Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (1): add | show Print this page

one publication added to basket [210297]
Mapping coral-algal dynamics in a seasonal upwelling area using spaceborne high resolution sensors
Pauly, K.; Goossens, R.; De Clerck, O. (2011). Mapping coral-algal dynamics in a seasonal upwelling area using spaceborne high resolution sensors, in: Lacoste-Francis, H. (Ed.) (2010). Proceedings of ESA Living Planet Symposium 28 June – 2 July 2010 Bergen, Norway. ESA Special Publications, 686: pp. 8
In: Lacoste-Francis, H. (Ed.) (2010). Proceedings of ESA Living Planet Symposium 28 June – 2 July 2010 Bergen, Norway. ESA Special Publications, 686. European Space Agency: [s.l.]. ISBN 978-92-9221-250-6. , more
In: ESA Special Publications. ESA Publications Office. ISSN 0379-6566; e-ISSN 1609-0438, more

Available in  Authors 

Keyword
    Marine/Coastal

Authors  Top 

Abstract
    PROBA/CHRIS is one of the first satellite sensors to offer both high spatial and spectral resolutions. We explored the potential of this sensor to map the dynamics of seaweed and coral cover in an area influenced by seasonal upwelling in the Arabian Sea. Quantitative field assessments coincided with image acquisitions. After removal of sensor noise and atmospheric effects, maximum likelihood supervised classification yielded a tau accuracy of 64.09 for the summer monsoon dataset. Clearer waters and a lower spatial heterogeneity in the winter monsoon dataset resulted in a tau accuracy of 71.45. Post-classification comparison and vegetation indices illustrated the conspicuous turnover from dense macroalgal stands covering nearly all coral communities during summer to bare rock or turf communities during winter, with coral becoming the predominant bottom type. These results were further analysed using a novel maximum entropy sub-pixel approach and were shown to consistently outperform results from Landsat 7 ETM+ imagery.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors