Station location: 66°17'S, 110°32'E, Bailey Peninsula, Vincennes Bay, Budd Coast, Wilkes Land, East Antarctica.
WMO identification: 89611
Data in black are derived from the READER dataset and are calculated from 6-hourly synoptic data. Note that this dataset comprises observations from three sites: Wilkes (66°15'S, 110°35'E) from 1 Jan 1959 to 12Z 21 Feb 1969, Casey (The Tunnel) (66°17'S, 110°32'E) from 18Z 21 Feb 1969 to 31 Jan 1989 and the present station (66°17'S, 110°32'E) from 1 Jan 1990 onwards. The value for February 1969 is calculated from the combined observations at Wilkes and Casey (The Tunnel) in that month. Although the location of the most recent two stations is very similar the current station is at 40 m a.s.l. rather than 12 m a.s.l.; the approximately one year of overlap is deemed too small to produce reliable offsets and no 'correction' has been made.
Data in blue are taken from other sources. Values before February 1960 are derived from Wilkes when it was run by the United States. The data were kindly supplied by Dr Dave Bromwich of the Byrd Polar Reasearch Center from the following:
In the above, the monthly mean is calculated as the mean of the maximum and minimum monthly values as measured to the nearest degree Fahrenheit; if the result is not a whole number then the value has been rounded up, giving a positive bias of 0.2 or 0.3°C when converted to centigrade. Moreover, there appear to be a number of errors in this simple calculation within the US data. In the dataset shown below, to remove as many rounding errors as possible the monthly maximum and minimum values are converted to centigrade before calculating the mean, unlike
which simply converts the mean from the above references, together with the positive bias and the errors in calculating the monthly mean. In turn this reference was used by
Jones, P.D. and P.A. Reid. 2001: A Data Bank of Antarctic Surface Temperature and Pressure Data. ORNL/CDIAC-27 NDP-032. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee.
This report can be accessed here.
These data have been included in the statistics because, as the table below shows, in the 1960 Feb-Dec period of overlap the values are very similar to the Australian data given the diminished accuracy of recording to the nearest Fahrenheit and the different methods of calculating the mean.
| Month/Year | US data (°C) | Australian data (°C) | Difference (°C) |
|---|---|---|---|
| 02/1960 | −2.2 | −2.1 | −0.1 |
| 03/1960 | −10.0 | −9.8 | −0.2 |
| 04/1960 | −12.8 | −13.0 | −0.2 |
| 05/1960 | −16.4 | −16.1 | −0.3 |
| 06/1960 | −17.2 | −17.1 | −0.1 |
| 07/1960 | −21.7 | −21.6 | −0.1 |
| 08/1960 | −13.9 | −13.8 | −0.1 |
| 09/1960 | −14.4 | −14.2 | −0.2 |
| 10/1960 | −10.8 | −10.8 | 0.0 |
| 11/1960 | −4.4 | −4.2 | −0.2 |
| 12/1960 | −1.4 | −1.2 | −0.2
|
Other values in blue (April and May 1961 and September 1972) are missing from the READER dataset and are also taken from Jones and Reid (2001). They too have been included in the statistics.
Data after 2005, shown in red, have been provided by Doug Shepherd and Ian Barnes-Keoghan of the Australian Bureau of Meteorology and are based on 3-hourly synoptic data. These values will be adjusted to be compatible with the READER data at some point in the future; however, any differences will be minimal.
Go straight to the data.
(i) Annual, seasonal and monthly temperature statistics for Casey
With regard to summer (DJF) the year refers to the December.
