scholarly journals BREEDING DISTRIBUTION OF BIRD SPECIES IN HANNAH POINT - LIVINGSTON ISLAND, ARCHIPELAGO OF SOUTH SHETLANDS, ANTARCTICA

2016 ◽  
pp. 38-41
Author(s):  
Maria Virginia Petry ◽  
Gabriela Bandasz Werle ◽  
Gustavo Aver
Keyword(s):  
Bird Species ◽  
Livingston Island ◽  
Breeding Distribution ◽  
South Shetlands

Records of white-rumped sandpiper (Calidris fuscicollis) on the South Shetland Islands

Polar Record ◽  
2010 ◽  
Vol 47 (3) ◽  
pp. 262-267 ◽  
Author(s):  
Malgorzata Korczak-Abshire ◽  
Piotr J. Angiel ◽  
Grzegorz Wierzbicki
Keyword(s):  
Annual Variation ◽  
Bird Species ◽  
South Shetland Islands ◽  
Breeding Bird ◽  
Austral Spring ◽  
Climate Conditions ◽  
Shetland Islands ◽  
Weather And Climate ◽  
Term Variation ◽  
South Shetlands

ABSTRACTA programme to monitor non-breeding bird species in the vicinity of Arctowski Station, King George Island, South Shetlands, Antarctica, has been conducted over the past 30 years. The white-rumped sandpiper Calidris fuscicollis (Vieillot 1819) seems to occur now as a vagrant in South Shetlands area more frequently than previously. This trend, and the annual variation in numbers that have been observed could be a result of short term and longer term variation in weather and climate conditions during the austral spring and summer months when this species is observed. A higher air temperature, which is a result of predominant northern winds bringing relatively warm and moist air, would probably result in more open habitats and better food resources that would allow the birds to persist or survive.

Fluxes and composition of settling particles during summer in an Antarctic shallow bay of Livingston Island, South Shetlands

Polar Biology ◽  
2001 ◽  
Vol 24 (9) ◽  
pp. 670-676 ◽  
Author(s):  
Enrique Isla ◽  
Albert Palanques ◽  
Victor Alvà ◽  
Puig P. ◽  
Guillén J.
Keyword(s):  
Settling Particles ◽  
Livingston Island ◽  
South Shetlands ◽  
Shallow Bay

scholarly journals Evaluation of the ground surface Enthalpy balance from bedrock shallow borehole temperatures (Livingston Island, Maritime Antarctic)

2008 ◽  
Vol 2 (2) ◽  
pp. 153-184
Author(s):  
M. Ramos ◽  
G. Vieira
Keyword(s):  
Methodological Approach ◽  
Ground Surface ◽  
Enthalpy Change ◽  
Ground Temperatures ◽  
Livingston Island ◽  
Hourly Temperature ◽  
South Shetlands ◽  
Borehole Temperatures ◽  
Gains And Losses ◽  
Modelling Approach

Abstract. The annual evolution of the ground temperatures from Incinerador borehole in Livingston Island (South Shetlands, Antarctic) is studied. The borehole is 2.4 m deep and is located in a quartzite outcrop in the proximity of the Spanish Antarctic Station Juan Carlos I. In order to model the movement of the 0°C isotherm (velocity and maximum depth) hourly temperature profiles from: (i) the cooling periods of the frost seasons of 2000 to 2005, and (ii) the warming periods of the thaw seasons of 2002–2003, 2003–2004 and 2004–2005, were studied. In this modelling approach, heat gains and losses across ground surface are considered to be the causes for the 0°C isotherm movement. A methodological approach to calculate the Enthalpy change based on the thermodynamic analysis of the ground during the cooling and warming periods is proposed. The Enthalpy change is equivalent to the heat exchange through the ground surface during each season, thus enabling to describe the interaction ground-atmosphere and providing valuable data for studies on permafrost and periglacial processes. The bedrock density is considered to be constant in the borehole and initial isothermal conditions at 0°C are assumed to run the model. The final stages correspond to the temperatures at the end of the cooling and warming periods (annual minima and maxima).

scholarly journals Transition from a Subaerial to a Subnival Permafrost Temperature Regime Following Increased Snow Cover (Livingston Island, Maritime Antarctic)

Atmosphere ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1332
Author(s):  
Miguel Ramos ◽  
Gonçalo Vieira ◽  
Miguel Angel de Pablo ◽  
Antonio Molina ◽  
Juan Javier Jimenez
Keyword(s):  
Active Layer ◽  
Thermal Regime ◽  
Soil Surface ◽  
Snow Accumulation ◽  
Active Layer Thickness ◽  
Subglacial Environment ◽  
Livingston Island ◽  
South Shetlands ◽  
Loss Of Mass ◽  
The Antarctic

The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In this paper, we studied the effects of increased snow accumulation in the permafrost thermal regime in two boreholes (PG1 and PG2) in Livingston Island, South Shetlands Archipelago, from 2009 to 2015. The two boreholes located c. 300 m apart but at similar elevation showed different snow accumulation, with PG2 becoming completely covered with snow all year long, while the other remained mostly snow free during the summer. The analysis of the thermal regimes and of the estimated soil surface energy exchange during the study period showed the effects of snow insulation in reducing the active layer thickness. These effects were especially relevant in PG2, which transitioned from a subaerial to a subnival regime. There, permafrost aggraded from below, with the active layer completely disappearing and the efficiency of thermal insulation by the snowpack prevailing in the thermal regime. This situation may be used as an analogue for the transition from a periglacial to a subglacial environment in longer periods of cooling in the paleoenvironmental record.

Sign in / Sign up

Export Citation Format

Share Document