Transcript Land-Atmosphere Interaction : Vegetation Feedback

Land-Atmosphere Interaction :
Vegetation Feedback
P. Friedlingstein
Stephen Guendert
Arts & Sciences
Climatic Studies
4/1/15
Contents
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About Friedlingstein
2006 Paper intro
Data/Results
Conclusion
2010 Paper intro
Data/Results
Conclusion
Questions
Professor Pierre Friedlingstein
• Research interests in the field of global carbon
and global biogeochemical cycles
• More specifically interested in time scales
towards the future in IPCC like projections
• Numerous key publications
• Member of Global Carbon
Project and actively participates
With the ICCP
Introduction (2006)
• Atmospheric CO2 concentration is one of the
most important factors likely to determine the
climate of the twenty-first century.
• In context of future climate change, carbon
cycle simulations have been extensively
performed and compared to one another in
terms of outcomes and scenarios
First, What is the Carbon Cycle?
Intro (continued)
• Climate change simulations showed a reduced terrestrial
carbon sink in all models as a result of impacts on net
ecosystem productivity of tropical and Southern Hemisphere
ecosystems
• Models indicate that the carbon cycle feedback is positive in
the future. Higher temperatures due to warmer climate leads
to less CO2 being abosrbed which in turn leads to more being
in the atmosphere
Data
Results
• All models showed larger amounts of CO2 by the
year 2100
• All models present indicated positive climate-carbon
cycle feedback, indicating the continued growth of
atmospheric CO2
• More atmospheric CO2
the hotter it gets…
Results
• Currently our atmospheric concentration is…
• In the simulations of atmospheric CO2
concentrations for 2100 are predicted to be…
Conclusion
• Although the prediction models look rather
grim, we can always have an influence and try
to steer ourselves to the better of the
predictions. We each have the power to try
and change these!
Intro (2010)
• Atmospheric content of long lived GHG represents balance
between anthropogenic emission and natural sources and
sinks.
• Human induced emissions of GHG have increased
substantially in the last 2-3 centuries since the Industrial
Revolution.
Intro (continued)
• It has long been recognized that the change in
atmospheric concentration has induced
change in the natural sink strengths
• Decadal Avg. is that 55% of anthropogenic
CO2 is absorbed while 45% remains in the
atmosphere
Data
Results
• Based on the graphs, we can see that CO2
variability is based on ENSO time scales and
will go up or down during these time periods.
• Even with this correlation, we are still emitting
too much CO2 in the atmosphere for us to be
considered at a natural level with ENSO
variations.
Results
• We are able to predict the climate from our
past with ice core archives that are taken from
around the world
• From these we can see the natural rises and
falls of CO2 concentration and have been able
to identify that we have made an impact
(negatively) on the atmosphere.
Conclusion
• With the amount of atmospheric CO2 emitted,
we have disturbed the natural process in
which the Earth has had for numerous years.
Based on the data collected we have been
able to identify us as the source of this
disturbance
References
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http://imageairy.com/carbon-mapping-services (picture)
http://emps.exeter.ac.uk/mathematics/staff/pf229
http://www.waisdivide.unh.edu/
http://www.spspblog.org/the-need-for-power-in-psychology/
(picture)
http://memestorage.com/news/you_know_it_s_hot_outside_when
_even_the_dog_starts_to_melt/2013-08-24-3893 (picture)
http://freebigpictures.com/forest-pictures/ (picture)
Intergovernmental Panel on Climate Change, Climate Change 2001:
The Scientific Basis (U.K., 2001)
Friedlingstein et al (2006)
Friedlingstein et al (2010)