Evaluation of the Lake Titicaca's surface water temperature using LST MODIS time series (2000–2020). (December 2021)

• Record Type: Journal Article
• Authors: Aguilar-Lome, Jaime; Soca-Flores, Renato; Gómez, Diego
• Is Part Of: Journal of South American earth sciences. Volume 112:Part 1(2021)
• Publication Date: 2021-12
• Subjects: Lake Titicaca -- Water surface temperature (LWST) -- MODIS; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2021.103609
• Languages: English
• ISSNs: 0895-9811

Abstract

Abstract: In this study, the LST MODIS product (v006, level 3) which provides the daytime and nighttime land surface temperature was used to evaluate the space-temporal variation of the water surface temperature (LWST) of Lake Titicaca, during the period 2000–2020. The Mann-Kendall tests and the Sen's method were applied to determine the statistical significance and the rates of change of the maximum air and water temperatures. The results show that the average annual LWST cycles of Lake Titicaca fluctuate between 12.3°C (August) and 13.8°C (April) in region A (Major Lake), and between 10.6°C (July) and 14.8°C (November) in region B (Minor Lake). In addition, there is a general increasing trend of the average LWST during the coldest time (winter) of the year, with more intense warming effects in some shallow areas and in coastal areas. In Major Lake, the significant increasing trend of daytime and nighttime LWST was maintained at a rate of 0.30 [0.14, 0.40]°C/decade and 0.34 [0.18, 0.45]°C/decade respectively. Also, the maximum local air temperature trend during the austral winter (JJA) shows a significant increasing trend of 0.52 [0.16, 0.87]°C/decade between 1983 and 2013. This fact could be responsible for the change in trend in the surface temperature of Lake Titicaca. Highlights: Daytime and nighttime MODIS LST data over Lake Titicaca were obtained from 2000 to 2020. Season (winter) trends of daytime and nighttime LST were computed using Sen's method. Lake Titicaca temperature show a warming based on daytime and nighttime MODIS LST measurements.