THE PROSPECT IN IMPACT OF GLOBAL WARMING ON CHANGES OF DEGREE-DAY FOR REQUIREMENT OF WHEAT, FOR CLUSTERS OF DIFFERENT CLIMATES IN IRAN

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ROSHAN GH.R.; OWJI R.; NAJAFI M.S.; SHAHKOOYE E.

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Journal: Journal of Regional Planning Year:2012 | Volume:1 | Issue:4 Page(s): 93-108

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Title

THE PROSPECT IN IMPACT OF GLOBAL WARMING ON CHANGES OF DEGREE-DAY FOR REQUIREMENT OF WHEAT, FOR CLUSTERS OF DIFFERENT CLIMATES IN IRAN

Author(s)

ROSHAN GH.R. | OWJI R. | NAJAFI M.S. | SHAHKOOYE E. | Issue Writer Certificate

Keywords

EMISSION SCENARIOSQ1

DURING GRAIN GROWTHQ2

SIMULATIONQ2

CLUSTERINGQ2

IRANQ2

Abstract

The impact of climate on the agriculture depending on variety of temporal and local scale of assessment is different. In general scale, evolution of agricultural ecosystems and their varieties are affected by climate, whereas on lesser scale, growing of vegetations in inner seasonal and inter seasonal are controlled with climate. So, we can conclude whatever likely change happens on climate in the future, it will cause severe changes in different levels on agricultural productions, and it can change the present arable regimes that have been evolution in prevalent climatic condition. Therefore, this study will evaluate and analyze the effects of global warming on the degree- day component for different climatic regions of the country. In this study, using data from 92 synoptic stations and climatology, and 12 climatic parameters, IRAN cluster into 4 climatic. The changes of two components of temperature and degree-day for the two time scale: past (1960-2009) and future (2025, 2050, 2075, 2100) are measured and evaluated. So for this study to simulate the temperature changes, in the future decades, INMCM-30 model are used which is one of the GCM models. The scenario used in this study is P50 which is its average emissions scenario is SRES. In this study, we use the MAGICC SCENGEN software to run the GCM models. Results of this study show that the great effectiveness of minimum temperature, in comparison to other components of the temperature, is related to increase of CO2 on atmosphere in the IRAN. So that in every decade from 1960 until the late 2000s, the rate of increase in average minimum temperature 0.22oCg is calculated for the whole of IRAN. Furthermore the simulated temperature data shows that, the increase of air temperature rate in comparison to mean long term 1960-1990, will be 4.25oCg until 2100 year. Consequently the temperature rise is along with increasing degree-day that the data values in the comparison between observations and simulated data indicate an increased degree - in most areas of the country, especially the first and second clusters.The outputs can be concluded that the warming due to air and degree-day component in the autumn month and even in other seasons, instead to start of autumn wheat cultivation period in the early or middle of autumn, that's observing in most of IRAN, and concerning to this, can somewhat advanced this period and starting in the late of summer. Because in temporal aspect, warm season become extending and cold season will begin with the time delay. Planting can put advance the implementation of the flowering period with high temperatures and the stress of high temperatures and reduce product loss. But do not forget that this is an issue that requires the same ratio to the amount and number of rainy days of the late summer will be added. It should be noted that the seeds need the minimum rainfall that can sprout and take steps to start growing. In this regard, the comparison between the output values of the degree - days between observation and simulated data respectively show that, the autumnal wheat growing season in the first clusters, afterward second clusters, four and a third to be put advance. But for this proposed application, we task are the correct understanding of the summer and fall precipitation changes.

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APA: Copy

ROSHAN, GH.R., OWJI, R., NAJAFI, M.S., & SHAHKOOYE, E.. (2012). THE PROSPECT IN IMPACT OF GLOBAL WARMING ON CHANGES OF DEGREE-DAY FOR REQUIREMENT OF WHEAT, FOR CLUSTERS OF DIFFERENT CLIMATES IN IRAN. JOURNAL OF REGIONAL PLANNING, 1(4), 93-108. SID. https://sid.ir/paper/230426/en

Vancouver: Copy

ROSHAN GH.R., OWJI R., NAJAFI M.S., SHAHKOOYE E.. THE PROSPECT IN IMPACT OF GLOBAL WARMING ON CHANGES OF DEGREE-DAY FOR REQUIREMENT OF WHEAT, FOR CLUSTERS OF DIFFERENT CLIMATES IN IRAN. JOURNAL OF REGIONAL PLANNING[Internet]. 2012;1(4):93-108. Available from: https://sid.ir/paper/230426/en

IEEE: Copy

GH.R. ROSHAN, R. OWJI, M.S. NAJAFI, and E. SHAHKOOYE, “THE PROSPECT IN IMPACT OF GLOBAL WARMING ON CHANGES OF DEGREE-DAY FOR REQUIREMENT OF WHEAT, FOR CLUSTERS OF DIFFERENT CLIMATES IN IRAN,” JOURNAL OF REGIONAL PLANNING, vol. 1, no. 4, pp. 93–108, 2012, [Online]. Available: https://sid.ir/paper/230426/en

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