Norman's Words

  Reference research papers :   Variations of respirable suspended particulates in Hong Kong: cross-boundary and local effects Carbon and Trace Element Compositions of Total Suspended Particles (TSP) and Nanoparticles (PM0.1) in Ambient Air of Southern Thailand and Characterization of Their Sources Chemical characteristics and source apportionment of fine particulate organic carbon in Hong Kong during high particulate matter episodes in winter 2003 EPA IO [Inorganic] Compendium Method IO-3.1: Selection, Preparation, and Extraction of Filter Material  Source Apportionment and Risk Estimation of Heavy Metals in PM10 at a Southern Vietnam Megacity

On 22 March, Air Pollution Index reached a record high of 500 since 1995. According to Environmental Protection Department, the high levels of Respirable Suspended Particulates, the contributing pollutant, were partly caused by a sandstorm in northern China, which has been moving south. It seems that a pre-alert system is necessary to warn the Hong Kong residents in advance of any sandstorm attack in the future.