11/28/2023 0 Comments Snow totals nj 2012![]() Patagonian glaciers show a strong sensitivity to climate variations and recent evidence shows that most of these glaciers are receding rapidly ( Davies and Glasser, 2012 White and Copland, 2015 Meier et al., 2018). Patagonia is the largest glaciated area in the Southern Hemisphere outside Antarctica. This suggests that increases in snow accumulation are attenuating the response of some Patagonian glaciers to warming in a regional context of overall glacier retreat. In addition, glaciers with positive and stable elevation and frontal changes determined by previous works are related to areas where snow accumulation has increased during the period 2000–2015. Overall, for the rest of the area and during other seasons, no significant changes can be determined. Significant positive trends are mainly present in the autumn season on the west side of the SPI, while on the east side, significant negative trends in autumn were observed. Good agreement is found in comparing UDG observations with modeled data on the plateau area of the SPI during a short time period however, there are important differences between rates of snow accumulation determined in this work and previous estimations using ice core data at annual scale. These differences could lead to divergent mass balance estimations depending on the scheme used to define the snow accumulation. The values depend on the PPM used and reach a mean difference of 1,500 mm w.e., with some areas reaching differences higher than 3,500 mm w.e. Snow accumulation shows that rates are higher on the west side relative to the east side for both icefields. We used a regional climate model, RegCM4.6 and four Phase Partitioning Methods (PPM) in addition to short-term snow accumulation observations using ultrasonic depth gauges (UDG). In this work, we have assessed spatial and temporal patterns in snow accumulation in both the North Patagonia Icefield (NPI) and South Patagonia Icefield (SPI). An issue of central concern is the accurate estimation of precipitation phase. This precludes a robust assessment of glacier response to current and projected climate change. Due to the lack of in situ long-term meteorological observations, the understanding of how glaciers are responding to changes in climate over this region is extremely limited, and uncertainties exist in the glacier surface mass balance model parameterizations. Recent evidence shows that most Patagonian glaciers are receding rapidly. 6Institut für Geographie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.5School of Earth and Environment, University of Leeds, Leeds, United Kingdom.4Instituto de Ciencias de la Tierra, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.3Department of Geophysics, Universidad de Chile, Santiago, Chile.2Center for Climate and Resilience Research, Universidad de Chile, Santiago, Chile.1School of Geography, University of Leeds, Leeds, United Kingdom.Ross 5 David Farías-Barahona 6 Maisa Rojas 2,3 Claudio Bravo 1 * Deniz Bozkurt 2,3 Álvaro Gonzalez-Reyes 4 Duncan J.
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