Possible UHI effect at Barrow Alaska – 25 May 2011

With a NE wind this morning the town of Barrow Alaska lies downwind of the Climate Reference Network site (BARRO) and upwind of the ASOS site (PABR) located on the southwest side of town.  Could UHI effects explain the rather large difference (3-5 deg F) in temperature this morning between the two sites?  The 2 observing sites are situated only about 4 miles apart over flat tundra.
http://www.atmos.washington.edu/marka/sfcplot.pabr.gif

CRN site NE of  Barrow:

             UTC
DY STA   TP HHMM N CIG VSBY    WEA   SLP    T  TD DIR SP GS PK  ALT 
25 BARRO cn 1100                           26                       
25 BARRO cn 1200                           26 
25 BARRO cn 1300                           27

ASOS site SW side of Barrow:

25 PABR  SA 1053 0>120   10        1020.2  31  30  50  6       30.13   
25 PABR  SA 1153 0>120   10        1020.0  30  29  40  6       30.12
25 PABR  SA 1253 0>120   10        1019.3  30  29  40  8       30.10

While Alaska’s mean annual temperature (24 site composite) has shown little change over the past 34 years:

http://www.atmos.washington.edu/marka/tmean.alaska.annual.1977-2010.gif

Barrow’s (PABR) mean annual temperature has risen about +2.5 F over that same period:
http://www.atmos.washington.edu/marka/tmean.barrow.annual.1977-2010.gif

Advertisements
This entry was posted in Alaska. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s