Changes between Version 52 and Version 53 of ArchiveReport

Timestamp:

Apr 30, 2021, 10:50:15 AM (4 years ago)

Author:

cmathe

Comment:

--

ArchiveReport

@@ -1 +1 @@
 = Archive of POULDP reports =
 
+'''29^th^ April 2021'''
+{{{
+
+Duration: 1h30mn
+
+Participants: Lucas, Joseph, Siteng, Ehouarn, Romain, Thomas, Francisco, Antoine, Francois, Antony
+Margaux, Aymeric, Christophe
+
+Recent commits: https://trac.lmd.jussieu.fr/Planeto/log
+==============
+- r2502: set icelocationmode=4 as default mode (set watercaptags as before) in surfini
+- r2505: code clean-up (remove obsolete files in LMDZ.MARS/libf/dynphy_lonlat)
+- r2507: modifications in the calendar values stored in restart files for 1+1=2
+- r2508: separating water ice deposit albedo cases between "cap" and "frost"
+
+Recent tickets: https://trac.lmd.jussieu.fr/Planeto/report/1
+==============
+- None
+
+Wiki updates: https://trac.lmd.jussieu.fr/Planeto/wiki
+============
+- None
+
+Ongoing discussions:
+===================
+
+* Brutal drying up in the thermosphere issue: (Francisco, Margaux, Francois)
+Francisco found the problem comes from a drastic 1.e-8 threshold correction in waterclouds
+Strong improvement in the upper atmosphere when setting this threshold to 1.e-12
+Francois did some tests with 1.e-16 => does influence the polar hood, but the later is
+quite variable from a week to the next
+It also makes sens for HDO computations to lower this threshold.
+=> All agree we should lower the threshold to 1.e-16
+=> Francois will check saturation at 90K to target the value
+
+* Crash with unexpected unrealistic HDO ratio: (Jean-Yves, Margaux, Ehouarn)
+HDO_ice ratio of 4000 from the dynamics
+Problem identified (with isotopes) to comes from the dynamics
+
+* Comparing GCM runs with TIRVIM (& MCS): (Antoine, Sandrine, Siteng)
+
+* Dynamico-Mars:
+- what time to set when calling the physics from dynamico?
+- what calendar setup to use in XIOS? Still needs to be checked due to restarts, etc.
+
+Christophe:
+- someone should make a utility to compute surface emissivity at 32um
+=> open a ticket
+
+Joseph:
+- work on the present day water cycle: strong impact on the physics time step
+  (as found by Margaux) which makes the water cycle drier. Some retuning needed
+  frost albedo, contact parameter, variance of the distribution (won't play with that one)
+- new vdifc for Margaux to test.
+
+Siteng:
+- started with the GCM on Ciclad.
+
+Antoine:
+- mountain slope flows parametrization => only the biggest mountains are now used (6)
+  also did a test run with 19 biggest mountains (converges to similar results)
+  still not very good in terms of detached layers at the beginning of the year...
+- NB: for computations of DSO there is some latitude on choice of underlying factors
+  for comparisons with MCS
+- run more years to check convergence.
+
+Lucas:
+- Insight surface pressure measurement drift. Add a correction for sensor temperature
+  and then 1st and 2nd years match
+- some divergence with the model around Ls=300-360 to further investigate
+- also looks at MSL pressure data over 4-5 Mars years
+- checks the VL data and its interpolated derivation that is used to rescale the MCD
+
+Thomas:
+- MCD slope winds parametrization: putting it all together for all times of day
+  and location. Still some problems in the night.
+}}}