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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 8
Nat. Hazards Earth Syst. Sci., 14, 1999–2008, 2014
https://doi.org/10.5194/nhess-14-1999-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Nat. Hazards Earth Syst. Sci., 14, 1999–2008, 2014
https://doi.org/10.5194/nhess-14-1999-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 06 Aug 2014

Research article | 06 Aug 2014

Chlorophyll increases off the coasts of Japan after the 2011 tsunami using NASA/MODIS data

E. Sava, B. Edwards, and G. Cervone E. Sava et al.
  • GeoInformatics and Earth Observation Laboratory, Department of Geography and Institute for CyberScience The Pennsylvania State University, University Park, PA 16802, USA

Abstract. Large chlorophyll anomalies are observed after the 2011 Japanese tsunami using the NASA MODIS instrument onboard the TERRA and AQUA satellites. These anomalies are observed both along the eastern coast of Japan, where the tsunami wave hit with maximum force, and in the deep water surrounding the epicentral region. Although both satellites show agreeing spatio-temporal patterns, larger anomalies are detected using the AQUA satellite. A temporal analysis shows increased chlorophyll concentrations immediately after the tsunami, and higher values are observed for nearly one month before reversing to pre-tsunami levels.

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