6/3/2023 0 Comments Glims airialphotos![]() ![]() To place these results into a broader geographical context, the mass balance of a further 15 glaciers from around the Monte San Lorenzo massif was determined from 2000 onwards. Over the periods of 2000–20–2018, the mass budget of these three glaciers remained virtually unchanged at −1.37 ± 0.06 and −1.36 ± 0.17 m w.e. a –1 and a maximum loss of −2.23 ± 0.07 m w.e. The period 1981–2000 had the most negative mass budget, with an area-averaged mass loss of 1.67 ± 0.11 m w.e. Our results indicate that net mass balance was negative throughout the six decades, with a mean mass loss of −1.35 ± 0.08 m w.e. Here, we present geodetic mass and area changes of three valley glaciers from Monte San Lorenzo derived from stereo aerial photos, the Shuttle Radar Topography Mission (SRTM) and satellite imagery (SPOT5 and Pleiades) spanning four periods from 1958 to 2018. 5Departamento de Geografía, Universidad de Chile, Santiago, ChileĪ full understanding of glacier changes in the Patagonian Andes over decadal to century time-scales is presently limited by a lack of detailed and appropriate long-term observations.4Centro de Estudios Científicos, Valdivia, Chile.3School of Geography and Sustainable Development, University of St Andrews, St Andrews, United Kingdom.2Departamento de Geografía, Facultad de Filosofía y Letras, Universidad Nacional de Cuyo, Mendoza, Argentina.1Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, CCT-Mendoza CONICET, Mendoza, Argentina.“GLIMS-IT: contributo italiano al progetto GLIMS di monitoraggio satellitare dei ghiacciai del globo” Atti 17a Conferenza Nazionale ASITA – Riva del Garda 5-7 novembre 2013, pp.Daniel Falaschi 1,2*, María Gabriela Lenzano 1, Ricardo Villalba 1, Tobias Bolch 3, Andrés Rivera 4,5 and Andrés Lo Vecchio 1,2 Ranzi R., Baroni C., Pepe M., Rossi E., Vantadori F., Salvatore M.C. A detailed analysis of the image of the Adamello-Presanella group, where a 36% glacier’s retreat was observed, is presented On average, in the areas investigated so far, a decrease from the 80s to 2007, in the extent of glaciers between 34% and 50% was detected, with a marked fragmentation of different glaciological units and the disappearance of some small glaciers, confirming the acceleration in the last decades of the glacier’s retreat started at the end of the Little Ice Age. The information for the mountain ranges of the Cevedale and Adamello-Presanella have been organized into a geographic information system in KML format. The results of processing have been transmitted to the data base maintained by the National Snow and Ice Data Center and the Italian Glaciological Committee, which is involved in the initiative for updating the Italian Glaciers Inventory. Once the extent of the glacier is obtained, the geomorphological parameters are extracted automatically with a computer code that implements the requirements of the project GLIMS. From a methodological point of view the information from the thermal infrared spectral channels for the recognition of some debris-covered glaciers was used. From the analysis of five images scanned by the ASTER sensor installed on the TERRA satellite, the limits of glaciers in the mountain ranges of the Lepontine Alps, Pusteresi Alps, the Veneto Dolomites, the Cevedale group in the Noce basin, and Adamello-Presanella were extracted. The Italian contribution to the project GLIMS-Global Land Ice Measurements from Space consists in producing a satellite-derived Atlas of Italian glaciers. GLIMS-IT: italian contribution to the GLIMS Project – satellite-surveying of the globe glaciers. ![]()
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