Missing inverse barometer effect?

[EmilioEchevarria]

Hi all,

I'm very new to SCHISM. I'm trying to run a simulation of Tropical Cyclone Ita in Queensland, Australia. I'm also using WWMIII. The model ran, and the air_pressure and significant wave height fields look ok to me, but not the sea level (elev variable). I was expecting to see high values of elev on the cyclone path, but I can't see anything really, it looks to be just tides (see attached figures).

Does anyone have any idea what I'm missing here? An option in param.nml that needs to be activated perhaps, or some parameter that needs to be modified?

Thank you!
Emilio

[josephzhang8]

Storm surge applications usually require a large domain extent to allow wind induced setup to equilibrate.

…

-Joseph Joseph Zhang Office: (804) 684 7466 Web: schism.wiki

________________________________ From: Emilio Echevarria ***@***.***> Sent: Friday, June 7, 2024 9:26 PM To: schism-dev/schism ***@***.***> Cc: Subscribed ***@***.***> Subject: [schism-dev/schism] Missing inverse barometer effect? (Issue #139) [EXTERNAL to VIMS received message] Hi all, I'm very new to SCHISM. I'm trying to run a simulation of Tropical Cyclone Ita in Queensland, Australia. I'm also using WWMIII. The model ran, and the air_pressure and significant wave height fields look ok to me, but not the sea level (elev variable). I was expecting to see high values of elev on the cyclone path, but I can't see anything really, it looks to be just tides (see attached figures). Does anyone have any idea what I'm missing here? An option in param.nml that needs to be activated perhaps, or some parameter that needs to be modified? SCHISM_output_mslp.png (view on web)<https://github.com/schism-dev/schism/assets/36142422/f52bdcce-a53d-4f2f-ab11-96dead850b06> SCHISM_output_Hs.png (view on web)<https://github.com/schism-dev/schism/assets/36142422/604bef9c-da27-42a3-99f4-5799db509dcd> SCHISM_output_elev.png (view on web)<https://github.com/schism-dev/schism/assets/36142422/862c7c48-45ef-4ebd-8c85-063ec9acb99c> Thank you! Emilio — Reply to this email directly, view it on GitHub<#139>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AFBKNZ7RROASBWO4LELI24DZGJMVTAVCNFSM6AAAAABI7RFDT2VHI2DSMVQWIX3LMV43ASLTON2WKOZSGM2DCMZUGI3DSOI>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[EmilioEchevarria]

Thank you @josephzhang8, I know the set up is not ideal... but I did manage to run other examples with relatively small grids and saw a much higher storm surge due to low atmospheric pressures, I imagine related to an inverse barometer effect.

Just to be sure, is there any option in SCHISM that deactivates this effect?

[hot007]

I would say the Qld tile is not particularly small, either, surely we're going about 3-400km offshore here... it may not be equilibriating in that distance but I'd expect to see some IB effect unless for some reason it's very small, which seems surprising in the context of a tropical cyclone.