Temperature Monitoring Station:
GREAT DUCK ISLAND (AUT), ONT

Monthly Mean Temperature Data

Raw Data relative to Expected Monthly Means

Difference from Regional Expectation

Breakpoint Adjusted Annual Average Comparison

Mean Rate of Change ( °C / Century )

Raw monthly anomalies		3.51
After quality control		1.39
After breakpoint alignment		0.60
Regional expectation during same months		2.45 ± 0.76
National average during same months		2.69 ± 0.33
Global land average during same months		2.73 ± 0.20

Regional Consistency

Comparison of monthly mean station data to regional expectation

	Typical Difference (°C, 95% range)	Correlation (R value)
Raw Monthly Anomalies	± 4.2	0.65
After Quality Control	± 3.3	0.71
After Breakpoint Adjustment	± 3.4	0.69

Quality Control Summary

Months missing 10 or more days	25
Serially repeated daily or monthly values	22
Extreme local outliers	4
Regional climatology outliers	5
Abrupt jumps	0
Marked as bad or manually changed by source	0
Exceeds global climatological range	0
Isolated observations	4
Frame shift repetitions	0
TMAX / TMIN inconsistency	0
TAVG outside TMAX / TMIN range	0
Total Observations Rejected by Quality Control	39

Station ID Codes

FAA	WNL
GSOD	714620-04812
GSOD	714620-99999
ICAO	CWNL
NCDC	20028714
USAF	714620
WBAN	4812
WMO	71462

ID codes may be repeated if the identification of the station changed during its history or if two different records were found to contain the same data, in which case the records would be merged.