Backward Trajectory Map in December 2011
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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 December 2011 is now available on the following webpage:
In December 2011, the air masses reaching Hong Kong mainly originated from the north and northwest, indicating that the territory was under the influence of the winter monsoon for most of the month. |
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Backward Trajectory of Air Mass reaching Hong Kong in December 2011
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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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