<p>Increasing CO<sub>2</sub> concentrations in the Earth's
atmosphere have led to global warming with climate change effects. Future RCP scenarios per the IPCC suggest
that local solutions to limit emissions are necessary but may not suffice to
combat the anthropogenic CO<sub>2</sub> problem. Climate intervention has been given
increasing consideration. A climate
intervention approach of removing CO<sub>2</sub> from the atmosphere through
dry ice deposition and storage in Antarctica is considered. While the technology needs continued
development, understanding the meteorological response to significant carbon
dioxide removal (CDR) in Antarctica takes precedence. Various Antarctica CDR scenarios are
simulated through the fully-coupled general circulation model CESM 2.1.1. Modern simulations (15 years) with prognostic
CO<sub>2</sub> include 1) anthropogenic emissions (control), 2) no emissions,
3) emissions with ~4.5 ppmv sequestration annually (half sequestration), and 4)
emissions with ~9 ppmv sequestration annually (full sequestration). Full sequestration attempts to remove enough
CO<sub>2</sub> to achieve pre-industrial concentration by the end of the
simulation. Experiments 1) and 3) were
continued until mid-21st century (50 years total) with SSP1-2.6 conditions and
emissions to examine the CDR impact on the atmosphere under the Paris Treaty
Agreement scenario (which limits Earth's warming to 1.5<sup>o</sup>C-2<sup>o</sup>C
above pre-industrial values). </p>
<p> Modern simulations show sequestration
scenarios have more of an impact on 2m-air temperature and little effect on
precipitation patterns in 15 years.
SSP1-2.6 simulations show that an additional 1<sup>o</sup>C of warming
can be inhibited by continuing sequestration and limiting emissions. Further,
sequestration shows counteraction to warming in many of the locations that are
predicted to warm per the RCP 2.6 scenario in the IPCC (2013), as well as
counteraction to the predicted IPCC precipitation changes. These results are obtained from one
simulation of each experiment, and it is recognized that ensemble runs in line
with IPCC predictions are necessary to examine all possible predictions to
CDR. Future considerations include sea
level rise, carbon cycle response, convective parameters, and relocation of
sequestration.<a></a></p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/12182028 |
| Date | 23 April 2020 |
| Creators | Andrea E Orton (8754513) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/Meteorological_Response_to_CO2_Sequestration_and_Storage_in_Antarctica/12182028 |
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