Grace Su ( license@seawifs.gsfc.nasa.gov) (301) 286-9494
Applicant's Name: Dr. Ichio Asanuma Institution: Earth Observation and Research Center/NASDA Address: TRITON X-23, 1-8-10 Harumi, Chuo-ku, Tokyo 104-6023, Japan Telephone: 81-3-6221-9053 Fax Number: 81-3-6221-9192 E-mail Address: asanuma@eorc.nasda.go.jp Type of Temporary Agreement requested: An agreement that temporarily enables a non-real time SeaWiFS HRPT station to decrypt real-time data and release it to the Authorized Users list. Time period of temporary agreement (3 months maximum). Start Date (month/day/year): 01/08/2003 End Date (month/day/year): 02/18/2003 SeaWiFS HRPT Station to provide data: HMIR (R/V Mirai) 2026 List of Authorized Users to access real-time data. 1. Dr. Ichio Asanuma 2. Dr. Marlon Lewis Project Title: Bio-optical process and primary productivity research along the Equatorial Pacific Principal Investigator(s): Dr. Ichio ASANUMA Funding Agency(s) : JAMSTEC Description of the Research Project and Justification for Real-time SeaWiFS Data: It is our objectives to study the mechanism of the primary productivity on the equatorial Pacific, where the warm water pool shows a very low productivity with the deep chlorophyll maximum, and the equatorial upwelling shows a higher productivity with higher nutrients and a lower chlorophyll-a concentration (HNLC). We will conduct a bio-optical measurement and a primary productivity analysis along the equatorial Pacific by the R/V Mirai. The cruise is scheduled to work on the warm water pool and the equatorial upwelling along the Equator. The research region will be 135E to 160W along the Equator. At stations, we will conduct the bio- optical measurement including a water sampling and analysis on pigments concentration and environmental parameters. And at selected stations, we will conduct the in-situ incubation for 24 hours for primary productivity measurement. In this cruise, we will observe the optical properties of the water using the in-situ spectral irradiance and radiance radiometer, Satlantic Free Fall Radiometer, and analyze the chlorophyll-a concentration in the water. Synchronize to these in-situ observation, we would like to receive the real-time SeaWiFS data to monitor the distribution of chlorophyll-a over the region. It is very important to apply the chlorophyll-a image of SeaWiFS to this study, because of its indication of local upwelling along the Kiribati Islands. This local upwelling was not reported in the previous studies as it was difficult to read the phenomena from the image of sea surface temperature.