Search published articles


Showing 2 results for Airs

Dr. Ali Bayat, Mr. Saeed Mashhadizadeh Maleki,
Volume 19, Issue 53 (6-2019)
Abstract

Precipitable Water Vapor (PWV) is one of the most important quantities in meteorology and climate studies. PWV in Earth's atmosphere can be measured by Sun-photometer, the Atmospheric Infrared Sounder (AIRS), and radiosonde from surface, atmosphere and space-based systems, respectively. In this paper, we use PWV measured by Sun-photometer located in Institute for Advanced Studies in Basic Sciences (IASBS), AIRS and 29 Iranian synoptic stations data include temperature, dew-point temperature, pressure and relative humidity. For validation of AIRS data, the correlation coefficient between AIRS and Sun-photometer data calculated. The correlation is 90%. Average of PWV measured with sun-photometer and AIRS are 9.8 and 10.8 mm, respectively. Pearson's correlation coefficients between PWV of AIRS  data set and temperature, dew-point temperature, pressure and relative humidity for synoptic stations are calculated. Correlation between PWV and temperature, dew-point temperature, pressure, and humidity are 73%, 74%, -40% and -30%, respectively. PWV and temperature correlation coefficient map shows a positive trend between latitude and correlation coefficient. Rising a degree in latitude lead to increasing 2.8 percent in the correlation coefficient.

Mr Amin Jairan, Mr Foead Purarian,
Volume 19, Issue 54 (9-2019)
Abstract

The Qajar government in Iran was based on the geopolitical conditions of the expansionism of the European states, including Russia, Britain and France in the Middle East. On the other hand, the geopolitical position of Iran in the issues and interests of the regional powers of the great powers, brought about the importance and attention to the court of Iran, and this geopolitical attention and importance was the basis of Iran's foreign relations with superpowers of time. On this basis, the Iranian government established a network of ministries to handle foreign affairs. Thus, the analysis of the Ministry of Foreign Affairs' performance in Iran's political relations with foreign governments between the years (1200-1226), which reflects the geopolitical conditions of Iran during that period in the region and the international environment, can for the date Institutes and geopolitics can be solved. In this regard, this research is explained in a descriptive-analytical manner and its data and information are based on documents, manuscripts and library resources. The results of the research indicate that the foreign minister, as a manifestation of the State Department, in this historical period, while acknowledging the fact that Iran's geopolitical position in the region and international order has entered into its superficial duties, is due to the influence of other elements of power In the large-scale foreign decision-making, the role of the ceremonial role with its limited powers is diminished. But although the State Department was not able to decide independently of the other pillars of power, it was the ambassadors of this period who, by understanding the geopolitical position of Iran and the global conditions that could conceal the weak diplomacy of the Qajar apparatus and fill the vacuum of Iran's foreign policy apparatus.



Page 1 from 1     

© 2024 CC BY-NC 4.0 | Applied researches in Geographical Sciences

Designed & Developed by : Yektaweb