The signal of aerosol-induced changes in sunshine duration records: A review of the evidence

摘要: Aerosols play a significant yet complex and central role in the Earth's radiation budget, knowledge of long-term changes atmospheric turbidity induced by aerosols is therefore fundamental for better understanding climate change. However, there little available information on aerosol concentration atmosphere, especially prior to 1980s. The present paper reviews publications reporting suitability sunshine duration records with regard detecting aerosols. Some studies reviewed propose methods estimating aerosol-related magnitudes, such as turbidity, from deficit at approximately sunrise sunset, when impact solar beam more easily observed. In addition, abundant evidence that one cause decadal observed involves variations loading. Possible directions future research are also suggested: particular, detailed burn (not only its length but width) registered means Campbell-Stokes recorders may provide way creating time series loading metrics dating back over 120 years present.