BMRC is now part of CAWCR: The Centre for Australian Weather and Climate Research. For more information on The Centre please go to http://www.cawcr.gov.au
Single Column Modelling Project Webpage (BMRC, CMAR, CAWCR, Monash Uni., Melbourne Uni.)
This group (see listing below) has been formed to foster the use of Single Column Modelling in Australian weather and climate research.
Tue11Sep07: Scm Twp-icE Parameterization Study group meeting:
This was the first such meeting and the slides for it can be found here, while a list of participants can be seen below. One of the aims of this gathering was to determine the standard SCM and forcing dataset to be used in future studies on the TWP-ICE field experiment. These were determined to be:
the standard scm will be the UMv6.3 SCM with the updated PC2 cloud scheme
the standard forcing dataset will be that which can be found at the ARM repository here. Note: you need to open an account at this site in order to get in. To do this just follow the prompts when your first login fails.
Actions arising from this first meeting of the Single Column Modelling Group are:
tim, charmaine and peterM to send greg a list of their twp-ice processed fields: Tim's is here; Charmaine's is here
charmaine to make available the UMv6.3 SCM code with the updated PC2 cloud scheme, as well as a standard namelist and typical outputs: this has been done, see here
greg to setup an external site and place the above information for access by BoM external users (done! this is the site!)
greg to make available the software to create namelists for the SCM and to create a repository for scm namelists: the former can be found here while the latter is on d2/eccles at /bm/home/glr/scm_nl
greg to create a linux stand-alone version of this model: I did not have to do this as Martin has come up with a way to generate a standalone version of the SCM code that can be built on any linux machine. Charmaine has since used this to create a standalone version of our standard UMv6.3 SCM with the updated PC2 cloud scheme. See this copy of her email here
.
It was suggested that this group meet 3-4 times each year to discuss SCM modelling in Australia. This idea has been taken on board and I would like to suggest that we next aim to get together in early December to discuss what progress we have made.
Participants:
Peter Hurley - CAWCR/CMAR - Peter.Hurley@csiro.au
Todd Lane - Melbourne University - tplane@unimelb.edu.au
Kathrin Wapler - Melbourne University - kwapler@unimelb.edu.au
Christian Jakob - Monash University - christian.jakob@sci.monash.edu.au
Greg Roff - CAWCR/BOM - g.roff@bom.gov.au
Charmaine Franklin - CAWCR/BOM - c.franklin@bom.gov.au
Hongyan Zhu - CAWCR/BOM - h.zhu@bom.gov.au
Zian Sun - CAWCR/BOM - z.sun@bom.gov.au
Peter May - CAWCR/BOM - p.may@bom.gov.au
Alain Protat - CAWCR/BOM - a.protat@bom.gov.au
Timothy Hume - CAWCR/BOM - t.hume@bom.gov.au
Clara Draper - CAWCR/BOM - c.draper@bom.gov.au
Vaughan Barras - CAWCR/BOM - v.barras@bom.gov.au
Thu13Dec07: Scm Twp-icE Parameterization Study group meeting:
Greg Roff, Charmaine Franklin, Hongyan Zhu, Vaughan Barras, Zian Sun, Alain Protat (CAWCR/BOM) Peter Hurley (CAWCR/CMAR) Christian Jacob (Monash Uni.) Kathrin Wapler (Melbourne Uni.) Appologies: Clara Draper, Peter May (CAWCR/BOM)
Meeting outcomes:
SCM and TWP-ICE data - problems, solutions and updates: standalone scm must be built on a previous d2 not sx6 version; scm2nc has time setting fixed; extra scm documentation = here; there is a tstar_forcing problem with pc2; land/sea points - what forcings to use; scm setup problems - can we describe how to do it easily; christian is to go ahead with linux scm at Monash; Martin - Mac/Windows/Linux machines with an Intel compiler can run the scm; Charmaine - John Petch (UKMO) is happy to share his UM6.3 CRM outputs; Hongyan - downdrafts are always too small but when you strengthen them they always get too variable - a common problem in models (can run the model in this idealized form); Zian - UM6.3 has mods to fix a bl error, he also has a copy of UM6.6; Vaughan - the twp-ice forcing is for a sea point but uses the land and sea heating to generate the forcing, so then run as a sea point there is some conflict, christian is hoping for separate Land/Sea forcings by mid-2008; Vaughan - showed that the pbl top was ok for L38 but jumped up/down every timestep by 200m for L64, greg has seen this before in bamscm, and he tested a foggy day namelist - christian said uk tested high res L100 scm as a fog forecast forced by the nwp to forecast fog at airports, and adrian has sent Vaughan a cloudy bl namelist; PeterH - suggested we really need the twp-ice data to be quality controlled and in std format - christian said will be done in 6mnths ie june-july 2008 including just sea and just land.
