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1 03/0045a © Crown copyright Evaluating water vapour in HadAM3 with 20 years of satellite data Richard P. Allan Mark A. Ringer Met Office, Hadley Centre for Climate Prediction and Research Thanks to Tony Slingo (ESSC) and John Edwards
2 03/0045 © Crown copyright Water vapour feedback RH distribution and variability crucial to water vapour and cloud feedback (e.g. Soden et al; Wielicki et al. (2002) Science) Importance of water vapour feedback –strong positive feedback –robust physical basis –links to cloud feedback Simulations of satellite UTH radiances to evaluate HadAM3
3 03/0045 © Crown copyright Satellite clear-sky sampling Model simulations: ERA-40 and CERES daily data (Jan 98)
4 03/0045 © Crown copyright Sensitivity to clear-sky sampling Jan 1998 T_6.7 bias (K) OLRc bias (Wm-2)
5 03/0045 © Crown copyright Experiment Ensemble of AMIP-type HadAM3 runs –Standard resolution, 19 levels, 1978-1999 –HadISST SST/sea-ice forcing –Radiance code active each rad-time-step –(see Ringer et al. (2003) QJ, in press) –Additional forcings
6 03/0045 © Crown copyright Observations Satellite observations –column water vapour, CWV »SMMR 1979-84, SSM/I 1987-99 –clear-sky OLR »ERBS (1985-89), ScaRaB (1994/5), CERES (1998) –UTH channel brightness temperature, T 6.7 »HIRS 1979-1998 rms bias ~2.5 kg m -2 ~5 W m -2 ~1.5 K
7 03/0045 © Crown copyright Mean and difference to observations 60 o S-60 o N oceans
8 03/0045 © Crown copyright T 6.7 (K) (mb/day) OLRc (W m -2 ) CWV (kg m -2 )
9 03/0045 © Crown copyright Column Water Vapour difference (kg m -2 HadAM3-OBS) DJF JJA
10 03/0045 © Crown copyright Effects of clear-sky sampling Type II HadAM3-OBS (JJA) Type I T 6.7 c OLRc
11 03/0045 © Crown copyright EOF analysis of HadAM3 and HIRS channel 12 T_6.7 radiances
12 03/0045 © Crown copyright Interannual monthly anomalies over the tropical oceans Reduce effects of local changes in atmospheric circulation Maximise reliability of satellite data Also additional forcings considered
13 03/0045 © Crown copyright
14 03/0045 © Crown copyright
15 03/0045 © Crown copyright Clear-sky sampling: interannual variability Light blue: Type I (weighted by clear-sky fraction) Dark Blue: Type II (standard diagnostic)
16 03/0045 © Crown copyright Summary Simulations of satellite brightness temperatures sensitive to RH Consistent decadal variability suggests small DRH realistic Clear-sky sampling is important for infrared channel climatologies but not interannual variability Overactive circulation in HadAM3 Limitations of data
17 03/0045a © Crown copyright Visit the Met Office at booth 145
1 Evaluating water vapour in HadAM3 using 20 years of satellite data Richard Allan, Mark Ringer Met Office, Hadley Centre for Climate Prediction and Research.
RMS 18 th June 2003 Evaluating moisture in the Hadley Centre Climate Model using 20 years of satellite data Richard Allan Environmental Systems Science.
IPCC Workshop on Climate Sensitivity, Paris, July 2004 Exploiting observations of water vapour to investigate simulations of water vapour feedback processes.
WGCM CFMIP/IPCC Climate Sensitivity Meeting, Exeter, April 2004 Decadal Variability in Water Vapour Richard Allan, Tony Slingo Environmental Systems Science.
IRS2004, Busan, August 2004 Using Satellite Observations and Reanalyses to Evaluate Climate and Weather Models Richard Allan Environmental Systems Science.
Trends in Water Cycle meeting, Paris, November 2004 Cloud and water vapour variability: models, reanalyses and observations Richard P. Allan and Tony Slingo.
1 Changes in low-latitude radiative energy budget - a missing mode of variability in climate models? Richard P. Allan, Tony Slingo Hadley Centre for Climate.
1 Evaluating climate model using observations of tropical radiation and water budgets Richard P. Allan, Mark A. Ringer Met Office, Hadley Centre for Climate.
Atmospheric clear-sky longwave radiative cooling and precipitation Richard Allan Environmental Systems Science Centre, University of Reading, UK.
Changes in Water Vapour, Clear-sky Radiative Cooling and Precipitation Richard P. Allan Environmental Systems Science Centre, University of Reading, UK.
© University of Reading 2009 EUMETSAT Monitoring changes in precipitation and radiative energy using satellite data and.
1 Using Reanalyses in combination with Earth Radiation Budget data to evaluate climate model simulated cloud radiative properties Richard P. Allan, Tony.
Changes in clear-sky longwave radiative cooling in the atmosphere Richard Allan Environmental Systems Science Centre, University of Reading,
University of Reading 2007www.nerc-essc.ac.uk/~rpa Monitoring satellite observations and model simulations of changes in the atmospheric.
