نتایج جستجو برای: the air temperature trend has been increasing during recent decades

تعداد نتایج: 16469350  

ژورنال: علوم آب و خاک 2022

Determining the actual evapotranspiration value and analyzing its temporal trend is essential for optimal water resources management in a basin. In the present paper, the actual evapotranspiration time series is simulated and its trend is analyzed according to the trend of climatic variables and land use in the Ajichi basin during the period of 2015-1987. The comprehensive SWAT model was set up...

Journal: :environmental resources research 2013
gholamreza roshan

this analysis was conducted on 31 synoptic stations in iran. initially, the mann-kendall test was administered in order to analyse the trend of alterations of these two components over time and the results suggest that 16% of the stations show significant relationship with annual precipitation (positive and negative). more stations showed significant relationships between sunspots and minimum a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه امام رضا علیه السلام - دانشکده زبانهای خارجی 1393

writing an academic article requires the researchers to provide support for their works by learning how to cite the works of others. various studies regarding the analysis of citation in m.a theses have been done, while little work has been done on comparison of citations among elt scopus journal articles, and so the dearth of research in this area demands for further investigation into citatio...

ژورنال: آبخیزداری ایران 2019
kAZEMZADEH, MAJID, Khalighi Sigaroudi, , Shahram, Malekian, Arash, Moghaddamnia, Ali Reza,

 Studying climate change impact on hydrological variables such as runoff has attracted more attention over recent years mainly due to the imposed imbalance in climate system by greenhouse gas emission. Hence, initially in this research, the trend and abrupt changes of hydro – climatic variables were studied using data mining approaches in 18 stations over 40 years (1972-2011) in Aji-Chai waters...

Journal: :Hong Kong Journal of Emergency Medicine 2006

In recent decades, research has growth Increasingly in Iran and, consequently, the country has risen dramatically in world rankings, based on the number of scientific documents. Meanwhile, research policy makers of different societies have concentrated, more and more, on "the effectiveness of researches" and today, their main concern is to ensure that researches are truly contributing to achiev...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Lewis Ziska Kim Knowlton Christine Rogers Dan Dalan Nicole Tierney Mary Ann Elder Warren Filley Jeanne Shropshire Linda B Ford Curtis Hedberg Pamela Fleetwood Kim T Hovanky Tony Kavanaugh George Fulford Rose F Vrtis Jonathan A Patz Jay Portnoy Frances Coates Leonard Bielory David Frenz

A fundamental aspect of climate change is the potential shifts in flowering phenology and pollen initiation associated with milder winters and warmer seasonal air temperature. Earlier floral anthesis has been suggested, in turn, to have a role in human disease by increasing time of exposure to pollen that causes allergic rhinitis and related asthma. However, earlier floral initiation does not n...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

Introduction: The occurrence of dust storms in deserts or arid regions increases the suspended dust particles to more than the allowed threshold, and this has negative effects on atmospheric conditions, human health and agricultural production. Positioning of Iran in the world arid and semi-arid belt is exposed to various types of dust storm systems. Occurrence of severe dust storms in most par...

پایان نامه :دانشگاه رازی - کرمانشاه - دانشکده ادبیات و علوم انسانی 1393

in recent years, there has been a growing interest among researchers to investigate the relationship betweenteacher self-efficacy and classroom behavior management, especially students misbehavior. therefore, this study aimed to comparatively investigate english and arabic teachers’ use of different behavior managementstrategies, their self-efficacy, and their success in an iranian context. th...

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