{"title":"“哨兵1号”雷达数据在阿纳德尔(楚科奇)和贝拉亚戈拉(雅库特)地区识别冻融土壤的分析","authors":"N. Rodionova, Н В Родионова","doi":"10.31857/S0205-96142019129-37","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":388889,"journal":{"name":"Исследования Земли из космоса","volume":"21 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Analysis of Sentinel 1 Radar Data to Identify Frozing/Thawing Soils in the Area of Anadyr (Chukotka) and Belaya Gora (Yakutia)\",\"authors\":\"N. Rodionova, Н В Родионова\",\"doi\":\"10.31857/S0205-96142019129-37\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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.\",\"PeriodicalId\":388889,\"journal\":{\"name\":\"Исследования Земли из космоса\",\"volume\":\"21 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-03-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Исследования Земли из космоса\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.31857/S0205-96142019129-37\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Исследования Земли из космоса","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31857/S0205-96142019129-37","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Analysis of Sentinel 1 Radar Data to Identify Frozing/Thawing Soils in the Area of Anadyr (Chukotka) and Belaya Gora (Yakutia)
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.
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