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Title Transcription
MODIS データ ヲ モチイタ ナカウミ ノ アカシオ モニタリング 2004 ネン
Title Alternative (English)
Monitoring red tide blooms in Lake Nakaumi, using MODIS data 2004
File
language
jpn
Author
Sakuno, Yuji
Ehara, Ryo
Kunii, Hidenobu
Description
The MODIS satellite ocean-color sensor, launched in 1999 and again in 2002, has observed the ocean color twice a day. Originally designed to examine plankton and terrestrial vegetation, this sensor is highly sensitive(Quantization: 12 bits). In addition, the sensor has a maximum resolution of 250 m, exceeding the resolution of other, conventional, ocean-color sensors. For Lake Nakaumi, it was assumed that outlines of a red tide would be discernable with a maximum resolution of 250 m. The research incorporated daily MODIS data from April to June 2004, mainly acquired from the Institute of Industrial Science, the University of Tokyo. The red-tide distribution within the lake was determined by comparing the image data with insitu data. As a result, the radiance of MODIS Band 1(620-670 nm)and surface concentration of chlorophyll-a(Chl-a)during the red tide in the lake were strongly correlated(r^2=0.84). Moreover, the area of water where MODIS Chl-a was very high(more than 40μg/l,overlapped the area of red tide as observed from a research vessel. We suggest that MODIS data(250 m resolution mode)are effective to investigate the distribution of future red tides in the lake.
Subject
Red tide bloom
Lake Nakaumi
MODIS
Journal Title
Laguna : 汽水域研究
Volume
12
Start Page
37
End Page
44
ISSN
21852995
Published Date
2005-06
NCID
AN10439529
Publisher
島根大学汽水域研究センター
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Estuary Research Center
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