[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 32, Number 1 (6-2017) ::
geores 2017, 32(1): 110-120 Back to browse issues page
Identifying Trend Patterns of Mean Relative Humidity in Isfahan Province
Abstract:   (244 Views)

Increased greenhouse gases in the atmosphere not only cause global warming but also cause changes in the behavior of meteorological parameters such as moisture in the air. The purpose of this research is to identify patterns of mean relative humidity in Isfahan in the past half a century. In this regard, the monthly mean relative humidity of 21 stations inside and outside the province during the period of 1961 to 2010 were analyzed. First homogeneity and normality of data were measured. Then station data were arranged in a matrix with the dimensions of 21×600 and the T mode, and were converted into pixel data with dimension of 5×5 square km through programming and interpolation by Kriging method. Then the data that were outside the province area were removed and 4260 pixels remained. In the next stage Mann - Kendall test was used to reach the trend for each pixel and the resulting trends were zoned and analyzed. The results indicate during February to November the decreasing trend covers most of the province, and by contrast, in the months of January and December there is no specific trend to be observed. Studies on the rate of change of relative humidity, confirmed that the greatest reduction in relative humidity happens during the months of February, August, March and April. In general, in the studied period, decreased the average relative humidity of Isfahan Province had decreased to 10/02 %.

Keywords: Mann - Kendall test, Isfahan province, Trend, Relative humidity
Full-Text [PDF 1659 kb]   (93 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/06/13 | Accepted: 2017/06/13 | Published: 2017/06/13
References
1. Alvi, Sh. (1994), Climate change, desertification and the Republic of Sudan, Geojournal, vol 33, No 4, pp. 393-399.
2. Andreas Fries, R., Rütger, T. Nau, P. ,Thorsten, Bendix, J. (2012), Near surface air humidity in a megadiverse Andean mountain ecosystem of southern Ecuador and its regionalization, Agricultural and Forest Meteorology, 152, pp. 17– 30.
3. Alan Barreca, I. (2012), Climate change, humidity, and mortality in the United States, Journal of Environmental Economics and Management 63, pp. 19–34.
4. Ataei, H, Fanaei, R. (2014), Usage Mann-Kendall non-parametric test to detect the maximum elative humidity changes of Isfahan province, Scientific Journals Management System, Vol. 14, No. 34, pp. 111-132. (in Persian).
5. Ataei, H, Fanaei, R. (2016), Recognition behavior patterns mean maximum temperature using non-parametric tests (Case Study: Isfahan Province), Journal of Geographical Notion, Vol. 8, No. 15, pp. 86-102. (in Persian). 6. Azizi, G, Roshani, M. (2008), The study climate change in the southern coast of the Caspian by methode Mann-Kendall , Geographical research , No. 64, pp. 13-28. (in Persian).
6. Azizi, G, Roshani, M. (2008), The study climate change in the southern coast of the Caspian by methode Mann-Kendall , Geographical research , No. 64, pp. 13-28. (in Persian).
7. Bahak, B. (2015), prediction and assessment of long-term temporal patterns of temperature and its effect on evaporation and definition Zahedan, Geography journal, Num. 44, pp. 239-257. (in Persian).
8. Diaz, HF., Giambelluca, Tw. Eischeid, J. K. (2011), Changes in the vertical profiles of mean temperature and humidity in the Hawaiian Island, Global and Planetary Change 77, pp. 21–25.
9. Eini, S, Tavoosi, T, Amirjahanshahi, M. (2016), Modeling minimum temperature East Kermanshah province, journal of geographical space, vol 16, Num. 54, pp. 47-67. (in Persian).
10. Farajzadeh, M, Feizi, V, Molashahi, M. (2010), Studying the climate change in North- West Iran by Mann-Kendall method, Congress Geography applications in environmental planning, Khorramabad. (in Persian).
11. Gharekhani, A, Ghahreman, N. (2010), Seasonal and annual variation of relative humidity and dew point in a climate of Iran, Journal of Water and Soil, Vol. 24, No 4, pp. 636-646. (in Persian).
12. Guangxing Lin, X., Zuntao F. (2007), Temporal–spatial diversities of long-range correlation for relative humidity over China, Physica A 383, pp. 585–594.
13. Karimi, M, Farajzadeh, M. (2011), Humidity flux and spatial patterns in resource humidity supply precipitation of Iran , Journal of Applied Research Geographical Sciences , Vol. 19, No 22, pp. 109-127. (in Persian).
14. Kosari, M, Ekhtesasi, M, Tazeh, M, Saremi, M. (2008), A Survey of variation trend of precipitation, temperature and relative humidity of 26 synoptic stations, Journal of Pajouhesh & Sazandegi, pp. 196-207. (in Persian).
15. Moghimi, E. (1999), Statistical analysis of relative humidity and precipitation in a period of 30 years in Tehran, Geographical Research Quarterly, pp. 43-61. (in Persian).
16. Omidvar, K, Khosravi, Y. (2010), Some elements of climate change on the northern coast of Persian Gulf using Mann-Kendall Test, Journal of Geography and Environmental Planning, twenty one years, No, 2, pp. 33-46. (in Persian).
17. Rahimzadeh, F, Khoshkam, M. (2003), changes of humidity Series in the country synoptic stations , Third Regional Conference and National Conference Climate change , Esfahan. (in Persian).
18. Shatilina, T. A. (2010), Peculiarities of surface air temperature variations over the FAR East regions in 1976-2005. Russian Meteorology and Hydrology, Vol. 35, Num. 11, pp. 740-743.
19. Shen, S. S. (2011), The twentieth century contiguous us temperature changes indicated by daily and higher statistical moments. climatic change, online first.
20. Shuhong, Wu., Aigang, L. , Longqing, Li. ( 2011), Spatial and temporal characteristics of minimum temperature in winter in china during 1961-2010 from NCEP/NCAR reanalysis, Theoretical and Applied climatology, online first.
21. Tao, h. G. (2011), Assessment of CMIP3 climate models and projected changes of precipitation and temperature in Yangtze River basin china. Climate change, online first.
22. Xie, h. Y. (2010), Warming and drying trends on the Tibetan Plateau 1971-2005. Theoretical and Applied climatology, Vol. 101, Num. 3-4, pp 241-253.
23. Yue, S. H. (2003), Temperature tends in Japan 1900-1996, Theor, Appl, Climatol, 75, pp. 15-27.
24. Zhen Yu, Li. (2015), Recent trends in daily temperature extremes over northeastern China (1960–2011), Quaternary International.
Add your comments about this article
Your username or email:

Write the security code in the box >



DOI: 10.18869/acadpub.geores.32.1.110


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Identifying Trend Patterns of Mean Relative Humidity in Isfahan Province. geores. 2017; 32 (1) :110-120
URL: http://georesearch.ir/article-1-106-en.html
Volume 32, Number 1 (6-2017) Back to browse issues page
فصلنامه تحقیقات جغرافیایی Geographical Researches Quarterly Journal
Persian site map - English site map - Created in 0.046 seconds with 812 queries by yektaweb 3461