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| Titel |
Frost damage in citric and olive production as the result of climate degradation |
| VerfasserIn |
Antonio Saa Requejo, M. C. Díaz Alvarez, A. M. Tarquis, F. Burgaz Moreno, R. García Moreno |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021423
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| Zusammenfassung |
| Low temperature is one of the chief limiting factors in plant distribution. Freezing
temperature shortens the growing season and may lower the yield and quality of any number
of fruit crops. Minimum temperatures records for the Spanish region of Murcia were studied
as limiting factor in fruit production. An analysis of temperature series since 1935 showed
that the range of the absolute minimum temperatures (Tmin) on frost days in the target year,
namely -0.5 ºC to -4.0ºC, was statistically similar to the range recorded in 1993, while the
mean minimum temperatures (tmin) were found to have risen. The historical series also
showed the mean minimum temperatures (tmin) to have increased, however. Through 1985,
tmin ranged from 4.0 to -2.0 ºC, depending on the area, while these limits shifted
in more recent years to 7.0 - 0.5 ºC. This increase in mean temperature produced
that the frost episodes in March 2004 was considered by lemon, mandarin and
olive producers as the worst in many years for frost damage since the minimum
temperature was reached in a more sensitive phenological stage, despite the statistical
evidence that similar freezing temperatures had been reached on similar dates in other
years. |
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