Deng, Xiaoli and Gharineiat, Zahra and Andersen, Ole B. and Stewart, Mark G. (2016) Observing and modelling the high water level from satellite radar altimetry during tropical cyclones. In: Proceedings of the 2013 IAG Scientific Assembly, Postdam, Germany, 1–6 September, 2013, 1–6 September, 2013, Postdam, Germany.
Abstract
This paper investigates the capability of
observing tropical cyclones using satellite radar
altimetry. Two representative cyclones Yasi
(February 2011) and Larry (March 2006) in the
northeast Australian coastal area are selected based
also on available tide gauge sea level measurements.
It is shown that altimetry data can capture high water
levels induced by Larry and Yasi through a careful
re-processing and re-editing of the data. About 18
years of data from multi-satellite altimetry missions
including TOPEX/Poseidon, Jason-1 and Jason-2,
and seven tide gauges around the northern
Australian coast are integrated using a multivariate
regression approach. The results reveal that the
multi-regression model can, in general, explain
>60% of sea level variances in the study area. The
model is then validated using independent data from
tide gauge in Townsville. The comparison results
indicate that the high sea levels predicted by the
model taken into account of both altimetry and tide gauge
data agree well with those observed at
Townsville during cyclone Larry.
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