جستجوی مقالات مرتبط با کلیدواژه « north west iran » در نشریات گروه « علوم انسانی »

This study uses background data collectd from a field work carried out in Boiniyoghon castle. Three seasons of excavations (2004-2007) revealed valuable remains from the Middle Bronze Age to the Safavid period. This paper at first describes briefly the process of excavation in the trench A of work place1 and then explains the appearance of the first millennium BC Painted Wares according their stratigraphic locations. At the end the distribution of the Wares caracterized here as Ardebil style were discussed. The relationships between Ardebil painted ware and triangular pottery of Hasanlu III is another issue which is addressed by present paper. Results obtained by this research shows that although in the lower lyers of trenches there have been many forms and types of pottery reflecting cultural continuity of Iron III, but ceramic samples of upper lyers indicate a gradual changes from Iron III to the late Achaemenid and to the early Parthian.

The prediction of probability of drought occurrence in different years and its mitigation measures are at the peak of drought management decisions. The aim of present research is the prediction of drought by the use of downscaling statistical methods and artificial data creation technique. For getting the work done, a synthetic study was carried out by utilization of meteorological stations data, the outputs of statistical analyses and finally using SPI drought index. First, artificial data was produced through CLIMGEN, then SPI value was predicted. Then Minitab software was used for the calculation and drawing of the trends in selected stations of the North West.  For validity approval the model was adapted by observational and produced data. The correlation between artificially created data and observed data was estimated by SPSS software. Results indicated a suitable validity for most of the stations. Accordingly, Ardebil, Jolfa, and Tekab show a smooth precipitation declining and drought increasing trend. Khoy, Mianeh, and Sardasht are among the stations which prove a moderate precipitation and increasing wet conditions, while there were not seen any changes in Tabriz, Urmia, and Parsabad stations.

The chill wind index is represented to demonstrate relationship between human discomfort due to the joint effect of wind and temperature. Parts of Iran, such as Northwestern sometimes experience very extreme cold weather and frost associated with violent winds which can be detrimental to human health and other flora and fauna. Therefore, the main objective of this study is evaluating of the chill wind index as one of the significant indices of body comfort and finding the synoptic patterns which are related to this index in the Northwestern of Iran. To do so, the climatic data for the January, February and December months of a 26 years statistical period (1980-2006) were extracted from the synoptic stations of Northwestern of Iran and data include pressure, temperature, wind speed components (U&V) in different levels and in hourly scale which were extracted for sample days with the highest chill wind index from NCEP/NCAR. Composite maps of temperature advection, pressure, wind vector and speed in middle levels and lower levels (850Hpa) and sea level were generated by GRADS software. Also, for calculating the chill wind index the Sipel-Passele’s equation was used. The results illustrate that chill winds mostly happened under the two patterns: Deep trough and blocking. Cold advection in both patterns is provided from three sources: High pressure in Northern Africa and Southern Europe, Deep trough over the Siberia (north of the Black Sea) and weak high pressure over the southern part of the Black Sea.