IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2016  > Vol13 No.2
Trends in major and minor meteorological variables and their influence on reference evapotranspiration for mid Himalayan region at east Sikkim, India
Shweta YADAV; Proloy DEB; Sonu KUMAR; Vanita PANDEY; Pankaj Kumar PANDEY
Corresponding AuthorProloy DEB
2016-02
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume13Issue:2Pages:302-315
Subtype期刊论文
AbstractEstimation of evapotranspiration (ET) for mountain ecosystem is of absolute importance since it servesas an important component in balancing the hydrologic cycle. The present study evaluates the performance of original and location specific calibrated Hargreaves equation (HARG) with the estimates of Food and Agricultural Organization (FAO) Penman Monteith (PM) method for higher altitudes in East Sikkim, India.The results show that the uncalibrated HARG model underestimates ET0 by 0.35 mm day-1 whereas the results are significantly improved by regional calibration of the model.In addition, this paperalso presents the variability in the trajectory associated with the climatic variables with the changing climate in the study site. Non-parametric Mann-Kendall (MK) test was used to investigate and understand the mean monthly trend of eight climatic parameters including reference evapotranspiration (ET0) for the period of 1985 - 2009. Trend of ET0 was estimated for the calculations done by FAO PM equation. The outcomes of the trend analysis show significant increasing (p ≤ 0.05) trend represented by higher Z-values, through MK test, for net radiation (Rn), maximum temperature (Tmax) and minimum temperature (Tmin), especially in the first months of the year. Whereas, significant (0.01 ≥ p ≤ 0.05) decreasing trend in vapor pressure deficit (VPD) and precipitation (P) is observed throughout the year. Declining trend in sunshine duration, VPD and ET0 is found in spring (March - May) and monsoon (June – November) season. The result displays significant (0.01≤p ≤ 0.05) decreasing ET0 trend between (June - December) except in July, exhibiting the positive relation with VPD followed by sunshine duration at the station.Overall, the study emphasizes the importance of trend analysis of ET0 and other climatic variables for efficient planning and managing the agricultural practices, in identifying the changes in the meteorological parameters and to accurately assess the hydrologic water balance of the hilly regions.
KeywordReference Evapotranspiration (Et0) Climatic Variables Trend Analysis Mann-kendall’s Test Monthly Variation East Sikkim Hilly Region
DOI10.1007/s11629-014-3238-3
Indexed BySCI
Language英语
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/14076
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.2
Recommended Citation
GB/T 7714
Shweta YADAV,Proloy DEB,Sonu KUMAR,et al. Trends in major and minor meteorological variables and their influence on reference evapotranspiration for mid Himalayan region at east Sikkim, India[J]. Journal of Mountain Science,2016,13(2):302-315.
APA Shweta YADAV,Proloy DEB,Sonu KUMAR,Vanita PANDEY,&Pankaj Kumar PANDEY.(2016).Trends in major and minor meteorological variables and their influence on reference evapotranspiration for mid Himalayan region at east Sikkim, India.Journal of Mountain Science,13(2),302-315.
MLA Shweta YADAV,et al."Trends in major and minor meteorological variables and their influence on reference evapotranspiration for mid Himalayan region at east Sikkim, India".Journal of Mountain Science 13.2(2016):302-315.
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