KEYWORDS: Aerosols, Solar radiation, Clouds, Temperature metrology, Meteorology, Chemical elements, Environmental sensing, Climatology, Air contamination, Atmospheric particles
Study is performed of the weekly cycle of temperature indices (its diurnal range, mean, maximum and minimum) as
well as cloudiness, solar radiation and air pollution index based on 1996-2005 surface observations and air pollution
indexes from four big cities over the Yangtze River Delta of China. Results suggest that these temperature variations are
featured by significant weekend effect (WE) in that these temperatures are higher at weekends than on workdays in
summer as opposed to those in other seasons; the WE of diurnal maximum and minimum temperatures is much bigger at
weekends and can be utilized as the WE index; during the long spell of holidays or festivities in China WE is remarkable,
and especially in the Spring Festival and National Day holidays these temperatures are smaller compared to those 7 day
before and after as opposed to the values during, and 7 days before/after, the May Day holidays; the temperature WE
bears a close relation to aerosol concentration thanks to anthropogenic activities; in summer the indirect impacts of
aerosols (aerosol - cloud interactions) due to abundant vapor play a dominant role and at weekends little aerosol is
responsible for reduced cloudiness, allowing more solar radiation to strike the ground for the rise in all the temperatures;
in the other seasons the direct and semi-direct effect of aerosol plays a predominant part, with the concentration of
aerosols declining at weekends for reducing its ability to heat air and increasing cloudiness, thus leading to the decrease
in all the temperature elements.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.