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NCAR / cesm-lens-aws

Examples of analysis of CESM LENS data publicly available on Amazon S3 (us-west-2 region) using xarray and dask
https://doi.org/10.26024/wt24-5j82
BSD 3-Clause "New" or "Revised" License
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Where is the lat/lon data? #61

Closed cspencerjones closed 3 years ago

cspencerjones commented 3 years ago

I have been using this tutorial to learn to access the CESM data: http://gallery.pangeo.io/repos/NCAR/cesm-lens-aws/notebooks/EnhancedIntakeCatalogDemo.html

It's been really helpful. But the tutorial doesn't tell me how to access latitude and longitude (just nlat, nlon). Can someone point me to that info?

If there are basin masks available somewhere, that would also be really helpful.

cspencerjones commented 3 years ago

@andersy005 or @bonnland , could you tell me whether there is a timeline on this? Is it worth me trying to use the lat/lon coordinates from the CMIP6 dataset (which are presumably the same), so that I can move forward?

I realize this issue is in some ways a continuation of #34 but that seems stale and maybe should be closed?

andersy005 commented 3 years ago

@cspencerjones,

Thank you for your patience!

It's been really helpful. But the tutorial doesn't tell me how to access latitude and longitude (just nlat, nlon). Can someone point me to that info?

As far as I know, lat& lon values are not output by the model... I've never seen CESM-POP output with lat and lon. I could be wrong though... Ccing @mnlevy1981 who knows more about CESM and POP.

If there are basin masks available somewhere, that would also be really helpful.

Have you had a chance to look at the region mask feature in pop-tools https://pop-tools.readthedocs.io/en/latest/examples/region-mask.html?

cspencerjones commented 3 years ago

Amazing! Thanks so much - this is exactly what I wanted to know. It looks as though pop-tools will give me everything I need if I can get it to install on the pangeo workers. I'll look into that.

Do you (or @mnlevy1981 ) know which pop grid is associated with the CESM-LENS output? e.g. POP_gx1v7, POP_gx1v6?

Then I will do a PR to the tutorial I am using so that this info is clear to all users.

cspencerjones commented 3 years ago

I'm realizing that the grid used to be stored at 's3://ncar-cesm-lens/ocn/grid.zarr' https://github.com/NCAR/cesm-lens-aws/issues/34#issuecomment-618365544. I think what I was originally asking is, does this dataset still exist? Because it doesn't seem to be at that path anymore. That would be preferable to the pop-tools solution.

cspencerjones commented 3 years ago

Sorry to comment more! Apparently what I am looking for is 's3://ncar-cesm-lens/ocn/static/grid.zarr'. This solves my issue. I will submit a PR to clarify various docs tomorrow. Thanks for your help.