Meeting Minutes

Session: Ocean: OCTS Team, ADEOS-Ocean Biology and GLI-Ocean Group Joint Workshop

December 7, 1999 (9:10-17:55)

Room: E

 

 

 

Agenda


  1. Opening Remarks, H. Fukushima, T. Saino and M. Kishino
    ----- ADEOS/OCTS Status Report-----
  2. Current Status of the OCTS Project, H.Kawamura and Y. Kato
  3. OCTS Version 4: Algorithms, Calibration and Validation, M. Shimada, A. Mukaida and Y. Mitomi
  4. Evaluation of OCTS Level-3 Products, H. Murakami
  5. Future Plan to Reprocess OCTS Data, H. Kawamura and H. Fukushima
    ----- Presentations I -----
  6. Overview of the SIMBIOS Project, G. Fargion
  7. Vicarious Calibration of OCTS, MOS and POLDER, B. Franz
  8. Latest Results on the Validation of POLDER Ocean Color Products and Comparison of OCTS and POLDER Products, P. Deschamps
  9. Detection Scheme for Asian Dust Aerosol over Satellite Ocean Color Data, H. Fukushima and M. Toratani
  10. Results on the Detection and Correction of Absorbing Aerosols for Ocean Color Using POLDER Data, P. Deschamps
  11. Variability of Chlorophyll and CDOM Concentration in the California Current, B. Greg Mitchell and M. Kahru
  12. Variations in Algal Biomass and Primary Production in the Mediterranean Basin: First Results from OCTS, POLDER and SeaWiFS Observations, A. Bricaud, E. Bose, D. Antoine and A. Morel
    -----Presentations II-----
  13. Inverse Modeling of Radiance Reflectances for Deriving SPM Concentrations in Coastal Waters from OCTS Data, R. Doerffer, H. Schiller and M. Kishino
  14. Comparison of Remotely-Senses Ocean Colour Data with Shipborne Observations of Biophysical Parameters, A. Jolly, M. Srokosz, P. Cipollini and H. Snaith
  15. Operational Ocean Colour Processing for the Assessment of Water Quality along the European Coasts, N. Hoepffiner, A. Dowell and P. Schlittenhardt
  16. OTCS-Derived Chlorophyll-a Concentration and Oceanic Structure in the Kuroshio Frontal region Off the ShoreJoban/Kashima Coast of Japan, K. Yokouchi, K. Takeshi, I. Matsumoto, G. Fujiwara, H. Kawamura and K. Okuda
  17. Interannual Variability in the Optical Characteristics of the Equatorial Pacific: Consequences for the Upper Ocean Heat Budget, M. Lewis and I. Asanuma.
  18. Phytoplankton Bloom Off the Lombok Strait Observed by OCTS and SeaWiFS, I. Asanuma, K. Matsumoto, T. Kawano and M. Lewis
  19. Estimation of Primary Production with OCTS Data, J. Ishizaka, T. Kameda and H. Murakami
  20. Evaluation of Regional and Temporal Variabilities of Primary Productivity in the Sub-Arctic and Arctic North Pacific Ocean using ADEOS/OCTS, Sei-ichi Saito and K. Sasaoka
    -----Presentations III-----
  21. Seasonal Changes in OCTS-Chlorophyll Concentrations in the Atlantic in relation to Mixed Layer Depth, J. Yoder
  22. Observations of Rossby Waves in Global Ocean Colour Datasets, P. Cipollini, P. Challenor, and S. Raffaglio
  23. Validation of Chlorophyll-a Concentration in the Southern Ocean from OCTS and SeaWiFS Data, T. Hirawake and M. Fukuchi
  24. OCTS-Derived Phytoplankton Pigment Distribution in Antarctic Ocean during Austral Spring, K. Mahapatra, Y. Okada and S. Matsumura
  25. Seasonal Variation of Chlorophyll-a in the Gulf of Thailand Using ADEOS/OCTS Data, A. Siripong
  26. Variability of the Biological and Physical Processes in the Ocean by ADEOS/OCTS and NSCAT Data During November 1996 to June 1997, A. Siripong
  27. Application of Satellite ADEOS /OCTS Japanese Fisheries, H. Tameishi, K. Saito, K. Takahashi and H. Nakasono
  28. Sea Surface Temperature from Multi-Sensor Data in Relation to Fish Forecasting, S.B. Mansor, K. Jusoff and M. I. Mohamed
  29. Numerical Simulation of Northward Migration of Spring Bloom in the Japan Sea, T. Yanagi
Chair Persons: Dr. Kawamura (9:10-10:15), Dr. Fukushima (10:30-12:05) Dr. Saino (13:30-15:20) and Dr. Asanuma (16:00-17:55)

1. Opening Remarks: Agenda of the Day

Summary of Presentations and Major Discussions

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2. Current Status of the OCTS Project

Presented by Dr. Kawamura
  • Dr. Kawamura presented the current status of the OCTS project. His presentation included the organization of the project team, current status, an overview of the instruments and so forth. JAXA is developing I-Lac and MEAS so that the satellite data can be processed from personal computers.
Questions and Answers
Q: Is the Coastal Program new in Japan, and do you plan to continue it after the closure of OCTS mission? (Roland Doerffer/ GKSS Germany)
A: Yes, except the OCTS River Project, which is only conducted in Asia.

