[pccgrads] TODAY (Fri): ATMS Colloq: Measuring Marine Cloud Brightening and Implications for Climate Engineering

UW PCC uwpcc at u.washington.edu
Fri May 8 14:50:44 PDT 2015

Colloquium Tea is at 3:00 PM in ATG 400.

Atmospheric Sciences Colloquium: Measuring Marine Cloud Brightening and
Implications for Climate Engineering
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Friday, May 08, 2015


3:30 pm - 4:50 pm PDT

Campus location

<http://www.washington.edu/maps/?JHN> Johnson Hall (JHN)

Campus room



Speaker: Lynn Russell, Professor, Climate, Atmospheric Sciences and Physical
Oceanography, Scripps Institution of Oceanography, University of California
at San Diego
Coordinator: Prof. Dale Durran ( <mailto:durrand at atmos.washington.edu>
durrand at atmos.washington.edu)
Aerosol-cloud-radiation interactions are widely held to be the largest
single source of uncertainty in climate model projections of future climate
change due to increasing anthropogenic emissions. There has been significant
progress with both observations and models on these important questions.
However, while the qualitative aspects of the indirect effects of aerosols
on clouds are well known, the quantitative representation of these processes
is nontrivial and limits our ability to represent them in global climate
models. The Eastern Pacific Emitted Aerosol Cloud Experiment (E-PEACE) 2011
was a targeted aircraft campaign with embedded modeling studies, using the
Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin
Otter aircraft and the R/V Point Sur in July 2011 off the coast of Monterey,
California, with a full payload of instruments to measure particle and cloud
number, mass, composition, and water uptake distributions. In this talk, I
will summarize three central aspects of the collaborative E-PEACE results:
(1) the chemistry and microphysics of the emitted smoke particles compared
to ship-track-forming cargo ship emissions, with particular attention to the
role of organic particles, (2) the characteristics and frequency of track
formation for smoke and cargo ships, as well as the role of multi-layered
low clouds, and (3) the implications of these findings for simulations of
aerosol-indirect effects in climate engineering.

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