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Professor Lesley Gray

Emeritus

Research theme

  • Climate physics

Sub department

  • Atmospheric, Oceanic and Planetary Physics

Research groups

  • Climate dynamics
lesley.gray@retired.ox.ac.uk
Telephone: 01865 (2)72909
Atmospheric Physics Clarendon Laboratory, room 109
  • About
  • Publications

Climate and Dynamics-D06101. Improved 11-year solar signal in the Freie Universitat Berlin Climate Middle Atmosphere Model (FUB-CMAM)(DOI 10.1029/2003JD004012)

Journal of Geophysical Research-Part D-Atmospheres Richmond, Va.: William Byrd Press for John Hopkins Press, 1949- 109 (2004) 6

Authors:

Katja Matthes, Ulrike Langematz, Lesley L Gray, Kunihiko Kodera, Karin Labitzke

Improved 11-year solar signal in the Freie Universität Berlin climate middle atmosphere model (FUB-CMAM)

Journal of Geophysical Research: Atmospheres 109 (2004) D6

Authors:

Katja Matthes, Ulrike Langematz, Lesley L Gray, Kunihiko Kodera, Karin Labitzke

Solar forcing of climate: model results

ADV SPACE RES 34:2 (2004) 343-348

Authors:

MA Palmer, LJ Gray, MR Allen, WA Norton

Abstract:

The role of stratospheric ozone changes in determining the climate response to solar forcing is investigated using a version of the Unified Model from the UK Meteorological Office which includes a mixed-layer ocean of constant depth (HadSM3). Two experiments have been performed, both of which include a wavelength-dependent reduction in total solar irradiance (TSI) of 7.5 W m(-2) (0.55%). The second experiment includes, in addition, an estimate of the accompanying stratospheric ozone changes. A large change in TSI is used (approximately a factor of two greater than the 'best-guess' change between present mean levels and the Maunder Minimum) to demonstrate the sensitivity of the climate system to this forcing. Results show that in the annual mean, the temperature response of the model is enhanced by the inclusion of the ozone changes, by approximately 15-20%. We compare results from our TSI and ozone experiment to those of Shindell et al. [Science 294 (2001) 2149] who performed a similar study with the GISS GCM. Temperature changes are greater in our simulation, as expected from the larger magnitude forcing, however the circulation response is very different: our results do not resemble the Arctic Oscillation, whilst those of Shindell et al. [loc. cit.] project strongly onto this leading mode of variability. The lack of a fully resolved stratosphere in our model is a potential reason for this distinction. To test this possibility, we repeated our combined irradiance and ozone experiment using identical model formulations, but with different vertical extents: the first extends to a height of 5 hPa, the second to 0.01 hPa. Both simulations produce a relatively weak surface pressure response to solar forcing that does not strongly resemble the Arctic Oscillation. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved.
More details from the publisher

Solar variability and climate: selected results from the SOLICE project

SPARC newsletter 23 (2004) 19-30

Authors:

JD Haigh, J Austin, N Butchart, M-L Chanin, LJ Gray, T Halenka, J Hampson, LL Hood, ISA Isaksen, P Keckhut, others

Are models underestimating the effect of solar forcing on climate?

EGS-AGU-EUG Joint Assembly (2003)

Authors:

S Crooks, M Allen, M Lockwood, L Gray, P Stott, M Palmer

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