Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 191 - Open Research Data - Bridge of Knowledge

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Sea surface temperature in the Baltic Sea derived from Landsat 8 satellite data - path 191

Description

The data set contains high resolution sea surface temperature (SST) maps estimated from Landsat 8 Level 1 Thermal Infrared Sensor (TIRS) data using NLSST algorithm.  SST was calculated only for granules (185 x 180 km) from satellite path number 191, that covered at least 2000 km2 of the cloud-free area of the Baltic Sea.

The Landsat mission is run by the Earth Observation Program of the National Aeronautics and Space Administration (NASA). Launched in 2013, Landsat 8 carries two instruments: a Thermal Infrared Sensor (TIRS) collecting infrared data of 100-m resolution and an Operational Land Imager (OLI) which collects data of 30-m resolution in the visible (VIS), near-infrared (NIR) and short-wave infrared (SWIR) portions of the spectrum. Data from both instruments are provided by the USGS in a common grid in UTM projection with a resolution of 30 m. Each satellite path is revisited every 16 days. Of the path 191, nine granules cover the Baltic Sea area (Figure 1).

The NLSST algorithm is an empirical formula utilising split-window approach to atmospheric correction (Walton et al. 1998). To calculate SST, Level 1 satellite data form the Collection 2 (USGS/NASA Landsat Program) and NLSST coefficients derived for the Baltic Sea in reference to in situ bulk temperatures from buoys and platforms were used (Bradtke 2021). Clouded areas were masked (fill value -999). The validation of the results for the period 2013-2019 showed a root mean square error (RMSE) 0.65 °C and bias 0.02 °C.

The SST maps are provided in GeoTIFF format using the naming convention: LC08_SST_YYYYMMDD_HHmmSS_PPPRRR_UTMZZZ
where:

  • YYYYMMDD – date of granule data acquisition: year, month, day
  • HHmmSS – granule center time (UTC): hour, minutes, seconds
  • PPPRRR – WRS path and row
  • ZZZ – UTM zone

 

Illustration of the publication

Figure 1. Granules of the Landsat 8 path number 191, which cover the Baltic Sea area. Numbers identify row of the path.

Dataset file

SST_path_191.zip
46.6 GB, S3 ETag 2dfa5f5ec59f93b94e234de8af7c62bc-94, downloads: 69
The file hash is calculated from the formula
hexmd5(md5(part1)+md5(part2)+...)-{parts_count} where a single part of the file is 512 MB in size.

Example script for calculation:
https://github.com/antespi/s3md5
download file SST_path_191.zip

File details

License:
Creative Commons: by 4.0 open in new tab
CC BY
Attribution

Details

Year of publication:
2021
Verification date:
2021-11-24
Dataset language:
English
Fields of science:
  • Earth and related environmental sciences (Natural sciences)
DOI:
DOI ID 10.34808/rfab-4965 open in new tab
Series:
Verified by:
Gdańsk University of Technology

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