این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
پژوهش های جغرافیای طبیعی، جلد ۴۹، شماره ۱، صفحات ۱۱۳-۱۳۳
عنوان فارسی تحلیل تغییرات ماهانۀ ارتفاع لایۀ تروپوپاز بر روی ایران
چکیده فارسی مقاله تروپوپاز لایه انتقالی از وردسپهر به پوش سپهر است. این لایه تعیین‌کننده حد بالایی و ضخامت وردسپهر است. در پژوهش حاضر از داده‌های ژرفاسنج مادون قرمز اتمسفری (AIRS) سنجنده مودیس آکوا ماهواره (EOS) استفاده شد. این محصول به شکل پارامترهای ژئوفیزیکی است و در شبکه‌ای به ابعاد 1×1 درجه قوسی توزیع شده است. این داده‌ها از 180- تا 180 طول جغرافیایی و 90 تا 90 عرض جغرافیایی موجودند که از سامانه تطبیقی پردازش مودیس (MODAPS) دریافت شدند. پس از بارگیری تصاویر مربوط به سال‌های 2003 تا 2015 میلادی، داده‌ها وارد نرم‌افزار MATLAB شد و مقادیر ارتفاعی تروپوپاز برای ماتریسی به ابعاد 12×155 برای هر سال محاسبه شد (155 معرف مقادیر شبکه‌های محاط در مرز ایران و دوازده ماه‌های سال‌اند). نتایج حاصل از پردازش‌های تصویر وارد محیط نرم‌افزار ArcGis10.2 شد و نقشه‌های هر ماه با استفاده از روش کریجینگ به واسطه کمترین مقدار خطا تهیه گردید. نتایج نشان داد در ماه فوریه بیشترین اختلاف ارتفاع بین جنوب و شمال کشور رخ می‌دهد. تقریباً در همه پهنه کشور منحنی هم‌ارتفاع موازی و مداری‌اند. در ماه‌های گرم سال ارتفاع تروپوپاز در جنوب شرق کاهش می‌یابد و بالاترین ارتفاع تروپوپاز در مرکز کشور رخ می‌دهد.
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Analysis of monthly changes inTropopause height layer on Iran
چکیده انگلیسی مقاله Introduction Tropopause transitional layer of the troposphere is to stratosphere. This layer determines the upper limit of the troposphere and somehow expresses the spatial and temporal variations in the thickness of the layers and the layer crystallization thermodynamic changes. Short and long-term atmospheric layer that all phenomena occur in it. In other words, this layer determines the thickness of the ceiling (upper limit) layer is the troposphere. Iran in terms of Geographical location is on the north side of the trading range Hadley cells in the general circulation of the atmosphere. That’s why when handling the extremely cells have modified the climate of this country. That's why the country is in the range of atmospheric systems important effects such as (anticyclone Saudi Arabia, the Siberian anticyclone, the anticyclone of the Azores, Mediterranean cyclones are low pressure Sudan. The land is adjacent to the vast deserts of the Arabian Peninsula and the vast deserts of Siberia is located. Two great ranges of Zagros and Alborz in the country's northern and western bar and the Dasht-e Kavir and Dasht-e Lut in Central and South East is also remarkably effective at the entry and transit systems and mechanisms. The sum of these factors makes the country highly subject to changes in time and space troposphere and the tropopause crystallized in the works. According to the tropopause layer height changes in response to seasonal or yearly changes that are occurring in the lower layer of the atmosphere. At the same time the top layer by layer to the stratosphere as well. If these changes can be estimated that the annual seasonal trends or changes in the troposphere layer has been and can be changed and the results of its possible to estimate and predict. For this purpose maps of the height of the tropopause layer altitude on the slope of Iran in the period 2015-2003 is examined in each of the months of the year. Materials and method In this study, data from the Atmospheric Infrared depth (ATMOSPHERIC INFRARED SOUNDER) Moderate-resolution imaging spectroradiometer(MODIS), Aqua, Earth Observing System (EOS) the product(AIRS+AMSU) V006 (AIRX3STD) at GES DISC used. This product series of MODIS data in the form of geophysical parameters in the network have been distributed, 1 × 1 ° arc. The data from -180 to 180 longitude and latitude -90 and 90 are available from bases http://modaps.nascom.nasa.gov are available. After loading the images from 2003 to 2015, data compiled MATLAB software, and using the World Meteorological Organization Tropopause height values for the matrix of size 12 × 155 was calculated for each year (155 networks were introduced and 12 months of the year are inscribed on the Iranian border). The results of image processing software environment was ArcGis10.2 and maps of each month using the least amount of errors were prepared by Kryjng. The next step is to draw longitudinal profile of the height of the tropopause in 3D Analyst software plugin named slice of the North West (to a maximum height of the tropopause) to the South East of the country (as a minimum altitude of the tropopause) drawn and corresponding graphs for each of the months of the year were drawn. Results and discussion The results showed that the tropopause height is matched to the south and north of the country in January. In February, the maximum difference in height between the southern and northern happened. In almost every area of the country and oriented parallel curves are the same height and the slope is not too unlike the last month in the West and South West. Changes in the year troposphere height in the range of Iran's normal response to many comments by atmospheric circulation. For example troposphere low in cold season can be caused by Eddies smaller and thinner linked cells Ferrell. The spring equinox in the country's highest tropopause height that generally belongs to the South East is about 16475 meters and the lowest elevation in North West Iran, striking a height of 11008 meters decreased So great altitudinal gradient between the south and north of the country there is this difference, amounting to 5700 meters, which is as thick as the middle troposphere. Conclusion The height of the tropopause layer Iran has seasonal fluctuations, yet the intensity of the incoming topography and activity of the system. But the impact of the tropopause height changes more pronounced in the input system from the effects of topography. Although in July reaches its peak height of the tropopause. But fluctuations in tropopause height between the south and north of the country is minimal. In the other months of the year maximum height of the tropopause in the south and north of the country is minimal. While the height of the tropopause in the month of August in the center of the country. In the other months of the year maximum height of the tropopause in the South East are the lowest in the North West. During the cold period in the northern slope of the layer to its minimum. And vice versa during the warm southern slope of the tropopause layer is minimized. This phenomenon has spread south polar vortex in the Siberian high pressure and cold period of year as well as the expansion of the subtropical high pressure north of Saudi Arabia during periods of warm harmonious. The study also showed that during the months of monsoon activity in the South East of extremely reduced height of the tropopause layer.
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله حسن لشکری |
دانشیار جغرافیای طبیعی، دانشگاه شهید بهشتی، دانشکده علوم زمین
سازمان اصلی تایید شده: دانشگاه شهید بهشتی (Shahid beheshti university)

عباس علی داداشی رودباری | abbas ali dadashi roudbari
دانشجوی دکتری آب وهواشناسی شهری، دانشگاه شهید بهشتی، دانشکده علوم زمین
سازمان اصلی تایید شده: دانشگاه شهید بهشتی (Shahid beheshti university)

زینب محمدی |
دانشجوی دکتری آب و هواشناسی سینوپتیک، دانشگاه شهید بهشتی، دانشکده علوم زمین
سازمان اصلی تایید شده: دانشگاه شهید بهشتی (Shahid beheshti university)

نشانی اینترنتی http://jphgr.ut.ac.ir/article_61583_875b36b91f71aefd31b0c94974d4dafd.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/1375/article-1375-398992.pdf
کد مقاله (doi)
زبان مقاله منتشر شده fa
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات