Transpose AMIP

Contents

News

Experimental design

Data requirements

Call for diagnostic subprojects

Accessing data

Publications

FAQ

Contact / Steering Committee

WCRP

 
Frequently asked questions:
 

If you have a question which isn't covered by the answers below, please email keith.williams@metoffice.gov.uk. You will normally receive a response within a few days.

  1. Can my centre participate in running the Transpose-AMIP II experiment?
  2. Do climate centres have time to take part in Transpose-AMIP II whilst CMIP5 runs are in progress?
  3. Is Transpose-AMIP a funded project?
  4. Is it not fiddly and time consuming to initialise the land surface?
  5. How has the diagnostic list been arrived at?
  6. We have run the Transpose-AMIP II experiment - how do we submit the data?
  7. When will the data be available?
  8. Why do I have to submit a subproject proposal in order to access the data?

Can my centre participate in running the Transpose-AMIP II experiment?
Any centre running a GCM can participate in Transpose-AMIP. Whilst maximum benefit from the project is expected for climate centres, the experiment is also open to NWP centres. NWP centres planning to run an AMIP simulation for CMIP5 are encouraged to participate in Transpose-AMIP II, submitting the forecasts at the same resolution as the CMIP5 submissions. Centres with their own assimilation system are encouraged to submit two sets of experiments, one starting from ECMWF analyses and one from their own analyses. Those centres participating in CMIP5 should run the Transpose-AMIP II experiment in the same scientific configuration and resolution as their CMIP5 AMIP experiment.


Do climate centres have time to take part in Transpose-AMIP II whilst CMIP5 runs are in progress?
This is a question for each centre to answer, however we highlight that the Transpose-AMIP II experiment is computationally cheap, comprising less than 1 year of model simulation in total. In addition, the diagnostic lists, data formats and data submission methods are designed to be as similar to the CMIP5 experiment as possible. We believe that the project will achieve its maximum potential if centres are able to run the Transpose-AMIP II experiment alongside or immediately after their CMIP5 experiment.

Is Transpose-AMIP a funded project?
Transpose-AMIP is not a funded activity, however the project is endorced by the WMO through WGNE and WGCM. In the USA, CAPT (which is funded) could be aligned with the Transpose-AMIP II experimental design, whilst in Europe the EUCLIPSE project provides funding for a number of centres to conduct a Transpose-AMIP-like experiment - again we would encourage the Transpose-AMIP II experimental design to be adopted to maximise the potential intercomparison. 

Is it not fiddly and time consuming to initialise the land surface?
We have given centres a number of options for initialising the land surface, some of which are quite simple to set up (see Experimental design). It is up to each centre to decide the best approach for them taking into account knowledge of their model's land surface biases and resources available for conducting the transposr-AMIP II experiments.

How has the diagnostic list been arrived at?
The diagnostic lists are based on those being used for CMIP5. This is because centres participating in CMIP5 will be set up to generate these diagnostics and process them into netCDF format, and because a lot of work went into generating the CMIP5 lists to ensure a comprehensive set diagnostics were saved, permitting process based analysis (largely input through the CFMIP project in conjunction with GCSS).

We have run the Transpose-AMIP II experiment - how do we submit the data?
See Data requirements - submitting data.

When will the data be available?
The first Transpose-AMIP II are available now - see Accessing data for details of how to download. As each centre runs the experiment the archive will grow. We would hope that most centres will submit their data during 2011 or early 2012.

Why do I have to submit a subproject proposal in order to access the data?
It is important that both the steering committee and the modelling centres are aware of how the data is being used. Publishing submitted proposals can also act as a catalyst to stimulate other sub-projects. Please note that we will not refuse any proposal using the data for research purposes.