(The old, increasingly muddled version of this page, abandoned January ‘09 can be found here. Not that this iteration isn’t starting to get tangled up on itself too…)
Robin: Scientific Issues in FAMOUS
March 09, 2012, at 10:09 AM
Mar 2012
The Geosci. Model Dev. paper on the current MOSES1 versions of FAMOUS has now made it off the discussion forum and into the GMD library proper. There is also now an ongoing special issue of FAMOUS papers at GMD that collects everything together in one page for all your FAMOUS documentation needs. The write-up of Jonny Williams’ MOSES2 tuned FAMOUS is coming along nicely as well, and I hope that will be available soon.
FAMOUS with a fully prognostic carbon cycle still seems curiously unbalanced - there seems to be some non-conservation issues in the link between TRIFFID and MOSES2, so that’s still ongoing.
I’ve got a working atmosphere-only MOSES1 FAMOUS job now, which I’m using with prescribed SSTs and sea-ice to look at issues of glacial climate sensitivity. You don’t need to mod the model too much, but you do need to be careful in how you produce the sea-surface ancils - contact me if you think this would be useful to you.
Jan 2012
Jonny Williams’s tuning ensemble has come up with the goods it seems. I’ve got PI experiments using his tuning parameters (xfhcu without TRIFFID, xfhcs with TRIFFID) that look alright when compared to older MOSES1 versions of FAMOUS, and certainly much better than the untuned MOSES2 version. Using Chris Jones’s Arcsin-Mielke scoring methodology, we have
A-M scores for seasonal surface air temperature wrt Had CM 3
==========================================================
(1=perfect correlation, 0=no correlation)
just 45–90N
| ADTAN | XDBUA | XFXWB | XFHCC | XFHCY | XFHCU | XFHCS | |
| DJF | 0.60 | 0.68 | 0.61 | 0.78 | 0.84 | 0.81 | 0.75 |
| JJA | 0.78 | 0.76 | 0.80 | 0.86 | 0.59 | 0.75 | 0.68 |
Global
| ADTAN | XDBUA | XFXWB | XFHCC | XFHCY | XFHCU | XFHCS | |
| DJF | 0.84 | 0.88 | 0.87 | 0.87 | 0.87 | ||
| JJA | 0.89 | 0.90 | 0.84 | 0.88 | 0.88 |
ADTAN= MOSES1 (Jones’05)
XDBUA= MOSES1, modified ADTAN (Smith’08)
XFXWB= MOSES1, bugfixed XDBUA (Smith’11)
XFHCC= MOSES1, XFXWB with improved top-level winds (Smith’11)
XFHCY= MOSES2 with applicable parameters as XFHCC
XFHCU= MOSES2 with parameters as TDBFD
XFHCS= MOSES2+TRIFFID with parameters as TDBFD
Issues of concern are: a very deep, not overly strong AMOC. a very weak ACC and that TRIFFID displays its usual array of biases and comes up with some rather non-ideal vegetation fields. Very much work in progress, but also worrying: if I make the carbon-cycle fully interactive then atmospheric pCO2 and surface temperatures head inexorably skyward, apparently fuelled by an imbalance in NPP and soil respiration and some curiously large stocks of soil carbon - this is under investigation.
(previous updates)
Orography/Bathymetry
(August 16, 2011, at 11:37 AM)
Ozone
(August 16, 2011, at 11:41 AM)
Sea Ice
(August 16, 2011, at 11:47 AM)
HadOCC Marine Biogeochemistry/UTOPIA
(August 16, 2011, at 11:50 AM)
Gravity Wave Drag
(August 16, 2011, at 11:55 AM)
Surface Water/Tracer conservation in the ocean
(August 16, 2011, at 11:56 AM)
Iceberg Calving
(August 16, 2011, at 11:57 AM)
FAMOUS/Glimmer Ice Sheet Coupling
(August 16, 2011, at 11:59 AM)
Orbital Forcing
(August 16, 2011, at 12:00 PM)
Land Ancillary files
(August 16, 2011, at 12:00 PM)
Greenhouse Gas Forcings
(August 16, 2011, at 12:01 PM)
Long/Negative Dates
(August 16, 2011, at 12:01 PM)
MOSES2.2 land surface scheme
(August 16, 2011, at 12:05 PM)
CO2 coupling between components
(August 16, 2011, at 12:11 PM)
Timestepping (1, 2 sweep issue)
(August 16, 2011, at 12:12 PM)
Snow-on-SeaIce bug
(August 16, 2011, at 12:15 PM)
FTL/FQW bug
(August 16, 2011, at 12:19 PM)
Ocean Filtering/Convection Order
(August 16, 2011, at 12:20 PM)
Ocean Isopycnal Diffusion
(August 16, 2011, at 04:26 PM)
FHL mods
(August 16, 2011, at 12:33 PM)
Filtering Issues
(August 16, 2011, at 01:18 PM)
Conservation Issues
(August 16, 2011, at 01:31 PM)
I’m trying to keep up incrementally with new developments under the relevant subject headings, so check back on those specific pages and look for the changes (either in the Solution section, or at the top of the page) if you’re interested in a specific issue. Datestamps under the headings indicate the last modification time of that section. Any technical details refer to my filenames only - these may well be changed/combined with others in release versions.
Standard/Release version of FAMOUS have their own changelogs at FAMOUSStandardVersions.
The old version of this page, abandoned January ‘09 can be found here.
I’m more than happy to answer queries and provide help, but it’s probably more transparent all round if questions get routed through the helpdesk, so they can be logged and tracked properly.
r.s.smith at reading.ac.uk