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Comparison of Surface and Satellite Observations of Clouds and Solar Radiation Over Europe

This study explores the correlation between ground-based and satellite observations of clouds and solar radiation in Europe. Analyzing data from GEBA and ISCCP, it estimates radiative anomalies linked to cloud cover anomalies in order to connect synoptic cloud reports with solar radiation data. The Cloud Cover Radiative Forcing (CCRF) anomaly is calculated as the mean SW CRF over mean cloud cover, multiplied by the total cloud cover anomaly. The correlation between SW Flux Estimated from Synoptic Reports is found to be 0.87, adjusted to 1.8 to consider the positive correlation between cloud cover and cloud thickness anomalies.

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Comparison of Surface and Satellite Observations of Clouds and Solar Radiation Over Europe

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  1. Comparison of Surface and Satellite Observations of Clouds and Solar RadiationOver Europe Joel Norris GEWEX Cloud Assessment Meeting 6 July 2006

  2. ×= GEBA station ● = cloud station − = ISCCP grid box

  3. SW Flux Estimated from Synoptic Reports • Estimate radiation anomalies due to cloud cover anomalies to bridge between synoptic cloud reports and GEBA and ISCCP FD solar radiation data SW Cloud Cover Radiative Forcing (CCRF) anomaly = (mean SW CRF / mean cloud cover) × total cloud cover anomaly )

  4. SW Flux Estimated from Synoptic Reports correlation = 0.87

  5. SW Flux Estimated from Synoptic Reports correlation = 0.87 ×1.8 to account for the positive correlation between cloud cover and cloud thickness anomalies

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