Changes between Version 17 and Version 18 of DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic
- Timestamp:
- 2015-02-26T15:16:43+01:00 (9 years ago)
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DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic
v17 v18 1 === GROUP and Objectives === 1 [[PageOutline]] 2 3 = GROUP and Objectives = 2 4 3 5 - Persons: Frederique, Agnes, Jan, Catherine, Fuxing, Tao, Philippe P., Jean Louis, ? … … 16 18 - Remarks : The agreement and the details of such roadmap should be done; Most likely we need to separate the different TASKs with a different group of people for each? 17 19 18 = == Discussions ===19 20 '''Jan Polcher, 13/01/15 (mail)''' 20 = Discussions = 21 22 == Jan Polcher, 13/01/15 (mail) == 21 23 22 24 après notre discussion cet après-midi j'ai un peu réfléchi à comment "merger" les 4 points de Philippe dans le trunk, tout en permettant à tout le monde de suivre ce qui se passe et donc de construire une confiance commune dans ces changements. … … 35 37 Pour réaliser ce plan je suis disposé à travailler avec Fuxing et Thao sur les étapes 1 et 2. Je ne peux pas quantifier le travail pour chaque étape, mais une semaine me semble un bon first-guess. Je pense que pour la neige ce sera un peu plus long. Mais comme cela vient en second on peut préparer les choses en amont. 36 38 37 '''Philipe Peylin, 17/01/15 (mail)''' 39 == Philipe Peylin, 17/01/15 (mail) == 38 40 39 41 Concernant la proposition de Jan: … … 41 43 - Ensuite pour le point 2 et 4, personnellement j'aurais traiter cela ensemble (mais je ne suis pas le plus compétent pour juger de l'intéret de séparer) 42 44 43 '''Agnès Ducharne, 23/01/15 (mail)''' 45 == Agnès Ducharne, 23/01/15 (mail) == 44 46 45 47 My opinion is that the main challenges are :[[BR]] … … 78 80 c) this still needs to be assessed, and we need to do it for CMIP6.v1 if we want to activate soil freezing. 79 81 80 '''Summary of a talk between Fuxing Wang and Aaron Boone at the AMA2015 in Toulouse''' 82 == Summary of a talk between Fuxing Wang and Aaron Boone at the AMA2015 in Toulouse == 81 83 82 84 (1) Potential problem with the too deep soil depth: A. BOONE said that not only the annual mean discharge changes by using very deep soil layers, the seasonal cycles of discharge (phase and amplitude) are changed a lot by using very deep soil layers in ISBA model. And the second situation may be more serious that the first problem. It seems the hydrology model in MPI also has this problem mentioned by A. BOONE. Currently, the soil depth is 2-3m (changing for different regions) for hydrology,and it is 12m for thermal (constant) in ISBA model. The soil moistures below 2-3m are computed by Darcy's law. … … 89 91 (3) 1st layer depth It is 1cm for the 1st soil layer in ISBA. A. BOONE's opinion is that the 1mm soil depth is too thin, and A. BOONE's suggested it better to use at least 1 cm for the 1st layer. 90 92 91 '''Jan Polcher, 26/01/15 (mail)''' to Agnès 23/01/15 93 == Jan Polcher, 26/01/15 (mail) to Agnès 23/01/15 == 92 94 93 95 thank you for this analysis ... which I totally share. I will give you my feeling on a few of the points you raise : … … 108 110 For the snow, I am still waiting to see the equations to be used to coupled the bottom temperature of snow pack with the one of the soil. Once we have all the equations of the temperature diffusion (from the skin temperature to the bottom of the soil and through the snow pack) in implicit form, things should flow smoothly. 109 111 110 '''Fuxing Wang, 26/01/15 (mail)''' 112 == Fuxing Wang, 26/01/15 (mail) == 111 113 112 114 (1) The depth. This should be configurable by the user as different applications will have different needs. We should code things so that each one can test the configuration which suits him/her best. … … 124 126 The bottom positions from top 4st to 6th layers are : 2.151cm, 4.497cm, 9.189cm. 125 127 126 '''Frédérique Cheruy, 27/01/15 (mail)''' 128 == Frédérique Cheruy, 27/01/15 (mail) == 127 129 128 130 ''About the optimal vertical discretization for W and T''[[BR]] … … 143 145 Whoever will work on that subject, it would be good to know if the bare soil albedo maps prepared by Sebastian and team can be directly pluged into Orchidee-trunk or if we need to see with ISBA people, or to redo the work ourselves. 144 146 145 '''Jan Polcher, 27/01/15 (mail)''' to F. Chéruy, 27/01/15 147 == Jan Polcher, 27/01/15 (mail) to F. Chéruy, 27/01/15 == 146 148 147 149 Je suis d'accord avec toi qu'il faudra définir la "configurabilité" des niveaux verticaux en fonction des différentes contraintes. Le nombre de nivaux sera sans doute un résultat plutôt qu'un paramètre. … … 151 153 C'est la même chose qui est fait dans LMDZ au pôle ! 152 154 153 '''Jan Polcher, 06/02/15 (mail)''' 155 == Jan Polcher, 06/02/15 (mail) == 154 156 155 157 I have given it some thought on how to specify the parameter in order to choose the common levels between hydrol and thermosoil. … … 172 174 So once we agree on the choice it can be implemented in the trunk. 173 175 174 '''Agnès Ducharne, Fuxing Wang, Fréderique Chéruy, 06/02/15 (meeting)''' 176 == Agnès Ducharne, Fuxing Wang, Fréderique Chéruy, 06/02/15 (meeting) == 175 177 176 178 We had a skype meeting today about the soil discretization for water and T. We looked at three discretizations (D1: as in Trunk; D2: 8m for water and T, with the same 17 nodes, and the same location of the top 11 nodes as in D1 for water; D3: 2m for water as in D1 + assumption of uniform profile below, 8m for T as in D2, so that the two diffusion schemes use the same nodes in the top 2m) … … 183 185 184 186 185 '''== Frederique Cheruy after Skype meeting and discussion with Jan ( 7/02/2015) ==''' 187 == Frederique Cheruy after Skype meeting and discussion with Jan ( 7/02/2015) == 186 188 187 189 * Spin-up and off-line simulations. … … 194 196 195 197 196 ''' Fuxing Wang, Fréderique Chéruy, Agnès Ducharne, Jan Polcher, Philippe Peylin, Jean-Louis DUFRESNE, et al. 11/02/2015 (mail)''' 198 == Fuxing Wang, Fréderique Chéruy, Agnès Ducharne, Jan Polcher, Philippe Peylin, Jean-Louis DUFRESNE, et al. 11/02/2015 (mail) == 197 199 '''Updated history''': 17/02/2015[[BR]] 198 200 … … 227 229 See Table 1: [https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/Table1_oscillations_LMDZOR.pdf] [[BR]] 228 230 229 '''''== Frederique Cheruy Summary (11/02/2015)''' 231 == Frederique Cheruy Summary (11/02/2015) == 230 232 231 233 … … 252 254 253 255 254 ''''''Mail JLD'''''' 255 256 256 == Mail JLD == 257 257 Hi Frederic, 258 258
