{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T17:55:29Z","timestamp":1772906129934,"version":"3.50.1"},"reference-count":86,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2021,9,1]],"date-time":"2021-09-01T00:00:00Z","timestamp":1630454400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Land Surface Temperature (LST) is an important parameter for tracing the impact of changing climatic conditions on our environment. Describing the interface between long- and shortwave radiation fluxes, as well as between turbulent heat fluxes and the ground heat flux, LST plays a crucial role in the global heat balance. Satellite-derived LST is an indispensable tool for monitoring these changes consistently over large areas and for long time periods. Data from the AVHRR (Advanced Very High-Resolution Radiometer) sensors have been available since the early 1980s. In the TIMELINE project, LST is derived for the entire operating period of AVHRR sensors over Europe at a 1 km spatial resolution. In this study, we present the validation results for the TIMELINE AVHRR daytime LST. The validation approach consists of an assessment of the temporal consistency of the AVHRR LST time series, an inter-comparison between AVHRR LST and in situ LST, and a comparison of the AVHRR LST product with concurrent MODIS (Moderate Resolution Imaging Spectroradiometer) LST. The results indicate the successful derivation of stable LST time series from multi-decadal AVHRR data. The validation results were investigated regarding different LST, TCWV and VA, as well as land cover classes. The comparisons between the TIMELINE LST product and the reference datasets show seasonal and land cover-related patterns. The LST level was found to be the most determinative factor of the error. On average, an absolute deviation of the AVHRR LST by 1.83 K from in situ LST, as well as a difference of 2.34 K from the MODIS product, was observed.<\/jats:p>","DOI":"10.3390\/rs13173473","type":"journal-article","created":{"date-parts":[[2021,9,2]],"date-time":"2021-09-02T23:05:12Z","timestamp":1630623912000},"page":"3473","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Validation of AVHRR Land Surface Temperature with MODIS and In Situ LST\u2014A TIMELINE Thematic Processor"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4277-9089","authenticated-orcid":false,"given":"Philipp","family":"Reiners","sequence":"first","affiliation":[{"name":"German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), 82234 Wessling, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7302-6813","authenticated-orcid":false,"given":"Sarah","family":"Asam","sequence":"additional","affiliation":[{"name":"German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), 82234 Wessling, Germany"}]},{"given":"Corinne","family":"Frey","sequence":"additional","affiliation":[{"name":"Rosenthaler + Partner AG, 4132 Muttenz, Switzerland"}]},{"given":"Stefanie","family":"Holzwarth","sequence":"additional","affiliation":[{"name":"German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), 82234 Wessling, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8381-7662","authenticated-orcid":false,"given":"Martin","family":"Bachmann","sequence":"additional","affiliation":[{"name":"German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), 82234 Wessling, Germany"}]},{"given":"Jose","family":"Sobrino","sequence":"additional","affiliation":[{"name":"Department of Earth Physics Thermodynamics, University of Valencia, 46100 Burjassot, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5836-5430","authenticated-orcid":false,"given":"Frank-M.","family":"G\u00f6ttsche","sequence":"additional","affiliation":[{"name":"Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research\u2014Atmospheric Trace Gases and Remote Sensing, 76021 Karlsruhe, Germany"}]},{"given":"J\u00f6rg","family":"Bendix","sequence":"additional","affiliation":[{"name":"Laboratory for Climatology and Remote Sensing, Faculty of Geography, University of Marburg, 35032 Marburg, Germany"}]},{"given":"Claudia","family":"Kuenzer","sequence":"additional","affiliation":[{"name":"German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), 82234 Wessling, Germany"},{"name":"Remote Sensing, Institute of Geography and Geology, University of Wuerzburg, 97074 W\u00fcrzburg, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,1]]},"reference":[{"key":"ref_1","unstructured":"World Meteorological Organization (2021, April 07). 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