Artículo
Abstract:
The climate observations at Orcadas represent the only southern high-latitude site where data span more than a century, and its daily measurements are presented for the first time in this paper. Although limited to a single station, the observed warming trends are among the largest found anywhere on the earth, facilitating the study of changes in extreme temperatures as well as averages. Factors that may influence Antarctic climate include natural variability; changes in greenhouse gases; and, since about the mid-1970s, the development of the ozone hole. The seasonality of observed warming and its temporal evolution during the century are both key for interpretations of Antarctic climate change. No statistically significant climate trends are observed at Orcadas from 1903 to 1950. However, statistically significant warming is evident at Orcadas throughout all four seasons of the year since 1950. Particularly in austral fall and winter, the warming of the cold extremes (coldest 5% and 10% of days) substantially exceeds the warming of the mean or of the warmest days, providing a key indicator for cold season Antarctic climate change studies. Trends in the summer season means and extremes since 1970 are approximately twice as large as those observed earlier, supporting suggestions of additional regional warming in that season because of the effects of ozone depletion on the circulation. Further, in the spring and summer seasons, significant mean warming also occurred prior to the development of the Antarctic ozone hole (i.e., 1950-70), supporting an important role for processes other than ozone depletion, such as greenhouse gas increases, for the climate changes. © 2010 American Meteorological Society.
Registro:
| Documento: | Artículo |
| Título: | Changes in climate at high southern latitudes: A unique daily record at Orcadas spanning 1903-2008 |
| Autor: | Zazulie, N.; Rusticucci, M.; Solomon, S. |
| Filiación: | Departamento de Ciencias de la Atmósfera y los Océanos, FCEN, Universidad de Buenos Aires, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina National Oceanic and Atmospheric Admin./Earth System Research Laboratory/Chemical Sciences Division, Boulder, Colorado, United States |
| Palabras clave: | Antarctic climate; Antarctic ozone hole; Climate observations; Climate trends; Cold season; Extreme temperatures; Key indicator; Natural variability; Ozone depletion; Ozone hole; Regional warming; Seasonality; Southern latitudes; Summer season; Temporal evolution; Global warming; Greenhouse gases; Ozone layer; Ozone |
| Año: | 2010 |
| Volumen: | 23 |
| Número: | 1 |
| Página de inicio: | 189 |
| Página de fin: | 196 |
| DOI: | http://dx.doi.org/10.1175/2009JCLI3074.1 |
| Título revista: | Journal of Climate |
| Título revista abreviado: | J. Clim. |
| ISSN: | 08948755 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08948755_v23_n1_p189_Zazulie |
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Citas:
---------- APA ----------
Zazulie, N., Rusticucci, M. & Solomon, S. (2010) . Changes in climate at high southern latitudes: A unique daily record at Orcadas spanning 1903-2008. Journal of Climate, 23(1), 189-196.http://dx.doi.org/10.1175/2009JCLI3074.1
---------- CHICAGO ----------
Zazulie, N., Rusticucci, M., Solomon, S. "Changes in climate at high southern latitudes: A unique daily record at Orcadas spanning 1903-2008" . Journal of Climate 23, no. 1 (2010) : 189-196.http://dx.doi.org/10.1175/2009JCLI3074.1
---------- MLA ----------
Zazulie, N., Rusticucci, M., Solomon, S. "Changes in climate at high southern latitudes: A unique daily record at Orcadas spanning 1903-2008" . Journal of Climate, vol. 23, no. 1, 2010, pp. 189-196.http://dx.doi.org/10.1175/2009JCLI3074.1
---------- VANCOUVER ----------
Zazulie, N., Rusticucci, M., Solomon, S. Changes in climate at high southern latitudes: A unique daily record at Orcadas spanning 1903-2008. J. Clim. 2010;23(1):189-196.http://dx.doi.org/10.1175/2009JCLI3074.1