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3. OCTS Calibration and Validation

Presented by Dr. Shimada (Cal) and Mr. Akira Mukaida of RESTEC (Val)
  • Dr. Shimada explained OCTS version history and its change of contents. CAL factor information can be obtained from EORC web sites. The summary of Version 4 product will be distributed at the end of the session.
  • Mr.Mukaida explained the Version 4 validations for nLw, Chl-a and SST. NLw and Chl-a demonstrated improvement for high concentration, but SST has no changes since Version 3.
Questions and Answers
Q: Do you have any problem with negative water-leaving radiance? (Dr. Janet W. Campbell, University of New Hampshire)
A: Yes, we do. (Dr.Fukushima, Tokai University)
Q: Binning algorithm for vegetation index was only for the vegetation index or not? (Campbell)
A: It's only for vegetation index and not for other oceans color. Dr.Fukushima

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4. Evaluation of OCTS Level-3 Products

Presented by Dr. Murakami
  • Dr. Murakami discussed the changes that occurred through the updating of Version 3 to 4. As for the validation of Chl-a, Chl-a global data generally agrees with the ground observation data except for some areas such as coastal regions. In global comparison with SeaWiFS data, Chl-a, nLw565 and 555 are usually in positive correlation. In long-term, nLw seems to decrease through the observation period. He remarked that more analysis on VNI and TI calibrations is necessary.
Questions and Answers
Q: Do you have plans for a Southern Ocean region algorithm for OCTS? (Dr. Greg Mitchell)
A: Yes.
Q: What is the time schedule for Version 5.0? (Mitchell)
A: JAXA is currently working on it and will release it in the near future.
  • Dr. Bryan Franz of NASA commented that the SIMBIOS project does not observe the decreasing trends like SeaWiFS does.
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5. Future Plan to Reprocess OCTS Data

Presented by Dr. Kawamura and Dr. Fukushima
  • Dr. Kawamura gave an overview on the characteristics of JAXA Ocean Observation System (NOOS). Dr. Fukushima explained the issues of concern regarding OCTS Version 4 products and algorithm. He proposed algorithm updates.
Questions and Answers
Q: What time scale do you have in mind for Version 5 processing and Asian Water? (Dr. Greg Mitchell, USCD/SIO)
A: JAXA Archive will finish soon, and then, Dr. Fukushima will work on Version 5. Version 5 will start next fiscal year, maybe in April. For Global one, it will take longer. (Dr. Kawamura)

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Presentations I

6. Overview of the SIMBIOS Project

Presented by Dr. G. Fargion, Assistant Project Manager of SIMBIOS Project
  • Dr. Fargion provided general information on the SIMBIOS project. The presentation included the background, objectives, organization activities, and various NASA support available to the SIMBIOS PIs. Dr. Fargon emphasized that the next due date for the presentation is due on January 30, 2000. The contact information is listed on the slide.
Questions and Answers
None

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7. Vicarious Calibrations of OCTS, MOS and POLDER

Presented by Dr. B. Franz
  • Dr. Franz summarized the various calibrations of OCTS, MOS and POLDER. He provided thorough explanations on the SeaWiFS-MOS-OCTS-POLDER intercalibration system and the vicarious calibration of each instrument.
Questions and Answers
None

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8. Latest Results on the Validation of POLDER Ocean Color Products and Comparison of OCTS and POLDER

Presented by Dr. P. Deschamps
  • Dr. Deschamps gave a presentation on his research on the above topic. He showed a comparison of OCTS V4 and POLDER V15.10 products. He also compared OCTS & POLDER vs. In-Situ Measurements of Pigment Concentration C Level 3 data.
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9. Detection Scheme for Asian Dust Aerosol over Satellite Ocean Color Data

Presented by Dr. Fukushima and Dr. Toratani
  • Dr. Fukushima and Dr. Toratani gave a summary of the above research subject. Dr. Fukushima gave an overview of the study. His discussion included the definition of dust index, and showed dust index images from SeaWiFS.
  • Dr. Toratani showed OCTS dust index images in comparison with TODR dust index images. He concluded that the spatial distribution of empirical dust index showed agreement with observation of meteorological stations and lidar stations, TODR. aerosol index and dust transport model.
Questions and Answers
Q: ( Dr. Franz) Is " Dust index " good representation for dust from the physical meaning ?
A: We will test more and improve "Dust index"

