Assessment of future changes in the maximum temperature at selected stations in Iran based on HADCM3 and CGCM3 models     

Mohsen Abbasnia  Taghi Tavousi  Mahmood Khosravi 《Asia-Pacific Journal of Atmospheric Sciences》2016,52(4):371-377

Identification and assessment of climate change in the next decades with the aim of appropriate environmental planning in order to adapt and mitigate its effects are quite necessary. In this study, maximum temperature changes of Iran were comparatively examined in two future periods (2041-2070 and 2071-2099) and based on the two general circulation model outputs (CGCM3 and HADCM3) and under existing emission scenarios (A2, A1B, B1 and B2). For this purpose, after examining the ability of statistical downscaling method of SDSM in simulation of the observational period (1981-2010), the daily maximum temperature of future decades was downscaled by considering the uncertainty in seven synoptic stations as representatives of climate in Iran. In uncertainty analysis related to model-scenarios, it was found that CGCM3 model under scenario B1 had the best performance about the simulation of future maximum temperature among all of the examined scenario-models. The findings also showed that the maximum temperature at study stations will be increased between 1°C and 2°C in the middle and the end of 21st century. Also this maximum temperature changes is more severe in the HADCM3 model than the CGCM3 model.  相似文献   

Groundwater risk mapping prediction using mathematical modeling and the Monte Carlo technique   总被引：1，自引：0，他引：1  

Fatemeh Jafari  Saman Javadi  Golmar Golmohammadi  Kourosh Mohammadi  Ahmad Khodadadi  Mohsen Mohammadzadeh 《Environmental Earth Sciences》2016,75(6):491

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Drought prediction using co-active neuro-fuzzy inference system,validation, and uncertainty analysis (case study: Birjand,Iran)     

Hadi Memarian  Mohsen Pourreza Bilondi  Majid Rezaei 《Theoretical and Applied Climatology》2016,124(3-4):541-554

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Spatio-temporal analysis of crime by developing a method to detect critical distances for the Knox test   总被引：1，自引：0，他引：1  

Mohsen Kalantari  Bamshad Yaghmaei  Somaye Ghezelbash 《International journal of geographical information science》2016,30(11):2302-2320

The present study examined and compared spatio–temporal interaction of the theft of car parts, shop burglary and motorcycle theft in the central business district (CBD) of the city of Zanjan in Iran. The Knox test was selected to detect spatio–temporal interaction. This test has been criticized as being subjective because the selection of critical distances is arbitrary; thus, a method is proposed to detect critical distances in the Knox test using the mean distance, natural breaks classification of nearest neighbour (NN) distance and Ripley’s k function. Results show obvious differences between the spatio-temporal clusters of the three sets of crimes. They also indicate that changing the spatial cut-offs within a cluster creates different temporal patterns. Of the three criteria for determining critical distances, NN classification based on natural breaks showed more interactions than the other methods.  相似文献   

Modeling the exceptional south Foehn event (Garmij) over the Alborz Mountains during the extreme forest fire of December 2005     

Abbas Mofidi  Iman Soltanzadeh  Yadollah Yousefi  Azar Zarrin  Mohsen Soltani  Jafar Masoompour Samakosh  Ghasem Azizi  Samuel T. K. Miller 《Natural Hazards》2015,75(3):2489-2518

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Evaluation of earthquake mitigation measures to reduce economic and human losses: a case study to residential property owners in the metropolitan area of Shiraz,Iran     

Mehdi Sadeghi  Stefan Hochrainer-Stigler  Mohsen Ghafory-Ashtiany 《Natural Hazards》2015,78(3):1811-1826

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Sedimentological,Geochemical and Hydrogeochemical Studies of Alluvial Fans for Mineral and Environmental Purposes (Case Study of Southwestern Iran)     

Saeid Pourmorad  Harami  Reza Mousavi  Solgi  Ali  Aleali  Mohsen 《Lithology and Mineral Resources》2021,56(1):89-112

Lithology and Mineral Resources - The alluvial-fan sediments play a very important role in mineral reserves and underground water resources, though a comprehensive study on such sediments,...  相似文献   

Thermal instability and the effects of cosmic-ray diffusion     

Mohsen Shadmehri 《Monthly notices of the Royal Astronomical Society》2009,397(3):1521-1527

We study the dynamical effects of cosmic rays (CRs) on thermal instability in the linear regime. CRs and the thermal plasma are treated as two different interacting fluids, in which CRs can diffuse along the magnetic field lines. We show that the growth rate of the magnetothermal condensation mode is reduced because of the existence of CRs, and this stabilizing effect depends on the diffusion coefficient and the ratio of CR pressure to gas pressure. Thus, a slower rate of structure formation via thermal instability is predicted when CRs are considered.  相似文献   

Kelvin–Helmholtz instability in a weakly ionized layer     

Mohsen Shadmehri  Turlough P. Downes 《Astrophysics and Space Science》2007,312(1-2):79-84

We study the linear theory of Kelvin–Helmholtz instability in a layer of ions and neutrals with finite thickness. In the short wavelength limit the thickness of the layer has a negligible effect on the growing modes. However, perturbations with wavelength comparable to layer’s thickness are significantly affected by the thickness of the layer. We show that the thickness of the layer has a stabilizing effect on the two dominant growing modes. Transition between the modes not only depends on the magnetic strength, but also on the thickness of the layer.  相似文献   

The fast Hankel transform1     

Adel A. Mohsen  E.A. Hashish 《Geophysical Prospecting》1994,42(2):131-139

An efficient algorithm is presented to compute the Hankel transform. The algorithm yields simultaneously all the required weights for a given order of the Bessel function using the fast Fourier transform. An additional shift is introduced to the filter abscissa besides Koefoed's shift to give a better filter performance.  相似文献