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Refractory Black Carbon Results and a Method Comparison between Solid-state Cutting and Continuous Melting Sampling of a West Antarctic Snow and Firn Core

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Advances in Atmospheric Sciences 2020年第5期37卷 545-554页

作者： Luciano MARQUETTO Susan KASPARI jefferson cardia simOes Emil BABIK Department of Geological Sciences Central Washington UniversityEllensburgWashington 98926USA Polar and Climatic Center Federal University of Rio Grande do SulPorto AlegreRio Grande do Sul91509-900Brazil

This work presents the refractory black carbon(rBC)results of a snow and firn core drilled in West Antarctica(79°55'34.6"S,94°21'13.3"W)during the 2014?15 austral summer,collected by Brazilian researchers as part of the First Brazilian West Antarctic Ice Sheet *** core was drilled to a depth of 20 m,and we present the results of the first 8 m by comparing two subsampling methods—solid-state cutting and continuous melting—both with discrete *** core was analyzed at the Department of Geological Sciences,Central Washington University(CWU),WA,USA,using a single particle soot photometer(SP2)coupled to a CETAC Marin-5 *** continuous melting system was recently assembled at CWU and these are its first *** also present experimental results regarding SP2 reproducibility,indicating that sample concentration has a greater influence than the analysis time on the reproducibility for low rBC concentrations,like those found in the Antarctic *** was carried out using mainly the rBC variation and sulfur,sodium and strontium as secondary parameters,giving the core 17 years(1998?2014).The data show a well-defined seasonality of rBC concentrations for these first meters,with geometric mean summer/fall concentrations of 0.016μg L^?1 and geometric mean winter/spring concentrations of 0.063μg L^?*** annual rBC concentration geometric mean was 0.029μg L^?1(the lowest of all rBC cores in Antarctica referenced in this work),while the annual rBC flux was 6.1μg m^?2 yr^?1(the lowest flux in West Antarctica records so far).

关键词： black carbon West Antarctica ice core single particle soot photometer

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A GIS FOR THE ANTARCTIC SPECIALLY MANAGED AREA OF ADMIRALTY BAY,KING GEORGE ISLAND,ANTARCTICA

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Geo-Spatial Information Science 2001年第2期4卷 8-14页

作者： jefferson cardia simóes F.A.Ferron Matthias Braun J.Arigony Neto F.E.Aquino Laboratório de Pesquisas Antrticase Glaciológicas

A GIS is proposed as a tool for the managing plan for the Antarctic specially managed area (ASMA) in Admiralty *** ASMA comprises the area considered to be within the glacial drainage basin of the ***,it includes part of SSSI No.8 adjacent to the area but outside of the glacial drainage *** stations and six refuges are located in the *** a SPOT satellite image map,the limits of the ASMA are marked and its area is re_*** consists of 362 km 2,including 186 km 2 island ice field and small cirque glaciers and 32 km 2 ice_free *** rest comprises water of the bay and a small adjacent area (8 km 2) of the Bransfield *** ASMA_GIS will consists of 12 data layers ranging from the physiographic settings to the biological and administrative *** data will be implemented into Arc/Info GIS according to the cartographic guidelines of the SCAR WG_***,five plans of information will be realised using a topographic database compiled from various sources and data from the revised bathymetric chart published by the Brazilian Navy Hydrographic Survey and also including: 1) Limits of the ASMA and protected areas;2) Glaciological features (*** basin limits) and 3) Human presence (*** and historical sites).These basic GIS layers will be operational in early ***,additional data on the remaining layers (***,geology and geomorphology) will be included from published sources. The ASMA_GIS will form an important database for environmental monitoring and studies surveying temporal changes of features such as glacier front positions or bird breading sites.

关键词： Admiralty Bay managing plan environmental monitoring ASMA

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Tropical-Antarctic connections of an explosive cyclone in southern Brazil:rainfall stable isotope ratios and atmospheric analysis

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Advances in Polar Science 2020年第2期31卷 103-111页

作者： Pedro Amaral REIS Francisco Eliseu AQUINO Venisse SCHOSSLER Ronaldo Torma BERNARDO jefferson cardia simOes Centro Polar e Climático Instituto de GeociênciasUniversidade Federal do Rio Grande do Sul91501-970Porto AlegreRio Grande do SulBrazil Climatic Change Institute University of MaineOronoMEUSA

This study analyzes the stable isotopic ratio(δ18 O)and the synoptic characteristics of a precipitation event that occurred in the southernmost state of Brazil,Rio Grande do Sul,a region sensitive to explosive cyclogenesis in years with enhanced tropic-pole *** main objective was to evaluate the influence of tropical and Antarctic climate systems on the *** ring-down spectroscopy was used for the water isotopic analysis,and NCEP CFSv2 data were employed for the synoptic analysis of rainfall over a 48-h *** Amazonian isotopic signature on precipitated water was identified.A strong,low-level meridional flow from the Amazon Basin,combined with the development of a frontal system,resulted in intense cyclogenesis that generated an explosive cyclone.

