| 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
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥3,146,000 (Direct Cost: ¥2,420,000、Indirect Cost: ¥726,000)
Fiscal Year 2011: ¥1,508,000 (Direct Cost: ¥1,160,000、Indirect Cost: ¥348,000)
Fiscal Year 2010: ¥1,638,000 (Direct Cost: ¥1,260,000、Indirect Cost: ¥378,000)
|
|---|
| 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 / 海洋科学 / 海洋生態 / 環境変動 |
|---|
| 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.
|