| Annual/Season/Month | Mean (°C) | σ (°C) | Min. (°C) | q0.25 (°C) | q0.75 (°C) | Max. (°C) | Period | n |
|---|---|---|---|---|---|---|---|---|
| Calendar year | −9.2 | 0.9 | −11.3 | −9.7 | −8.7 | −6.7 | 1958-2011 | 54 |
| Autumn | −10.7 | 1.8 | −15.4 | −11.6 | −9.6 | −7.1 | 1957-2012 | 56 |
| Winter | −14.6 | 1.9 | −18.3 | −15.7 | −13.3 | −10.5 | 1957-2012 | 56 |
| Spring | −10.4 | 1.3 | −13.2 | −11.3 | −9.3 | −7.9 | 1957-2012 | 56 |
| Summer | −1.2 | 0.6 | −3.1 | −1.6 | −0.8 | 0.0 | 1957-2011 | 55 |
| January | −0.1 | 0.9 | −2.0 | −0.8 | +0.6 | +1.8 | 1958-2012 | 55 |
| February | −2.5 | 0.9 | −4.5 | −3.1 | −2.1 | +0.4 | 1958-2012 | 55 |
| March | −6.7 | 1.7 | −10.2 | −8.0 | −5.6 | −3.1 | 1957-2012 | 56 |
| April | −11.3 | 2.7 | −19.3 | −13.0 | −9.4 | −6.4 | 1957-2012 | 56 |
| May | −14.0 | 2.8 | −20.0 | −16.3 | −11.7 | −8.1 | 1957-2012 | 56 |
| June | −14.3 | 2.7 | −21.1 | −16.4 | −12.4 | −9.7 | 1957-2012 | 56 |
| July | −14.7 | 3.1 | −21.7 | −16.9 | −12.2 | −7.1 | 1957-2012 | 56 |
| August | −14.8 | 2.9 | −22.3 | −16.2 | −12.7 | −8.9 | 1957-2012 | 56 |
| September | −14.3 | 2.8 | −22.2 | −15.6 | −12.3 | −9.3 | 1957-2012 | 56 |
| October | −11.3 | 1.8 | −15.7 | −12.6 | −9.9 | −6.8 | 1957-2012 | 56 |
| November | −5.6 | 1.2 | −8.2 | −6.4 | −4.7 | −3.0 | 1957-2012 | 56 |
| December | −1.0 | 0.9 | −2.9 | −1.6 | −0.5 | +1.2 | 1957-2011 | 55
|
Casey monthly temperature statistics: this plot shows the mean, quartiles and range for each month.
(ii) Annual, seasonal and monthly trends in the Casey surface temperature data
The trends listed below include 95% confidence intervals. The methodology is based upon:
Santer B.D., T.M.L. Wigley, J.S. Boyle, D. J. Gaffen, J.J. Hnilo, D. Nychka, D.E. Parker and K.E. Taylor. 2000: Statistical significance of trends and trend differences in layer-average temperature time series. Journal of Geophysical Research, 105, 7337-7356.
Briefly, an effective sample size is calculated based on the lag-1 autocorrelation coefficient of the regression residuals, This effective sample size is used for the computation of the standard error and in indexing the critical values of the Student''s t distribution.
The significance level of the trend is given if it is less than 10%, 5% or 1%. With regard to summer (DJF) the year refers to the December.
| Annual/Season/Month | Annual trend (°C a−1) | Significance (%) | Period | n |
|---|---|---|---|---|
| Calendar year | +0.0111 ± 0.0180 | - | 1958-2011 | 54 |
| Autumn | −0.0079 ± 0.0369 | - | 1957-2012 | 56 |
| Winter | +0.0271 ± 0.0340 | - | 1957-2012 | 56 |
| Spring | +0.0150 ± 0.0179 | - | 1957-2012 | 56 |
| Summer | −0.0053 ± 0.0142 | - | 1957-2011 | 55 |
| January | −0.0066 ± 0.0149 | - | 1958-2012 | 55 |
