasslands to soybean crops. This article aims to simulate soybean expansion in Jari (RS), Brazil, between 2025 and 2030. Methodologically, the software Dinamica EGO was used. The dynamic data entered refers to the land use and land cover from the MapBiomas 8.1 project for the years 2000 and 2022. The static data refers to altitude, slope, landforms and soils. The results showed 33% increase in the area under soybean cultivation between 2000 and 2022, with a significant reduction in the significant reduction in grassland areas. The probability of transition from grassland to soybean crops is higher close to areas with a mosaic of uses, and smaller near forested areas. The Dinamica EGO showed an overall accuracy of 65.6%, comparing the real map with the simulated map for the year 2022. It should be noted that the software had greater difficulty in estimating small soybean crops, which were planted on land less suitable for cultivation, such as steeper slopes. In this way, the projections indicate a continued increase in the area of soybean cultivation by 2030, covering 51% of the municipality's area, mainly due to the replacement of natural grassland areas. Therefore, it is crucial to continue monitoring the expansion of soybean in the Pampa Biome.
Changes and collapse in lacustrine system in Antarctic Peninsula ice-free area: Boeckella and Buenos Aires lakes ROSEMARY VIEIRA, PRISCILA CARDOSO, KÁTIA K. DA ROSA, CARINA PETSCH, JUAN MANUEL LIRIO Anais Da Academia Brasileira De Ciencias, 2024 Some Antarctic ice-free areas have been affected by changes in lacustrine zones and permafrost thawing due to rising air temperatures over the last 60 years Temperature time-series were analyzed to understand the processes leading to the changes of Boeckella and Buenos Aires lakes, north Antarctic Peninsula. Statistical calculations were applied to average, maximum, and minimum temperatures, as well as to indexes such as Positive Degrees Day, Freezing/Thaw Day, and days with temperatures ≥ 0 °C and ≥ 10 °C. Changes in the region over recent decades were observed in mean and maximum temperatures and an increase in minimum temperature since the mid-1990s. In addition, the Normalized Difference Water Index was extracted from Landsat images from 2003, 2016, 2020, and 2021. These images were used to calculate changes in the areas of Boeckella and Buenos Aires lakes. These data revealed an 87% decrease in the area (m²) of Boeckella Lake and a 60% increase in Buenos Aires Lake´s area (m²). Concern has been raised about the modifying lake areas in the Antarctic Peninsula, where the collapse of Boeckella Lake could be the first case recorded in ice-free areas of Antarctica continent.
Retreat of Greenwich, Livingston, Robert and Snow Islands glaciers, Antarctica, between 1956 and 2023 DANIELLE D. SOFFIATTI, KÁTIA K. ROSA, JÚLIA L. LORENZ, FILIPE LINDAU, CARINA PETSCH, FRANCISCO E. AQUINO, JEFFERSON C. SIMÕES Anais Da Academia Brasileira De Ciencias, 2024 Glaciers are sensitive to environmental climatic conditions and show their variability over time. This study investigates the environmental characteristics and variation in glacial cover of the Greenwich, Livingston, Robert and Snow islands, Antarctica, between 1956 and 2023. The glacier extension mapping was based on visual interpretation of the Landsat 4, 7 and 8 optical images and normalised difference indexes combination. The REMA 8 digital elevation model was applied to the islands' geomorphometric analysis. Results were compared to climatic series and environmental characteristics. The glacial coverage decreased by 16.9% from 1956 to 2023, equivalent to 209.95 ± 0.113 km². Snow Island, with shallow bathymetry near glacial margins and land-terminating ice-fronts, exhibited the smallest retreat rate values. The glacial coverage of Livingston Island decreased significantly (18%, equivalent to 153.2 ± 0.113 km²) from 1956-2021, representing the highest values in the study. The changes in glacial coverage of the Robert and Greenwich islands were more substantial in the 1989-2023 period than in 1956-1989. Sectors with marine-terminating glaciers, associated with high bathymetric amplitudes, exhibited more significant variations compared to other sectors, contributing to the evolution of fjord-type bays. Glacial coverage has been lost in recent decades due to regional atmospheric and oceanic warming.
Use of collaborative cartography for mapping the living spaces for students at a public university Jhennifer Tais Vieira Habowski, Carina Petsch, Natália Lampert Batista Atelie Geografico, 2023 Atualmente, grande parte da população tem acesso a aplicativos de localização, consequentemente, qualquer indivíduo pode se tornar um produtor de Informação Geográfica Voluntária (VGI). Diante disso, o objetivo deste trabalho é realizar o mapeamento colaborativo dos espaços de vivência de estudantes de Geografia da Universidade Federal de Santa Maria, para compreender as relações sociais, econômicas e de lazer que eles vivenciam em Santa Maria (RS) e região. O projeto foi desenvolvido no aplicativo Canvise os pontos foram inseridos no QGIS 3.4. Pode-se dividir os estudantes em dois grupos: um dos que vivem com suas famílias, residem em bairros periféricos e utilizam comércios como grandes redes de hipermercados; e outro dos que utilizam os serviços imobiliários, pois viviam em municípios do interior, passando a residir nos bairros Centro e Camobi, com acesso a comércios de médio a pequeno porte. Os dados VGI demonstraram a importância da Universidade como fator de desenvolvimento local e regional. Palavras-chave: VGI. Cartografia Social. Universidade. Territórios.
RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME Cleiva Perondi, Kátia Kellem da Rosa, Carina Petsch, Filipe Daros Idalino, Manoela Araújo Gonçalves de Oliveira, Júlia Lopes Lorenz, Rosemary Vieira, Jefferson Cardia Simões Revista De Geociencias do Nordeste, 2020
