Identifying patterns and sources of anthropogenic trace metals in the Argentine Central Andes by using snow samples and an atmospheric dispersion model

Ruggeri, María Florencia; Castesana, Paula; Bolaño-Ortiz, Tomás R.; Puliafito, Salvador Enrique; Flores, Romina María Pascual; Altamirano, Jorgelina Cecilia; Allende, David Gabriel

doi:10.1039/d0em00096e

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“…Although recently, studies such as those conducted in Argentina show that volcanic ash can generate a great impact of albedo changes in the mass balance of glaciers in South America [36]. Additionally, numerous studies around the world have analyzed the variations of snow albedo to understand how its snow cover and snowpack are changing due to increased temperature and the presence of LAI, and, therefore, the associated radiative forcing in the climate [10,17,23,28,29,[37][38][39][40][41][42][43][44][45][46][47][48][49].…”

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confidence: 99%

ENSO and Light-Absorbing Impurities and Their Impact on Snow Albedo in the Sierra Nevada de Santa Marta, Colombia

2020

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Snow albedo is an important variable in the coupled atmosphere-earth system at the global level. Moreover, studying its behavior allows us to know the state of the cryosphere. The Sierra Nevada de Santa Marta (SNSM) is a glacier area and the northernmost tropical (10.82° N, 73.75° W) region in South America. It has a height of up to 5775 m.a.sl., which is the second highest mountain in the world near the marine coast. We analyzed variations in snow albedo related to snow cover, snowfall, temperature, light-absorbing impurities such as blank carbon (BC), organic carbon (OC) and dust, and El Niño—Southern Oscillation (ENSO) phenomenon through 20 years (2000–2020). We mainly use daily data from the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard the Terra and Aqua NASA satellites. Results showed through correlations that snow albedo has decreased due to Land Surface Temperature (55%, p < 0.001), a positive phase of ENSO (42%, p < 0.001) and dust (37%, p < 0.01) in the SNSM. Additionally, a dust negative effect was more evident on the southern side (up to 49%, p < 0.001) of the SNSM. Backward trajectories by the NOAA HYSPLIT model suggest that dust sources would be soil erosion in the surrounding region. Results can help recognize the influence of ENSO and dust in the glacier decrease of the SNSM.

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Section: Introductionmentioning

confidence: 99%

ENSO and Light-Absorbing Impurities and Their Impact on Snow Albedo in the Sierra Nevada de Santa Marta, Colombia

2020

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Identifying patterns and sources of anthropogenic trace metals in the Argentine Central Andes by using snow samples and an atmospheric dispersion model

Abstract: This study presents the first local measurements of metals in snow from the Argentine Central Andes.

Cited by 1 publication

References 43 publications

ENSO and Light-Absorbing Impurities and Their Impact on Snow Albedo in the Sierra Nevada de Santa Marta, Colombia

ENSO and Light-Absorbing Impurities and Their Impact on Snow Albedo in the Sierra Nevada de Santa Marta, Colombia

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