Johns, Tim C.

These data represent instantaneous daily values and daily mean values of selected variables for ENSEMBLES
(http://www.ensembles-eu.org). The list of output variables can be found in:
http://ensembles.wdc-climate.de/output-variables. The model output was prepared for the
ENSEMBLES Stream 2 experiment and comprises the HadGEM2-AO run ahisj
(1/12/1999-1/01/2100). The model was initialised from the HadGEM2-AO 20C3M run 1 using
1999 conditions. Anthropogenic forcings (only) were changed through the run to follow
values representing the E1 scenario prepared within ENSEMBLES specifically for the
Stream 2 experiment, i.e changes in: CO2, CH4, N2O, CFC11, CFC12, CFC113, HCFC22, Ozone,
Vegetation Distribution, Sulphur-cycle Emissions, Soot Emissions, Biomass Emissions. No
variations were made to solar radiation and volcanic aerosols. In the E1 scenario the
equivalent CO2 concentration in the atmosphere peaks at around 535 ppm in 2045 before
eventually stabilising at around 450 ppm during the 22nd Century. Several of the
forcings were specified explicitly for E1, although specific harmonisation issues needed
to be addressed in some cases. Soot and biomass emissions were constructed by scaling
from A1B emissions. Future 3d ozone concentration maps provided by the University of
Oslo were scaled down to harmonise with ozone column values at the end of the 20C3M run.
The vegetation distribution reflects the commonly-agreed method for including forcing
from anthropogenic land use change in ENSEMBLES Stream 2 simulations, in this case using
Nathalie de Noblet's maps of future crop and pasture extent derived from the IMAGE2.2
model projections of crop/pasture land use change in the 21st century under E1. The
output datasets are available in netCDF format. For composition of dataset names see
experiment METO-HC_HADGEM2AO_20C3M_1. For this experiment 2
ensemble runs were carried out (data relating to aerosol variables are only available
from this second ensemble member).
ENSEMBLES (Production of seasonal to decadal hindcasts and climate change scenarios)
Spatial Coverage
Longitude 0 to 360 Latitude -90 to 90 Altitude: -2.7 m to 10 hPa
Temporal Coverage
1999-12-01 to 2100-01-01 (360_day)
Use constraints
According to Ensembles Data Policy (http://ensembles-eu.metoffice.com/docs/Ensembles_Data_Policy_261108.pdf)
Data Catalog
World Data Center for Climate
439.24 GiB (471627511680 Byte)
completely archived
Creation Date
Cite as
Johns, Tim C. (2009). ENSEMBLES STREAM2 METO-HC-hadgem2AO E1 run2, daily values. World Data Center for Climate (WDCC) at DKRZ. http://cera-www.dkrz.de/WDCC/ui/Compact.jsp?acronym=ENSEMBLES2_HADGEM2_E1_2_D

[Entry acronym: ENSEMBLES2_HADGEM2_E1_2_D] [Entry id: 2224818]
Contact typePersonORCIDInstitute
Investigator Dr. Tim C. Johns-Met Office (HC)
Metadata Dr. Mark Elkington-Met Office (HC)
Not Filled Dr. Heinz-Dieter Hollweg-Max-Planck-Institut fuer Meteorologie (MD)

Is described by

[1] Collins, W.J.; Bellouin, N.; Doutriaux-Boucher, M.; Gedney, N.; Hinton, T.; Jones, C.D.; Liddicoat, S.; Martin, G.; O, F.'Connor, Rae, J.; Senior, C.; Totterdell, I.; Woodward, S. (2008). Evaluation of the HadGEM2 model. https://digital.nmla.metoffice.gov.uk/file/sdb:digitalFile|208ab2dd-2f97-4b1a-91cd-a68fd30e5ae9/
[2] Royer, J-F.; Lowe, J.A.; Johns, T.C.; van Vuuren, D.P.; Stehfest, E.; de Noblet, N.; Boucher, O.; Rognerud, B.; Huebener, H. (2008). Report on the Stream Two Experimental Design. ENSEMBLE-based Predictions of Climate Changes and their Impacts. http://ensembles-eu.metoffice.com/project_reporting/year5reporting/D2A.3.3_21st_century_scenario_simulations.pdf
[3] Lowe, J.A.; Hewitt, C.D.; van Vuuren, D.P.; Johns, T.C.; Stehfest, E.; Royer, J-F.; van der Linden, P.J. (9999). A new ENSEMBLES study of climate change with aggressive mitigation of emissions.
[4] Bellouin, N.; Boucher, O.; Haywood, J.; Johnson, C.; Jones, A.; Rae, J.; Woodward, S. (2007). Improved representation of aerosols for HadGEM2. https://digital.nmla.metoffice.gov.uk/download/file/sdb%3AdigitalFile%7C5cbfa153-e186-4b67-9028-a160d7cb33a5/
[5] DOI Johns, T. C.; Durman, C. F.; Banks, H. T.; Roberts, M. J.; McLaren, A. J.; Ridley, J. K.; Senior, C. A.; Williams, K. D.; Jones, A.; Rickard, G. J.; Cusack, S.; Ingram, W. J.; Crucifix, M.; Sexton, D. M. H.; Joshi, M. M.; Dong, B.-W.; Spencer, H.; Hill, R. S. R.; Gregory, J. M.; Keen, A. B.; Pardaens, A. K.; Lowe, J. A.; Bodas-Salcedo, A.; Stark, S.; Searl, Y. (2006). The New Hadley Centre Climate Model (HadGEM1): Evaluation of Coupled Simulations. doi:10.1175/JCLI3712.1
[6] DOI Martin, G. M.; Ringer, M. A.; Pope, V. D.; Jones, A.; Dearden, C.; Hinton, T. J. (2006). The Physical Properties of the Atmosphere in the New Hadley Centre Global Environmental Model (HadGEM1). Part I: Model Description and Global Climatology. doi:10.1175/JCLI3636.1
[7] DOI Ringer, M. A.; Martin, G. M.; Greeves, C. Z.; Hinton, T. J.; James, P. M.; Pope, V. D.; Scaife, A. A.; Stratton, R. A.; Inness, P. M.; Slingo, J. M.; Yang, G.-Y. (2006). The Physical Properties of the Atmosphere in the New Hadley Centre Global Environmental Model (HadGEM1). Part II: Aspects of Variability and Regional Climate. doi:10.1175/JCLI3713.1
[8] DOI McLaren, A. J.; Banks, H. T.; Durman, C. F.; Gregory, J. M.; Johns, T. C.; Keen, A. B.; Ridley, J. K.; Roberts, M. J.; Lipscomb, W. H.; Connolley, W. M.; Laxon, S. W. (2006). Evaluation of the sea ice simulation in a new coupled atmosphere-ocean climate model (HadGEM1). doi:10.1029/2005JC003033

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