Keywords
emprendimiento
ventajas competitivas y ventajas comparativas
How to Cite
Abstract
ABSTRACT
The purpose of this study is to study the probable deviation of temperature and precipitation elements in the northwest of the country from normal. For this purpose, at first, the time series of the minimum temperature and the monthly precipitation of the selected synoptic meteorological stations of the region for the past half century (1956-2005) were collected and adjusted. The statistical deficiencies of some series were corrected by the double mass method, in order to investigate and recognize the changes of the time series The Kendall test and the Mann-Kendall statistical-graphic statistical test were used and the type and time of the change of data were determined. The results of the research show that assuming randomness of the data It is strongly rejected and the trend situation is dominant on the data. Based on the graphic diagrams, changes in the parameters u and u mean minimum temperature and rainfall in the region over the past half century have been changed. These changes are short-term fluctuations and trend. This is most evident in most time series since the 1990s. In terms of the distribution of time and location of major precipitation in the region, especially in the east and west of Lake Urmia, sudden changes and significant mutation And during the 1990s and 2000s, the steep slope was on the downside of the medium-temperature minimum and precipitate series. In terms of the average temperature, there is a minimal contrast between the west and east of the region. Thus, in the west of Lake Urmia mutations and sudden changes are significant in the negative direction. But in the eastern lake (Tabriz), a significant temperature mutation in most of the months of the year is a positive one, which is likely to be a recent phenomenon of recent urbanization in this regional contradiction. In northern and southern parts of the region, no significant changes were observed in terms of temperature and the normal state was observed.
References
Asakereh, Hossein (2004), "Statistical analysis of annual average temperature changes in Zanjan city during recent decades", No.-9: 30-52-53.
Azizi, Qasim and Roshani, Mahmoud (2008, "Study of Climate Change in the Southern Coast of the Caspian Sea by the Man-Kendall Method", Geographic Peoples, 13-28.
Boroujerdi's message: Khadem, Sohrab, and Irannejad, Parisa (2005), "Investigating the trend of rainfall changes in Iran during the period 1960 to 2001". Doctoral dissertation on Meteorology. Islamic Azad University, Science Research Branch.
Clarke, T.S., (2003); Regional Climate Change: “ Trend Analysis of Temperature and Precipition Seris at Canadian Sites”, Canadian Jurnal of Agricultural Economics, 48: 194-210.
Cortreal, J. Qian, B. & Xu, H., (1998), "Regional Claimate Change in Portugal: recipitation Variability Associa with Large- Scale Atmospheric Circulation'' Int. J. Climatol, 18: 619- 635.
Dejongh , M.I. Verhoest, C.N., & Troch, D.F., (2006) “ Analysis of a 105- Year Time Series of Precipitation Observed at Uccle, Belgium”™”™ Int. J. Climatol, 26: 2023-2039.
Dettinger, M.D. Cayan, D.R. Meyer, M. & Jeton A.E ., (2004), “S imulated hydrologic responses to climate variations and change in the Merced, Carson, and American River basins, Sierra Nevada, California, 1900-2099.” Climate Change, 62: 283-317.
Dracup, J.A. & Vicuna, S., (2005), “An Overview of Hydrology and Water Resources Studies on Climate Change: the California E xperience.” Proc. EWRI 2005: Impacts of Global Climate Change.
Ghayour, Hasanali and Asakereh, Hossein (2003), "Application of Fourier Models in Estimating Monthly Temperatures and Its Future, Case Study, Mashhad Temperature", Third Regional Conference and First National Conference on Climate Change, Isfahan University.
Hajam, Sohrab, Khashkhoo, Younes and Shamsaledinvandi, Reza (2008, "Analysis of seasonal and annual rainfall variations of the selected station in the central region of Iran using non-parametric methods", Geographical research, 168-157.
Ha, J.K, Ha, E., (2006), “ Climatic Change and Interannual Fluctuation in the Long-term Record of Monthly Precipitation for Seoul”™”™ Int. J. Climatol, 26: 607-618.
Ha, J.K. Park, S. & Kim, K., (2005), “On interannual characteristics of Climate Prediction Center merged analysis precipitation over the Korean peninsula during the summer monsoon season”. International journal of climatology, 25, 99-116.
IPCC: (2001b), "Climate change 2001: The Scientific Basis;, Contribution of Working Group Ito the Third Assessment Report of the Intergovernmental panel on Climate Change(IPCC)" Houghton, J.T. Dinggs. Y. Noguer, M.P.J. Linden, V.X. Maskell, D.K. & Johnson, C.A., "Cambridge University Press, Cambridge, UK.881.
Kaviani, Mohammad Reza and Asakereh Hossein (2003), "Statistical survey of the long-term annual precipitation trend in Isfahan", Third Regional Conference and First National Conference on Climate Change, Isfahan University, 2003, 251-260.
Lettenmaier, D.P. Wood, E.F. & Wallis, J.R. (1994), "Hydro-climatological Trends in the Continental United States, 1948 88. J.Climate, 7:586 607.
Marengo, J.A. & Camargo, C.C., (2008), “Surface air Temperature Trends in Southern Brazil for 1960- 2002”™”™ Int. J. Climatol, 28: 893- 904.
Mazki, Alireza, Nasiri Mahallati, Mehdi, Soltani, Afshin, Sharifi, Hamid Reza, Kamali, Gholamali and Rezvani Moghdam, Parviz (2003), "Simulation of Iran's climate change in terms of doubling of CO2 concentration by the general models of desertification" , .178-190:
Miro,J. J., Estrela, J.M., & Millan, M., (2006), “ Summer Temperature Trends In A Mediterranean Area (Valencia Region)”™”™ Int. J. Climatol, 26: 1051- 1073.
North, G.R., & Kim, K.Y., (1995), “Detection of Forced Climate Signals” Part II: Simulation results", Journal of Climate, 6: 409-417.
Rahimzadeh, Fatemeh, Khoshkam, Mahboubeh and Asgari, Ahmad (2004, "Investigation of changes in moisture series at synoptic stations of the country", No.-39: 55-59.
Shahabfar, Alireza; Mohammad Niagharaee, Shahab and Javdani Khalifa, Naser (2003), "The Study of Time Changes in Ice Days in Mashhad", Third Regional Conference and First National Conference on Climate Change, Isfahan University, 74-81
Statisticians; (1377) "User's Guide", SPSS 6.0 for Windose, Second Cultural Center, Hami Publishing House, Tehran, .533.
Tabatabaee, Seyed Ali and Hosseini, Mehrdad (2003), "Climate Change Survey in Semnan Based on Monthly Precipitation Parameters and Average Monthly Temperature", Third Regional Conference and First National Conference on Climate Change, Isfahan University, 2003, .91-98.
Zahedi, Majid and Sari Sarraf, Behrouz (2007), "Analysis of temporal-temporal variations of temperature in the north-west region of Iran", Geography and Development, 183 -198: 10
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