#  Harvard Climate Seminar 

 



####  calendar\_today Date and Time 

 **November 18, 2015** 

 04:00PM - 05:00PM EST 

####  pin\_drop Location 

 **Haller Hall (Geology Museum 102)**  



 

 



 

***"From the Troposphere to the Stratosphere: Physical and Chemical Details Linking Chemistry and Radiative Forcing"***by [Frank Keutsch (Harvard/SEAS)](http://www.seas.harvard.edu/directory/keutsch)

   ![keutch.png](/sites/g/files/omnuum11466/files/styles/hwp_1_1__960x960_scale/public/climate/files/keutch.png?itok=W6IPQLqS) 

 

**Abstract:**

Tropospheric ozone and secondary aerosol affect climate and are known to harm human health and ecosystems. The processing rate of gas-phase reactive carbon compounds is directly coupled to formation of ozone and secondary organic aerosol in the troposphere. I will discuss how well novel bottom-up and top-down observations of the reactive carbon budget agree within the context of anthropogenic influence and the ability to predict amounts of ozone and aerosol.

Solar radiation management (SRM), a geoengineering approach to modify Earth’s climate on a global level, has been receiving growing attention. Although most work has focused on introduction of sulfate aerosol into the stratosphere to reduce solar radiation at the surface, a number of other materials have also been considered. To date, the detailed chemical and physical properties of these materials have mostly been treated in a simplified manner. As an example of the role physicochemical detail plays in understanding consequences of SRM, I will discuss the implications of a more detailed treatment of titania (TiO2), including the role of different titania polymorphs.



 

 



 

 See also:- [ Harvard Climate Seminar ](/type-event/climate-seminar)
- [ 2015 ](/climate-seminars/2015)
 
 

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