Assessment of heat stress and cloudiness probabilities in post ‑ flowering of spring wheat and canola in the Southern Cone of South America
Episodes of heat stress constrain crop production and will be aggravated in the near future according to short and mediumterm climate scenarios. Global increase in cloudiness has also been observed, decreasing the incident solar radiation. This work was aimed to quantify the probability of occurrenc...
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| Formato: | Artículo |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2021rivelli.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Assessment of heat stress and cloudiness probabilities in post ‑ flowering of spring wheat and canola in the Southern Cone of South America |
| 520 | |a Episodes of heat stress constrain crop production and will be aggravated in the near future according to short and mediumterm climate scenarios. Global increase in cloudiness has also been observed, decreasing the incident solar radiation. This work was aimed to quantify the probability of occurrence of heat stress and cloudiness, alone or combined, during the typical post-flowering period of wheat and canola in the Southern Cone of South America. Extended climate series (last 3–5 decades with daily register) of 33 conventional weather stations from Argentina, Brazil, Chile and Uruguay (23 to 40°S) were analysed considering the period from September to December. Two different daily events of heat stress were determined: (i) maximum daily temperature above 30 °C (T major to 30 °C) and (ii) 5 °C above the historical average maximum temperature of that day (T + 5 °C). A cloudiness event was defined in our work as incident solar radiation 50% lower than the historical average radiation of that day (R50%). The T major to 30 °C event increased its probability of occurrence throughout the post-flowering phase, from September to December. By contrast, the risk of T + 5 °C event decreased slightly, just like for R50%, and the higher the latitude, the lower the probability of R50%. The T major to 30 °C plus R50% combined stresses reached greater cumulated probabilities during post-flowering, compared to T + 5 °C plus R50%, being 42% vs 15% in northernmost locations, 26% vs.19% in central (between 31 and 35°S) and 28% vs. 1% in southernmost locations, respectively. A curvilinear relationship emerged between the monthly probability of combined stresses and the number of days with stress per month. In summary, T major to 30 °C was the most frequent thermal stress during post-flowering in wheat and canola. Both combined stresses had a noticeable risk of occurrence, but T major to 30 °C plus R50% was the highest. Evidence of the recent past and current occurrence of heat stress individually, and its combination with cloudiness events during post-flowering of temperate crops, serves as a baseline for future climate scenarios in main cropped areas in the Southern Cone of South America. | ||
| 653 | |a HEAT STRESS | ||
| 653 | |a CLOUDINESS | ||
| 653 | |a POST‑FLOWERING | ||
| 653 | |a WHEAT | ||
| 653 | |a CANOLA | ||
| 653 | |a SOUTH AMERICA | ||
| 700 | 1 | |a Rivelli, Gonzalo Martín |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. |9 38058 | |
| 700 | 1 | |9 27281 |a Fernández Long, María Elena |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. | |
| 700 | 1 | |a Abeledo, Leonor Gabriela |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. |u CONICET. Buenos Aires, Argentina. |9 11135 | |
| 700 | 1 | |a Calderini, Daniel Fernando |u Universidad Austral de Chile. Instituto de Producción y Sanidad Vegetal. Valdivia, Chile. |9 7947 | |
| 700 | 1 | |a Miralles, Daniel Julio |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. |u CONICET. Buenos Aires, Argentina. |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |9 6438 | |
| 700 | 1 | |a Rondanini, Déborah Paola |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. |u CONICET. Buenos Aires, Argentina. |9 11330 | |
| 773 | |t Theoretical and Applied Climatology |g Vol.145, no.3-4 (2021), p.1485–1502, tbls., grafs. mapas | ||
| 856 | |x ARTI202210 |f 2021rivelli |i En reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2021rivelli.pdf | ||
| 856 | |u http://www.springer.com/ |z LINK AL EDITOR | ||
| 942 | |c ARTICULO |n 1 | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||