1. Northwest Pacific Action Plan
Assessment of eutrophication using satellite derived chlorophyll-a concentration in the NOWPAP region
Genki Terauchi
Northwest Pacific Action Plan
Special Monitoring & Coastal Environmental Assessment Regional Activity Centre (NOWPAP CEARAC)　

2. Regional Sea Program and NOWPAP
Regional Sea Program (RSP)
Launched in 1974 by UNEP to address the accelerating degradation of the world’s oceans and coastal areas.
RSP covers 18 regions across the world today
NOWPAP
(Northwest Pacific Action Plan)
Adopted in 1994
China, Japan Korea and Russia
Latitude ON
Longitude 121 – 143E
NOWPAP region

3. Development of procedure for eutrophication assessment
Procedures for assessment of eutrophication status including evaluation of land-based sources for nutrients for the NOWPAP region (June, 2009 and refined in 2013)
Use of remote sensing is proposed as a screening tool
to identify potential eutrophic zones
The Common Procedures
(as of Aug 2013)

4. Location of study area

5. Assessment of eutrophication by the NOWPAP Common Procedure
More eutrophic
Threshold = 5 ug/L
Oligotrophic
(Less eutrophic)
Becoming oligotrophic
(less eutrophic)
Becoming eutrophic
NOWPAP CEARAC
2009, 2014)

6. Assessment of eutrophication in the Northwest Pacific Region with satellite Chl-a from 1998 to 2015
mg m-3
3 years ( ) mean
(mg m-3/year)
Interannual trend of annual maximum
from 1998 to 2015 HD HN HI LD LN LI
Terauchi et al (2018)

7. Use of SGLI of the GCOM-Mission will enhance the applicability of satellite Chl-a in eutrophication assessment in coastal zone
Chlorophyll-a concentration on May 23, 2018 observed by SGLI on board GCOM-C mission.
Image provided by Dr. Hiroshi Murakami, JAXA

8. Global assessment of marine and coastal eutrophication
using satellite Chl-a from 1998 to 2017
(mg m-3 / year)
G. Terauchi and E. R. Maúre (2018) HD HN HI LD LN LI
G. Terauchi and E. R. Maúre (2018)