Del 03 al 15 de enero 2018 (verano austral), se realizó el crucero de investigación ANTAR XXV, abarcando desde la isla Trinidad, por el estrecho de Bransfield, alrededor de la isla Elefante, hasta la bahía Almirantazgo. Se efectuaron 14.970 mediciones superficiales que comprendieron: la presión parcial de CO2 para determinar los flujos de CO2 en el estrecho de Bransfield y alrededor de la isla Elefante, así como temperatura, salinidad, oxígeno disuelto, clorofila-a; además, se determinaron las masas de aguas transicionales de Bellingshausen (TBW), Weddel (TWW) y del mar de Escocia. También, se identificó el frente de Bransfield, definido por la isoterma de 1 °C el cual se ubicó en la zona intermedia del estrecho, donde los valores del oxígeno disuelto superficial estuvieron entre 330 y 340 μmol kg-1 en la mayor parte del estrecho y valores entre 350 y 360 μmol kg-1 alrededo...

Del 03 al 15 de enero 2018 (verano austral), se realizó el crucero de investigación ANTAR XXV, abarcando desde la isla Trinidad, por el estrecho de Bransfield, alrededor de la isla Elefante, hasta la bahía Almirantazgo. Se efectuaron 14.970 mediciones superficiales que comprendieron: la presión parcial de CO2 para determinar los flujos de CO2 en el estrecho de Bransfield y alrededor de la isla Elefante, así como temperatura, salinidad, oxígeno disuelto, clorofila-a; además, se determinaron las masas de aguas transicionales de Bellingshausen (TBW), Weddel (TWW) y del mar de Escocia. También, se identificó el frente de Bransfield, definido por la isoterma de 1 °C el cual se ubicó en la zona intermedia del estrecho, donde los valores del oxígeno disuelto superficial estuvieron entre 330 y 340 µmol kg-1 en la mayor parte del estrecho y valores entre 350 y 360 µmol kg-1 alrededo...

This study focused on estimating precipitation for the Santa basin located north of the capital of Peru, assessing spatial patterns and temporal variation. Precipitation products were used at a daily temporal resolution obtained from remote sensing datasets, including CHIRPS, PERSIANN-CCS, GPM and PISCO, altitude and vegetation products as NDVI-BOKU and GDEM. Also ground-based precipitation data from weather stations were collected from 35 meteorological stations (2012 -2019)

Peruvian glaciers are important contributors to dry season runoff for agriculture and hydropower, but they are at risk of disappearing due to climate change. We applied a physically based, energy balance melt model at five on-glacier sites within the Peruvian Cordilleras Blanca and Vilcanota. Net shortwave radiation dominates the energy balance, and despite this flux being higher in the dry season, melt rates are lower due to losses from net longwave radiation and the latent heat flux. The sensible heat flux is a relatively small contributor to melt energy. At three of the sites the wet season snowpack was discontinuous, forming and melting within a daily to weekly timescale, and resulting in highly variable melt rates closely related to precipitation dynamics. Cold air temperatures due to a strong La Niña year at Shallap Glacier (Cordillera Blanca) resulted in a continuous wet season s...

Runoff from glacierised Andean river basins is essential for sustaining the livelihoods of millions of people. By running a highresolution climate model over the two most glacierised regions of Peru we unravel past climatic trends in precipitation and temperature. Future changes are determined from an ensemble of statistically downscaled global climate models. Projections under the high emissions scenario suggest substantial increases in temperature of 3.6 °C and 4.1 °C in the two regions, accompanied by a 12% precipitation increase by the late 21st century. Crucially, significant increases in precipitation extremes (around 75% for total precipitation on very wet days) occur together with an intensification of meteorological droughts caused by increased evapotranspiration. Despite higher precipitation, glacier mass losses are enhanced under both the highest emission and stabilization e...

Esta investigación se realizó en el marco de los proyectos Perú GROWS y PEGASUS

Peruvian glaciers are important contributors to dry season runoff for agriculture and hydropower, but they are at risk of disappearing due to climate warming. Their energy balance and ablation characteristics have previously been studied only for individual glaciers, with no comparisons between regions. We applied the physically-based, energy balance melt component of the model Tethys-Chloris at five on-glacier meteorological stations: three in the Cordillera Blanca near Huaraz (with glaciers above ~4300 m a.s.l.), and two in the Cordillera Vilcanota east of Cusco (with glaciers above ~ 4800 m). The climate of these regions is strongly seasonal, with an austral summer wet season and winter dry season. Our results revealed that at most sites the energy available for melt is greatest in the wet season. This is a consequence of the dry season energy losses from the latent heat flux and net ...