تعیین روند تغییر دمای خاک در اقلیم‌های مختلف استان کرمانشاه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه جغرافیا، دانشکده ادبیات و علوم انسانی، دانشگاه لرستان، خرم آباد، ایران

2 استادیار آب‌و‌هواشناسی، گروه جغرافیا، دانشکده ادبیات و علوم انسانی،دانشگاه لرستان، خرم آباد، ایران

3 استادیار آب و هواشناسی، گروه جغرافیا، دانشکده ادبیات و علوم انسانی، دانشگاه لرستان، خرم آباد، ایران

چکیده

تعیین روند تغییر دمای خاک، به دلیل ارتباط تنگاتنگ با مدیریت پایدار کشاورزی از اهمیت ویژه‌ای برخوردار است. در این تحقیق، به منظور بررسی روند تغییر دمای خاک سه ایستگاه کنگاور، کرمانشاه و سرپل‌ذهاب که دارای اقلیم‌های مختلف هستند، سری داده‌های روزانه دمای خاک 25 ساله (1993 تا 2018) این ایستگاه‌ها، از سازمان هواشناسی کشور اخذ شد. با استفاده از میانگین‌های روزانه دمای خاک، میانگین‌های دوره گرم سال (بهار و تابستان)، دوره سرد سال (پاییز و زمستان) و سالانه بر اساس تقویم شمسی، تنظیم و محاسبه شدند. از دو آزمون من-کندال و تخمینگر شیب سِن، برای تحلیل روند دمای خاک در سطوح اطمینان 95% و 99%، استفاده شد. تحلیل سری داده‌های ایستگاه‌ سینوپتیک کنگاور، حاکی از وجود روند افزایشیِ معنی‌دار در دمای خاک توسط هر دو آزمون بود. در ایستگاه کرمانشاه، علیرغم صعودی بودن مقادیر دمای خاک در همه اعماق موردنظر، معنی‌داری در روند میانگین سالانه دمای خاک مشاهده نشد. ایستگاه سرپل‌ذهاب نیز هیچ‌گونه روندی را نشان نداد. در ایستگاه‌های کنگاور و کرمانشاه، روند افزایش دمای قسمت‌های سطحی خاک، مقدار بیشتری را نشان داد که به دلیل تأثیرپذیری بیشتر بین دمای سطح خاک و دمای هوا است. متوسط افزایش دمای عمق 5 سانتیمتری خاک برای ایستگاه کرمانشاه 04/0 درجه سلسیوس در سال و ایستگاه ‌کنگاور 1/0 درجه سلسیوس در سال برآورد شدند. افزایش میانگین سالانه دمای خاک ایستگاه‌های دارای روند افزایشی، عمدتاً ناشی از ذخیره‌سازی گرما، در دوره گرم سال تشخیص داده شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determination of Soil Temperature Change Trend in Different Climates of Kermanshah Province

نویسندگان [English]

  • shahram Hemati 1
  • behrouz nasiri 2
  • mostafa Karampoor 3
1 PhD student, Geography department, literature and humanities sciences faculty, lorestan university, Khorramabad, IRAN
2 Assistant Professor of Climatology, Department of Geography, Literature and humanities faculty, Lorestan University, Khorramabad,Iran
3 Assistant Professor of Climatology, Department of Geography, Literature and humanities faculty, Lorestan University, Khorramabad, Iran
چکیده [English]

Determining the trend of soil temperature change is of special importance due to the close relationship with sustainable agricultural management. In this study, in order to investigate the trend of soil temperature change in three stations of Kangavar, Kermanshah and Sarpolzahab, which have different climates, a series of daily soil temperature data for 25 years (1993 to 2018) of these stations were obtained from the meteorological organization of the country. Using daily averages of soil temperature, the averages of warm period (spring and summer) and cold period of the year (autumn and winter) and the averages of annual were adjusted and calculated based on the solar calendar. Mann-Kendall and Sen’s slope estimator tests were used to analyze the soil temperature trend at 95 and 99% confidence levels. Analysis of Kangavar synoptic station data series showed a significant upward trend using the both tests for annual soil temperature averages. In Kermanshah station, despite the increase in soil temperature values ​​at all depths, no significant trend in the average annual soil temperature was observed. Sarpolzahab station also did not show any trend. In Kangavar and Kermanshah stations, the increasing trend in soil surface temperature showed a higher value, which is due to the greater influence between soil surface temperature and air temperature. The average of temperature increase in 5-cm soil depth for Kermanshah and Kangavar stations were estimated to be 0.04 and 0.10 degree of Celsius per year, respectively. The increase in the average annual soil temperature of stations with increasing trend was recognized in the warm period of the year, mainly due to heat storage.

