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PostPosted: Fri Mar 13, 2020 9:25 am 
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Download HadCM3Q(0-16) global model data from the BADC

You can now download HadCM3Q(0-16) global model data from the British Atmospheric Data Centre (BADC). You will need to register for a BADC account and then apply for access to the restricted data set. For access click on the Data Tab, then Dataset Index, go to Climate Impacts LINK Project, click on Apply for Access and then follow the instructions. You can then access the data here

About the BADC data

The QUMP with PRECIS research theme aims to provide probabilistic predictions of future climate. These are based on large ensembles of simulations of equilibrium and time-dependent change, carried out by perturbing poorly constrained parameters controlling key physical and biogeochemical processes in the HadCM3 coupled ocean-atmosphere global climate model. Further ensembles of regional climate simulations at high resolution, driven by boundary conditions obtained from the HadCM3 ensemble, allow the specification of probabilistic predictions at spatial scales suitable for climate impact studies. These experiments allow quantification of the effects of earth system modelling uncertainties and internal climate variability on feedbacks likely to exert a significant influence on twenty-first century regional climate.

The data at /badc/hadcm3/data/PRECIS/ are the output data from the HadCM3Q GCM ensemble, which used the SRES A1B scenario (see the Special Report on Emissions Scenarios (SRES)), spans December 1949 to November 2099, split up according to their runid and then by their stash code. A description of the runids and stash codes can be found below.

The diagnostics are either on the horizontal 'pressure grid' or the horizontal 'wind grid'. For the 'wind grid' an Arakawa B grid layout is used, in which wind variables are offset from all other variables (said to be on the 'pressure grid') by half a grid box in both directions. The 'wind grid' has the same number of points in the east-west direction as the 'pressure grid', but one less in the north-south direction.

For more information about the structure of PP files please read Appendix D and E of the PRECIS Technical Manual. Some files are available as monthly means and some are available as daily means.

Each daily mean file contains 360 fields (one field per day for a year in the 360 day calendar used by HadCM3Q). Each monthly mean tarball contains a files with one field (one field for a month covering the span of December 1949 to November 2099.

To un-tar the files please use the following command:

tar xvf [file].tar
eg.

Code:
tar xvf aenwh_08020.tar


Please find below tables of information about the runids and stash codes.

Run IDs

aenwh HadCM3Q0
aexsr HadCM3Q1
aexsb HadCM3Q2
aexsa HadCM3Q3
aexsc HadCM3Q4
aexsd HadCM3Q5
aexsh HadCM3Q6
aexsf HadCM3Q7
aexsj HadCM3Q8
aexsi HadCM3Q9
aexsk HadCM3Q10
aexsm HadCM3Q11
aexsn HadCM3Q12
aexso HadCM3Q13
aexsl HadCM3Q14
aexsp HadCM3Q15
aexsq HadCM3Q16


Monthly Files Stash Codes

1 Surface Pressure Pa SO P
24 Surface (Skin) Temperature K SO P
1201 Net Down Surface SW Flux W/m**2 SO P
1207 Incoming SW Flux at TOA W/m**2 MSL P
1208 Outgoing SW Flux at TOA W/m**2 MSL P
1235 Total Downward Surface SW Flux W/m**2 SO P
2201 Net Down Surface LW Flux W/m**2 SO P
2204 Total Cloud Amount (0<=x<=1) --- MSL P
2205 Outgoing LW Flux at TOA W/m**2 MSL P
3217 Surface & BL Heat Fluxes W/m**2 SO P
3223 Surface & BL Moisture Fluxes kg/m**2/s SO P
3225 Wind U-Component at 10 Metres m/s SO W
3226 Wind V-Component at 10 Metres m/s SO W
3236 Temperature at 1.5 Metres K SO P
3237 Specific Humidity at 1.5 Metres kg/kg SO P
3245 Relative Humidity at 1.5 Metres % SO P
3249 Wind Speed at 10 Metres m/s SO W
4203 Large Scale Rainfall Rate kg/m**2/s MSL P
4204 Large Scale Snowfall Rate kg/m**2/s MSL P
5205 Convective Rainfall Rate kg/m**2/s MSL P
5206 Convective Snowfall Rate kg/m**2/s MSL P
5216 Total Precipitation Rate kg/m**2/s MSL P
8208 Available Soil Moisture Content in Root Zone kg/m**2 SO P
8234 Surface Runoff Rate kg/m**2/s SO P
8235 Sub-Surface Runoff Rate kg/m**2/s 0Pa P
15201 Wind U-Component (=U) m/s @ W
15202 Wind V-Component (=V) m/s @ W
15226 Specific Humidity (=Q) kg/kg @ W
16202 Geopotential Height (=Z) m @ P
16203 Temperature K @ P
16204 Relative Humidity % @ P
16222 Pressure at Mean Sea Level Pa MSL P

Daily Files Stash Codes

1201 Net Down Surface SW FluX W/m**2 SO P
1235 Total Downward Surface SW Flux W/m**2 SO P
2201 Net Down Surface LW Flux W/m**2 SO P
2205 Outgoing LW Flux at TOA W/m**2 MSL P
3217 Surface & BL Heat Fluxes W/m**2 SO P
3223 Surface & BL Moisture Fluxes kg/m**2/s SO P
3225 Wind U-Component at 10 Metres m/s SO W
3226 Wind V-Component at 10 Metres m/s SO W
3236 Temperature at 1.5 Metres K SO P
3245 Relative Humidity at 1.5 Metres % SO P
3249 Wind Speed at 10 Metres m/s SO W
5216 Total Precipitation Rate kg/m**2/s MSL P
8208 Available Soil Moisture Content in Root Zone kg/m**2 SO P
15201 Wind U-Component (=U) m/s * W
15201.inst Wind U-Component (=U) m/s I W
15202 Wind V-Component (=V) m/s * W
15202.inst Wind V-Component (=V) m/s I W
15226 Specific Humidity (=Q) kg/kg * W
16202 Geopotential Height (=Z) m # P
16203 Temperature K @ P
16204 Relative Humidity % ~ P
16222 Pressure at Mean Sea Level Pa MSL P

Key to Stash Codes

W Wind Grid
P Pressure Grid
SO Surface Only
MSL Mean Sea Level
I Six hourly instantaneous values on 850 and 300 hPa pressure levels
~ Values on 500 HPa pressure level only
# Values on 850, 700 and 500 hPa pressure levels
* Values on 1000, 925, 850, 700, 600, 500, 400, 300 and 200 hPa pressure levels
@ Values on 1000, 925, 850, 700, 600, 500, 400, 300, 200, 100, 70, 50, 30, 20 and 10 hPa pressure levels

_________________
Simon Tucker
Met Office Hadley Centre


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