Detection and correlation analysis of seasonal vertical ground movement measured from SAR and drought conditions
| Autor: | F. Pirotti, F. E. Toffah |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLVIII-3-2024, Pp 413-420 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1682-1750 2194-9034 |
| DOI: | 10.5194/isprs-archives-XLVIII-3-2024-413-2024 |
| Popis: | In this work the relationship between climatic indices and seasonal vertical ground motion (SVGM) from earth observation data is investigated. The European Ground Motion Service (EGMS) vertical ground movement measurements provided from 2018 to 2022 are used together with temperature and precipitation data from MODIS and CHIRP datasets respectively. Precipitation and temperature are further processed to provide Drought Code (DC) maps calculated ad hoc for this study at 1 km spatial resolution and daily temporal resolution. Measurement Points (MP) from EGMS over Italy provide a value of ground vertical movement approximately every 6 days. Seasonality is analysed to assess correlation between SVGM and DC from Copernicus CEMS (DC1) and from MODIS+CHIRP (DC2) and from temperature using Spearman's rank correlation coefficient (ρ). Initial results over Italy show that DC2 is significantly better correlated to SVGM than DC1 and temperature, with a stronger median absolute value of ρ of 0.025 and 0.042 respectively for negative and positive correlation scenarios. A total of 1275 MPs have correlation coefficients between DC2 map and EGMS measurements above 0.8 (positive correlation) and 2594 ρ |
| Databáze: | Directory of Open Access Journals |
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