Thermal Regime of Snow Cover in Winter in The High-Mountainous Part of Elbrus According To Observational Data and Modeling Results

E. D. Drozdov; Дроздов Е. Д.; D. V. Turkov; Турков Д. В.; P. A. Toropov; Торопов П. А.; A. Yu. Artamonov; Артамонов А. Ю.

Термический режим снежного покрова зимой в высокогорной части Эльбруса по натурным данным и результатам моделирования

Авторы: Дроздов Е.Д.¹, Турков Д.В.², Торопов П.А.¹^,2, Артамонов А.Ю.³
Учреждения:
1. Московский государственный университет имени М.В. Ломоносова
2. Институт географии РАН
3. Институт физики атмосферы им. А.М. Обухова РАН
Выпуск: Том 63, № 2 (2023)
Страницы: 225-242
Раздел: Снежный покров и снежные лавины
URL: https://journals.eco-vector.com/2076-6734/article/view/659382
EDN: https://elibrary.ru/RUFSDM
ID: 659382

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Аннотация

На основе данных наблюдений на леднике Гарабаши на юго-восточном склоне Эльбруса в феврале 2021/22 г. проведена верификация LSM SPONSOR для условий периода аккумуляции. Показано, что при значении коэффициента серости 0.98 ошибка моделирования радиационной температуры снежной поверхности не превышает 1°С. Кроме того, модель адекватно воспроизводит термический режим глубоких слоев снежного покрова. Показано, что методическая проблема измерений термического режима в нарушенном снежном покрове может приводить к существенным ошибкам измерения температуры снега. Сравнение результатов моделирования с прямыми измерениями потоков явного тепла по методу eddy covariance показало их хорошее соответствие (коэффициент корреляции более 0.9), хотя для случаев температурной инверсии в приземном слое отмечается систематическое завышение моделью абсолютных значений потоков. На основе данных измерений выявлен факт достаточно высокой повторяемости высоких значений турбулентных потоков в условиях интенсивного радиационного прогрева в сочетании с высокими скоростями ветра, что по всей видимости оказывается типичным для высокогорных районов в зимнее время.

Ключевые слова

горное оледенение, данные наблюдений, численное моделирование, SPONSOR, Эльбрус, ледник Гарабаши

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