PMID- 32957667 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201029 IS - 1424-8220 (Electronic) IS - 1424-8220 (Linking) VI - 20 IP - 18 DP - 2020 Sep 17 TI - Exploratory Analysis of Urban Climate Using a Gap-Filled Landsat 8 Land Surface Temperature Data Set. LID - 10.3390/s20185336 [doi] LID - 5336 AB - The Landsat 8 satellites have retrieved land surface temperature (LST) resampled at a 30-m spatial resolution since 2013, but the urban climate studies frequently use a limited number of images due to the problems related to missing data over the city of interest. This paper endorses a procedure for building a long-term gap-free LST data set in an urban area using the high-resolution Landsat 8 imagery. The study is applied on 94 images available through 2013-2018 over Bucharest (Romania). The raw images containing between 1.1% and 58.4% missing LST data were filled in using the Data INterpolating Empirical Orthogonal Functions (DINEOF) algorithm implemented in the sinkr R packages. The resulting high-spatial-resolution gap-filled land surface temperature data set was used to explore the LST climatology over Bucharest (Romania) an urban area, at a monthly, seasonal, and annual scale. The performance of the gap-filling method was checked using a cross-validation procedure, and the results pledge for the development of an LST-based urban climatology. FAU - Cheval, Sorin AU - Cheval S AUID- ORCID: 0000-0001-6412-1918 AD - Meteo Romania (National Meteorological Administration), 013686 Bucharest, Romania. AD - Henri Coanda Air Force Academy, 500187 Brasov, Romania. AD - Research Institute of the University of Bucharest, 050663 Bucharest, Romania. AD - Romanian Association of Applied Meteorology and Education, 010041 Bucharest, Romania. FAU - Dumitrescu, Alexandru AU - Dumitrescu A AUID- ORCID: 0000-0002-3361-483X AD - Meteo Romania (National Meteorological Administration), 013686 Bucharest, Romania. AD - Research Institute of the University of Bucharest, 050663 Bucharest, Romania. AD - Romanian Association of Applied Meteorology and Education, 010041 Bucharest, Romania. FAU - Amihaesei, Vlad-Alexandru AU - Amihaesei VA AUID- ORCID: 0000-0001-6681-1330 AD - Meteo Romania (National Meteorological Administration), 013686 Bucharest, Romania. AD - GeoScience Doctoral School Department, "Alexandru Ioan Cuza" University, 700506 Iasi, Romania. LA - eng GR - PN-III-P1-1.1-PD-2016-1579/Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii/ PT - Journal Article DEP - 20200917 PL - Switzerland TA - Sensors (Basel) JT - Sensors (Basel, Switzerland) JID - 101204366 SB - IM PMC - PMC7570728 OTO - NOTNLM OT - Bucharest OT - Landsat 8 OT - dineof OT - filling missing data OT - land surface temperature OT - urban climate COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. EDAT- 2020/09/23 06:00 MHDA- 2020/09/23 06:01 PMCR- 2020/09/01 CRDT- 2020/09/22 01:03 PHST- 2020/08/06 00:00 [received] PHST- 2020/09/15 00:00 [revised] PHST- 2020/09/15 00:00 [accepted] PHST- 2020/09/22 01:03 [entrez] PHST- 2020/09/23 06:00 [pubmed] PHST- 2020/09/23 06:01 [medline] PHST- 2020/09/01 00:00 [pmc-release] AID - s20185336 [pii] AID - sensors-20-05336 [pii] AID - 10.3390/s20185336 [doi] PST - epublish SO - Sensors (Basel). 2020 Sep 17;20(18):5336. doi: 10.3390/s20185336.