BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Towards national emissions verification for non-CO2 greenhouse gas
 es - Dr Matthew Rigby\, University of Bristol
DTSTART:20120312T130000Z
DTEND:20120312T140000Z
UID:TALK36586@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:To support international climate treaties\, there is a pressin
 g need to develop ‘top-down’ verification of trace gas emissions on gl
 obal and national scales.  Emissions estimates can be made using atmospher
 ic measurements\, provided that appropriate monitoring networks and comput
 er models exist.  Numerous models have been developed at institutions acro
 ss the world to simulate pollutant transport\, many of which use ‘analyz
 ed’ meteorological fields from weather forecasting centres. These transp
 ort models are combined with atmospheric measurements using statistical me
 thods such as Bayesian optimization to refine or provide independent estim
 ates of inventory emissions. Relatively simple models can reliably determi
 ne global emissions of greenhouse gases and ozone depleting species.  Thes
 e estimates are often found to be significantly different to those calcula
 ted from the bottom-up.  In recent years\, increasingly sophisticated mode
 ling tools and denser monitoring networks have allowed us to infer emissio
 ns on national scales in certain regions\, with promising results and ofte
 n large discrepancies with inventory estimates. However\, much uncertainty
  remains on these fine scales\, and improvements to monitoring networks\, 
 bottom-up inventories\, transport models and techniques for uncertainty qu
 antification will be required to make top-down methods suitable for nation
 al emissions verification. 
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
END:VEVENT
END:VCALENDAR