CLIMATE  TRENDS

Brian Gunter, Narooma, NSW, Australia    http://members.westnet.com.au/brigun/mawson-temps.html

"Trends are not always trendy"

 

   

 

 

 

TEMPERATURE TRENDS AT MAWSON STATION, ANTARCTICA

 

 

 

 

Has the Antarctic continent become significantly warmer in recent years? 

Here is a detailed analysis of the temperature data recorded at Mawson station since 1954.  

 

 

 

 

 

Mawson station, in Antarctica, is operated by Australia and has unbroken temperature records over a 61-year period  from March 1954 until April 2015.  The data were extracted from the website of the Australian Bureau of Meteorology.  The station is located on the coast of the Antarctic continent (see map) with coordinates 67.60S 62.88E.

 

 

Graphical plots are presented below of annual values of mean maximum, mean minimum, extreme maximum and extreme minimum temperatures for each of the 12 months and also for each year.

 

 

A polynomial trend line was fitted through each of the sets of data.

 

 

This study is a more detailed analysis of temperature trends that I have made for 13 long-term stations in Antarctica.  http://members.westnet.com.au/brigun/antarctica-temps.html   That study showed that mean summer, winter and annual temperatures at 10 of the 13 stations also had essentially zero temperature trends over the past 50-60 years.  The three stations located on the more-northerly Antarctic Peninsula had significant increased temperature over that same period.

 

 

MY CONCLUSION:

 

 

The temperature trends at Mawson of mean night and day, extreme night and day, summer and winter, and annual temperatures are essentially zero over the past 61 years.

 

 

 

So, there is no evidence of change in the temperature at Mawson over the past 61 years!

 

 

 

 

 

 

 

 

ANNUAL AND MONTHLY TEMPERATURE TRENDS AT MAWSON, ANTARCTICA

   

 

 

Annual Mean Maximum & Minimum Temperatures

 

 

 

 

Annual Extreme Maximum Temperatures  

 

 

 

 

Annual Extreme Minimum Temperatures  

 

 

 

January

 

 

 

 

February

 

 

 

 

March 

 

 

 

 

April

 

 

 

 

May

 

 

 

June

 

 

 

July

 

 

 

 

August

September

 

 

 

 

October

 

 

 

 

November

 

 

 

 

December

 

 

 

The Author:

This article was written by Brian Gunter of Narooma, NSW.  In his previous life Brian was an engineering hydrologist involved over many years in the analysis of rainfall and river flow data for the planning of 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.

 

Brian Gunter

brigun@westnet.com.au

7 October 2013       Updated 18 May 2015