Paper Information

Journal:   PAJOUHESH-VA-SAZANDEGI   SUMMER 2007 , Volume 20 , Number 2 (75 IN AGRONOMY AND HORTICULTURE); Page(s) 78 To 85.
 
Paper: 

ANALYSIS OF FIRST FALL AND LAST SPRING ADVECTION AND RADIATION - ADVECTION FROSTS IN AZERBAIJAN PROVINCES

 
 
Author(s):  NOUHI K.*, PEDRAM M., SAHRAEIAN F., KAMALI GH.A.
 
* ATMOSPHERIC SCIENCE AND METEOROLOGICAL RESEARCH CENTER (ASMERC)
 
Abstract: 

Dates of first fall and last spring frosts on the basis of minimum shelter temperature equal or less than 0oC were determined for 12 synoptic stations for period 1986-2000 in Azerbaijan region. The advection frost was determined based on using of synoptic maps and studying of meteorological elements in different hours. In this work, we found that series of first fall and last spring advection and radiation-advection frosts are random and normally distributed. This study shows that on the average advection frosts start from 6 to 40 days later than radiation-advection frosts in fall and ends 2 to 25 days earlier in spring. Potential growing season that is interval between last spring and first fall advection frost is found to be from 5 to 65 days longer than the growing season defined by the interval from last spring to first fall occurrences of minimum temperature equal or less than 0oC. Crop protection against radiation frosts can bring about too much benefit. To assess whether practical protection of some special crops against radiation frosts is done or not, the number of radiation frosts before first advection frost in fall and after last advection frost in spring, were determined.

 
Keyword(s): ADVECTION FROST, RADIATION FROST, LENGTH OF GROWING SEASON, WEST AZABAIGAN, EAST AZARBAIGAN
 
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