Correlation analysis between phytoplankton functional types and the ocean partial pressure of carbon dioxide using the satellite ocean colour observation and marine ecosystem modelling.

2011 Fiscal Year Final Research Report

• Project/Area Number: 22810001
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Hokkaido University
• Principal Investigator: HIRATA Takafumi 北海道大学, 大学院・地球環境科学研究院, 博士研究員 (80576231)
• Co-Investigator(Renkei-kenkyūsha): YAMANAKA Yasuhiro 北海道大学, 大学院・地球環境科学研究院, 教授 (40242177) ; FUJII Masahiko 北海道大学, 大学院・地球環境科学研究院, 准教授 (60443925)
• Project Period (FY): 2010 – 2011
• Keywords: 二酸化炭素分圧 / 植物プランクトン / リモートセンシング / モデル

Research Abstract

Time series of partial pressure of carbon dioxide and phytoplankton functional types(PFTs) were reconstructed from the existing ocean colour data. Temporal anomaly of pCO_2 and fractional Chlorophyll-a(Chla) of each PFT showed a significant negative correlation around the sub-arctic or sub-tropical frontal zones, which was also found from the hindcast simulations of a marine ecosystem model. On the other hand, correlation between pCO_2 and a relative contribution of each PFT to the total Chla showed a taxonomic dependence in the frontal zones : the large-and middle-sized algae such as diatoms and haptophytes showed a negative correlation with pCO_2 whereas the small-sized algae a positive correlation. These results imply that phytoplankton community structure, as well as their biomass, may play an important role on variation in pCO_2 for some oceanic regions.

Research Products

• [Journal Article] A comparison between phytoplankton community structure derived from a global 3D ecosystem model and satellite observation (2012)
  • Author(s): Takafumi Hirata, Stephane Saux-Picart, Taketo Hashioka, Maki Aita-Noguchi, Hiroshi Sumata, Masahito Shigemitsu, J. Icarus Allen, Yasuhiro Yamanaka
  • Journal Title: Journal of Marine Systems
  • URL: http://dx.doi.org/10.1016/j.jmarsys.2012.01.009
• [Journal Article] Synoptic relationships between surface Chlorophyll-a and diagnostic pigments specific to phytoplankton functional types (2011)
  • Author(s): Takafumi Hirata, Nickolas, J. Hardman-Mountford, Robert, J. W. Brewin, Koji Suzuki, Tomonori Isada, Evan Howell, Taketo Hashioka, Maki Noguchi-Aita, Yasuhiro Yamanaka
  • Journal Title: Biogeosciences Volume: 8 Pages: 311-327
• [Journal Article] An intercomparison of bio-optical techniques for detecting dominant phytoplankton size class from satellite remote sensing (2011)
  • Author(s): Robert R. J. W. Brewin, Nicholas J. Hardman-Mountford, Samantha Lavender, Dionysios, E. Raitsos, Takafumi Hirata, Julia Uitz, Emmanuel Devred, Annick Bricaud, Aurea Ciotti, Bernard Gentili
  • Journal Title: Remote Sensing of Environment Volume: 115 Pages: 325-339
• [Journal Article] A three-component phytoplankton size class model for the Atlantic ocean (2010)
  • Author(s): Robert J. W. Brewin, Shubha Sathyendranath, Takafumi Hirata, Samantha Lavender, Rosa M. Marciela, Nicholas Hardman-Mountford
  • Journal Title: Ecological Modelling Volume: 221 Pages: 1472-1483
• [Presentation] A comparion between global phytoplankton types estimated by model and satellite (2011)
  • Author(s): Takafumi Hirata
  • Organizer: Advances in Marine Ecosystem Model Researches
  • Place of Presentation: University of Plymouth, Plymouth, UK.
  • Year and Date: 20110627-30
• [Presentation] A comparion between the biomass distribution of zooplankton estimated from satellite and marine ecosystem models ; assessment of spatial applicability of the models (2011)
  • Author(s): Takafumi Hirata
  • Organizer: Advances in Marine Ecosystem Model Researches
  • Place of Presentation: University of Plymouth, Plymouth, UK.
  • Year and Date: 2011-06-30
• [Presentation] Dynamics of phytoplankton community structure derived from a 3D ecosystem model and satellite ocean colour algorithm (2011)
  • Author(s): Takafumi Hirata
  • Organizer: International workshop of climate change and ocean carbon, International workshop of climate change and ocean carbon
  • Place of Presentation: Xiamen University, Xiamen, China
  • Year and Date: 2011-04-04
• [Presentation] A comparison between a 3D ecosystem model and satellite observations of phytoplankton community structure in the global oceans (2010)
  • Author(s): Takafumi Hirata
  • Organizer: IMBER IMBIZO2
  • Place of Presentation: The Hellenic Center for Marine Research, Creta, Greece
  • Year and Date: 2010-10-12