Assessing large-scale weekly cycles in meteorological variables: A review
Several studies have claimed to have found significant weekly cycles of\nmeteorological variables appearing over large domains, which can hardly\nbe related to urban effects exclusively. Nevertheless, there is still an\nongoing scientific debate whether these large-scale weekly cycles exist\nor not, and some other studies fail to reproduce them with statistical\nsignificance. In addition to the lack of the positive proof for the\nexistence of these cycles, their possible physical explanations have\nbeen controversially discussed during the last years. In this work we\nreview the main results about this topic published during the recent two\ndecades, including a summary of the existence or non-existence of\nsignificant weekly weather cycles across different regions of the world,\nmainly over the US, Europe and Asia. In addition, some shortcomings of\ncommon statistical methods for analyzing weekly cycles are listed.\nFinally, a brief summary of supposed causes of the weekly cycles,\nfocusing on the aerosol-cloud-radiation interactions and their impact on\nmeteorological variables as a result of the weekly cycles of\nanthropogenic activities, and possible directions for future research,\nis presented.