JE-VOLUME 03 ISSUE 04 NOVEMBER 2014


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Volume 3 Issue 4, November 2014

Journal of Environment

ISSN

2049-8373

Publication Frequency

6 Issues per year

Pages

51-64

Publication History


Original Articles

Analysis of Rainfall Trends in the South-East Bangladesh

Zaheed Hasan, Sabiha Akhter and Alamgir Kabir

Pages 51-56

Meteorology and Photochemical Air Pollution in Western Mediterranean Basin; Focused Analysis on Algerian Coast

Benameur Hamoudi, Fethi Saidi, Boumedienne Beladjine and Abbes Azzi

Pages 57-64


Title

Analysis of Rainfall Trends in the South-East Bangladesh

Abstract

This paper explores annual and seasonal trends of rainfall in the South-East part of coastal Bangladesh over the period between 1980 and 2011. Non-parametric- Mann-Kendall and Sen’s test estimate is applied for detecting and estimating rainfall trends respectively. An assessment of rainfall data indicate amount of annual rainf-all in South-East Bangladesh is increasing although this trend is not statistically significant. Seasonal analysis reveals least amount of rainfall occurs in winter and it is getting drier. However, trends analysis indicates the other three seasons, e.g. Pre-Monsoon, Rainy Monsoon and Post Monsoon, are becoming wetter. It is important to note that among all the seasons rainfall in Pre-Monsoon is increasing significantly (significant at p= 0.05 level) and the rate of increase is 8.5 mm/year.

Keywords

Rainfall, Bangladesh, Trend analysis, Mann-Kendall Test, Sen’s Test, Annual Trend, Seasonal Trend

Title

Meteorology and Photochemical Air Pollution in Western Mediterranean Basin; Focused Analysis on Algerian Coast

Abstract

In this study a summer air pollution episode from 31st of July to 1st of August 2013 over the Western Mediterranean Basin (WMB) is investigated and analysed through advanced atmospheric modelling. This episode was reported from the air quality simulations performed during this period for the Transport and Transformation of air pollutants from South Europe to North Africa. The present study is concentrated on ground level Ozone (O3), oxide nitric (NO), dioxide nitrogen (NO2) concentrati-ons variability in order to determine the role of large scale atmospheric transport on the behaviour of tropospher-ic ozone and its precursors. During this episode the synoptic condition showed by the meteorological WRF model favours the developm-ent of mesoscale circulation, which enhances the long range transport of polluted air masses toward the Algerian Coast. Moreover, the photochemical model results of both days simulated are compared with observed data and it shows a good concordance about the O3 and NOx, while a similarity in temporal variation of the concentrations of compounds studied is detected during this episode

Keywords

CAMx, O3-NO-NO2, South Europe, North Africa, Algerian Coast