From Dimming to Brightening: Decadal Changes in Solar Radiation at Earth's Surface

  title={From Dimming to Brightening: Decadal Changes in Solar Radiation at Earth's Surface},
  author={Martin Wild and Hans Gilgen and Andreas Roesch and Atsumu Ohmura and Charles Long and Ellsworth G. Dutton and Bruce W. Forgan and Ain Kallis and Viivi Russak and A. V. Tsvetkov},
  pages={847 - 850}
Variations in solar radiation incident at Earth's surface profoundly affect the human and terrestrial environment. A decline in solar radiation at land surfaces has become apparent in many observational records up to 1990, a phenomenon known as global dimming. Newly available surface observations from 1990 to the present, primarily from the Northern Hemisphere, show that the dimming did not persist into the 1990s. Instead, a widespread brightening has been observed since the late 1980s. This… 
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Changes in Earth's Albedo Measured by Satellite
The satellite data show that the last four years are within natural variability and fail to confirm the 6% relative increase in albedo inferred from observations of earthshine from the moon.
Aerosols, Climate, and the Hydrological Cycle
Human activities are releasing tiny particles (aerosols) into the atmosphere that enhance scattering and absorption of solar radiation, which can lead to a weaker hydrological cycle, which connects directly to availability and quality of fresh water, a major environmental issue of the 21st century.
The cause of decreased pan evaporation over the past 50 years.
It is shown that the decrease in evaporation is consistent with what one would expect from the observed large and widespread decreases in sunlight resulting from increasing cloud coverage and aerosol concentration.
Is the Hydrological Cycle Accelerating?
As global climate warms, most atmospheric scientists believe that evaporation will increase and as a result, the hydrological cycle will accelerate. But results from a network of water-filled pans
References and Notes
our experimentation could eventually be used to discredit our findings, should they happen not to agree with the original observations. It seems important that all experiments in the rapidly
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