Abstract
An analysis of the minimum air temperature behavior was carried out for the southern tip of South America and the western side of the Antarctica Peninsula. Punta Arenas shows an overall annual warming of 0.15°C per decade during the 1960-2010 period, although this occurred mainly in the summer and winter seasons. The trend of the air temperature in the western side of the Antarctic Peninsula shows an increase until around 2000, but the warming rate during the last 2001-2010 decade has been less than previous decades; in particular, meteorological stations in King George Island show slight cooling. The lineal annual warming per decade as shown by Bellingshausen, Verndsky/Faraday and Rothera stations are 0.26°C ± 0.75°C, 0.55°C ± 1.26°C and 0.69°C ± 1.31°C; for the respectively, 1969-2010, 1951-2010 and 1978-2010 periods. These rates of warming are slightly lower than those found for the same stations but for the 1969-2000, 1951-2000 and 1978-2000 periods.
Highlights
During the last decades global warming has becoming an increasing issue around the world
The air temperature analysis shows an overall warming of 0.73 ̊C during 1960-2010 period, in the southern tip of
The analysis indicates that warming observed in Punta Arenas in the last 5 decades is mostly associated with the shift of the atmospheric-ocean system over the North Pacific Ocean, in other words, by the Pacific Decadal Oscillation (PDO) [22], called the Pacific Decadal Variability (PDV) [21]
Summary
During the last decades global warming has becoming an increasing issue around the world. The physical science basis behind the observed and predicted changes, as well as, the implication of the climate change has been a permanent preoccupation since the eighties. Change) with the aim of stabilizing the greenhouse gas concentrations in the atmosphere to prevent dangerous and irreversible anthropogenic changes in the climate system. The continental air temperature has increased by 0.84 ̊C - 1.12 ̊C over the period 1901-2010, with the rate of warming increasing during the last 2 - 3 decades [4], or 0.13 ̊C ± 0.13 ̊C per decade according with Hansen et al [5]. The West Antarctica region which includes the Antarctic Peninsula (AP, hereafter) and the thropogenic greenhouse increased. An analysis of the mid-tropospheric air (above the inversion layer) the whole Antarctica shows an increase in temperature [13]
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