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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Universidad Nacional Autónoma de México
2014
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=56531042003 |
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- Incidence and trend of blocking action situations on the temperature and precipitation in Argentina ADELIA P. ALESSANDRO Biología Indices temperature precipitation circulation change In southern South America and for the period 1960-2011, frequencies and trends of seasonal blocking situ - ations (Bs) determined at 100, 70 and 40º W (B100, B70 and B40), respectively are estimated. The effect of such situations on temperature and precipitation is also analyzed. The distribution of occurrences of B100, B70 and B40 peaks in spring and has minimum values in summer; trends are positive in summer and fall and negative in winter and spring. To the north of approximately 38º S, B70 determines negative temperature anomalies ( D T) over the entire country during the four seasons and B40 in spring and summer. Except for summer, rainfall is greater than normal when Bs occur at both longitudes. To the south of approximately 38º S, B100 give place to negative D T. The frequencies and amounts of precipitation are greater in spring. This area is limited to the northernmost northern (southernmost southern) area in fall (summer). According to the signs of the trends of the Bs and to the associated values of temperature and precipitation, the way in which they may have contributed to the change in both variables during 1960-2011 is inferred. 2014 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56531042003 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.2 Vol.27