scholarly journals Microbial biogeography during austral summer 2007 in the surface waters around the South Shetland Islands, Antarctica

2013 ◽  
Vol 70 (2) ◽  
pp. 131-140 ◽  
Author(s):  
LM Olsen ◽  
MV Ardelan ◽  
CD Hewes ◽  
O Holm-Hansen ◽  
C Reiss ◽  
...  
Keyword(s):  
Surface Waters ◽  
Austral Summer ◽  
South Shetland Islands ◽  
The South ◽  
Shetland Islands ◽  
Microbial Biogeography

Distribution of salps near the South Shetland Islands during austral summer, 1990?1991 with special reference to krill distribution

Polar Biology ◽  
1995 ◽  
Vol 15 (1) ◽  
Author(s):  
Jun Nishikawa ◽  
Mikio Naganobu ◽  
Taro Ichii ◽  
Haruto Ishii ◽  
Makoto Terazaki ◽  
...  
Keyword(s):  
Special Reference ◽  
Austral Summer ◽  
South Shetland Islands ◽  
The South ◽  
Shetland Islands

H2O2 accumulation from photochemical production and atmospheric wet deposition in Antarctic coastal and off-shore waters of Potter Cove, King George Island, South Shetland Islands

1999 ◽  
Vol 11 (2) ◽  
pp. 131-139 ◽  
Author(s):  
Doris Abele ◽  
Gustavo A. Ferreyra ◽  
Irene Schloss
Keyword(s):  
Hydrogen Peroxide ◽  
Surface Waters ◽  
Wet Deposition ◽  
High Energy ◽  
South Shetland Islands ◽  
King George Island ◽  
The South ◽  
Potter Cove ◽  
Shetland Islands ◽  
Snowfall Event

Temporal and spatial variations of the hydrogen peroxide accumulation were measured in off-shore waters and in intertidal rockpools near Jubany Station, King George Island, South Shetland Islands. As H2O2 photoformation is mainly driven by the short wavelength radiation in the UV-B and the UV-A range of the solar spectrum, the study was conducted between the beginning of October and the end of December 1995, the period of Antarctic spring ozone depletion. Wet deposition of H2O2 containing snow was identified as a major source of hydrogen peroxide in the surface waters of Potter Cove. As the concentrations of dissolved organic carbon (DOC) in Potter Cove surface waters were low (121 ± 59 μmol Cl−1), when compared to the highly eutrophicated waters on the German Wadden coast (6000–7000 μmol Cl−1), direct UV-induced DOC photo-oxidation was of only limited significance in the Antarctic sampling site. Nonetheless, under experimental conditions, H2O2 photoformation in Potter Cove surface waters amounted to 90 ± 40 nmol H2O2 h−1 l−1 under a UV-transparent quartz plate. When high energy UV-B photons were cut-off by a WG320 filter formation continued at a rate of 66 ± 29 nmol H2O2 h−1 l−1 due to UV-A and visible light photons. Samples from freshly deposited snow contained between 10 000 and 13 600 nmol H2O2 l−1, and a snowfall event in mid November resulted in a maximum concentration of 1450 nmol H2O2 l−1 in the upper 10 cm layer of Potter Cove surface waters. Maximal H2O2 concentrations in intertidal rockpools were even higher and reached up to 2000 nmol H2O2 l−1 after the snowfall event. During a grid survey on December 17 1995, H2O2 concentrations and salinity displayed a north to south gradient, with higher concentrations and PSU at the south coast of the cove. The reasons for this spatial inhomogenety are as yet unknown, but may relate to a minor local input of photo-reactive organic matter from creeks entering the cove in the south-east, as well as to waste water discharge from the station, located on the south beach.

scholarly journals Using Fixed-Wing UAV for Detecting and Mapping the Distribution and Abundance of Penguins on the South Shetlands Islands, Antarctica

Drones ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 39 ◽  
Author(s):  
Pfeifer ◽  
Barbosa ◽  
Mustafa ◽  
Peter ◽  
Brenning ◽  
...  
Keyword(s):  
Austral Summer ◽  
Time Lapse ◽  
Chinstrap Penguin ◽  
South Shetland Islands ◽  
Total Abundance ◽  
The South ◽  
Shetland Islands ◽  
Remote Areas ◽  
Exact Position ◽  
South Shetlands

Antarctic marine ecosystems undergo enormous changes, presumably due to climate change and fishery. Unmanned aerial vehicles (UAVs) have an unprecedented potential for measuring these changes by mapping indicator species such as penguins even in remote areas. We used a battery-powered fixed-wing UAV to survey colonies along a 30-km stretch of the remote coast of southwest King George Island and northwest Nelson Island (South Shetland Islands, Antarctica) during the austral summer 2016/17. With multiple flights, we covered a total distance of 317 km. We determined the exact position of 14 chinstrap penguin colonies, including two small unknown colonies, with a total abundance of 35,604 adults. To model the number of occupied nests based on the number of adults counted in the UAV imagery we used data derived from terrestrial time-lapse imagery. The comparison with previous studies revealed a decline in the total abundance of occupied nests. However, we also found four chinstrap penguin colonies that have grown since the 1980s against the general trend on the South Shetland Islands. The results proved the suitability of the use of small and lightweight fixed-wing UAVs with electric engines for mapping penguin colonies in remote areas in the Antarctic.

Polish Antarctic activities, 1978–79

Polar Record ◽  
1980 ◽  
Vol 20 (125) ◽  
pp. 156-158 ◽  
Author(s):  
K. Birkenmajer
Keyword(s):  
Austral Summer ◽  
East Antarctica ◽  
Polish Academy ◽  
South Shetland Islands ◽  
King George Island ◽  
The South ◽  
Shetland Islands ◽  
Academy Of Sciences

The Polish Academy of Sciences supported two scientific expeditions to Antarctica during the austral summer, 1978–79: an expedition to H. Arctowski station on King George Island in the South Shetland Islands, and an expedition to A. B. Dobrowolski station at Bunger Oazis on Knox Coast, East Antarctica.

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