Event Title

A Twelve-Year Cold-Air Damming Climatology of Northern New England

Faculty Sponsor(s)

Eric Hoffman

Location

Hartman Union Building Courtroom

Presentation Type

Event

Start Date

5-3-2018 2:00 PM

End Date

5-3-2018 3:00 PM

Abstract

Cold-air damming (CAD) events occur on the leeward side of mountain ranges and can produce freezing rain and icing. A 12-year cold season (Oct.-Mar.) subjective climatology of CAD events in the Northern Appalachian mountains was created using objective guidelines. Hourly surface potential temperature analysis maps created in GEMPAK similar to those available online at SUNY Albany were used to identify events. These displayed hourly potential temperature contours, station plots, and shaded potential temperature gradients. Events were identified when cold air pooled east of the mountains and warm air wrapped around to the east and west of the damming region. This method identified 139 events over the 12 cold seasons. Events are most frequent in December and are centered in northern New Hampshire and southern Maine. The average duration of an event is 13.7 hours. Synoptic analysis shows that the majority of events feature a low sea-level pressure center over the Great Lakes and a high sea-level pressure center over Quebec and New Brunswick. Future work will include additional investigation of societal impacts using weather watches, warnings, and advisories (e.g. freezing rain and icing), as well as precipitation in identified events.

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May 3rd, 2:00 PM May 3rd, 3:00 PM

A Twelve-Year Cold-Air Damming Climatology of Northern New England

Hartman Union Building Courtroom

Cold-air damming (CAD) events occur on the leeward side of mountain ranges and can produce freezing rain and icing. A 12-year cold season (Oct.-Mar.) subjective climatology of CAD events in the Northern Appalachian mountains was created using objective guidelines. Hourly surface potential temperature analysis maps created in GEMPAK similar to those available online at SUNY Albany were used to identify events. These displayed hourly potential temperature contours, station plots, and shaded potential temperature gradients. Events were identified when cold air pooled east of the mountains and warm air wrapped around to the east and west of the damming region. This method identified 139 events over the 12 cold seasons. Events are most frequent in December and are centered in northern New Hampshire and southern Maine. The average duration of an event is 13.7 hours. Synoptic analysis shows that the majority of events feature a low sea-level pressure center over the Great Lakes and a high sea-level pressure center over Quebec and New Brunswick. Future work will include additional investigation of societal impacts using weather watches, warnings, and advisories (e.g. freezing rain and icing), as well as precipitation in identified events.