Locality of Chlorophyll-A Distribution in the Intensive Study Area of the Ariake Sea, Japan in Winter Seasons based on Remote Sensing Satellite Data

Kohei Arai

doi:10.14569/ijarai.2015.040803

Abstract

Mechanism of chlorophyll-a appearance and its locality in the intensive study area of the Ariake Sea, Japan in winter seasons is clarified by using remote sensing satellite data. Through experiments with Terra and AQUA MODIS data derived chlorophyll-a concentration and truth data of chlorophyll-a concentration together with meteorological data and tidal data which are acquired for 6 years (winter 2010 to winter 2015), it is found that strong correlation between the chlorophyll-a concentration and tidal height changes. Also it is found that the relations between ocean wind speed and chlorophyll-a concentration. Meanwhile, there is a relatively high correlation between sunshine duration a day and chlorophyll-a concentration. Furthermore, it is found that there are different sources of chlorophyll-a in the three different sea areas of Ariake Sea area in the back, Isahaya bay area, and Kumamoto offshore area.

Highlights

The Ariake Sea is the largest productive area of Nori (Porphyra yezoensis1) in Japan
Through experiments with Terra and AQUA MODIS data derived chlorophyll-a concentration and meteorological data and tidal data which are acquired for 6 years, it is found that strong relation between the chlorophyll-a concentration and tidal height changes
It is found that the relations between ocean wind speed and chlorophyll-a concentration

Summary

INTRODUCTION

The Ariake Sea is the largest productive area of Nori (Porphyra yezoensis1) in Japan. The resultant lack of nutrients has suppressed the growth of “Nori” and lowered the quality of “Nori” products due to bleaching with the damage of the order of billions of yen [3] This bloom had been firstly developed at the eastern part of the Ariake Sea. as the field observation is timeconsuming, information on the developing process of the red tide, and horizontal distribution of the red tide has not yet been clarified in detail. Almost every year, relatively large size of diatoms of Eucampia zodiacus appears in Ariake Sea areas. The algorithm is applied to MODIS data for a trend analysis of chlorophyll-a distribution in the Ariake Sea area in winter during from 2010 to 2015 is made.

METHOD AND PROCEDURE

CONCLUSION