Regional downscaling of climate projections?

[jivica]

Dear all,

General question to ROMS users regarding CMIP5 (and/or CMPI6) regional downscaling;

Have you done some of the studies for a) short-range (i.e. 2030 - 2050) scenarios with 4.5 or 8.5 emissions, and if you did what you used for b) atmospheric forcing as well as c) ocean boundary conditions?

Any comments/thoughts/links would be helpful.

Regards,
Ivica

[drivas]

This paper can help you:

https://doi.org/10.1016/j.jmarsys.2019.103207

If you need further information about these experiments, I can check. I've also been doing downscaling of CMIP experiments, if you're interested in the details.

David

[vincentcombesOSU]

In addition to Davis Rivas' paper, you can also read this one:
"A Dynamically Downscaled Ensemble of Future Projections for the California Current System"

https://www.frontiersin.org/articles/10 ... 12874/full

[drivas]

And I meant CMIP6 experiments...

[jsouza]

Hi Ivica.

We are doing a downscaling of CMIP6 scenarios SSP3 7.0 and SSP2 4.0 for New Zealand - and a reference hindcast. So similar to the scenarios you cited.
In our case, the ROMS domain is nested inside a coupled model simulation (NZ-ESM), while the atmospheric conditions are provided by a statistical downscaling of this model. This was important to have consistency between the ocean and atmospheric forcing.
There were a lot of factors to be taken into account in choosing the simulation to downscale from, such as available scenarios, resolution (space and time) of parent model results, etc. Especially since we are interested in the coastal area.
For this same reason, we also included additional processes absent from the parent simulation - tides and inverse barometer.
Our initial results look promising.
Happy to discuss more!

Cheers

Joao

[hermann]

Hi Ivca,

Here's a paper by Drenkard et al. with summaries of many downscaling studies:
https://academic.oup.com/icesjms/articl ... login=true

Some recent ROMS-based CMIP5/CMIP6 downscaling to the Bering Sea, with discussion of methods, is described in the following publications:

https://www.sciencedirect.com/science/a ... 4521000515
https://www.sciencedirect.com/science/a ... 4521000503
https://academic.oup.com/icesjms/articl ... login=true
https://www.sciencedirect.com/science/a ... via%3Dihub

Hope these are helpful.

-Al Hermann