CAM-chem: No data found

Naser Mohammadzadeh

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Nov 14, 2023, 9:00:31 PM11/14/23

to wrf-chem-mozbc

Hello

I want to download cam_chem data from the website "https://www.acom.ucar.edu/cam-chem/cam-chem.shtml". But I have faced with this error:

There were problems accessing the data:Error contacting the NCAR Research Data Archive.

Do you face this error?

Thank you

Naser

Shawn Honomichl

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Nov 15, 2023, 8:49:24 AM11/15/23

to Naser Mohammadzadeh, wrf-chem-mozbc

Hi Naser,

It's possible that the NCAR Research Data Archive was temporarily down when you made the data request. I tried the page and didn't have any issues. As long as you are requesting data between 2001-2020 (and maybe even through 2022 as of now) the request should go through. Let me know if you continue to have any issues.

-Shawn Honomichl

Saqib Ahmad Zargar ce21d023

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Nov 15, 2023, 8:56:37 AM11/15/23

to Shawn Honomichl, Naser Mohammadzadeh, wrf-chem-mozbc

Dear Shawn,

I tried to download WACCM output files for June 2023 and faced the same error.Any idea when this problem gets sorted?

Saqib

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Shawn Honomichl

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Nov 15, 2023, 9:02:20 AM11/15/23

to Saqib Ahmad Zargar ce21d023, Naser Mohammadzadeh, wrf-chem-mozbc

Hi Saqib,

Which web location were you trying to download from? I will test it out and see if I can reproduce the issue.

-Shawn

Saqib Ahmad Zargar ce21d023

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Nov 15, 2023, 9:06:39 AM11/15/23

to Shawn Honomichl, Naser Mohammadzadeh, wrf-chem-mozbc

https://www.acom.ucar.edu/waccm/download.shtml

Region is (15S 40N 60W 104E)

Shawn Honomichl

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Nov 15, 2023, 9:18:23 AM11/15/23

to Saqib Ahmad Zargar ce21d023, Naser Mohammadzadeh, wrf-chem-mozbc

Okay, I was able to reproduce the error. I will email back once the issue is resolved.

-Shawn

Shawn Honomichl

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Nov 15, 2023, 10:20:23 AM11/15/23

to Saqib Ahmad Zargar ce21d023, Naser Mohammadzadeh, wrf-chem-mozbc

HI Saqib and Naser,

I spoke with our team and apparently the issues are on the NCAR Research Data Archive side of things with their data access protocol (DAP). They are getting ready to go down for scheduled maintenance so it may be related. Those activities are scheduled to wrap up on 20 November. In the meantime I would suggest trying to download directly from the RDA itself, since the primary operability of the site should still be active for another couple of days. The WACCM page is at https://rda.ucar.edu/datasets/ds313.6/, and the CAM-Chem page is at https://rda.ucar.edu/datasets/ds313.7/. Note that you may still be able to subset on the site, though you need to register with the RDA first if you haven't already. And if for whatever reason that doesn't work, for the CAM-Chem outputs you may have to wait until the maintenance is finished. For WACCM, if the RDA doesn't work you can also download files directly from https://www.acom.ucar.edu/waccm/register.shtml, but you won't have the subsetting option.