McMurdo Station Fog Climatology 1973-1998 - PowerPoint PPT Presentation

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McMurdo Station Fog Climatology 1973-1998

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McMurdo Station Fog Climatology 1973-1998 Matthew A. Lazzara Antarctic Meteorological Research Center Space Science and Engineering Center University of Wisconsin-Madison – PowerPoint PPT presentation

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Title: McMurdo Station Fog Climatology 1973-1998


1
McMurdo Station Fog Climatology1973-1998
  • Matthew A. Lazzara
  • Antarctic Meteorological Research Center
  • Space Science and Engineering Center
  • University of Wisconsin-Madison

2
Outline
  • Data and A Fog Day
  • Historical review
  • Fun facts to know and tell
  • Interesting items found
  • Future work

A.Cayette
Data 1973-1998 Synoptic observations from NCDC
(Navy) 1999-2003 Climatology reports from
ATS/SPAWAR
Definition A Fog Day There is at least one
hour during the day that fog is reported (present
weather or past weather)
3
McMurdo Fog Climatology Whats Normal?
Poor Data Quantity
US Navy (NCDC)
SPAWAR (Direct)
Why so little fog?
4
McMurdo Fog Climatology 1973-2003 Monthly View
Ice Fog Peak
Liquid Fog Peak
?
5
Fun facts to know and tell
  • More detailed analysis looking at the largest
    fog category reported WMO 40
  • Fog occurs at a wide range of temperatures,
    pressures, wind speeds, cloud coverage, etc.
  • However
  • Fog observations have a very high correlation
    with a preferred wind direction
  • Preferred Temperatures reflect fog type (liquid
    vs. ice)
  • Pressure not too high or low
  • Clouds..

6
Fog most in the wee hours to early morning to
mid-morning 12-0 UTC
7
Majority of the fog events have an Easterly wind
component!
8
East to East Southeasterly wind direction!!
9
Winds 0 to 4 MPH to 18 MPH to as high as 35 MPH!!
10
-23 C/-10 F
0 C/32F
Ice Fog!
Liquid Fog!
11
Fog occurs at neither very High nor Low
Pressure
12
Fog occurs with either some or lots of sky
coverage
13
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14
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15
Good News Fog doesnt always have clouds over
it Bad News It does enough, making it hard to
track by satellite
16
Future work
  • Complete this initial review
  • Case Studies 1999 to 2003
  • Detailed/in-depth analysis of events
  • Satellite data Terra and Aqua and more
  • Web site
  • http//amrc.ssec.wisc.edu/fog
  • http//amrc.ssec.wisc.edu/realfog.html
  • Input from you!
  • Observers
  • Pilots
  • Forecasters
  • Researchers
  • Others

17
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18
Questions ?E-mailmattl_at_ssec.wisc.eduFog
Web Sitehttp//amrc.ssec.wisc.edu/foghttp//amr
c.ssec.wisc.edu/realfog.html
Linda AWS site/M.Lazzara
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