کلیدواژه‌ها [English]

  • Mann-Kendall
  • Sen’s slope
  • warm period
  • Cold period
  • Soil depths
Alijani, B. (2008) Climate of Iran(8th edition). Payam-noor University: Tehran.( In farsi).
Asadi, L., Hezarjaribi,A., Ghorbani, Kh., Agha shariatmadari, Z and Zakeri nia, M. (2013). Investigation of variation of soil depths temperature changes using Mann-Kendall test Case study: Gorgan synoptic station, The first national conference on water and agricultural resources challenges of the irrigation and drainage association of Iran, Islamic azad University , Branch of Khorasgan  of Isfahan.(In farsi).
Barman, D., Kundu, D K.,  Soumen, P., Susanto, P., Chakraborty, A K.,  Jha, A K.,  Mazumdar, S P.,  Saha, R and Bhattacharyya, P. (2017). Soil temperature prediction from air temperature for alluvial soils in lower Indo-Gangetic plain, International Agrophysics, No31, 9-22.
Delgado, JA.,Groffman, PM., Nearing, MA., Goddard, T., Reicosky D. (2011). Conservation practices to mitigate and adapt to climate change. Journal of soil and water conservation, 66(4): 118-129.
Golshan, S., Reini sarjaz, M and Norouz velashdi, R. (2015). Investigating and detecting the effect of global warming on soil temperature changes and estimation by regression correlation method- Journal of soil and water conservation research, No.4, pp.121-138.( In farsi).
Ghahreman, N., Bazrafshan, J and Gharekhani, A. (2010). Trend analysis of soil surface temperature in several regions of Iran. 19th World Congress of Soil Science, Soil Solutions for a Changing World. 1– 6 August 2010, Brisbane, Australia. Published on DVD.
Guangyong, Y., Yiping Zh., Schaefer, D., Liqing, Sh., Yuhong, L., Hede, G., Zhenghong, T., Zhiyun, L., Chuansheng, W and Youneng, X. (2012). Short Communication Observed air/soil temperature trends in open land and understory of a subtropical mountain forest, SW China. International journal of climatology Int. J. Climatol.
Hemadi, K and Zakeri Hoseini, F.(2014).The effect of climate change on the surface profile of soil in Ahvaz. Professional water sciences & engineering. Islamic azad University. Ahvaz branch. 4th year. 10:75-85.(In farsi).
Jafarpoor, Sh and Kanooni, A. (1394) Climate change scenarios in the fifth report of the Intergovernmental Panel on Climate Change and its comparison with the previous report, Second National Conference on Conservation of Natural Resources and Environment, Ardabil, Mohaghegh Ardabili University, 13th and 14th esfand, pp1-8.(In farsi).
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.
Mirmosavi, S. H., Shafiei, Sh. (2009). Application of multivariate statistical methods for the study of climatic characteristics of the Western region of Iran (Kermanshah, Kurdistan, Hamedan, Ilam, Lorestan). Journal of Geographical Notion, 3(5): 96-117. (In farsi)
 Mohammadi, M and Forouzanfard, M. (2016). Investigation of temperature trends of different soil depths In some Iranian climate samples, Journal of Climatological Research, 7th year,No. 25 th and 26 th, spring and summer 1395,pp 127-140. (In farsi).
Qian, B., Gregorich, E. G., Gameda, S., Hopkins, D. W., & Wang, X. L. (2011). Observed soil temperature trends associated with climate change in Canada. Journal of Geophysical Research atmospheres, 116, D02106.
Salmi, T., Määttä, A., Anttila, P. & Ruoho, T, Amnell, T . (2002). Detecting trends of annual values of atmospheric pollutants by the Mann-Kendall test and Sen’s slope estimates –the Excel template application MAKESENS. Publications on Air Quality. No 31: Report code FMI-AQ- 31.
Sharratt, B. S. (1992). Growing season trends in the alaskan climate record, Arctic45, 124–127. Year book, 2005-2006, Ministry of food, agriculture and live stock, Pakistan.
Shoyoukhi soghanlou, S., Golshan, S and Khoshravesh, M. (2018). Investigation of Temperature Changes in Soil Depths Using Parametric and Nonparametric Methods (Shahroud Station), Journal of Water and Soil Sciences (Agriculture and Natural Sciences and Technologies),22 th year,No.4,pp.29-39. (In farsi).
Svilicic. P., and V, Vucetic.(2015). Spatial and seasonal variability of extreme soil temperature in Croatia. Geophysical research. 17: 26-36.
Turgay, P., and Ercan, K. (2005). Trend analysis in turkish precipitation data. Hydrological processes published online in wiley interscience (www.Interscience.wiley.com)
Wang, L., Henderson, M., Binhui, L., Xiangjin, S., Xiangwei, C., Luyao, L and Daowei, Zh., (2018). Maximum and Minimum soil surface temperature trends over China-1965-2014, Journal of Geophysical Research Atmospheres. Vol. 123, issue.4, pp.2004-2016.
Yesilirmark. E. (2014). Soil temperature trends in B¨ uy¨ uk Menderes Basin, Turkey. Meteorol. Appl. 21: 859–866.