| February | −0.0069 ± 0.0141 | - | 1958-2012 | 55 |
| March | −0.0126 ± 0.0294 | - | 1957-2012 | 56 |
| April | +0.0136 ± 0.0686 | - | 1957-2012 | 56 |
| May | −0.0246 ± 0.0530 | - | 1957-2012 | 56 |
| June | +0.0213 ± 0.0447 | - | 1957-2012 | 56 |
| July | +0.0295 ± 0.0515 | - | 1957-2012 | 56 |
| August | +0.0304 ± 0.0434 | - | 1957-2012 | 56 |
| September | +0.0500 ± 0.0417 | 5 | 1957-2012 | 56 |
| October | −0.0001 ± 0.0250 | - | 1957-2012 | 56 |
| November | −0.0051 ± 0.0160 | - | 1957-2012 | 56 |
| December | −0.0025 ± 0.0190 | - | 1957-2011 | 55
|
Calendar year
Autumn (MAM)
Winter (JJA)
Spring (SON)
Summer (DJF)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1957 -4.4 -6.4 -11.9 -17.5 -17.8 -12.5 -11.4 -9.4 -4.7 -0.3
1958 -0.3 -2.8 -5.3 -7.5 -8.6 -21.1 -15.3 -18.6 -20.6 -13.3 -5.6 -1.9 -10.1
1959 -0.8 -3.6 -8.6 -8.6 -11.9 -15.0 -14.4 -17.2 -22.2 -9.7 -5.8 -0.8 -9.9
1960 -0.6 -2.1 -9.8 -13.0 -16.1 -17.1 -21.6 -13.8 -14.2 -10.8 -4.2 -1.2 -10.4
1961 -0.1 -2.1 -4.8 -9.2 -10.3 -14.0 -11.5 -12.7 -11.5 -14.0 -5.4 -2.2 -8.1
1962 -1.1 -0.3 -4.3 -12.7 -17.2 -16.6 -21.7 -14.9 -11.8 -9.1 -5.0 -1.5 -9.7
1963 -0.2 -3.3 -8.0 -16.0 -20.0 -13.4 -14.9 -17.3 -11.7 -13.6 -7.0 -1.8 -10.6
1964 -0.1 -2.8 -6.2 -15.3 -17.6 -16.2 -19.2 -14.1 -16.9 -11.2 -4.3 -1.1 -10.4
1965 0.7 -1.6 -7.2 -14.1 -12.9 -17.1 -13.9 -13.8 -17.4 -11.4 -8.2 -1.1 -9.8
1966 -1.7 -2.5 -3.9 -10.8 -14.2 -18.2 -11.3 -16.8 -17.4 -11.9 -4.3 -0.9 -9.5
1967 0.7 -3.2 -6.7 -14.0 -13.1 -12.9 -11.0 -13.5 -10.8 -11.7 -5.4 -1.6 -8.6
1968 -0.4 -2.5 -6.6 -12.4 -15.6 -10.6 -13.9 -14.3 -15.6 -10.6 -4.8 -1.5 -9.1
1969 1.0 -2.6 -9.1 -12.2 -18.2 -15.1 -18.2 -21.6 -17.9 -11.3 -7.2 -1.4 -11.2
1970 -0.3 -2.6 -7.1 -12.9 -12.5 -17.0 -17.1 -20.0 -15.3 -11.6 -4.7 -0.9 -10.2
1971 0.8 -3.2 -5.6 -9.5 -10.1 -11.1 -16.6 -14.8 -16.6 -9.8 -6.2 -0.6 -8.6
1972 1.0 -2.1 -5.7 -10.6 -14.7 -10.5 -13.4 -11.9 -17.2 -15.7 -6.7 -1.3 -9.1
1973 -0.4 -2.9 -5.9 -8.7 -11.4 -12.4 -13.5 -15.8 -14.4 -12.0 -4.1 -1.6 -8.6
1974 0.9 -3.6 -6.9 -14.4 -13.6 -12.0 -16.8 -14.5 -12.8 -7.3 -3.7 0.6 -8.7
1975 0.6 -2.4 -5.4 -14.3 -10.3 -12.6 -11.1 -20.0 -19.1 -12.5 -4.8 -1.1 -9.4
1976 0.1 -1.8 -8.2 -16.8 -14.9 -12.6 -17.9 -15.5 -13.2 -9.0 -4.4 0.5 -9.5
1977 1.8 -2.8 -5.5 -13.0 -10.5 -15.9 -12.4 -13.3 -17.8 -12.3 -6.2 -0.7 -9.1
1978 -0.9 -1.5 -9.6 -12.3 -13.0 -11.2 -13.0 -16.2 -14.9 -12.3 -5.9 -0.9 -9.3
1979 -0.8 -4.1 -6.8 -8.7 -13.0 -14.9 -15.2 -13.8 -15.6 -9.2 -6.6 0.2 -9.0
1980 1.1 -1.3 -3.9 -7.1 -11.0 -11.8 -7.1 -12.8 -10.9 -12.7 -3.0 -0.1 -6.7
1981 0.0 -2.0 -3.1 -10.1 -14.0 -11.0 -11.5 -8.9 -11.7 -9.9 -6.1 -1.2 -7.5
1982 0.0 -2.6 -10.2 -13.7 -11.4 -15.2 -12.1 -22.3 -19.3 -11.0 -6.8 0.0 -10.4
1983 0.5 -1.6 -8.5 -9.9 -10.8 -12.4 -19.9 -14.3 -10.4 -15.0 -6.9 -1.5 -9.2
