Normalized Cross-Correlations of Solar Cycle and Physical Characteristics of Cloud
| Autor: | Heon-Young Chang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Sunspot
lcsh:Astronomy business.industry media_common.quotation_subject data analysis General Physics and Astronomy Cosmic ray Cloud computing Atmospheric sciences Solar maximum Asymmetry Solar cycle lcsh:QB1-991 Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics General Earth and Planetary Sciences Environmental science solar activity business terrestitrial climate Astrophysics::Galaxy Astrophysics Physics::Atmospheric and Oceanic Physics Water vapor Optical depth media_common |
| Zdroj: | Journal of Astronomy and Space Sciences, Vol 36, Iss 4, Pp 225-234 (2019) |
| ISSN: | 2093-1409 2093-5587 |
| Popis: | We explore the associations between the total sunspot area, solar north-south asymmetry, and Southern Oscillation Index and the physical characteristics of clouds by calculating normalized cross-correlations, motivated by the idea that the galactic cosmic ray influx modulated by solar activity may cause changes in cloud coverage, and in turn the Earth’s climate. Unlike previous studies based on the relative difference, we have employed cloud data as a whole time-series without detrending. We found that the coverage of high-level and low-level cloud is at a maximum when the solar north-south asymmetry is close to the minimum, and one or two years after the solar north-south asymmetry is at a maximum, respectively. The global surface air temperature is at a maximum five years after the solar north-south asymmetry is at a maximum, and the optical depth is at a minimum when the solar north-south asymmetry is at a maximum. We also found that during the descending period of solar activity, the coverage of low-level cloud is at a maximum, and global surface air temperature and cloud optical depth are at a minimum, and that the total column water vapor is at a maximum one or two years after the solar maximum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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