Artículos de revistasArtículos de revistashttps://repositorio.uchile.cl/handle/2250/1176652024-03-28T14:57:04Z2024-03-28T14:57:04ZAnthropogenic influence on surface changes at the Olivares glaciers; Central ChileBarandun, MartinaBravo, ClaudioGrobety, BernardJenk, TheoFang, LingNaegeli, KathrinRivera Ibáñez, Sergio AndrésCisternas, SebastiánMünster, TatjanaSchwikowski, Margithttps://repositorio.uchile.cl/handle/2250/1958752023-11-12T21:11:10Z2022-01-01T00:00:00ZAnthropogenic influence on surface changes at the Olivares glaciers; Central Chile
Barandun, Martina; Bravo, Claudio; Grobety, Bernard; Jenk, Theo; Fang, Ling; Naegeli, Kathrin; Rivera Ibáñez, Sergio Andrés; Cisternas, Sebastián; Münster, Tatjana; Schwikowski, Margit
We have investigated the source and role of light-absorbing impurities (LAIs) deposited on the glaciers of the Olivares catchment, in Central Chile. LAIs can considerably darken (lowered albedo) the glacier surface, enhancing their melt. We combined chemical and mineralogical laboratory analyses of surface and ice core samples with field-based spectral reflectance measurements to investigate the nature and properties of such LAIs. Using remote sensing-based albedo maps, we upscaled local information to glacier-wide coverage. We then used a model to evaluate the sensitivity of sur -face mass balance to a change in ice and snow albedo. The across-scale surface observations in combination with ice core analysis revealed a history of over half a century of LAIs deposition. We found traces of mining residuals in glacier surface samples. The glaciers with highest mass loss in the catchment present enhanced concentrations of surface dust particles with low reflectance properties. Our results indicate that dust particles with strong light-absorbing capacity have been mobilized from mine tailings and deposited on the nearby glacier surfaces. Large-scale assessment from satellite-based observations revealed darkening (ice albedo lowering) at most investigated glacier tongues from 1989 to 2018. Glacier melt is sensitive to ice albedo. We believe that an accelerated winter and spring snow albedo decrease, partially triggered by surface impurities, might be responsible for the above-average mass loss encountered in this catchment.
2022-01-01T00:00:00ZAdvancing recognition justice in telecoupled critical mineral supply chains: the promise of social mediaAgusdinata, Datu BuyungEakin, HallieDarnall, NicoleJiang, BohanRomero Aravena, Hugohttps://repositorio.uchile.cl/handle/2250/1955512023-09-04T20:37:08Z2023-01-01T00:00:00ZAdvancing recognition justice in telecoupled critical mineral supply chains: the promise of social media
Agusdinata, Datu Buyung; Eakin, Hallie; Darnall, Nicole; Jiang, Bohan; Romero Aravena, Hugo
Electric vehicles and other low-carbon technologies are increasingly scrutinized for the injustices they impose on critical-mineral mining communities. Injustices arise because local communities that are disproportionately affected by mining are materially and cognitively distant to those who hold influence over supply chain practices, policies, and institutions. The outcome is that these communities lack recognition by producers and consumers who benefit from critical mineral extractions. We focus on the promise of social media as a means to assist distant local communities gain recognition as important stakeholders and as a vehicle for informing mineral-consuming public. Using a case study of the impacts of lithium extraction in Chile, we analyze social media (Twitter) to establish evidence of the telecoupled information flows for communicating the nature of impacts of lithium extraction and the potential for advancing recognition justice. Our findings offer initial evidence of the potential role of social media as a mechanism to: (1) improve the flow of information and knowledge from mineral mining sites into social networks, (2) give voice to local stakeholders who otherwise are not heard, (3) enhance recognition justice for these distal communities.
2023-01-01T00:00:00ZLabores de cuidado y covid-19: cambios en la movilidad cotidiana de mujeres en Santiago, ChileZúñiga Olave, Catalina PazHerrmann Lunecke, Marie Geraldinehttps://repositorio.uchile.cl/handle/2250/1948982023-07-21T17:20:49Z2022-01-01T00:00:00ZLabores de cuidado y covid-19: cambios en la movilidad cotidiana de mujeres en Santiago, Chile
Zúñiga Olave, Catalina Paz; Herrmann Lunecke, Marie Geraldine
Since 2020, the world has been impacted by the Covid-19 pandemic, causing significant changes in cities, affecting the daily mobility of people, and exacerbating inequalities, particularly for women. Confinement has deepened gender inequality in different dimensions and contexts, whereby many women, as part of their reproductive roles, have assumed more care and domestic work in various spaces, especially at home and in their neighborhoods. This article analyzes the impact of the pandemic on the daily mobility of women linked to their care work in the San Cristobal neighborhood of Recoleta in Santiago, Chile. With this aim, online in-depth interviews and exploratory maps were conducted with women who perform care work, comparing their work and daily mobility before and during the pandemic. The results show that since the pandemic began, the gender inequality experienced by women has increased, as reflected in their daily activities, particularly in relation to the increase in domestic work and care work. Likewise, a change is observed in the daily mobility of women who perform care work, as they have focused more on walking and movement within their own neighborhoods to cover basic needs.; Desde el año 2020 el mundo vive en un contexto de pandemia debido a la covid-19, lo cual ha significado
cambios drásticos en las ciudades y en la movilidad cotidiana de las personas y ha agudizado las desigualdades,
en particular para las mujeres. El confinamiento profundizó la desigualdad de género en diferentes dimensiones
y contextos, pues muchas mujeres han debido asumir, como parte de su rol reproductivo, una carga mayor
de labores de cuidado y tareas domésticas en distintos entornos, sobre todo en el hogar y en el barrio. El
objetivo de este artículo es analizar el impacto de la pandemia en la movilidad cotidiana ligada a las labores
de cuidado de mujeres del barrio San Cristóbal en Recoleta, Santiago, Chile. Con este fin se realizaron mapas
exploratorios virtuales y entrevistas semiestructuradas a mujeres que realizan labores de cuidado, comparando
dichas labores y la movilidad cotidiana antes y durante la pandemia. Los resultados muestran que desde el
confinamiento pandémico se ha acrecentado la desigualdad de género que viven las mujeres, reflejada en sus
actividades cotidianas, particularmente en relación con el aumento del trabajo doméstico y las labores de
cuidado. Asimismo, se observa un cambio en la movilidad cotidiana de las mujeres cuidadoras, centrada más en
la caminata y ubicada en el entorno barrial a fin de cubrir sus necesidades básicas.
2022-01-01T00:00:00ZEntre academia y territorio: programa Chiloé de la Universidad de Chile: construyendo sinergiasMawromatis Pazderka, ConstantinoHevia Riera, Carloshttps://repositorio.uchile.cl/handle/2250/1947312023-07-17T20:42:13Z2021-01-01T00:00:00ZEntre academia y territorio: programa Chiloé de la Universidad de Chile: construyendo sinergias
Mawromatis Pazderka, Constantino; Hevia Riera, Carlos
2021-01-01T00:00:00Z