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10. Results on the Detection and Correction of Absorbing Aerosols for Ocean Color using POLDER Data

Presented by Dr. Deschamps
  • Dr. Deschamps summarized the result of the above research. He used the color satellite images of North Africa and Mediterranean Sea as a sample.
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11. Variability of Chlorophyll and CDOM Concentration in the California Current

Presented by Dr. Greg Mitchell
  • Dr. Mitchell gave a summary of the above research subject. The conclusion of the research shows the satellite time-series for Chl and CDOM from 11/98 to present, large variance at all time scales from 1 week-interannual, seasonal trends are significant for some sub-regions, large El-Nino signal, and the tendency for increasing CDOM and Chl over last 3 years.
Questions and Answers
Q: ( Dr. Janet Campbell ) You used water-leaving radiance to derive Chl and CDOM?
A: Yes.
Q: How consistent is OCTS water-leaving radiance compared to SeaWiFS? (Campbell)
A: Pretty consistent. We feel reasonably confident in 455 and 445. (Mitchell)

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12. Variations in Algal Biomass and Primary Production in the Mediterranean

Basin: First Results from OCTS POLDER and SeaWiFS Observations.
Presented by Dr. Annick Bricaud
  • Dr. Bricaud presented the objectives of the present study, and how primary production was computed and mean primary production among different data sets. She also explained issues related to an estimate of new production and presented a modified approach. However, she noted that the present results are still preliminary. She is waiting for the improved versions of level 3 products. She discovered that OCTS and SeaWiFS Chl products are in relatively consistent agreement except in oligotrophic waters where SeaWiFS values might be overestimated.
Questions and Answers
Q: How large is your production relationship? Do you only use constant per production? (Doerffer)
A: Yes.

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Presentations II

13. Inverse Modeling of Radiance Reflectances for Deriving SPM Concentrations in Coastal Waters from OCTS Data.

Presented by Dr. Ronald Doerffer, GKSS Research Center
  • Dr. Doerffer gave a summary on the above research. He discussed the atmospheric correction over turbid water using neural network, and presented the preparation and operation of NN (Neutral Network) Atmospheric Correction Algorithm. In conclusion, the test data indicated that correction is possible even over turbid river plumes.
Questions and Answers
None

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14. Comparison of Remotely-Sensed Ocean Color Data with Shipborne Observations of Biophysical Parameters

Presented by Dr. Anne Jolly, Southampton Oceanography Center
  • Dr. Jolly gave a presentation on the description of RRS Discovery Cruise 227m its objectives, the survey results and analysis.
Questions and Answers
Q: How would you use the satellite data to determine the biomass of zooplankton? (Campbell)
A: We look whether the features are evaded throughout the region and also initialize Herbert and Hopps model.

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15. Operational Ocean Color Processing for the Assessment of Water Quality along the European Coasts

Presented by Dr. P. Schlittenhardt, Space Applications Institute
  • Dr. Schlittenhardt gave a thorough overview of ocean color data processing at Marine Environment Unit.
Questions and Answers
None

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16. OCTS-Derived Chlorophyll-a Concentration and Oceanic Structure in the Kuroshio Frontal Region off the Joban/Kashima Coast of Japan

Presented by Dr. Yokouchi
  • Dr. Yokouchi summarized his study on OCTS-derived Chl-a concentration and oceanic structure in the Kuroshio frontal region off the coast of Japan.
Questions and Answers
None

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17. Interannual Variability in the Optical Characteristics of the Equatorial Pacific:Consequences for the Upper Ocean Heat Budget

Presented by M. Lewis of Dalhousie University
  • Dr. Lewis summarized his research on the above topic. The result of the research shows an algorithm largely developed for more eutrophic environments, do work in the "celar" eutrophic regions.
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18. Phytoplankton Bloom off the Lombok Strait Observed by OCTS and SeaWiFS

Presented by Dr. Kawano
  • Dr. Kawano presented a summary of the above research. He discovered that seasonal wind maintains a distribution of Phytoplankton. He also noted that irregular wind for some period determines a distribution of Phytoplankton. Also, the runoff from the Lombok strait scatters in the surface layer withholding a Phytoplankton boom.
Questions and Answers
None

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19. Estimation of Primary Production with OCTS Data

Presented by Joji Ishizaka
  • Dr. Ishizaka summarized the estimation of the primary production with OCTS data.
Questions and Answers
Q: How accurate do you need the temperature?
A: We use OCTS temperature for OCTS processing, and Reynold temperature for SeaWiFS Processing. OCTS is a bit underestimated than SeaWiFS The higher Chlorophyll region is more important.

