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The Solar Spectrum in the Atacama Desert.

R R Cordero1, A Damiani1,2, G Seckmeyer3

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|March 3, 2016
PubMed
Summary
This summary is machine-generated.

Solar surface irradiance significantly increases with altitude in the Atacama Desert due to atmospheric conditions. Measurements show higher irradiance at higher elevations, particularly in the ultraviolet and infrared ranges.

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Area of Science:

  • Atmospheric Science
  • Solar Radiation Physics
  • Remote Sensing

Background:

  • The Atacama Desert is recognized for exceptionally high surface solar irradiance.
  • Unique atmospheric conditions include high altitude, clear skies, and low ozone and water vapor content.

Purpose of the Study:

  • Characterize the solar spectrum and surface irradiance in the Atacama Desert.
  • Quantify the impact of altitude on solar irradiance across different spectral ranges.

Main Methods:

  • Conducted ground-based spectral irradiance measurements from UV to near-infrared.
  • Utilized measurements to derive atmospheric parameters: total ozone column, precipitable water, and aerosol properties.
  • Performed comparative spectral measurements at international observatories.

Main Results:

  • Surface irradiance increases with altitude (0-5100m) due to shorter optical path length and atmospheric composition.
  • Observed irradiance increases of approximately 27% (infrared), 6% (visible), and 20% (ultraviolet) with altitude.
  • Atmospheric parameters (ozone, water vapor, aerosols) were successfully retrieved from spectral measurements.

Conclusions:

  • Altitude is a critical factor driving increased surface solar irradiance in the Atacama Desert.
  • The findings are crucial for applications requiring accurate solar radiation data, such as solar energy and climate modeling.
  • Comparative data from international sites validate the unique conditions and findings in the Atacama Desert.