Objective
SHIVA aims to reduce uncertainties in present and future stratospheric halogen loading and ozone depletion resulting from climate feedbacks between emissions and transport of ozone depleting substances (ODS). Of particular relevance will be studies of short and very short-lived substances (VSLS) with climate-sensitive natural emissions. We will perform field studies of ODS production, emission and transport in understudied, but critical, regions of the tropics using ship, aircraft and ground-based instrumentation. We will parameterise potential climate sensitivities of emissions based on inter-dependencies derived from our own field studies, and surveys of ongoing work in this area. We will study the chemical transformation of ODS during transport from the surface to the tropical tropopause layer (TTL), and in the stratosphere, using a combination of aircraft and balloon observations together with process-oriented meso-scale modelling. These investigations will be corroborated by space-based remote sensing of marine phytoplankton biomass as a possible proxy for the ocean-atmosphere flux of ODS. From this a systematic emission inventory of VSLS ODS will be established to allow construction of future-climate scenarios. The impact of climate-sensitive feedbacks between transport and the delivery of ODS to the stratosphere, and their lifetime within it, will be studied using tracer observations and modelling. Further global modelling will assess the contribution of all ODS, including VSLS (which have hitherto normally been excluded from such models) to past, present and future ozone loss. Here, the sensitivity of natural ODS emissions to climate change parameters will be used in combination with standard IPCC climate model scenarios in order to drive measurement-calibrated chemical transport model (CTM) simulations for present and future stratospheric ozone; to better predict the rate, timing and climate-sensitivity of ozone-layer recovery.
Fields of science
Programme(s)
Topic(s)
Call for proposal
FP7-ENV-2008-1
See other projects for this call
Funding Scheme
CP-FP - Small or medium-scale focused research projectCoordinator
69117 Heidelberg
Germany
See on map
Participants (13)
NR4 7TJ Norwich
See on map
60323 Frankfurt Am Main
See on map
27570 Bremerhaven
See on map
1180 Bruxelles / Brussel
See on map
CB2 1TN Cambridge
See on map
24148 Kiel
See on map
75794 Paris
See on map
LS2 9JT Leeds
See on map
2027 Kjeller
See on map
28359 Bremen
See on map
51147 Koln
See on map
50603 Kuala Lumpur
See on map
Participation ended
24148 KIEL
See on map