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20. Evaluation of Regional and Temporal Variabilities of the Primary Productivity in the Sub-Arctic and Arctic North Pacific Ocean Using ADEOS/OCTS

Presented by Dr Sei-ichi Saito Dr. Sei-ichi Saito gave a summarized presentation on his research, which focused on the Fukuoka Bay Area and Off Sanriku Area. The following are some of his findings.
  • Spring Bloom in Fukuoka bay and adjacent waters in 97 were observed using OCTS/AVHRR and synoptic ship observations.
  • It was also in and around Kuroshio warm core rings in 1997 and observed via the same method.
Questions and Answers
None

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Presentations III

  • Dr.Lewis invited participants to OCEAN OPTICS XV in October 2000 in Monaco.

21. Seasonal Changes in OTCS-Chlorophyll Concentrations in the Atlantic in Relation to Mixed Layer Depth

Presented by Dr. J. Yoder
  • Dr. Yoder presented the summary of his research on the above topic. He remarked that the wind deters and Chl modes are related in the Atlantic, OCTS and POLDER show seasonal cycle with some inter-sensor difference and the seasonal Chl max co-occurs
Questions and Answers
None

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22. Observations of Rossby Waves in Global Ocean Color Datasets

Presented by Dr. Ann Jolly on behalf of Dr. Paul Cipollini and others
  • According to Dr. Cipollini's research, Rossby Waves are very important phenomena in ocean dynamics and climate studies.
Questions and Answers
Q: Why are the detections by OCTS and SeaWiFS different? (Dr. Yanagi, University of Kyushu)
A: I don't know.
Comments from Dr. Kawamura:
OCTS period is very short so maybe it is providing some error in estimating a long-term phenomenon.

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23. Validation of Chlorophyll-a concentration in the Southern Ocean from OCTS and SeaWiFS Data

Presented by Dr. Hirawake
  • Dr. Hirawake summarized his research on the validation of Chl-a concentration in the Southern Ocean from OCTS and SeaWiFS data. He pointed out the problem in the ocean color remote sensing. He analyzed comparisons between Ocean Color Chl-a and in situ Chl-a, and between ocean color sensors.
Questions and Answers
Q: Did you calculate the Chlorophyll just by applying the conversion of percentage differences or calculate by algorithms? (Mitchell)
A: Bio-optical is the standard algorithm.
Dr. Mitchell and Dr. Hirawake will further discuss this matter later.

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24. OCTS-derived Phytoplankton Pigment Distribution in Antarctic Ocean during Austral Spring

Presented by Dr. Mahapatra
  • Dr. Mahapatra explained his research on the above topic.
Questions and Answers None

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25. Seasonal Variation of Chl-a in the Gulf of Thailand Using ADEOS-OCTS Data

Presented by Dr. Siripong of Chulalongkorn University
  • Dr. Siripong presented her research on the above topic. The study focuses on North East and SouthWest Monsoon Seasons. This study will benefit the local fisheries.
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26. Variability of the Biological and Physical Processes in the Ocean by ADEOS/OCTS and NSCAT Data During November 96 to June 97

Presented by Dr. Siripong
Questions and Answers
None

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27. Application of Satellite ADEOS/OCTS Japanese Fisheries

Presented by Dr. Tameishi, Japan Fisheries Information Center
  • Dr. Tameishi summarized his study on the application of satellite ADEOS/OCTS to Japanese fisheries. He finds that the warm streamer can help detect sardine fishing schools because they migrate through the warm streamers. The warm streamer also helps detect mackerels and other fish.
Questions and Answers
Q: You talked about food chain and simultaneous occurrence of Phytoplankton bloom, zooplankton and fishes. Didn't you find any time lag between them? (Dr. Mahapatra)
A: I observed only once at Research Lab. Sardine schools appear in this area a few days after the blooming of plankton. (There seems to be a time lag ) But I don't know to be exact.

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28. Sea Surface Temperature from Multi-Sensor Data in Relation to Fish Forecasting

Presented by Dr. Mansor from University Putra
  • Dr. Mansor discussed the potential of using satellite images for fishing. He suggests development of Internet-friendly applications so that the satellite images are more easily available.
Questions and Answers
Q: In your study area, what's the maximum temperature area? (variation?) (Mahapatra)
A: There is a very low variation. I am not going to specify level yet. We have to consider other parameters before going into such a study.

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29. Numerical Simulation of Northward Migration of Speing Bloom in the Japan Sea

Presented by Dr.Yanagi, University of Kyushu
  • Dr. Yanagi presented his research results on the above topic. He will start international and interdisciplinary studies in 2001 on variability of ocean environment. He invites interested scholars to participate.
Questions and Answers
Q: Did you consider the possibility of the sinking of Phytoplankton? (Dr. Saino)
A: Yes, it is included in my model.

End of Session