## 6 Conclusions  
This study presents a complete remote sensing and topographic dataset to generate a comprehensive compilation of ice-elevation and area changes from 1955 to 2015 of the Echaurren Norte Glacier. The cumulative mass balance of the glacier for the whole period was \(-\)40.64 \(\pm\) 5.19 m w.e, whereas the total volume lost amounted to 0.022 \(\pm\) 0.003 km\({}^{3}\) with a reduction of 65% of the original glacier extent from 1955. Despite slight positive mass balances in 2000-2009, a clear negative long-term trend can be observed. This is consistent with the retreating and thinning trends of glaciers in this region. The glacier mass balance of the Echaurren Norte Glacier is mainly affected by ENSO variability, showing that the precipitation variability is the main mass-balance driver of the Echaurren Norte Glacier; it seems that temperature is playing a secondary role. However, changes in precipitation patterns (triggered in extreme dry years between 2010 and 2015) between 2009 and 2015 showed that ENSO-neutral periods can also be associated with strong glacier downwasting. If the current mass balance trend continues, we expect that the Echaurren Norte Glacier will disappear in the near future, following the fate of other small Andean glaciers such as Chacaltaya in Bolivia. Our results are in line with the observed mass loss since 1975 at Echaurren Norte Glacier by glaciological mass balance measurements. However, a reanalysis of glacier mass balance is recommended to homogenize the glaciological mass balance method. We provide geodetic mass balance data for a long period of time (60 years) of a small glacier in the Central Andes where, until now, only fragmented studies (temporally and spatially) existed. Future works can unravel the mass-balance of other glaciers in the region considering the cryosphere importance as freshwater resource. Since our results show a daunting fate for the Echaurren Norte Glacier, we want to stress the need for monitoring of other glaciers in the Central Andes of Chile in order to compensate for the potential end of the Echaurren Norte Glacier time series. We want to emphasize the importance of such continuous glacier mass balance data from the region. Our multi-sensor analysis reveals that sources from historical cartography to modern techniques as LiDAR and InSAR data, combined with a precise post-processing provide reliable datasets to quantify glacier changes over extended periods of time, where in-situ measurements are poor or do not exist. The following are available online at [[http://www.mdpi.com/2072-4292/11/3/260/s1](http://www.mdpi.com/2072-4292/11/3/260/s1)]([http://www.mdpi.com/2072-4292/11/3/260/s1](http://www.mdpi.com/2072-4292/11/3/260/s1)). Figure S1: (a) Photographs from the new small lake in center of the Echaurren Norte Glacier, March 2015 (photo by [PERSON]). (a) Bedrock visible, (b,d) debris cover over the glacier surface, (c) water. Figure S2: Hypsometric plot of the observed SRTM-C and X band penetration difference, average in 100m glacier elevation bins. Black box indicates the elevation range of Echaurren Norte Glacier. Since the Echaurren Norte Glacier was not covered by the X band, we analyzed 20 glaciers located in the same Maipo basin. Figure S3: (a) Annual temperature anomalies at El Yeso weather station and (b) and Quinta Normal station between 1955 and 2015. Significant warming trends were observed in autumn (maximum, minimum and mean values). (c) Annual precipitation at the El Yeso weather station between 1962 and 2015. Since 2010, an uninterrupted drought in Central Andes can be observed. Quality control and procedures of climatic dataset in [PERSON] et al. [66]. Figure S4: (a-d) Mean temperature anomalies per season between 1962 and 2015 in the El Yeso weather station and Quinta Normal (valley) station. Quality control and procedures of climatic dataset in [PERSON] et al. [66]. Figure S5: Correlation analysis between accumulation of Echaurren Norte Glacier and temperature anomalies in (a) winter and (b) autumn.