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Long Range Transport Contribution to PM 10 Concentrations in a Subtropical City (Qena/Egypt)

Year: 2014
Type: article
Abstract: Particulate matter (PM10) concentrations have been measured during the period (May-2006 to April-2012) in forecasting and research center, south valley university in Qena-Egypt. The data have been matched with backward air mass trajectories calculated by HYSPLIT4 for assessing long range transport influence in PM10 concentrations. In this regard, Effect of different air masses has been studied using clustering technique of backward air mass trajectories during the whole period as well as during different seasons. Statistical analysis techniques have been used for assessing significance of inter- cluster variation in PM10 concentration and explained variance of PM10 by different clusters as well as for defining the significant differences in PM10 concentration associated with different clusters. In addition, probable source regions of PM10 have been determined. Results show that seasonal average PM10 concentrations characterized with maximum value 103 ± 7% µg/m^3 in spring and minimum values 89 ± 6% µg/m^3 and 89 ± 5% µg/m^3 in winter and autumn, respectively. Northern clusters comprised68%, 52%,88%and71% of the total number of trajectories during all the period, spring, summer and autumn, respectively. One of these clusters in each period is associated with the maximum concentration of PM10, 105 µg/m^3, 124 µg/m^3, 139 µg/m^3 and 97 µg/m^3, respectively. The situation is changed during winter, where, air masses are originated mostly from northwest direction with 44% of the trajectories, with maximum concentration 100 µg/m^3associated with one of these clusters. North of Africa and south-west of Turkey are found to be the most probable sources of PM10 during spring and all the period, respectively.
Author: O Kassem Kh.
Language: English
Open Access status: diamond
OpenAlex ID: W110094210
FWCI:
Cites: 34
Cited by: 2
Related to: 10