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Backward Trajectory Map in February 2012

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 February 2012 is now available on the following webpage:

In February 2012, the air masses reaching Hong Kong originated sometimes from the east, sometimes from the northeast and even from the northwest, indicating that the territory was influenced by the interchanging northeast monsoon and humid maritime airstream.

Backward Trajectory of Air Mass reaching Hong Kong in February 2012


For Daily or Seasonal Backward Trajectory Maps, please visit the following webpages:

Daily Backward Trajectory Map

Seasonal Backward Trajectory Map


Last revision date: <20 Dec 2012>