Faculty Candidate Seminar - Heather Graven


 
05/31/2018 - 4:00pm
Location: 
Eckart Lecture Hall room 227j
Event Description: 

SCRIPPS INSTITUTION OF OCEANOGRAPHY FACULTY CANDIDATE SEMINAR:  Trace Gases in the Atmosphere


DATE:          May 31st, Thursday, 4p.m.  

LOCATION:     Eckart Lecture Hall
 
SPEAKER:      Heather Graven, Ph.D.
            Imperial College London
            

TITLE:          Estimating and attributing trace gas fluxes using radiocarbon

 


ABSTRACT:
 
Radiocarbon is a valuable tracer used in various applications that exploit the natural production and decay of radiocarbon, or the "bomb" radiocarbon produced by nuclear weapons testing in the 1950s and 60s. In atmospheric science and biogeochemistry, carbon added by fossil fuel sources can be quantified using radiocarbon because fossil-derived carbon has no radiocarbon, in contrast to biologically-derived carbon. I will present recent observation-based estimates of fossil fuel CO2 emissions in California using radiocarbon, demonstrating that this technique can provide independent validation of reported fossil fuel CO2 emissions in California, and potentially other regions. I am currently developing new methods for observing radiocarbon in atmospheric CH4, and I will show simulations indicating how observations of radiocarbon in atmospheric CH4 can help constrain fossil vs biological CH4 emissions in California. I will discuss links with other trace gases and the outlook and impacts of atmospheric radiocarbon and trace gas changes over this century, particularly on the future use of radiocarbon and transient tracers for studying ocean circulation and variability.
 
 
 
 Faculty Host:  Kate Ricke (kricke@ucsd.edu)
For more information on this event, contact: 
lcosti@ucsd.edu
Event Calendar: 
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