precipitation delivery trajectories associated with extreme river flow for the waitaki river, new zealand
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ID: 164959
2015
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Abstract
Analysis of large-scale climate conditions associated with extreme river
flow is an important first step in the development of predictive
relationships for such events. The potential of this approach is
demonstrated here for the Waitaki River (a river of national importance in
terms of electricity generation), in the Southern Alps of New Zealand. Here,
atmospheric circulation anomalies and air parcel trajectories associated
with such events are investigated for the period 1960–2010, using the
NCEP/NCAR reanalysis and HYSPLIT trajectory model. Results show that
atmospheric circulation variation and air parcel trajectories associated
with extreme high Waitaki river flow events typically follow two distinct
patterns. These patterns are associated with differences in both New
Zealand- and hemispheric-scale atmospheric circulation, but all occur under
a similar pattern of monthly average pressure anomalies. As such, the
results indicate that different precipitation generation mechanisms are
captured by a single monthly climate anomaly pattern – providing
substantial new understanding of the cascade of processes linking
atmospheric to surface hydrological variation in the Southern Alps, and
pointing the direction for future process-informed research on sources of
predictability for Waitaki river flow.
| Reference Key |
kingston2015proceedingsprecipitation
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|---|---|
| Authors | ;D. G. Kingston;J. McMecking |
| Journal | gruppe interaktion organisation zeitschrift fur angewandte organisationspsychologie |
| Year | 2015 |
| DOI |
10.5194/piahs-369-19-2015
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| URL | |
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