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problems in C4 simulations #140

Closed penguian closed 5 years ago

penguian commented 7 years ago

keyword_maygit owner:jxs599@nci.org.au resolution_wontfix type_defect | by bep599

Within the subroutine photosynthesis, historically C3 and C4 are calculated within the same equation modulated by the C4 fraction of the veg type. Now that we have distinct types for each of them, we begin to see some problems arising in C4 simulations. Anna Ukkola reported the collapse of LAI in the simulation of the Konza fluxnet site, which is opposed to observations.

Yingping has worked on the problem and suggested to make it simpler by separating the two calculations. Bernard has tested it on both Konza (C4) and Tumbarumba (C3) to show that it improved the C4 simulation and does not change the C3 simulation.

Issue migrated from trac:140 at 2023-11-27 11:19:58 +1100

penguian commented 7 years ago

@bep599@nci.org.au _uploaded file Konza_run_alloc0.5_runs_daily_timeseries_testing.pdf (606.0 KiB)_

Anna's C4 problem at Konza

penguian commented 7 years ago

@bep599@nci.org.au changed milestone from 2. Submission to 5. Validation

penguian commented 7 years ago

@bep599@nci.org.au commented

The codes are in Yingping's branch: 2ea96e2e9dae6d51f16dc00df0b25af3d8390927 (main changes) and a4919e1f9a468eac82b6a57bb0da6568db8a0fdb (minor bug fix)

penguian commented 7 years ago

@bep599@nci.org.au _uploaded file LAI_run241.jpg (66.0 KiB)_

LAI improved after using the new C4 scheme

penguian commented 5 years ago

@jxs599@nci.org.au changed owner from bep599 to jxs599

penguian commented 5 years ago

@jxs599@nci.org.au changed milestone from 5. Validation to 3. Implementation

penguian commented 5 years ago

@jxs599@nci.org.au commented

merging from YP's branch is impossible as there have been thousands of developments in the interim and there is no version ancestry. Will have to re-do the changes manually.

penguian commented 5 years ago

@jxs599@nci.org.au changed status from new to closed

penguian commented 5 years ago

@jxs599@nci.org.au changed resolution from ` towontfix`

penguian commented 5 years ago

@jxs599@nci.org.au changed milestone from 3. Implementation to 1. Closed

penguian commented 5 years ago

@jxs599@nci.org.au commented

seperation ofc3 and c4 being re-evlauated

penguian commented 1 year ago

@ccc561@nci.org.au set keywords to maygit