© University of Reading Monitoring and understanding current changes in the global energy & water cycles Richard Allan.
3) Empirical estimate of surface longwave radiation Use an empirical estimate of the clear-sky surface downward longwave radiation (SDLc) to estimate the.
© Crown copyright 2006Page 1 CFMIP II sensitivity experiments Mark Webb (Met Office Hadley Centre) Johannes Quaas (MPI) Tomoo Ogura (NIES) With thanks.
University of Reading Improved understanding of how rainfall responds to a warming world Richard Allan Environmental Systems.
© University of Reading Chapman Conference on Atmospheric Water Vapor and Its Role in Climate Tropospheric Water Vapour and.
Addition 1’s to
1 Changes in global net radiative imbalance Richard P. Allan, Chunlei Liu (University of Reading/NCAS Climate); Norman Loeb (NASA Langley); Matt.
University of Reading 2007www.nerc-essc.ac.uk/~rpa Observed and simulated changes in water vapour, precipitation and the clear-sky.
Addition Facts = = =
SYSTEMATIC BIASES 3-hourly comparisons of top of atmosphere radiation from GERB and the Met Office global forecast model Systematic biases in model fluxes.
1 Hadley Centre Using Earth radiation budget data for climate model evaluation Mark Ringer Hadley Centre, Met Office, UK GIST 19: Aug 27-29, 2003.
Trends in Tropical Water Vapor ( ): Satellite and GCM Comparison Satellite Observed ---- Model Simulated __ Held and Soden 2006: Robust Responses.
Using GERB and CERES data to evaluate NWP and Climate models over the Africa/Atlantic region Richard Allan, Tony Slingo, Ali Bharmal Environmental Systems.
GERB/CERES Meeting 2006 Exeter Evaluation of clouds and radiation in the Met Office global forecast model using GERB/SEVIRI data Richard Allan, Tony Slingo.
NCAS Conference December 2007, Park Inn Hotel, York The Indian monsoon and climate change Andrew Turner, Julia Slingo.
University of Reading 2007www.nerc-essc.ac.uk/~rpa Present day changes in tropical precipitation extremes in models and observations.
Page 1© Crown copyright 2004 The Hadley Centre The forcing of sea ice characteristics by the NAO in HadGEM1 UK Sea Ice Workshop, 9 September 2005 Chris.
NCAS-Climate Talk 15 th January 2010 Current Changes in the Global Water Cycle Richard P. Allan Diffusing slowly to Met Department/NCAS-Climate from ESSC.
WEEK 1 You have 10 seconds to name…
ESSC Seminar, October 18, 2007© University of Reading 2007www.reading.ac.uk Intensification of the tropical hydrological cycle? Richard P. Allan Environmental.
Links Between Clear-sky Radiation, Water Vapour and the Hydrological Cycle Richard P. Allan 1, Viju O. John 2 1 Environmental Systems Science Centre, University.
© Crown copyright 2006Page 1 CFMIP II Plans Mark Webb (Met Office Hadley Centre) Sandrine Bony (IPSL) Rob Colman (BMRC) with help from many others… CFMIP/ENSEMBLES.
EUMETSAT 2006 Helsinki Exploitation of GERB/SEVIRI data for evaluation of the Met Office global forecast model Richard Allan, Tony Slingo Environmental.
Year 6 mental test 10 second questions Numbers and number system Numbers and the number system, fractions, decimals, proportion & probability.
© University of Reading Richard Allan Department of Meteorology, University of Reading Thanks to: Jim Haywood and Malcolm.
© University of Reading Radiative effects of persistent aircraft contrails: a case study Richard Allan Environmental Systems.
Current Changes in the Global Water Cycle Richard P. Allan Department of Meteorology, University of Reading Thanks to Brian Soden, Viju John, William Ingram,
Page 1© Crown copyright 2007 CFMIP2: Options for SST-forced and slab experiments Mark Ringer, Brian Soden Hadley Centre,UK & RSMA/MPO, US CFMIP/ENSEMBLES.
Current Changes in Tropical Precipitation Richard P. Allan Department of Meteorology, University of Reading Thanks to Brian Soden, Viju John, William Ingram,
Page 1© Crown copyright 2004 Seasonal forecasting activities at the Met Office Long-range Forecasting Group, Hadley Centre Presenter: Richard Graham ECMWF.
Page 1© Crown copyright Simulation of radar reflectivities in the UK Met Office model: comparison with CloudSat Data Alejandro Bodas-Salcedo, M.E. Brooks.
SW o SOLAR LW o OLR. SW response T response ScaRaB = SW and LW broadband radiometer measuring the whole spectral ranges of the solar reflected radiation.
Evaluating the Met Office global forecast model using GERB data Richard Allan, Tony Slingo Environmental Systems Science Centre, University of Reading.
User experience with extended range forecasts -- climatic aspects of ECMWF products Christof Appenzeller Wolfgang Müller Heike Kunz Mark Liniger ERA-40.
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