Auroras
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights (aurora polaris), northern lights (aurora borealis), or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras are the result of disturbances in the magnetosphere caused by solar wind. These disturbances are sometimes strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere). The resulting ionization and excitation of atmospheric constituents emit light of varying color …
WikipediaPublications
NBER: National Bureau of Economic Research · 18 January 2024 English
This paper integrates daytime and nighttime satellite imagery into a spatial general-equilibrium model to evaluate the returns to investments in new motorways. Our approach has particular value in developing-country settings …
differ- ent sources on Earth, such as city lights, auroras, gas flares, and fires. Pixels in DMSP-OLS have a …
UNESCO: United Nations Educational, Scientific and Cultural Organisation · 2024 Spanish
guardia en las murallas” y tiene “en sus ojos, las auroras de los tiempos antiguos/Y en su cabeza, la canción …
IUCN: International Union for Conservation of Nature · 2024 English
Light pollution is the human-caused alteration of outdoor light levels from those occurring naturally. It threatens ecological and commemorative integrity, interferes with amateur and research astronomy, degrades the appreciation of …
seen towards the setting Sun, and gegenschein; auroras; lightning and, rarely, sprites. More germane to … notably ephemeral such as lightning, wildfires, auroras and bioluminescence. Once night arrives, the brightest …
Transport Action Canada · 9 December 2023 English
Newsletter
newmarkettoday.ca/coronavirus-covid-19-local-news/auroras-historic-go-train- station-getting-a-face-lift-3179079 … newmarkettoday.ca/coronavirus-covid-19-local-news/auroras-historic-go-train-station-getting-a-face-lift-3179079 …
INREA: National Institute for research in technical sciences for the environment and agriculture · 5 November 2023
Corroborated by historical eye-witness accounts of red auroras, our results suggest a global exposure to strong … Korean Peninsula suggest the occurrence of red auroras between late-992 and early-993 CE31, which could … L3 (2013). 31. Hayakawa, H. et al. Historical auroras in the 990s: evidence of great magnetic storms …
IEEE: Instituto Español de Estudios Estratégicos · 31 October 2023 Spanish
Capítulo cuarto Ciencia en colaboración en el Ártico Antonio Quesada del Corral Resumen Los cuatro años polares internacionales que han tenido lugar en algo menos de siglo y medio —el …
fundamenta- les en la actividad solar como las auroras. Así, se propusieron como objetivos el aumento …
IEEE: Instituto Español de Estudios Estratégicos · 26 October 2023 Spanish
El Ártico es un espacio que, hasta la invasión rusa Ucrania en 2022, había permanecido excepcionalmente al margen de este conflicto y aún de la propia globalización. En la región …
fundamenta- les en la actividad solar como las auroras. Así, se propusieron como objetivos el aumento …
World Bank Group · 9 October 2023 English
Given increasing levels of displacement due to conflict and climate change, it is important to establish robust monitoring systems. This paper explores how remote sensing data, particularly geospatial data, can …
capturing other nighttime lights phenomena such as auroras.” (WB, 2020).3 This data is available for every …
World Bank Group · 4 October 2023 English
Given increasing levels of displacement due to conflict and climate change, it is important to establish robust monitoring systems. This paper explores how remote sensing data, particularly geospatial data, can …
capturing other nighttime lights phenomena such as auroras.” (WB, 2020).3 This data is available for every …
CIRANO: Centre for Interuniversity Research and Analysis on Organizations · 25 July 2023
11For example, the counties of McKenzie, Mountrail, and Williams in North Dakota, the county of Bernalillo in New Mexico, the counties of Modland, Ector, Winkler in Texas and the counties …
observe dim signals such as city lights, gas flares, auroras, wildfires and reflected moonlight. Credit: NASA …
