Page 614 |
Federation and Meteorology |
|||
Table of Contents
Seventy-Five Years at Willis Island Preface Foreword Chapter 1: Willis Island Today Chapter 2: Willis Island is Conceived Chapter 3: Willis Island is Born Chapter 4: The Early Years Chapter 5: Life in the 1930s Chapter 6: Willis Island at War (194142) Chapter 7: After the War Chapter 8: Willis Island1960s Style Chapter 9: The Value of Willis Island Chapter 10: The Original Inhabitants Appendix 1: Willis Island Milestones Appendix 2: Willis Island Officers Appendix 3: Log of Willis Island Observations, December 1922 Appendix 4: References Index Search Help Contact us |
Chapter 9: The Value of Willis Island Since the weather station on Willis Island was established, observations have helped in detecting or establishing the position, movement or intensity of tropical cyclones. In the early years the basic Willis observations assisted in establishing the existence and intensity of tropical disturbances. In later years, with radiosonde, the structure and a better estimate of intensity have been possible. More recently the weather watch radar has enabled tracking to establish a more accurate movement thus giving a better coastal crossing prediction. Today routine upper air observations from Willis Island during the cyclone season help determine the location, structure and tendency of upper trough systems in the Coral Sea. These are critical to the motion and intensity changes of tropical cyclones.
The following is a sample of the more notable occasions when observations from Willis Island contributed to the tropical cyclone warning service:
This short list of events alone substantiates the need for the station and justifies the foresight of Capt King and Mr Poynton. However, the station has proved useful in areas other than assistance in tropical cyclone detection and monitoring. Willis Island observations of 17 December 1989 showed ex-tropical cyclone Felicity 1991 showed hurricane force winds associated with Tropical Cyclone Kelvin, a system that had appeared to be sheared and weak. The data collected from Willis Island in both these events has since been used to identify a certain type of destructive hybrid storm. One of these hybrid storms, Tropical Cyclone Beth, caused widespread damage in the Bundaberg area in 1976 without any warning. This research will help to provide early warning of future similar events. The observations from Willis Island that have been recorded provide a climatology of a maritime trade wind environment that is of international significance. The continuous record of surface observations since 1921, upper winds since 1927 and upper temperatures since 1960 is more comprehensive than any such maritime record in the world.
© Online Edition Australian Science and Technology Heritage Centre and Bureau of Meteorology 2001 Published by Australian Science and Technology Heritage Centre, using the Web Academic Resource Publisher http://www.austehc.unimelb.edu.au/fam/0614.html |