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McMurdo Station Fog Climatology 1973-1998

McMurdo Station Fog Climatology 1973-1998. Matthew A. Lazzara Antarctic Meteorological Research Center Space Science and Engineering Center University of Wisconsin-Madison. Outline. Data and “A Fog Day” Historical review Fun facts to know and tell… Interesting items found… Future work.

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McMurdo Station Fog Climatology 1973-1998

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  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: What’s Normal? Poor Data Quantity US Navy (NCDC) SPAWAR (Direct) Why so little fog?

  4. McMurdo Fog Climatology 1973-2003: Monthly View Liquid Fog Peak “Ice” Fog Peak ?

  5. 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….. Fun facts to know and tell…

  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. Good News: Fog doesn’t always have clouds over it Bad News: It does enough, making it hard to track by satellite

  14. 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

  15. Questions ?E-mail:mattl@ssec.wisc.eduFog Web Site:http://amrc.ssec.wisc.edu/foghttp://amrc.ssec.wisc.edu/realfog.html Linda AWS site/M.Lazzara

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