Article history: Received 1 December 2011 Received in revised form 4 February 2012 Accepted 21 February 2012 Available online 27 February 2012

Article history: Received 21 December 2010 Revised 1 February 2011 Accepted 3 February 2011 Available online 10 February 2011 Communicated by Arne Winterhof MSC: 11K38 11K45 65C05 65D30

this study utilizes a decade long (2005-2014) monthly data of total column tropospheric ozone (tcto) in dubson units to evaluate the spatial and temporal trend of lao over some major cities of west africa, namely lagos, accra, niamey, abuja, bamako, dakar, agadez, conakry, kano, and ouagadougou which are either capital cites or major commercial hubs, where the population ranges from 0.09 millio...

In this study, drought in Portugal was assessed using 74 time series of Standardized Precipitation Index (SPI) with a 12-month timescale and 66 years length. A clustering analysis on the SPI Principal Components loadings was performed in order to find regions where SPI drought characteristics are similar. A Fourier analysis was then applied to the SPI time series considering one SPI value per y...

Biological and non-biological aerosols are always present. According to the World Health Organization (WHO), air pollution is responsible for seven million deaths every year. The dynamics of airborne fungi their association with pollutants over time show mixed results. In this study, we sampled 50 L daily a period 12 months (February 2022–January 2023) in downtown Monterrey, Mexico evaluate pre...

Article history: Received 18 December 2016 Accepted 16 February 2017 Available online 25 February 2017