Earthdata Forum

Good afternoon,

I'm currently working on a wildfire prediction project to help me better learn data science in my free time. I recently discovered the work that the Oak Ridge National Laboratory has done with DAYMET data, and I wanted to grab relevant data from their source to incorporate into my model.

Unfortunately, after trying to leverage a PyDaymet Python library, and directly accessing the "Daymet THREDDS Data Server", I was met with the realization that the server on which the data was previously stored had been taken down permanently. I've attached a screenshot to this post showcasing the webpage I'm met with when I attempt to access the "Daymet THREDDS Data Server" link directly.

I was wondering if there is a new resting place for this data, and how I could go about accessing it. If someone could provide an automated and manual approach for capturing this data, I'd be greatly appreciative! I'm very stuck on how to move forward on this problem.

I apologize in advance for any poor spelling, grammar, or lack of relevant tagging.

Thanks,
MoogCity

Hello MoogCity,

Thanks for your interest in Daymet data. Unfortunately, the access method you are attempting is no longer valid. We apologize for the inconvenience.

The NASA DAAC's are moving to cloud-based NASA Earthdata access methods through which the Daymet dataset is available.

You will find information Earthdata Daymet dataset access here: https://www.earthdata.nasa.gov/data/projects/daymet/data-access-tools

Subsetting is available through NASA Earthdata OPeNDAP in the Cloud: https://opendap.earthdata.nasa.gov/

Here is an OPeNDAP Server Data Request Form for an example daymet file :
https://opendap.earthdata.nasa.gov/collections/C2532426483-ORNL_CLOUD/granules/Daymet_Daily_V4R1.daymet_v4_daily_na_tmax_2023.nc.dmr

Hopefully, this helps.

Hannah Blanco
ORNL DAAC

Hello Hannah Blanco, I read your response to MoogCity regarding subsetting Daymet data. I looked at the links you supplied for how to download and subset the data. Is it true that I would need to know Python or R, etc... to download and subset the data? Is there not a simple interface such as the one you had a year ago, and that MoodCity referred to? Thanks, Dona

dona_horan wrote:
> Hello Hannah Blanco, I read your response to MoogCity regarding subsetting
> Daymet data. I looked at the links you supplied for how to download and
> subset the data. Is it true that I would need to know Python or R, etc...
> to download and subset the data? Is there not a simple interface such as
> the one you had a year ago, and that MoodCity referred to? Thanks, Dona

Hey there, Dona, I hope you're staying warm this time of year up in New York! I saw your comment, and I think I may be able to help ask your question after visiting some of the links that Hannah provided. I've attached a direct link to the site I'm referencing below, and I've also attached a few screenshots to hopefully help as well.

Link where you can access DAYMET information on a daily basis within a user friendly GUI (feel free to follow my steps below to get here): https://search.earthdata.nasa.gov/search?q=Daymet_Daily_V4R1_2129&ac=true

After clicking the first link that Hannah provided, you should be met with a screen that says "Daymet Data Access and Tools". If you scroll down a bit, you'll see few different sections with different datasets stored on the cloud. There are all different variants of the overall dataset (as I understand it). Some are daily data, others are monthly, and yearly, just read the corresponding text in the sections and then select the one you're interested in. (See screenshot 1, which I've attached :) ).

Once you've made it there, you'll end up where I've attached "screenshot_2". This is essentially a landing page for where the data you selected is stored. if you click "Data Access", you'll be prompted with a pop-up which will ask you where you want dow download data from. If you're after a no-code approach, I recommend that you select the "Earthdata Search" option (I've highlighted this in "screenshot_3". This will take you to a webpage with a GUI interface that will let you pull data for a specified time period and location for the fields that you're interested in. I highly recommend clicking "Take the tour" button which I've shown in screenshot_4 (Looks like the file size for the last screenshot was too large, so I couldn't attach it. I apologize).

Doing so will show you around the website and will explain to you what all of the different features of the site are.

Once you understand what the "Take the tour" button has shown you, you likely will be equipped to pull whatever data you're interested in!

I for one have tried looking into pulling data from 2010 for the entire state of Colorado. I specified the area I wanted to pull from of Colorado by specifying with a zipped folder of shapefile materials to hone in one data pertaining to the state of Colorado. I then selected the time frame I was interested in, chose the resulting set, then within that set, I selected all of the variables I was interested in downloading. From there I just downloaded everything locally.

Bingo! That did it and now I've got data for that time period. I sure hope that was helpful. Please let me know if anything is unclear. Have a wonderful evenign, and stay warm!