USA Temperatures

Analyses were made of monthly and annual trends in temperatures at 25 rural stations located throughout contiguous USA (ie excluding Alaska and Hawaii).   These stations were all at rural locations and were selected on the basis of their long records (generally over 100 years), their station quality (not near buildings, large trees, airports, etc) and the continuity of their records (generally less than 5% of missing data).

The analyses were of the raw temperature data (ie as originally recorded) without any “homogenisation” to account for missing data, changes in station location or for urbanisation effects.

USA522letterBWPrint

 

USA Table

The stations selected were assessed to be of good quality, based on the Surface Stations Project survey (2011) of 1007 US stations, and with largely-complete records of over a century.  Furthermore, these records were to extend up to at least 2010 (but generally until 2014). 

The mean monthly data were downloaded from the website of KNMI (The Royal Dutch Meteorological Institute).

Using Excel, simple plots were made of the annual mean temperature data.   No estimates were made of missing data. A polynomial fit was made based on the full period of records.

 

CEDAR LAKE, WA   1909-2014

cedar-2

 

PRIEST RIVER, ID  1898-2014

priest2

 

UNION, OR  1911-2010

unioni2

 

FENN RANGER STATION, ID  1908-2014

fenn-t44

 

ABERDEEN, ID  1914-2014

aberde3

 

MOCCASIN, MT  1909-2014

moccas44

 

QUINCY, CA  1895-2014

quincy16

 

FALLON, NV  1889-2014

fallon30

 

FAIRMONT, CA  1911-2014

fairmo16

 

FORT VALLEY, AZ  1909-2014

fort-v2

 

LUNA, NM  1900-2014

luna-t30

 

JORNADA, NM  1914-2014

jornad2

 

ELEPHANT BUTTE DAM, NM  1908-2014

elepha2

 

TUCUMCARI, NM  1905-2014

tucumc46

 

CHEYENNE WELLS, CO  1897-2014

cheyen30

 

CRETE, NE  1893-2014

crete-44

 

MORRIS, MN  1886-2014

morris2

 

CHATHAM, MI  1900-2014

chatha16

 

SAINT JOSEPH, LA  1894-2014

saint-16

 

PORT GIBSON, MS  1889-2014

port-g2

 

KOSCIUSKO, MS  1889-2014

kosciu16

 

CROSSVILLE, TN  1912-2014

crossv58

 

ROYAL OAK, MD  1893-2014

royal-2

 

CHARLOTTEBURG RESERVOIR, NJ  1893-2014

charlo2

 

SETAUKET STRONG, NY  1885-2012

setauk32

 

COMMENTS:

Most stations exhibit a cyclical trend over the past century with maximums around 1920 or 1930 and minimums around 1980 or 1990.

About 70% of the stations have an overall neutral or negative trend over the past century.

 

 

The Author:

This article was written by Brian Gunter Narooma, NSW. In his previous life Brian was an engineering hydrologist involved over many years in the analysis of rainfall and river flow of data for the planning of major water resources projects in Australia, Asia and Africa. In recent years he has been one of the Marine Rescue NSW (previously Royal Volunteer Coastal Patrol) volunteer weather observers who operate the Narooma station for the Bureau of Meteorology.

brigun@westnet.com.au

 

 

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