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Altimetry and Biogeochemistry. Adrian Martin With input from John Allen, Graham Quartly, Meric Srokosz, AndrewYool. Altimetry and Biogeochemistry. Biomes: the big picture 3 examples: - Silica cycle - Filaments - Biodiversity The role of altimetry - PowerPoint PPT Presentation
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Altimetry and Biogeochemistry
Adrian Martin
With input from
John Allen,Graham Quartly,Meric Srokosz,AndrewYool
Altimetry and Biogeochemistry
• Biomes: the big picture• 3 examples:
- Silica cycle- Filaments- Biodiversity
•The role of altimetry•Why wide swath is good news
Sarmiento et al., GBC, VOL. 18, GB3003, doi:10.1029/2003GB002134, 2004
Biomes
Biomes
Need multidisciplinary local studies tocharacterise each biome.
Such detailed studies crucial to understand how functioning of biomeresponds to different forcing.
Phytoplankton & biogeochemistry
diatoms
coccolithophores
Silica cycle
FISHES Cruise, 2001
Allen, J.T. et al. (2005)Nature, 437, 728-732.
Filaments
Cruise D321August 2007
SSH
SST
Filaments
-20-22
60
59
Filaments
Filaments
Biodiversity
BiodiversityPicophytoplankton Heterotrophs Synechococcus
Large phytoplankton Bacteria Viruses
Central problem
How do we extrapolate knowledge of processes at a local scale toquantitative estimates at the biome scale?
The role of altimetry
Altimetry offers information crucial to extrapolating to the biome scale.
Specifically it offers:- a physical context- dynamical information- a means of tracking features- a means of auditing features- data even when there is cloud
So why is wide-swath so much better?
Better resolution of currents
Higher resolution of features
Less gaps for features to ‘fall into’
Potential for quantifying vertical fluxes
5) What other remote measurements would complement the altimetric data? HR wind, SST, colour, pigments, SSS 6) What other chemical & biological properties of seawater would it be useful to measure together with SSH?Depends on the question…
Workshop questions
O(100km) swath width- to cover a process cruise area- large enough to accommodate
scale of local mesoscale features
Re-visit every 5 days
Ability to resolve 10km features (20km wavelength)
What specification for biogeochemistry?
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