| 1 Background
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The Ministry of the Environment installed the facilities
(for receiving and processing data from the satellites ? NOAA, FY-1C
and SeaWiFS) called the Watch System for the Marine Environment
of Northwest Pacific Region in 2001 at the Toyama Prefectural Environmental
Science and Research Center (TESC) in order to support the activities
of the Special Monitoring and Coastal Environmental Assessment Regional
Activity Center (CEARAC).
Recently it has becoming possible to regularly obtain oceanic information
through satellite observation data. There is accordingly the likelihood
of estimating, through ocean color data, the concentration levels
of chlorophyll a, an index of the total amount of phytoplankton
which often generates red tides as a result of proliferation due
to eutrophication. The accuracy of the estimation has been already
validated in the case of the ocean. On the other hand, there is
still room for improvement in the case of coastal waters where are
vulnerable to the river input of earth and sand, and artificial
causes. But as the development of techniques for extracting chlorophyll
a is advancing recently, it is becoming feasible to estimate the
concentration levels of suspended solid (SS) and colored dissolved
organic matters (CDOM), too. |
2 Purpose of the project
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The project aims at developing algorithm for conducting
a precise measurement of chlorophyll a, SS and CDOM through remote
sensing in Toyama Bay as a model sea water area. Also it aims at
showing the effectiveness of remote sensing as a monitoring technique
of the marine environment to NOWPAP member countries. |
3 Outline of the project
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The project is to be conducted over three years (starting
in 2003) with the cooperation of the Toyama Prefectural Environmental
Science and Research Center, the Toyama Prefectural Fishery Institute,
Nagasaki University and Toyama University.
1) Monitoring by sampling
To obtain Sea Truth Data, NPEC and Toyama University regularly conduct
water sampling and on-the-spot measuring aboard the Hayatsuki and
Tateyama-maru, the survey boats owned by the Toyama Prefectural
Fishery Institute while TESC and Toyama University analyzes some
parameters.
〔survey points〕7 points off Himi, Jintsugawa, Sinminato(2), Namerikawa
and Kurobe, the center of the bay (1) and outer bay (1).
〔frequency〕12 times (once a month)
〔parameters〕＜climate observation＞ temperature, humidity, cloud amount,
wind direction and wind velocity ＜measuring on board＞ pH, water
temperature, transparency and ocean color degree, and reflectance,
irradiance and radiance (measured by the profiling reflectance radiometer)
＜analysis at laboratory＞ chlorophyll a, dissolved oxygen (DO), SS,
and CDOM by TECS, and dissolution type - wise phosphorus by Toyama
University
2) Monitoring and processing ocean color data
To develop the algorithm for estimating chlorophyll a, SS and CDOM
in Toyama Bay, Nagasaki University processes ocean color data obtained
through MODIS, ADEOSⅡ, SeaWiFS, etc. and NPEC processes ocean color
data concerning SST, turbidity, etc. through the Watch System for
the Marine Environment of Northwest Pacific Region |
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