ocean acidification is occurring negative impacts climate negative impacts fisheries

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Ocean acidification •is occurring •negative impacts climate •negative impacts fisherie

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Page 1: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Ocean acidification

• is occurring

• negative impacts climate

• negative impacts fisheries

Page 2: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Sybil Seitzinger

Executive Director, IGBP

www.IGBP.net

Page 3: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Ocean acidification

(Feely et al., 2008) •*

Atmos CO2

seawater CO2

pH

Page 4: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Ocean acidification

• is occurring

• negative impacts climate

• negative impacts fisheries

Page 5: Ocean acidification is occurring negative impacts climate negative impacts fisheries

29%

26%

45%

Fate of anthropogenic CO2 emissions (2000-2008)

Le Quéré et al. 2009, Nature geoscience; Canadell et al. 2007, PNAS, updated

+

Page 6: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Climate & ocean acidification

• CO2 dissolves sw

• decreases with pH

Page 7: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Climate & ocean acidification

• CO2 dissolves sw

• decreases with pH

• Organisms remove CO2

• make biomass

• calcium carbonate shells

Page 8: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Coccolithophores

NASA image

E. huxleyi

G. oceanica

C. braarudii

C. quadriperforatus

Coccolithophores largest producer of calcite on Earth

Ambient pH

Riebesell et al. 2000Langer et al. 2006

Page 9: Ocean acidification is occurring negative impacts climate negative impacts fisheries

pH disrupts shell formation

NASA image

E. huxleyi

G. oceanica

C. braarudii

C. quadriperforatus

Coccolithophores largest producer of calcite on Earth

Ambient pH pH

Riebesell et al. 2000Langer et al. 2006

Page 10: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Ocean acidification

• is occurring

• negative impact climate

• negative impacts fisheries

Page 11: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Decreasing pHRies et al. 2009Cooley and Doney 2009

Ocean acidification slows shell calcification

• economic losses

• global shellfish prod. 10.5 billion US$

• disruption livelihoodsN

et c

alci

fica

tio

n r

ate

(wt%

per

60

d)

Page 12: Ocean acidification is occurring negative impacts climate negative impacts fisheries

International coordination

www.imber.info

• standardize methods• coordinate field campaigns• synthesis

Page 13: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Summary for Policymakers

Page 14: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Ocean acidification

• is occurring

• negative impacts climate

• negative impacts fisheries

Still much to be learned!

Page 15: Ocean acidification is occurring negative impacts climate negative impacts fisheries

Sybil Seitzinger

Executive Director, IGBP

Page 16: Ocean acidification is occurring negative impacts climate negative impacts fisheries