Original title: Millennium-Scale Atlantic Multidecadal Oscillation and Soil Moisture
Influence on Western Mediterranean Cloudiness
Five Key Points of this Research Paper
- Climate Implications: This study highlights complex interactions between solar variability, oceanic oscillations, and cloudiness, emphasizing the need for further research on Earth’s energy balance and regional climate dynamics. The earth’s climate system is far more complex than just manmade CO2 as the climate driver.
- Modern Warming Patterns: Recent decades show unprecedented low cloud cover, high solar activity, and elevated temperatures, resembling medieval patterns before 1250 CE.
- Millennial-Scale Cloud Cover Reconstruction: The study provides the first annual total cloud cover (TCC) reconstruction for the western Mediterranean from 969 to 2022 CE, revealing long-term cloudiness trends. It was warmer during the Medieval Warm Period (950-1350).
- Historical Trends: Cloudiness increased until 1600 CE, then decreased significantly, influenced by the 1815 Mount Tambora eruption, solar forcing, and Atlantic Multidecadal Oscillation (AMO) shifts.
- Climatic Influences: Soil moisture (via Palmer Drought Severity Index)and AMO strongly correlate with TCC, with storm rainfall enhancing cloudiness, particularly in summer. Clouds warm the earth at night by holding in the heat and cool the days by reflecting the sun’s energy.
