Multiple spells of heatwave affected South America in recent weeks in the middle of what is supposed to be its winter.
Soil Surface Temperature - Max [17 July - 7 August] - 2023 vs 1950-1980 mean - The maximum of the anomaly shows in the part of the Andes south of the Altiplano, between Chile and Argentina.
Temperatures Tuesday rose past 35 Celsius in numerous locations, including at elevations of 1000-1500m high in the Andes foothills and up to 38.9C in the Chilean Andine. This is between 10C and 20C above what is normal for this time of year in parts of Chile and Argentina. Some places beat the previous daily record by more than 5°C, sometimes reaching all-time maximums, even though it is winter.
Lack of orthorectification in L1 Sentinel-3 images also explains part of the difference in the snow index in central higher altitude areas.