Charmaine presented outcomes from the AMM paper she is working on
Hongyan presented outcomes from her convection work, see here
Vaughan presented outcomes from his pbl work, see here
Greg presented outcomes from his radar and diurnal cycle work, see here
Actions arising:
need to make TWP ICE data more easily available - I have tried http://www.nt.bom.gov.au/ntregion/ntrfc/twp-ice/twpice_info.html and http://dods.bom.gov.au/twpice/twpice.html but they seem out of date, and I have emailed peterM.
need to be able to create scm forcing data from um output for any location/date - vaughan and peter have a process to do this
Fri11Jul08: Scm Twp-icE Parameterization Study group meeting:
Greg Roff, Hongyan Zhu, Vaughan Barras, Zian Sun, Alain Protat (CAWCR/BOM) Laura Davies (Monash Uni.) Kathrin Wapler (Melbourne Uni.) Appologies: Charmaine Franklin (CAWCR/CMAR), Christian Jacob (Monash Uni., Peter May (CAWCR/BOM)
Agenda
General business: From the December meeting:
- greg: create a general namelist repository at /bm/home/glr/scm_nl containing nl_bob_bl nl_gables2 nl_toga nl_twp-ice README. The README gives a short description of the namelists and where they are from. Could participants please send me their favorite namelists so we can build this resource up?
- martin: Mac/Windows/Linux machines with an Intel compiler can run the scm; setup standalone with intel compiler? The linux/windows versions already run with this - check?
- charmaine: John Petch (UKMO) is happy to share his UM6.3 CRM outputs. This is 2D model runs though, not 3D?
- peterH: suggested we really need the twp-ice data to be quality controlled and in std format - christian said will be done in 6mnths ie june-july 2008 including just sea and just land
- peterH/Vaughan: have created a procedure to calc scm forcings from analyses. They are happy to make this available to all in the near future
- when to upgrade scm, and how easy is it, especially for the standalone - This will be either UM6.4 or UM7.1, ask martin which would be best; always keep a 3d version in line with the scm
- alain has an idl program which reads SCM simulations from TWP-ICE and converts the Ice Water Content into two reflectivities at two different wavelengths (35 and 95 GHz). At present these results are to be taken with caution if you want to compare with the Darwin ARM MMCR, as these are unattenuated reflectivities. These reflectivities could be directly compared to CloudSat for instance (but CloudSat was not there during TWPICE), which could be useful if you have SCM simulations after June 2006. Also, the relationships used have been derived from in-situ microphysic data in the -70 to -10 degrees Celsius range. I used them here in the -80 to 0 degrees range (so I extrapolated a little bit), to get reflectivities in most of the ice part. The follow-up of this work would be to process the liquid part of the simulation, and then to compute attenuated profiles from the total unattenuated profiles. And the last step (easy) would be to apply the sensitivity curve of the radar to the SCM reflectivities to replicate what the ground-based radar would really see (it won't see all the high-level clouds you generate). This would then yield reflectivity profiles directly comparable to the Darwin MMCR 35 GHz radar. Alain's idl routine can be found here. PeterM, any suggestion of a reasonable LWC-Z relationship at attenuated frequencies such as 35 or 95 GHz?
This will be followed by the following short talks:
Hongyan Zhu (CAWCR) - "Multiple Equilibria in UM-SCM of the tropical atmosphere", see here
Vaugahan Barras (CAWCR) – "Some BL results + Outcomes from the 4th PAN-GCSS meeting in Toulouse, June 2-6", see here
Kathrin Wapler (Uni. Melb) – "Comparing SCM and CRM TWP-ICE results", see here
Alain Protat (CAWCR) – "Cloud statistics over Darwin: active monsoon, break and suppressed", see here
Greg Roff (CAWCR) – "Experiments in scale: Global – Regional – SCM + Ideal", see here
Thu30Apr09: Scm Twp-ice Parameterization Study group meeting: Topics covered: an update on SCM development; CABLE; experimental hierarchy; namelist library; next standard SCM for general use
CABLE: Running in SCM with dummy namelist input fields (soil type etc); 3D version running with dummy datasets hardwired; 3D testing CABLE ancillary (holding the CABLE input fields) created and being tested by replacing MOSES ancillary; 3D testing inputting CABLE ancillary via user ancillary method (see Eva's talk below for more detail)
Experimental hierarchy: SCM(UM6.3+PC2) -> global; NWP(UM6.3+PC2) + AMIP(UM6.3+PC2) -> NWPregional(UM6.4) + NWPideal(UM6.4) (see Greg's talk below for more detail)
Namelist library: Namelist site = d2:/bm/home/glr/scm_nl (nl_bob_bl nl_hongyan_rad_conv_equil nl_twp-ice nl_gables2 nl_toga nl_vaughan_4era40_locations README); Namelist development from analyses and model output (see Vaughan talk below)
Next SCM: This will be UM7.1 as it has chemistry in it and will be the first UM model on the University system in Australia
Short talks:
Lauren Stephens and Eva Kowalczyk (CAWCR, CMAR) - "SCM/UM and CABLE", see here
Charmaine Franklin (CAWCR, CMAR) - "SCM simulations for the CFMIP/GCSS intercomparison case", see here
Vaugh Barras (CAWCR, BOM) - "Driving UM-SCM with reanalysis/model data", see here
Laura Davies (Monash Uni.) - "Ensemble Single Column Modelling of TWP-ICE", see here
Greg Roff (CAWCR, BOM) - "an update on the SCM -> NWP-global -> NWP-regional -> AMIP experimental strategy", see here
Summary + Discussion + Future meetings results:
Vaughan has packaged up a preliminary version of the genesis namelist creator software for the SCM. He's included some test datasets for people to try out as well as some fairly detailed READMEs which hopefully can get people started. Namelists do still need a bit of user tweaking here and there as the default settings are a bit rough, but in my tests the namelist files generated can be used to run the SCM successfully straight up.
