Earth Research from SpaceEarth Research from SpaceИсследование Земли из космоса0205-96143034-5405The Russian Academy of Sciences1144610.31857/S0205-96142019129-37ИСПОЛЬЗОВАНИЕ КОСМИЧЕСКОЙ ИНФОРМАЦИИ О ЗЕМЛЕResearch ArticleAnalysis of Sentinel 1 Radar Data to Identify Frozing/Thawing Soils in the Area of Anadyr (Chukotka) and Belaya Gora (Yakutia)Анализ радарных данных Sentinel 1 для идентификации талых и мерзлых почв в районе Анадыря (Чукотка) и Белой Горы (Якутия)RodionovaN. V.РодионоваН. В.
Russian Federation
rnv@ire.rssi.ruKotelnikov Institute of Radio Engineering and Electronics of RASФедеральное государственное бюджетное учреждение науки Институт радиотехники и электроники имени В.А. Котельникова Российской академии наук240320191293724032019Copyright ©; 2019,Copyright ©; 2019, Российская академия наук2019Российская академия наукhttps://journals.eco-vector.com/0205-9614/article/view/11446

The paper deals with the distinction between thawed and frozen soils in the upper 5 cm layer for two stations in Russia: Belaya Gora (Yakutia) 68.5° N and Anadyr (Chukotka) 64.78° N — by using Sentinel 1 C-band radar data for the period of 2014–2016 years. Determination of the frozen/thawed soil state is carried out in three ways: 1) by multi-temporal radar data on the basis of a significant in 3–5 dB difference in the backscatter coefficient σ0 in the transition of freezing/thawing soil state, 2) by finding the threshold value of σ0 at which the temperature in the upper soil layer falls below 00С, 3) by texture features for one- channel images. The graphs of the AFI (air freezing index) for the period of 2012-2018 with trends are constructed based on the archive data of air temperature for the study areas.

В работе представлен анализ сезонных зависимостей яркостной температуры различных областей Антарктиды по данным радиометров MIRAS (спутник SMOS) и SSMIS (спутники серии DMSP). В качестве региона исследования выбрана Земля Королевы Мод, включающая в себя основные зоны Антарктиды: купол, зону стоковых ветров и прибрежную зону. Рассмотрена взаимосвязь временной динамики яркостной температуры от изменения климатических характеристик регионов. Выявлены основные факторы, влияющие на изменение яркостной температуры в разных областях ледникового щита Антарктиды

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