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Rainfall estimation in south west Tasmania using satellite images and phytosociological calibration

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Nunez, M and Kirkpatrick, JB and Nilsson, C (1996) Rainfall estimation in south west Tasmania using satellite images and phytosociological calibration. International Journal of Remote Sensing, 17 (8). pp. 1583-1600.

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Abstract

NOAA AVHRR digital data are used to map precipitation in southwest Tasmania, Australia. The technique uses multiple linear regression analyses between precipitation and satellite data to obtain yearly and seasonal averages over a three-year period. These maps are later transformed into long term average maps by drawing on linear relations between 3-year and long term averages for various precipitation stations in the study area. Rms model residuals (measured-model) range from 0.45 mm day[-1] for the summer regression to 1.20 mm day[-1] for the winter regression. A significant fraction of this error may be attributed to limitations in the rain gauge measurements. The predicted precipitation is further verified by reference to variation in the alpine floras of the study area which have a known relationship with soil conditions that vary with precipitation. Single axis ordination scores for the floras show strong relationships with predicted precipitation both on a seasonal and annual basis, especially in subsets related to substrate and region.

Item Type: Article
Keywords: atmospheric precipitation ; Parameter estimation ; calibration ; Satellite observation ; Long term ; Summer ; Winter ; Linear regression ; Multiple regression ; rainfall ; Rain gauge ; imagery ; Tasmania ; Australia ; Australasia
Journal or Publication Title: International Journal of Remote Sensing
Page Range: pp. 1583-1600
Identification Number - DOI: 10.1080/01431169608948724
Additional Information: The definitive version is available online at http://www.informaworld.com/
Date Deposited: 05 Sep 2007
Last Modified: 18 Nov 2014 03:22
URI: http://eprints.utas.edu.au/id/eprint/1838
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