Published June 10, 2022 | Version v1
Dataset Open

Nearly three centuries of Lava Flow Subsidence at1 Timanfaya, Lanzarote

  • 1. COMET, School of Earth and Environment, University of Leeds
  • 2. Department of Life and Earth Sciences, Instituto de Productos Naturales y Agrobiologi
  • 3. Geography and Crustal Dynamics Research Center, Geospatial Information Authority of Japan

Description

The following datasets are available for each InSAR dataset - Envisat and Sentinel-1, covering the island of Lanzarote between 2004/01/17 -2010/01/30 and 2016/09/14-2020/06/25 respectively:


Line of Sight (LOS) velocities
LOS velocity standard deviations
LOS displacement time series
Vertical velocities
Vertical velocity standard deviations 
East-West velocities
East-West velocity standard deviations

The velocities and standard deviations are all geocoded (latitude/longitude in decimal degrees) geotiff files in mm/yr at 90 m resolution for Envisat and 30 m resolution for Sentinel-1. Negative values in the LOS data represent movement away from the satellite; in the vertical data represent subsidence; and in the East-West data represent westward movement. The velocities were calculated from the displacement time series as a least squares inversion and the standard deviations were calculated within LiCSBAS using a percentile bootstrap method. 

The Sentinel-1 time series is given as a 3D matrix (lon x lat x dates) within a .h5 file where each slice is the cumulative displacement (mm) in a lon lat grid format for each epoch date. The latitude and longitude are then given as separate vectors within the .h5 file.

The Envisat time series is given as a .dat file where the first two columns are longitude and latitude. The remaining columns are the cumulative displacement (mm) for each epoch date.

The epoch dates for both are given as separate text files and are given in the format YYYYMMDD.

Files

Envisat_Ascending_Vel.tif

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Additional details

Funding

UK Research and Innovation
Understanding the connectivity and migration of shallow magma NE/R015546/1