Academic Journal
Идентификация мезомасштабной конвекции и гроз по данным modis и аэрологического зондирования
| Τίτλος: | Идентификация мезомасштабной конвекции и гроз по данным modis и аэрологического зондирования |
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| Πηγή: | Вестник Томского государственного университета. |
| Στοιχεία εκδότη: | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «Национальный исследовательский Томский государственный университет», 2012. |
| Έτος έκδοσης: | 2012 |
| Θεματικοί όροι: | 13. Climate action, ГРОЗА, НЕУСТОЙЧИВОСТЬ АТМОСФЕРЫ, СПЕКТРОРАДИОМЕТР MODIS |
| Περιγραφή: | The production potential of MODIS (Moderate Resolution Imaging Spectro-radiometer) for definition of the degree of instability of the atmosphere is investigated. Spectroradiometer MODIS is installed on the space platform Terra for studying the atmosphere of the Earth and its surface on 36 channels. Numerous parameters have been developed to measure convective instability, which are defined according to aerologic sounding. The more common ones include the Lifted Index (LIFT) and two indexes (TOTL and K Index) containing static stability and dew point at levels of 850 hPa and 700 hPa. Indexes are calculated on the basis of the data of aerologic sounding of the atmosphere. The MODIS Atmospheric Profile product (MOD07) consists of several parameters including atmospheric stability, temperature and moisture profiles, and atmospheric water vapor. All of these parameters are produced for 20 levels at 5 x 5 km pixel resolution including indexes Lifted Index, TOTL and K Index. As the characteristic of instability three indexes computed on radiosonde and satellite data are compared: Lifted Index, TOTL and K Index. Characteristics of the atmosphere for days with thunderstorms at a Western Siberia station for the period of 2009-2011 were investigated. The total of 76 days with thunderstorm during the researched period have been considered. The statistical calculations and figures showing comparison between indexes derived from the atmospheric sounding and satellite data are presented. Two of the satellite derived instability indexes (Lifted Index, TOTL) are well correlated with those derived from radiosondes. Figures showing spatial distribution of indexes during a thunder-storm at one of the meteorological stations are given. Taking into account the fact that spatial resolution MYD07_L2 is 5 х 5 km, the probability of thunderstorm activity, which is directly connected with atmospheric instability, can be defined for each cell of the grid. MODIS allows determining spatial position of powerful convective cells and improving the forecast of thunderstorms. The researches play an important role as they have a high potential for increase in spatial accuracy of thunder-storms forecasting. Исследуется потенциал продукции MODIS для определения степени неустойчивости атмосферы. В качестве характеристик неустойчивости сравниваются три индекса, рассчитываемых по данным спутника и радиозондов: LIFT, TOTL и KIND. Получено, что хорошо коррелируют два индекса, определяемых по данным спутника и радиозондов: LIFT и TOTL. MODIS позволяет определять пространственное положение мощных конвективных ячеек и уточнять прогноз гроз. |
| Τύπος εγγράφου: | Article |
| Περιγραφή αρχείου: | text/html |
| Γλώσσα: | Russian |
| ISSN: | 1561-803X 1561-7793 |
| Σύνδεσμος πρόσβασης: | http://cyberleninka.ru/article_covers/14012037.png http://cyberleninka.ru/article/n/identifikatsiya-mezomasshtabnoy-konvektsii-i-groz-po-dannym-modis-i-aerologicheskogo-zondirovaniya |
| Αριθμός Καταχώρησης: | edsair.od......2806..8bb3367ed728fa90a2a907ccd7d8e7f5 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 1561803X 15617793 |
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