In January 2009, Radio Echo Sounding (RES) measures were made during the campaign in the northern part of the Antarctic Peninsula, at the surroundings of the Chilean Base Bernardo O’Higgins (63° 19’ S; 57° 53’ W). The system has three main components: Transmitter, Receiver and a Data Acquisition ...
En enero de 2009, durante una campaña al sector norte de la Península Antártica específicamente
en los alrededores de la Base Chilena Bernardo O´Higgins, ubicada en el islote Isabel Riquelme de la
rada Covadonga en el cabo Legoupi (63° 19’ S; 57° 53’ W), se realizaron mediciones de espesor del
hi...
Record-low ozone column densities (with a minimum
of 212 DU) persisted over three weeks at the Río
Gallegos NDACC (Network for the Detection of Atmospheric
Composition Change) station (51.5 S, 69.3 W) in
November 2009. Total ozone remained two standard deviations
below the climatological mea...
The individual elemental composition of insoluble airborne particulates found in King George Island (KGI), Antarctic
Peninsula (atmosphere, snow, firn and ice deposits) and in the atmosphere of Chilean Patagonia by SEM-EDS analysis
identify probable sources and transport mechanisms for the atmosp...
Durante las últimas décadas, drásticas contracciones en la estructura de los hielos marinos y en las poblaciones de la especie clave, krill Antártico (Euphausia superba), han ocurrido junto con severas variaciones climáticas en la región boreal de la península Antártica. Se ha estimado que las po...
In a recent decades drastic contractions in sea ice structure and in populations of key species, Antarctic krill (Euphausia superba), have occurred along with severe changes in the boreal region of the Antarctic Peninsula. It has been estimated that populations of Pygoscelid penguins (genus Pygos...
Given the potential significance of enzyme activities as a link between internal metabolic pathways and environmental nutrients, we investigated the relationships of nitrate reductase (NR) and alkaline phosphatase (AP) with primary production and inorganic nutrients in South Shetland Islands, Ant...
Dada la potencial importancia de la actividad enzimática de ensambles fitoplanctónicos, como indicador de
su metabolismo interno dominante respecto de los nutrientes, este estudio investigó las relaciones entre la
nitrato reductasa (NR) y la fosfatasa alcalina (FA) con la producción primaria y nu...
La parte más austral del cono sur de Sudamérica, que algunas veces se encuentra bajo la influencia del agujero de ozono antártico (AOA), ocasionalmente recibe altos niveles de radiación ultravioleta B (UV-B: 280-320nm). La Universidad de Magallanes en Punta Arenas, Chile (Lat. 53° S; Long. 70.9° ...
The most austral zone of the Southern Cone of South America, wich is sometimes under the influence of the Antarctic Ozone Hole (AOH), occasionally receives enhanced levels of ultraviolet B radiation (UV-B: 280-320 nm). Ultraviolet erythemal irradiance measurements began in 1999 by the University ...
Background: Antarctic marine organisms have evolved a variety of physiological, life-history and molecular
adaptations that allow them to cope with the extreme conditions in one of the coldest and most temperaturestable
marine environments on Earth. The increase in temperature of the Southern Oce...
Antarctica is recognized as being geopolitically and scientifically important, and as one of the regions with the greatest potential to affect and be affected by global climate change. Still, little is known in practice about how climate change will be handled within the main governance framework...
This paper presents an analysis of satellite and groundbased
measurements of total O3 columns and the UV index
of a unique event during the 2009 Antarctic O3 hole season.
From 11 to 30 November 2009 the Antarctic vortex was
located just south of the southern tip of South America
rather than at it...
A fossil invertebrate fauna from the South-West end of Livingston Island, South Shetland Islands, is described. The fauna, found in marine beds interbedded in a plant-bearing continental sequence, consists of Spiticeras (Spiticeras) spitiensis, Blanfordiceras (Pseudoblanfordia) patagoniense, Favr...
Se describe la fauna de invertebrados fósiles, encontrados en el extremo suroeste de Isla Livingston. La fauna está contenida en sedimentos marinos intercalados con estratos continentales con restos de plantas fósiles. Las especies determinadas son: Spiticeras (Spiticeras) spitiensis, Blanfordice...
