 Annual Mean Cloud Cover
Observations of total cloud amount from a number of stations
throughout Australia have been used to
examine changes in Australian mean annual cloud cover since 1957.
The data used has been adjusted for inconsistent observation practices
and also time of observation bias due to the introduction of
daylight saving time.
Australian annual mean cloud cover generally shows an increase until
the mid-1970s, followed by a weak drop.
This decline is consistent with an increased number of
El Niño events in recent years.
Further details:
Henderson-Sellers, A. (1992).
Continental cloudiness changes this century.
GeoJournal, 27.3, 255-262.
Jones, P.A. and Henderson-Sellers, A. (1992).
Historical records of coudiness and sunshine in Australia.
Journal of Climate, 5, 260-267.
Plummer, N., Nicholls, N., Lavery, B.M., Leighton, R.M. and Trewin, B.C. (1997).
Twentieth century trends in Australian Climate Extremes Indices.
In: CLIVAR/GCOS/WMO Workshop on indices and indicators
for climate extremes, Asheville, NC, USA, 3-7 June 1997.
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