Download NMA-course Ph.D-presentation_Moa

The carbon system in the Baltic Sea
oceanography/marine chemistry
Moa Edman
Ph.D. student
Department of Earth Sciences
University of Gothenburg
Supervisors: Anders Omstedt and Leif G. Anderson
E-Mail: [email protected]
Homepage: www.oceanclimate.se
In general:
My research concerns numerical modeling of the acid-base
(pH) balance in costal seas, and more specifically, in the
Baltic Sea.
I will use both numerical models and available data to
analyze and understand the sensitivity and function of the
carbon, and the general biogeochemical, system.
Questions such as:
• How sensitive is the Baltic Sea region to acidification?
• What consequences should we expect in the Baltic Sea, and
if possible, plan for under a changing climate?
The Baltic Sea carbon system
4 carbon
system parameters:
•
•
•
•
AT
CT
fCO2
pH
Planed projects:
• Perform a pH sensitivity study in the Baltic Sea to pinpoint the most
important influences to the carbon system.
Within Baltic-C:
• Validate the PROBE-Baltic model further with new data within
Baltic-C
• Use the model to run scenarios. The scenarios will be based on
different climate change developments, and their implications on
land with biota, soil and limnic waters in the Baltic Sea region.
• The results will be evaluated and should give an overview of how
the Baltic Sea carbon system might be affected by climate change.
This far:
First project is a sensitivity study:
What are the main influences on pH in the Baltic Sea?
• Data overview
– Natural variations and range of pH
• Analytical calculations
• Box-model investigation
– Steady state calculations for different sets of forcing
– Investigating influences from land, from the atmosphere, and
also from inflowing sea water.
• Transient model investigation
– Numerical modeling with the PROBE-Baltic model.
– The change of some key parameters are investigated in different
scenarios. Scenarios are based on previous box-modeling.
Data overview:
Map of the Baltic Sea, with station BY15.
From top to bottom: Time series of surface pH-data,
annual pH means and standard deviations , and
monthly pH means with standard deviations.
Example of analytical result:
…and the work continues
In general:
• I hope to work with further improvement in the field of
biogeochemical ocean modelling
• Interesting unknowns!
The end