Zobrazeno 1 - 10
of 40
pro vyhledávání: '"JEFFERSON C. SIMÕES"'
Autor:
FILIPE D. IDALINO, KÁTIA K. DA ROSA, FERNANDO L. HILLEBRAND, JORGE ARIGONY-NETO, CLAUDIO WILSON MENDES JR, JEFFERSON C. SIMÕES
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 96, Iss suppl 2 (2024)
Abstract This work investigated the annual variations in dry snow (DSRZ) and wet snow radar zones (WSRZ) in the north of the Antarctic Peninsula between 2015-2023. A specific code for snow zone detection on Sentinel-1 images was created on Google Ear
Externí odkaz:
https://doaj.org/article/3f3081fc310c4ee6b5c7c47144bbbf49
Autor:
Heather M. Clifford, Mariusz Potocki, Charles Rodda, Daniel Dixon, Sean Birkel, Michael Handley, Elena Korotkikh, Douglas Introne, Franciele Schwanck, Flavia A. Tavares, Ronaldo T. Bernardo, Filipe G. L. Lindau, Oscar Vilca Gomez, Harrison Jara-Infantes, Victor Bustínza Urviola, L. Baker Perry, Jonathan Maurer, Anton Seimon, Margit Schwikowski, Gino Casassa, Shugui Hou, Andrei V. Kurbatov, Kimberley R. Miner, Jefferson C. Simões, Paul A. Mayewski
Publikováno v:
Journal of Glaciology, Vol 69, Pp 693-707 (2023)
Shallow firn cores, in addition to a near-basal ice core, were recovered in 2018 from the Quelccaya ice cap (5470 m a.s.l) in the Cordillera Vilcanota, Peru, and in 2017 from the Nevado Illimani glacier (6350 m a.s.l) in the Cordillera Real, Bolivia.
Externí odkaz:
https://doaj.org/article/13a615f4cac4472aa5496c671e105092
Autor:
ANDRÉ M. DE ANDRADE, ROBERTO F.M. MICHEL, ULISSES FRANZ BREMER, ELIAS DE LIMA NETO, GONÇALO BRITO T.G. VIEIRA, CARLOS ERNESTO G.R. SCHAEFER, JEFFERSON C. SIMÕES
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract This work aimed to characterize the variation in the thermal regime of the active layer in a permafrost area on Fildes Peninsula, Antarctica, and relate this variability with meteorological data between 2014 and 2016. The monitoring site was
Externí odkaz:
https://doaj.org/article/aa726cc95ed94fb4800916267d173471
Autor:
CLAUDIO W. MENDES JÚNIOR, JORGE ARIGONY NETO, FERNANDO L. HILLEBRAND, MARCOS W.D. DE FREITAS, JULIANA COSTI, JEFFERSON C. SIMÕES
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract Several studies have utilized passive microwave imagery for monitoring snowmelt in Antarctica. However, due to the low spatial resolution of these images (25 km), the quantification of snowmelt is not precise. To enhance the accuracy of thes
Externí odkaz:
https://doaj.org/article/a33ff90b90434a9ea16e1138068ad1bf
Autor:
KÁTIA K. DA ROSA, CLEIVA PERONDI, JÚLIA L. LORENZ, JEFFREY D. AUGER, PAMELA CAZAROTO, CARINA PETSCH, RAFAEL G. SIQUEIRA, JEFFERSON C. SIMÕES, ROSEMARY VIEIRA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract This study aims to investigate the glacier shrinkage and recent proglacial environment in King George Bay, Antarctica, since 1988 in response to climate change. Remote sensing data (SPOT, Sentinel, Landsat and Planet Scope images) were appli
Externí odkaz:
https://doaj.org/article/c8626de9cf3443158477b3c59f948181
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract A 22.48 m long ice core (BR-IC-4) was collected in the West Antarctic Ice Sheet (at 83°58’59.4” S, 80°07’01.4” W, 1,295 m above the sea level) during the Austral summer of 2004–2005, as a contribution to the International Trans-A
Externí odkaz:
https://doaj.org/article/e5871c23d6b243199f7c84838e8df983
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract We used Sentinel-2 imagery time series to generate a vegetation map for the Northern part of the Antarctica Peninsula and offshore islands, including the South Shetlands. The vegetation cover was identified in the NDVI maximum value composit
Externí odkaz:
https://doaj.org/article/241ec99156b444aa90068d79d098a74e
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract This work consists of the sedimentological, mineralogical, and geochemical characterization of eight marine sediment cores collected in the Central Bransfield Basin, along a transect between the South Shetland Islands to the Antarctic Penins
Externí odkaz:
https://doaj.org/article/81cad699b0174409a485d89a1c993d1c
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Externí odkaz:
https://doaj.org/article/8cc6428155374133ac9b57869fd47d78
Autor:
JOÃO G. ILHA, JEFFERSON C. SIMÕES, MANOELA B.P. PORTELLA, RONALDO T. BERNARDO, ISAÍAS U. THOEN, GINO CASASSA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Abstract This article compares isotopic, ionic and climatic data from two firn cores from the West Antarctic Ice Sheet (WAIS). The IC-02 (88°01’21.3”S , 82°04’21.7”W) and the IC-05 (82°30’30.8”S , 79°28’02.7”W) closer to the coast
Externí odkaz:
https://doaj.org/article/e8706a2d469841009832688d63170eae