Diurnal temperature range (DTR) is an important indicator of climate change, and its variations can have significant impacts on public health, agricultural productivity, and the carbon cycle in terrestrial ecosystems. In this study, sixteen years of maximum and minimum temperatures over 16 locations in Egypt were collected, to analyze in order to identify the variations of (DTR) in Egypt especially in agriculture area. The differences between the study time series and normals were assessed at different levels of analysis of monthly, seasonal and annual averages. The results indicated that the DTR in Middle and Upper Egypt were the higher than Lower Egypt and the highest seasons for DTR were found during spring and summer seasons in Lower and Middle Egypt regions while in Upper Egypt region the highest DTR was found in spring season. The comparison between DTR at the study period (2000-2015) and the normals revealed a general increase for DTR during the period from 2005 to 2012 in Lower Egypt while in Middle and Upper Egypt the increased in DTR were found during the period from 2007 to 2015. Therefore, it could be concluded that there are a general change in DTR during the studied period this returned to the change in maximum and minimum temperature.

Khalil A. A

Diurnal temperature range, Maximum and Minimum temperature, Egypt.

1. Ben-Gai, T., Bitan, A., Manes, A., Alpert, P., Rubin, S., 1999. Temporal and spatial trends of temperature patterns in Israel, Theor. Appl. Clim., submitted.
2. Braganza K., D. J. Karoly, and J. M. Arblaster, “Diurnal temperature range as an index of global climate change during the twentieth century,” Geophys. Res. Lett., vol. 31, no. 13, L13217, 2004.
3. Brunetti M., L. Buffoni, M. Maugeri, and T. Nanni. Trends of Minimum and Maximum Daily Temperatures in Italy from 1865 to 1996. Theor. Appl. Climatol. Vol. 66, pp.  49 - 60, 2000.
4. Chen S, Fleischer SJ, Saunders MC, Thomas MB (2015). The influence of diurnal temperature variation on degree-day accumulation and insect  life history. PLoS ONE 10(3): e0120772. doi:10.1371/journal.pone.0120772.
5. Cohen, S., Stanhill, G., 1996. Contemporary climate change in the Jordan Valley. J. Appl. Meteorol. 35, 1051-1058.
6. Donglian Sun, Rachel T. Pinker, and Menas Kafatos. Diurnal temperature range over the United States: A satellite view. Geophysical research letters, vol. 33, L05705, doi:10.1029/2005GL024780, 2006.
7. Eastering DR, Meehl GA, Parmesan C, Changnon SA, Karl TR, Mearns LO. Climate extremes: observations, modelling, and impacts. Science. 2000; 289: 2068-2074. PMID: 11000103
8. Intergovernmental Panel on Climate Change, Climate Change 2001: The Scientific Basis, J. T. Houghton, Y. Ding, D. J. Griggs, M. Noguer, P. J. van der Linden, X. Dai, K. Maskell, C. A. Johnson, Eds. Cambridge, U.K.: Cambridge Univ. Press, 2001.
9. Kai Wang, Hong Ye, Feng Chen, Yongzhu Xiong, and Cuiping Wang. Urbanization Effect on the Diurnal Temperature Range: Different Roles under Solar Dimming and Brightening. Journal of climate. vol. 25, pp.1022-1027, 2011.
10. Kelsey n. Scheitlin.  Diurnal Temperature Range Variability due to Land Cover and Airmass Types in the Southeast. Journal of Applied Meteorology and Climatology. vol. 49, pp.879-888, 2010.
11. Keramitsoglou, I.; Kiranoudis, C.T.; Weng, Q. Downscaling geostationary land surface temperature imagery for urban analysis. IEEE Geosci. Remote Sens. Lett. 2013, 10, 1253-1257.
12. MakowsK. ki, M. Wild, and A. Ohmura. Diurnal temperature range over Europe between 1950 and 2005. Atmos. Chem. Phys., 8, 6483-6498, 2008.
13. Park H. S. and Joh M., “Climate change due to the gradual increase in atmospheric CO2: A climate system model sensitivity study,” Key Eng. Mater., vol. 277-279, pp. 595-600, 2005.
14. Scarino, B.; Minnis, P.; Palikonda, R.; Reichle, R.H.; Morstad, D.; Yost, C.; Shan, B.; Liu, Q. Retrieving clear-sky surface skin temperature for numerical weather prediction application from geostationary satellite data. Remote Sens. 2013, 5, 342-366.
15. Stone, D. A., and A. J. Weaver (2003), Factors contributing to diurnal temperature range trends in twentieth and twenty-first century simulations of the CCCma coupled model, Clim. Dyn., 20, 435- 445.
16. Travis D. Regional variations in U.S. diurnal temperature range for the 11-14 September 2001 aircraft groundings: evidence of jet contrail influence on climate. J Climate. 2004; 17: 1123-1134.
17. Turkes, M., Sumer, U.M., Kilic, G., 1996. Observed changes in maximum and minimum temperatures in Turkey. Int. J. Clim. 16, 463-477.

Publication Details
Published in : Volume 3 | Issue 8 | November-December - 2017 Date of Publication Print ISSN Online ISSN 2017-12-31 2395-1990 2394-4099
Page(s)	Manuscript Number		Publisher
115-120	IJSRSET1736223		Technoscience Academy
Cite This Article
Khalil A. A, "Assessment of Diurnal Temperature Range in Egypt", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 8, pp.115-120, November-December-2017. URL : http://ijsrset.com/IJSRSET1736223.php