|From||Graham Mann <G.W.Mann@leeds.ac.uk>|
|Cc||Graham Mann <G.W.Mann@leeds.ac.uk>|
|Date||Wed, 13 Jun 2018 10:41:34 +0000|
The University of Leeds is currently advertising a 33-month PDRA position for a “Stratospheric Composition Scientist” in the School of Earth and Environment:
The post is the global modelling PDRA within the “MeteorStrat” project, funded via the July 2018 NERC standard grant round. The MeteorStrat project is investigating the influence of meteoric material on the stratosphere aerosol and ozone layers, the global modelling to apply the interactive stratospheric aerosol microphysics configuration of the UK composition-climate model UM-UKCA.
The PDRA post will involve comparing interactive stratospheric aerosol UM-UKCA simulations to balloon-borne and aircraft in-situ measurements of the composition of the stratospheric aerosol layer. Observational evidence over the last decade now clearly identifies a distinct class of “meteoric-sulphuric” particles (see Murphy et al., 2014) which form heterogeneously alongside also “pure sulphuric particles” homogeneously nucleated year-round in the tropical upper troposphere (Hamill et al., 1997) and at high latitude in late-winter and spring (Campbell and Deshler, 2014).
The project will also apply UM-UKCA, with the DLAPSE polar stratospheric cloud (PSC) module (Carslaw et al., 2002), to investigate the influence of the meteoric presence in promoting the formation of nitric-acid containing PSCs in the Arctic. Comparing to observations from Arctic field campaigns (e.g. von Hobe et al., 2013) and satellite measurements (Pitts et al., 2011) the analysis will investigate whether, alongside also mountain wave induced nucleation (Mann et al., 2005) the presence of the meteoric inclusion in some stratospheric aerosol particles, can explain observed nitric-acid-containing PSC occurrence.
For informal enquiries, contact Dr. Graham Mann
G.W.Mann@leeds.ac.uk, +44 113 3431660
Mann, G. W. et al.
(2005), “Large nitric acid trihydrate particles and denitrification caused by mountain waves in the Arctic stratosphere”, J. Geophys. Res., vol. 110, doi:10.1029/2004JD005271.
stratospheric aerosol particles”, Q. J. R. Meteorol.
Soc. 140: 1269?1278,
Von Hobe, M. et al. (2013), “Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): activities and results”, Atmos. Chem. Phys., 13, 9233-9268.
** Dr. Graham Mann, Lecturer in Atmospheric Science **
** Institute for Climate & Atmospheric Science T: +44 0113 3431660 **
** Room 10.108, School of Earth & Environment F: +44 0113 3435259 **
** University of Leeds, Leeds, LS2 9JT, U.K. E: G.W.Mann@leeds.ac.uk **
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