Backward Trajectory Map in July 2010
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By using computer model analyses, the past 72-hour backward trajectory of the air mass reaching Hong Kong is estimated by the Observatory on a daily basis. The daily trajectories are compiled into the Monthly Backward Trajectory Map. The Monthly Map for July 2010 is now available on the following webpage: As revealed from the figure below, most of the air masses reaching Hong Kong in July 2010 originated from the South China Sea, while the rest from the western North Pacific.
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Backward Trajectory of Air Mass reaching Hong Kong in July 2010
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For Daily or Seasonal Backward Trajectory Maps, please visit the following webpages: Daily Backward Trajectory Map Seasonal Backward Trajectory Map
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