Southern Hemisphere Teleconnection Patterns and Their Relation to Australian Hydroclimatic Variation: Potential Precipitation and Streamflow Long-Range Forecasting
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Date
2002Author
Hidalgo León, Hugo G.
Dracup, John A.
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An exploratory analysis of the relationship between Southern Hemisphere’s (SH) atmospheric/oceanic
variables and streamflow and precipitation variation in Australia is presented. A 2.5o
x2.5o
gridded data of
700mb geopotential heights (Z700) for the SH, obtained from the US National Center for Environmental
Prediction and the National Center for Atmospheric Research, (NCEP-NCAR reanalysis), were used to
characterize the atmosphere. A rotated principal component analysis of the data identified the principal
modes of variability. The trends observed in the Annular and Tropical Influence modes from 1948 to 2000
suggest increased pressures in mid-latitudes and lower pressures in the tropics. The causes behind these
trends are unknown and require more research. It is expected that our study will show significant links
between circulation and oceanic patterns and hydroclimatic variation in Australia. The final objective of this
ongoing study is to provide a basis for long-range precipitation and streamflow forecasts throughout Australia
Hidalgo, Hugo G and Dracup, John A. Southern Hemisphere Teleconnection Patterns and Their Relation to Australian Hydroclimatic Variation: Potential Precipitation and Streamflow Long-Range Forecasting [online]. In: Water Challenge: Balancing the Risks: Hydrology and Water Resources Symposium 2002. Barton, A.C.T.: Institution of Engineers, Australia, 2002: [534]-[539]. Availability: <http://search.informit.com.au/documentSummary;dn=321935772823066;res=IELENG> ISBN: 0858257785. [cited 31 May 17].
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