Where can I pull Daymet data ? Opendap or Thredds?

[kpuln]

In the past, I've been able to download Daymet data from the following:
- https://www.earthdata.nasa.gov/data/catalog/ornl-cloud-daymet-daily-v4r1-2129-4.1

... and then:
- https://opendap.earthdata.nasa.gov/thredds/catalog/ornldaac/2129/tiles/catalog.html

Unfortunately, the above URL is no longer available and suggests that the data has moved to on of the Thredds cloud servers. After registering with https://urs.earthdata.nasa.gov/, it seems that the https://thredds.daac.ornl.gov server redirects back to the Opendap servers.

My thoughts are that the new URL would be: https://thredds.daac.ornl.gov/thredds/catalog/ornldaac/2129/tiles/
but that is not the case.

Can anyone advise and point me in the right direction..?

Also, when I last checked, the data catalog contained data up to 2024, what I'd like to do is download any of the 2025 available data.

Thank you in advance,

KP

[ORNL-EDL - mthornton]

Hello kpuln,
Thank you for your interest in the Daymet dataset. Daymet access tools and services have been updated. Here is a list of current access methods for Daymet daily data files:

AppEEARS : https://appeears.earthdatacloud.nasa.gov/

Daymet Single Pixel Extraction Tool: https://daymet.ornl.gov/single-pixel/

Earthdata Search Direct Download : https://search.earthdata.nasa.gov/search?q=Daymet_Daily_V4R1_2129&ac=true

OPeNDAP : https://opendap.earthdata.nasa.gov/collections/C2532426483-ORNL_CLOUD/granules/Daymet_Daily_V4R1.daymet_v4_daily_na_tmax_2023.nc.dmr

OPeNDAP URL with indexing subset:
https://opendap.earthdata.nasa.gov/collections/C2532426483-ORNL_CLOUD/granules/Daymet_Daily_V4R1.daymet_v4_daily_na_tmin_2024.nc.dap.nc4?dap4.ce=/y[5000:1:6000];/x[4000:1:5000];/tmin[0:1:0][5000:1:6000][4000:1:5000]
Keep in mind that Daymet is projected and OPeNDAP works on index ranges.

I hope this is helpful. Let me know if you have any questions.
Best wishes,
Michele

[j.seider_7]

Are the Daymet data available through the 'appeears' R package? I have tried to access the product through that API but I get an error saying that the product does not exist. I have also tried the 'daymetr' package but errors in that were what tipped me off to the appeears api in the first place.

[LP DAAC - dgolon]

Hi @j.seider_7 we do not have a specific AppEEARS R Package. Is there one you have found online? We do have an API version of AppEEARS where you can access the data via Python or R. Here is documentation on the AppEEARS API: https://appeears.earthdatacloud.nasa.gov/api/ please send us a screenshot of any errors you might be seeing if that is what you are using or a link to the "AppEEARS R Package" you have found.

[LP DAAC - dgolon]

Just noting we do have a few R resources here: https://github.com/nasa/AppEEARS-Data-Resources you may find useful.

[j.seider_7]

Interesting! Thanks for those resources, I will take a look.

For reference, here is the package I was referring to: https://github.com/bluegreen-labs/appeears
Seems likely it is just a wrapper for other means of accessing the AppEEARS API.

[LP DAAC - dgolon]

Hi @j.seider_7 Thanks for sharing that link, I passed it along to our AppEEARS team for their reference. It is not something we created, so we can't really speak to it or help with any issues you are seeing with it. However, if you have any questions on the links I sent earlier, just let us know and we'd be happy to answer them. Thanks -- Danielle