The zipped tar archive is located at BOM on gale at: /bm/gkeep/vjb/genesis2.tar.gz. Maybe a version of this could be linked off the SCM users webpage? This has been done and you can get a copy of the here
We will combine with FAME/Physics meetings - and this may mean that we just give a report of the SCM/TWP-ICE research at these meetings, or we have our own meeting on the same day as FAME, but earlier in the day.)
Thu3Sep09: Scm Twp-ice Parameterization Study group report:
Many of the SCM/TWP-ICE community have been involved in various conferences recently, so an SCM/TWP-ICE meeting has not been arranged. Instead a brief review of what work is being done in this area will be presented here.
Some Recent Activities:
The web site has been updated with all the latest presentations
Zhian Sun: I have a visitor, Prof. Xinping Zhang (Hunan Normal University, China) who is working with me on implementing a water isotope scheme into ACCESS through the cable interface. The work will start with the cable SCM and will then move onto ACCESS 3D later.
Charmaine Franklin: I'm using the SCM for the CFMIP/GCSS intercomparison case on cloud feedbacks. As you know I'm also still trying to get the TWP-ICE SCM work published and tend to use that case study to investigate parameter sensitivity.
Hongyan Zhu: I am running a comparison between the UM climate model and UM-SCM, in which large scale dynamics is parameterized, in collaboration with Prof. Adam Sobel, Columbia University, New York. We have reformulated UM-SCM based on the "weak temperature gradient" (WTG) approximation, in which vertical velocity was parameterized in such a way that adiabatic cooling (warming) balances diabetic heating (cooling) exactly in the free troposphere, consistent with the assumption that temperature tendencies and horizontal gradients are both small in the deep tropics. We are interested in understanding and maximizing the degree to which SCMs with parameterized large scale dynamics can serve as surrogates for the full GCM and its performance. We hope that this frame work of SCM can used for future model development.
Vaughan Barras: Has release his preliminary Genesis program and you can find it on this scm web
Greg Roff, Martin Dix, Mike Rezny and Marcus Thatcher: We have setup and run UM7.1 SCM on the NCI machines. This was done for the CAWCR UM7.1 University Users Workshop, 2009 held in early August. During the workshop we taught the students how to setup and run: UM7.1 climate, NWP, UKCA, Idealized and SCM experiments. A copy of the workshop notes can be found here
Martin Dix: We are creating a linux version of UM7.1. Note: Um7.1 will become the replacement for UM6.3+PC2.
Alain Protat: Actually I have a question for the people in this list: what are your objectives / plans regarding the validation of your TWP-ICE SCM runs? Would you be interested in references I have derived for the statistical macrophysical, microphysical and radiative properties of anvil ice clouds from the Darwin ARM radar-lidar observations? I have now almost completed a full study of the variability of the statistical properties of ice clouds as a function of different large-scale criteria (MJO phase, large-scale regimes, ISCCP cloud regimes), which could be a good basis for model evaluation around Darwin, but I don't know if people from this SCM community would be interested in those?
Work in progress: We are creating SCM+ses2 in order to test the ses2 radiation scheme on the TWP-ICE data; We hope to create a linux version of the SCM+cable.
Any suggestions for improving this site, please email greg (g.roff@bom.gov.au). I think the clocks is cool, but let me know if it bugs you.
The coloured Javascript clock on this page shows the time
and date on YOUR system :)
