2021/01/02 by Gabriela Mena, Kenji Yoshikawa, Norbert Schörghofer +8 · 17 citations
Earth and Planetary Sciences · #Climate change and permafrost #Cryospheric studies and observations #Geology and Paleoclimatology Research #Permafrost #Borehole #Snow #Volcano #Geology #Geothermal gradient #Active layer #Arid #Snow cover #Atmospheric sciences #Altitude (triangle) #Plateau (mathematics) #Geomorphology #Physical geography #Hydrology (agriculture) #Environmental science #Layer (electronics) #Geochemistry #Geotechnical engineering #Geography #Oceanography
paper · pdf · doi:10.1080/15230430.2021.1878739
published in Arctic Antarctic and Alpine Research 53(1), 60-66 (Institute of Arctic and Alpine Research)
openalex publication_date 2021/01/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/27
Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and located in the hydrothermal alteration zone. The freeze–thaw layer and upper part of the permafrost layer temperatures were measured at 0 to 39 cm depth at 1-cm resolution throughout the year. The upper 3 cm of the ground experienced more than 100 freeze–thaw cycles in 2019. The maximum thaw depth was 14 cm. No significant thermal offset is observed between the annual mean of the surface temperature and the top permafrost boundary. The 14-m borehole reveals that the geothermal gradient was quite high at 200°C/km. In 2019 the seventy days of snow cover impacted the surface energy budget. Winter and summer snow conditions contribute to cooling the surface temperature regime in different ways.