Robust trends of landscape dynamics in the Arctic Lena Delta with temporally dense Landsat time-series stacks

Nitze, Ingmar; Grosse, Guido

The robust Theil-Sen regression algorithm was used to calculate trend parameters (slope, intercept, confidence intervals) on Landsat time-series stack in the north-east Siberian Lena Delta. The trend calculation was applied to different widely used multi-spectral indices (Landsat Tasseled Cap, NDVI, NDWI, NDMI), which serve as proxies for land surface conditions. Analysis was carried over the entire Landsat archive for the peak summer season (July, August) between years 1999 and 2014. Landsat data before 1999 are not available for the study site. A more detailed description of the processing steps is presented in the accompanied publication. The dataset contains 8 raster files in GeoTIFF format, projected in UTM zone 52N (EPSG:32652). There are three different data product types with following properties: 1. Raw Trends Raw trend components for each multi-spectral index with 4 bands. Band 1: slope (linear change) per decade; Band 2: Intercept (interpolated value on July 1st 2014); Band 3: lower confidence interval of slope (alpha=0.05); Band 4: upper confidence interval of slope (alpha=0.05). 2. Number of observations Raster file with the number of valid observations during the observation period. 3. Visual representation of Tasseled Cap slopes A mosaicked visual representation of the trend components of tasseled cap indices (as shown in the publication) is provided as a 3-Band GeoTIFF. Please disable any visual stretch within the used software for correct visualization.

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Nitze, Ingmar

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Zusätzliche Informationen

Feld Wert
Identifikator DOI:10.1594/PANGAEA.854640
Projekt(e) ERC PETA-CARB
Institut AWI Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research
Quelle https://doi.pangaea.de/10.1594/PANGAEA.854640
Publikationsdatum 2016-04-15T10:00:00Z
Version 1.0
Produkt Land Surface Change
Sensor(en) Landsat
Dateien
  1. 6 trend files with 4 bands each: Slope (SL), Intercept (IC), Upper and Lower Confidence Intervals (CIL, CIU)
  2. Number of Observations (NObs)
  3. Red-Green-Blue-Composite of Trends: Red - Trend of Tasseled Cap - Brightness, Green - Trend of Tasseled Cap Greenness, Blue - Trend of Tasseled Cap Wetness
Variablen [Einheiten]
  1. Trend of Tasseled Cap Brightness (TCBR): -1 to 1
  2. Trend of Tasseled Cap Greenness (TCGR): -1 to 1
  3. Trend of Tasseled Cap Wetness (TCWE): -1 to 1
  4. Trend of Normalized Difference Vegetation Index (NDVI): -1 to 1
  5. Trend of Normalized Difference Moisture Index (NDMI): -1 to 1
  6. Trend of Normalized Difference Water Index (NDWI): -1 to 1
  7. Number of Observations (NObs) [Count]
Region Lena Delta
Räumlicher Bezug EPSG:32652 WGS 84 / UTM zone 52N
Räumliche Auflösung 30 m
Räumliche Abdeckung Latitude 72.00 to 73.90, Longitude 122.60 to 129.50
Zeitliche Abdeckung 1999-07 to 2014-08
Zeitliche Auflösung
Format Geotiff
Is Supplement To

Nitze, I; Grosse, G (2016): Detection of landscape dynamics in the Arctic Lena Delta with temporally dense Landsat time-series stacks. Remote Sensing of Environment, 181, 27-41, https://doi.org/10.1016/j.rse.2016.03.038

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