关键词： Antarctica Amazon South American low-level jet(SALLJ) cyclogenesis

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The 2015/16 El Nino-related glacier changes in the tropical Andes

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Frontiers of Earth Science 2019年第2期13卷 422-429页

作者： Bijeesh Kozhikkodan VEETTIL jefferson cardia simOes Department for Management of Science and Technology Development Ton Due Thang UniversityHo Chi Minh CityVietnam Faculty of Environment and Labour Safety Ton Due Thang UniversityHo Chi Minh CityVietnam Centro Polar e Climatico Universidade Federal do Rio Grande do Sul (UFRGS)CEP91501-970 Porto AlegreBrazil

Significant changes in the area and snowline altitude of two glacierized mountains - Nevado Champara (Cordillera Blanca,Peru) and Cerro Tilata (Cordillera Real,Bolivia)- in the tropical Andes,before and after the recent El Nino in 2015/16 period,have been analysed using Sentinel 2A and Landsat *** is seen that the recent El Nino has been accompanied by higher fluctuation in glacier coverage on Nevado Champara and the loss of glacier coverage on Cerro Tilata was very high during the past 16 *** in snowline altitude of selected glaciers was very high after the 2015/16 El *** in the area covered by snow and ice during the La Nina periods were not enough to cover the ice loss occurred during the previous El Nino events and the strongest El Nino in 2015/ 16 was followed by a significant loss of ice-covered areas in the tropical *** resources in this region will be affected in the near future if the current trends in glacier decline *** strategies needs to be implemented to reduce the impacts of the continuing loss of glacierized on regional communities in the tropical Andean region.

关键词： ENSO tropical Andes glacier loss snowline altitude Sentinel 2A

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THE COMPILATION OF A DTM AND A NEW SATELLITE IMAGE MAP FOR KING GEORGE ISLAND,ANTARCTICA

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Geo-Spatial Information Science 2001年第2期4卷 47-51页

作者： Matthias Braun jefferson cardia sim"非汉字符号"es N.Blindow Steffen Vogt U.F.Bremer M.Pfender H.Saurer F.E.Aquino F.A.Ferron Institut für Physische Geographie

An improved topographic database for King George Island,one of the most frequently visited regions in Antarctica,is presented.A first step consisted in combining data from differential GPS surveys gained during the austral summers 1997～1998 and 1999～2000,with the current coastline from a SPOT satellite image mosaic,topographic information from existing maps and from the Antarctic Digital *** this data sets,a digital terrain model (DTM) was generated using Arc/Info *** a second step,a satellite image map at the scale 1∶100 000 was assembled from contour lines derived from the DTM and the satellite mosaic.A lack of accurate topographic information in the eastern part of the island was *** topographic surveying or SAR interferometry should be used to improve the data quality in that *** GIS integrated database will be indispensable for glaciological and climatological studies and administrative and scientific *** future,the application of GIS techniques will be mandatory for environmental impact studies and environmental monitoring as well as for management plans on King George Island.

关键词： King George Island Antarctic Peninsula GIS digital terrain model satellite image map glacier retreat environmental management

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A GIS-BASED GLACIER INVENTORY FOR THE ANTARCTIC PENINSULA AND THE SOUTH SHETLAND ISLANDS——A FIRST CASE STUDY ON KING GEORGE ISLAND

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Geo-Spatial Information Science 2001年第2期4卷 15-24页

作者： Matthias Braun F.Rau jefferson cardia Si"非汉字字符"mes Institut für Physische Geographie

The aim of the international project “Global Land Ice Measurements from Space (GLIMS)" headed by the US Geological Survey is to establish a world wide glacier inventory based on satellite *** data set will form a first digital baseline study for future glacier *** presented GIS_based glacier inventory for King George Island is a case study for the area of the Antarctic *** the database of the glacier inventory topographic information,specific glaciological parameters as well as metadata will be *** topographic data consists of drainage basin limits,basin areas,altitudinal ranges,perimeters and mean *** data sets should comprise information on glacier retreat in different periods,glacier velocities,ice thickness and bedrock topography as well as derived *** and measured mass balance parameters could be included as additional data *** particular,these metadata records must comprise background information on data accuracy and data sources and should be compatible with a future data model for the King George Island GIS (KGIS).Three examples illustrate that the GLIMS database will not only contain information valuable for glaciological applications,but also other environmental studies on the island will benefit from this standardised remote sensing data ***,a very close link between the data models of KGIS and GLIMS has to be established to enable these ***,better access to historic aerial photography would enable a continuous record of glacier retreat from the beginning of the 1950’s onward.

关键词： King George Island South Shetland Islands geographic information system glacier inventory glacier retreat glacier parameters

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