# Wood thinning in ACCESS

**URL:** <https://forum.access-hive.org.au/t/wood-thinning-in-access/1923>\
**Category:** Working Group\
**Created:** [13 March 2024 23:37 UTC](https://forum.access-hive.org.au/t/wood-thinning-in-access/1923 "2024-03-13T23:37:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![tammasloughran](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/tammasloughran/32/209_2.png) [@tammasloughran](https://forum.access-hive.org.au/u/tammasloughran)\
**Post date:** [19 March 2024 09:03 UTC](https://forum.access-hive.org.au/t/wood-thinning-in-access/1923/2 "2024-03-19T09:03:38Z")

</div>

Some plots from my first attempt at running this.

## Vegetation pools

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| --- | --- | --- |
| ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/7/726f6d8309a60e158ba4f4a588911cd516de1faa.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/8/8b4b7238f7ff239e2b19f2175bb6154869d2dc6b.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/d/d511074f269ddf0ad50640b72c9fe338d2b6edee.png) |

## Litter pools

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| --- | --- | --- |
| ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/a/a62e3185b68aea072163fce2429f91e8366655c6.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/b/be14292a9702ec6f379f8a81c42efba3f59e0eda.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/6/6eccd9f29076ae74620ee4ef29c21c0c0e17f721.png) |

## Harvest pools

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| --- | --- | --- |
| ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/f/ffd82b1cf0dd181461f647a432e8e7c477320a67.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/b/bf2f1ccd1b618b14d98d4a5e5957cdf6c0747995.png) | ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/9/9387de5ac87d752e646989b4946e30e2ccd9535b.png) |

The code seems to work.  
Carbon is harvested from the vegetation pools and is put into the litter pools much like regular land use change.  
The wood product pools (wood\_harvest\_n) decay over time except for the slowest pool with accumulates.

The problem seems to be that the thinning forcing data is not being used. The vegetation is harvested everywhere and **a lot** is being harvested (almost all of it).  
The variable code in the restart file it’s supposed to use is 916. This is a spatially explicit fraction of harvested biomass. 0 means all wood is harvested and 1 means no wood is harvested. I suspect that this is initialized with 0s and then the UM somehow never passes the thinning data to CABLE. I’m not really familiar with the UM-CABLE interface code.

Maybe I’m injecting the thinning data into the wrong field in the restart file? I know it’s supposed to be 916 but there are several 916s in the restart file.

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_[View the full topic](https://forum.access-hive.org.au/t/wood-thinning-in-access/1923)._