Abstract
Using the example of the Moscow region, a detailed comparison of the thermal regime of a highly urbanized territory was carried out according to in-situ data and different-scale satellite images. For the summer season, fundamental differences in the characteristics of the spatial variability of LST and air temperature in the daytime are revealed. It is shown that the relationship between the fields of these quantities is practically absent, primarily for urbanized territories, for which the effect of the heat island in the LST field is pronounced, and is practically not expressed in the air temperature field. However, for the winter season, some cases were identified with a more pronounced relationship between these values. The results obtained are independently confirmed by the results of numerical experiments with the COSMO model and the TERRA_URB parameterization with a 1 km grid step. At the same time, the prospects of using high spatial resolution images for model verification are shown: they made it possible to draw conclusions about the choice of the optimal configuration of model settings. For both summer and winter seasons, a comparison was made of high spatial resolution satellite data from Landsat with low spatial resolution data from MODIS. It is shown that, in spite of the generally good agreement between the two types of data, in some cases there are significant discrepancies between them due to differences in the values of the emissivity used and other factors that require more detailed analysis in further studies.
Highlights
Obukhov Institute of Atmospheric Physics, 3 Pyzhyovskiy Pereulok, 119017 Moscow, Russia; Hydrometeorological Research Center of Russian Federation, 13/1, Bolshoy Predtechenskiy Pereulok, 123376 Moscow, Russia;
highly urbanized territory was carried out according to in-situ data
It is shown that the relationship between the fields
Summary
РЕЗУЛЬТАТЫ ИССЛЕДОВАНИЯ И ИХ ОБСУЖДЕНИЕ Для Московского региона путем сравнения значений LST, полученных по космическим данным высокого пространственного разрешения со снимков со спутников серии Landsat, космическим данным низкого пространственного разрешения съёмочной системы MODIS и данных метеорологических наблюдений в Москве и окрестностях, показаны выраженные различия между взаимосвязью LST и температурой воздуха в летний и зимний период. Во всех случаях LST по данным Landsat несколько завышена относительно данных MODIS (в среднем на 1 K), особенно для урбанизированных территорий Это же показали и результаты сравнения воспроизведенных моделью значений температуры поверхности со средними по ячейкам расчетной сетки значениями LST по данным Landsat, что иллюстрирует пример на рис.
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