Applied Research in Geographical Sciences

Applied Research in Geographical Sciences

Statistical and synoptic analysis of warm cloud temperatures and its effect on wheat yield in Kermanshah area

Authors
Meteorological Department
Abstract
Considering the undeniable impact of agricultural plants on climatic and regional changes, it seems necessary to conduct regional research to understand the reaction of each agricultural plant in different stages of growth in relation to weather elements. If the temperature of the air along with the warm cloud is lower or higher than a certain threshold, its development will stop. Between the two limits, there is an optimal temperature where the plant grows the fastest. Temperature and clouds are both the most important climatic elements in agriculture. Both climatic parameters together cause stress in wheat and lower the productivity of the product. Considering the strategic nature of wheat, in order to increase the level of production, in the present research, while taking advantage of the experiences and methods and models used in foreign and domestic researches, it was practical in Kermanshah province due to the extent of the land under wheat cultivation and The significant amount of production, which has a special place in this field at the level of the country, the determination of the statistical threshold and the synoptic analysis of warem cloud temperatures on the performance of the wheat crop are investigated. According to the investigations and consultations with agricultural engineers, the maximum temperature along with cloudy days causes the phenomenon of greenhouse and excessive heat, which causes the fall of flowers, rot, sterility of pollen grains, fruit reduction, Premature aging and poverty become seeds, and this phenomenon occurs mostly in the months of May and June.
Keywords

• Adler, R.F. and A.J. Negri. (1988). A satellite infrared technique to estimate tropical convective and stratiform rainfall. J. Appl. Meteor., 27, 30–51.
• Arkin, P.A. and B.N. Meisner. (1987). The relationship between large- scale convective rainfall and cold cloud over the Western Hemisphere during 1982–1984. Mon. Wea. Rev., 115: 51–74.
• Asseng, S. et al. (2015). Rising temperatures reduce global wheat production. Nature Climate Change , 5:143–147.
• Fischer, R. and R. Maurer. (1978). Drought resistance in spring wheat cultivars. I. Grown yield responses. Aust. J. Agric. Res. 29: 897-912.
• Feldman ,M. (2001) , Origin of Cultived What, In Bonjean AP and Angus WJ Fild Crops Res,103:25-35.
• Jesse Tack , Andrew Barkley, Lawton Lanier Nalley (2015). Effect of warming temperatures on US wheat yields . Proc Natl Acad Sci USA.6936 – 6931: (22) 112.
• Gritchefield,J.H.(1983).’’General climatology’’prentice Hall Inc.U.S.A
• Houze, R. A. (1993). Cloud Dynamics. Academic Press, 573 pp.
• Lobell, D. B., Sibley, A., and Ortiz- Monasterio , J. (2012). Extreme heat effects on wheat senescence in India. Nature Climate Change , 2:186–189.
• Matthew Gammans, Pierre Mérel , Ariel Ortiz Bobea . (2016). The impact of climate change on cereal yields: Statistical evidence from France. Association's (2016). AAEA Annual Meeting, Boston, MA, July 31-August 2, 2016.
• Midmore, D.J., Cartwright, P.M. & Fischer, R.A. (1984). Wheat in tropical environments. II. Crop growth and grain yield. Field Crops Res., 8: 207-227.
• Moore, F. C. and Lobell, D. B. (2014). Adaptation potential of European agriculture in response to climate change. Nature Climate Change , 4(7):610–614.
• http:www.esrl.noaa.gov/gmd/grad/solcalc/sunrise.html.
• Rathove, P. S (2005) Techniques and Management of field crop production. Agro bios, Indian.
• Tack, J., Barkley, A., and Nalley, L. (2015). Effect of warming temperatures on US wheat yields. PNAS, 112(22):6931–6936.
• Zhang, Y (1994) Numerical experiments for the impacts of temperature and precipitation on the growth and development of winter wheat, Journal of Environment science, 5:194-200.
• Zeng, X. (1999). The Relationship among Precipitation,Cloud-Top Temperature and Perceptible Water over the Tropics. J. Climate. 12: 2503-2514.