Changes in agricultural climate indices based on climate change scenarios in Lorestan province

Document Type : Original Article

Authors

1 Ph. D. student Climatology of Geography and Geomorphology, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

2 Associate Professor. Of Geography and Geomorphology, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

3 Associate Professor of Earth Science, Shahid Beheshti University, Tehran, Iran Associate Professor of Geography, The Islamic Azad University, Ahvaz, Iran

4 Ph.D. climatology, Remote sensing and GIS Reserarch center, Shahid Beheshti University, Tehran, Iran

Abstract

The occurrence of any possible change in the future climate will seriously change agricultural production at various levels and will be able to significantly change the crop systems that have evolved under the current climatic conditions. The aim of this study is to investigate the changes in key indicators of agricultural climate based on temperature in the context of climate change. This achieve the aim, the spatio-temporal variations in extreme temperature indices in the current conditions (1986–2016) and under scenarios of RCP4.5 and RCP8.5 (2020–2070) was analyzed based on observed data and climate models in Lorestan province. The agro-climate indices related to temperature are consists of Daily Temperature Range, Frost Days, Days with temperatures below -20 °C, Length of Growing Season and Growing Degree Days. The results indicate that the Daily Temperature Range is approximately -0.4 °C decreasing and 0.3–0.9 °C increasing in the current situation and in the RCP8.5, respectively. Indices of Frost Days and Days with temperatures below -20 °C will decrease by about 20 days in the future compared to the current condition. Compared with the current situation, Length of Growing Season and Growing Degree Days will increase by an average of 60 days a year and by about 300 degrees in the future, respectively. In general, in the future, the warm and cold periods of the year will increase and decrease, respectively. This leads to an increase in evapotranspiration and a decrease in soil moisture and a reason to reduce water storage and ultimately reduce crop yield.

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Anandhi, A., Perumal, S., Gowda, P. H., Knapp, M., Hutchinson, S., Harrington, J., Rice, C. W. 2013. Long-term spatial and temporal trends in frost indices in Kansas, USA. Climatic Change, 120(1-2), 169-181.
Arnell, N. W., Lowe, J. A., Challinor, A. J., Osborn, T. J. 2019. Global and regional impacts of climate change at different levels of global temperature increase. Climatic Change, 155(3), 377-391.
Arnell, N. W., Lowe, J. A., Lloyd-Hughes, B., Osborn, T. J. 2018. The impacts avoided with a 1.5 C climate target, a global and reginal assessment. Climatic change, 147(1-2), 61-76.
Babaeian, I., Kouhi, M. 2012. Agroclimatic Indices Assessment over Some Selected Weather Stations of Khorasan Razavi Province Under Climate Change Scenarios. Water and Soil, 26(4), 953-967. (In Farsi)
Barros, V. R. 2014. Impacts, Adaptation and Vulnerability, Part B, Regional Aspects; Working Group II Contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press.
Chamchati, H., Bahir., M. 2011. Contributions of climate change on water resources in semi-arid areas; example of the Essaouira Basin (Morocco). Geographia Technica, 1(1), 1-8.
Donat, M. G., Alexander, L. V. 2012. The shifting probability distribution of global daytime and night‐time temperatures. Geophysical Research Letters, 39(14).‏ doi:10.1029/2012GL052459
Donat, M. G., Lowry, A. L., Alexander, L. V., O’Gorman, P. A., Maher, N. 2016. More extreme precipitation in the world’s dry and wet regions. Nature Climate Change, 6(5), 508-513.
Fernández‐Long, M. E., Müller, G. V., Beltrán‐Przekurat, A., Scarpati, O. E. 2013. Long‐term and recent changes in temperature‐based agroclimatic indices in Argentina. International Journal of Climatology, 33(7), 1673-1686.
Fernández‐Long, M. E., Müller, G. V., Beltrán‐Przekurat, A., Scarpati, O. E. 2013. Long‐term and recent changes in temperature‐based agroclimatic indices in Argentina. International Journal of Climatology, 33(7), 1673-1686.
Furió، D., Meneu, V. 2011. Analysis of extreme temperatures for four sites across Peninsular Spain. Theoretical and applied climatology, 104(1-2), 83-99.
Ha, K. J., Yun, K. S. 2012. Climate change effects on tropical night days in Seoul, Korea. Theoretical and applied climatology, 109(1-2), 191-203.
Hatfield, J. L., Prueger, J. H. 2015. Temperature extremes, Effect on plant growth and development. Weather and climate extremes, 10, 4-10.
Ilunga, L., Tsinda, A. 2004. Physical factors of runoff in Kigali (Rwanda). Geo Eco Trop, 28(1-2), 53-60.
Kharin, V. V., Zwiers, F. W., Zhang, X., Wehner, M., 2013. Changes in temperature and precipitation extremes in the CMIP5 ensemble. Climatic change, 119(2), 345-357.
Lijun, F. A. N., Zhe, X. I. O. N. G. 2015. Using Quantile Regression to Detect Relationships between Large-scale Predictors and Local Precipitation over Northern China. Advances in Atmospheric Sciences, 32,541-552.
Liu, J., Fritz, S., Van Wesenbeeck, C. F. A., Fuchs, M., You, L., Obersteiner, M., Yang, H. 2008. A spatially explicit assessment of current and future hotspots of hunger in Sub-Saharan Africa in the context of global change. Global and Planetary Change, 64(3-4), 222-235.‏
McFadden, J. R., Miranowski, J. A. 2015. Climate change, technology, and US corn yields. Working paper. Department of Economics, Iowa State University US.
Muhire, I., Ahmed, F. 2016. Spatiotemporal trends in mean temperatures and aridity index over Rwanda. Theoretical and applied climatology, 123(1-2), 399-414.‏
Naumann, G., Alfieri, L., Wyser, K., Mentaschi, L., Betts, R. A., Carrao, H., Feyen, L. 2018. Global changes in drought conditions under different levels of warming. Geophysical Research Letters, 45(7), 3285-3296.‏
Ostberg, S., Schewe, J., Childers, K., Frieler, K. 2018. Changes in crop yields and their variability at different levels of global warming. Earth System Dynamics, 9(2), 479-496.‏
Piticar, A. 2019. Changes in agro-climatic indices related to temperature in Central Chile. International journal of biometeorology, 63(4), 499-510.
Raju, K. S., Kumar, N. 2018. Impact of Climate Change on Water Resources. With Modeling Techniques and Case Studies. Springer, Singapore.
Schleussner, C. F., Lissner, T. K., Fischer, E. M., Wohland, J., Perrette, M., Golly, A., Mengel, M. 2016. Differential climate impacts for policy-relevant limits to global warming, the case of 1.5 C and 2 C. Earth system dynamics, 7, 327-351.‏
Seneviratne, S. I., Donat, M. G., Mueller, B., Alexander, L. V. 2014. No pause in the increase of hot temperature extremes. Nature Climate Change, 4(3), 161-163.
Seo, Y. A., Lee, Y., Park, J. S., Kim, M. K., Cho, C., Baek, H. J. 2015. Assessing changes in observed and future projected precipitation extremes in South Korea. International Journal of Climatology, 35(6), 1069-1078.