Some problems in Leonardo

Discussions about the Version 4 concerning the core model simulations
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QAPTX4869
Posts: 20
Joined: Sun Feb 09, 2020 7:33 am

Some problems in Leonardo

Post by QAPTX4869 »

Dear ENVI-met team,
I'm trying to explore the relationship between vegetation cover and surface Temperature. But I find I can't see my tree shadow in Shadow Flag. The difference between the simulated and measured temperature is very small, and it is different from the situation without vegetation cover.
Besides, I can't use Speciallayer Setting to set tree and building.

I hpoe your can help me to solve this problem

Thank you

Karen
Attachments
气温模拟与实测.JPG
有树无树.JPG
阴影没有树.JPG

Tim
Posts: 2544
Joined: Mon May 15, 2017 3:46 pm

Re: Some problems in Leonardo

Post by Tim »

Hi Karen,

Yes, I don't see any tree cover either. Could you open a Leonardo Map of Atmosphere or Radiation in 3D and activate SpecialLayers. You will then see the tree (or not if not existent).

Best regards,
Tim

QAPTX4869
Posts: 20
Joined: Sun Feb 09, 2020 7:33 am

Re: Some problems in Leonardo

Post by QAPTX4869 »

Hi Tim,
It's the picture of building surface in 3D. The tree cover exists.

Karen
Attachments
有树的图.JPG

Tim
Posts: 2544
Joined: Mon May 15, 2017 3:46 pm

Re: Some problems in Leonardo

Post by Tim »

Hi,

The trees look very light green. What LAD do they have? Did you check direction shortwave radiation values?

Best regards,
Tim

QAPTX4869
Posts: 20
Joined: Sun Feb 09, 2020 7:33 am

Re: Some problems in Leonardo

Post by QAPTX4869 »

Hi,
In my database the LAD is 0.3. And I can't use the Speciallayer Legend to change the color of the tree.

Tim
Posts: 2544
Joined: Mon May 15, 2017 3:46 pm

Re: Some problems in Leonardo

Post by Tim »

Hi,

Okay, LAD of 0.3 is rather low but should definitely be recognizable in the direct shortwave radiation value comparison.

Best regards,
Tim

QAPTX4869
Posts: 20
Joined: Sun Feb 09, 2020 7:33 am

Re: Some problems in Leonardo

Post by QAPTX4869 »

Hi,
Do you means that the low LAD will affect the simulation results of radiation ?So will it have a similar effect on the air temperature?

Best regards

Karen

Tim
Posts: 2544
Joined: Mon May 15, 2017 3:46 pm

Re: Some problems in Leonardo

Post by Tim »

Hi Karen,

Tree cover should case shading thus lowering the temperatures, yes.
You checked the shading flag in the beginning. However, I'd suggest that you check the radiation output folder and the direct shortwave radiation output to verify the shading effect of your trees as you were not sure if they were correctly simulated.

Best regards,
Tim

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