1984 0.4 -1.3 -3.5 -9.6 -8.1 -15.8 -13.6 -10.7 -14.1 -12.2 -7.9 -0.1 -8.0
1985 0.3 -3.5 -4.2 -9.2 -18.9 -14.7 -17.0 -11.4 -14.4 -11.9 -5.2 -2.2 -9.4
1986 -1.1 0.4 -5.7 -10.8 -13.2 -17.1 -16.0 -12.5 -13.1 -7.9 -5.6 -0.7 -8.6
1987 0.9 -2.3 -7.2 -10.8 -15.1 -10.0 -11.8 -21.5 -12.7 -8.8 -4.9 0.0 -8.7
1988 0.4 -2.1 -8.5 -12.2 -12.1 -14.3 -17.4 -15.2 -15.2 -9.3 -5.0 -1.1 -9.3
1989 -0.6 -3.2 -9.0 -11.2 -13.8 -18.6 -14.0 -13.4 -9.4 -6.8 -7.7 0.3 -8.9
1990 0.8 -2.2 -6.5 -10.1 -13.8 -19.3 -11.7 -14.3 -15.4 -12.8 -6.0 -0.3 -9.3
1991 -0.1 -1.8 -5.8 -6.6 -15.5 -10.4 -13.0 -10.3 -14.6 -9.7 -3.9 1.2 -7.5
1992 0.5 -2.2 -6.2 -11.3 -16.3 -11.7 -16.0 -12.7 -16.6 -12.6 -6.1 -2.0 -9.4
1993 0.4 -1.1 -7.0 -10.0 -16.8 -17.9 -16.4 -18.3 -15.5 -14.1 -7.1 -2.8 -10.6
1994 -1.6 -2.4 -6.9 -14.0 -17.8 -10.9 -13.5 -18.1 -11.5 -10.3 -5.7 -2.9 -9.6
1995 -2.0 -4.3 -8.0 -12.7 -18.7 -12.8 -10.9 -11.4 -12.3 -13.7 -5.4 -2.5 -9.6
1996 -1.0 -2.6 -5.6 -8.7 -16.2 -15.7 -11.4 -11.4 -12.3 -11.5 -4.1 -0.7 -8.4
1997 0.0 -2.4 -8.0 -12.3 -16.6 -9.7 -16.7 -17.3 -14.8 -13.2 -4.3 -0.3 -9.6
1998 -0.5 -2.7 -9.0 -13.1 -10.7 -14.6 -17.9 -14.6 -17.1 -11.9 -5.1 -0.7 -9.8
1999 -1.4 -3.5 -9.2 -19.3 -17.7 -14.4 -18.9 -15.4 -15.2 -11.6 -6.4 -2.6 -11.3
2000 -1.8 -2.7 -8.2 -15.3 -16.1 -15.4 -13.2 -11.5 -9.3 -13.1 -4.2 -1.0 -9.3
2001 -0.2 -4.5 -4.8 -10.8 -11.1 -15.1 -10.1 -16.2 -11.0 -11.9 -6.4 -2.0 -8.7
2002 0.4 -2.9 -6.1 -8.5 -11.3 -10.7 -12.6 -14.0 -14.0 -12.2 -4.0 -2.1 -8.2
2003 -0.1 -2.2 -6.6 -10.2 -17.1 -17.4 -16.0 -14.2 -13.4 -12.3 -6.1 -1.0 -9.7
2004 -0.7 -1.1 -7.2 -11.1 -14.3 -14.4 -16.6 -12.5 -13.4 -10.5 -6.3 -0.2 -9.0
2005 0.7 -2.0 -7.7 -10.7 -14.9 -13.5 -18.5 -17.4 -12.6 -10.5 -5.6 0.8 -9.3
2006 -0.4 -2.6 -5.8 -7.7 -18.6 -15.0 -12.2 -12.2 -15.0 -12.6 -7.0 -1.4 -9.2
2007 0.1 -2.2 -5.0 -8.1 -12.5 -13.5 -10.9 -13.7 -13.0 -10.2 -4.4 -1.9 -7.9
2008 -1.2 -4.1 -8.1 -9.6 -12.3 -13.5 -12.9 -13.4 -14.6 -13.0 -5.1 -1.3 -9.1
2009 -0.8 -1.6 -5.4 -11.4 -11.3 -12.3 -9.3 -14.8 -10.5 -9.3 -5.8 -1.3 -7.8
2010 1.3 -3.5 -8.0 -14.6 -14.0 -13.1 -15.8 -15.8 -14.1 -11.1 -6.0 -1.7 -9.7
2011 0.8 -3.9 -7.0 -8.3 -16.3 -17.2 -16.4 -12.0 -13.4 -11.0 -6.9 -1.0 -9.4
2012 -1.4 -2.8 -6.7 -10.6 -13.0 -17.1 -17.7 -15.5 -15.2 -9.7 -5.3
The Casey station home page.
The Australian Antarctic Division home page.
The Australian Bureau of Meteorology home page.
The latest synoptic report from Casey station.
This web page was written to look good in MS Explorer 5.0+ using character entity references from HTML 4.0. Apologies if it doesn't quite work for you — anyway the data should be OK. Comments should be addressed to Dr Gareth Marshall at gjma@pcmail.nbs.ac.uk.
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