Developing a two-step method for detecting red tide in East China Sea using MERIS data

Xiaohui Xu

doi:10.1117/12.2532984

14 October 2019 Developing a two-step method for detecting red tide in East China Sea using MERIS data

Xiaohui Xu

Proceedings Volume 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019; 111501E (2019) https://doi.org/10.1117/12.2532984
Event: SPIE Remote Sensing, 2019, Strasbourg, France

Abstract

Red tide is an ecological anomaly that phytoplankton in seawater suddenly proliferation or aggregation under certain environmental conditions and within a period of time, resulting in seawater discoloration. Red tide not only endangers marine fisheries and aquaculture, deteriorates the marine environment, affects coastal tourist industry, but also causes human health problems. East China Sea (ECS) is a high incidence region of red tide disasters. Remote sensing is an effective means of monitoring red tides. In this paper, the high-incidence area of the red tide in the East China Sea is selected as the study area, MERIS L2 data is used as the data source to analyze and compare the normalized water radiation (nlw) spectral difference between the red tide water body and the non-red tide water body in the red tide event. Based on the spectral difference, this paper develops nlw560/nlw490>1.25 and nlw681-nlw665>0 algorithm to extract the red tide information of ECS. Applying the algorithm to ECS, the results show that the developed model can effectively determine the location of the red tide and correspond well with the results of the official bulletin. This indicates that the algorithm can effectively extract red tide information.

Citation Download Citation

Xiaohui Xu "Developing a two-step method for detecting red tide in East China Sea using MERIS data", Proc. SPIE 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019, 111501E (14 October 2019); https://doi.org/10.1117/12.2532984

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KEYWORDS

Water

Algorithm development

Remote sensing

Luminescence

Ocean optics

Oceanography

Sensors

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