Search found 8 matches
- Thu May 08, 2025 11:11 am America/New_York
- Forum: Home
- Question: How to download NLDAS Primary forcing data for one variable in specific region
- Replies: 4
Re: How to download NLDAS Primary forcing data for one variable in specific region
I am not sure why you are getting ~2000 files. If you are trying to download three years of hourly data, that means there should be 3*365*24 = 26280 individual NetCDF files, each with one timestep. Of course, downloading and processing ~26000 files to get a timeseries at one ___location is not very eff...
- Thu May 01, 2025 2:49 pm America/New_York
- Forum: Home
- Question: GLDAS surface water component derivation
- Replies: 7
Re: GLDAS surface water component derivation
The GLDAS data do not quantify the amount of river, lake, and reservoir storage. You will likely want to consider another data source. If you wanted to take a model-based approach, you could use a model that explicitly represents river, lake, and reservoir storage (perhaps you could force the model ...
- Thu May 01, 2025 12:32 pm America/New_York
- Forum: Home
- Question: Downloading NLDAS Primary Forcing Data L4 Hourly
- Replies: 6
Re: Downloading NLDAS Primary Forcing Data L4 Hourly
If you have a list of links, you can download them straight into R using the httr or curl R packages. You may also be interested in the earthdatalogin package here: https://cran.r-project.org/web/packages/earthdatalogin/index.html. If you need a reference for how to manipulate NetCDF files in R, thi...
- Tue Apr 29, 2025 3:08 pm America/New_York
- Forum: Home
- Question: How to download NLDAS Primary forcing data for one variable in specific region
- Replies: 4
Re: How to download NLDAS Primary forcing data for one variable in specific region
Hi Janette, I will try to address each of your questions. 1. Long list of download links Which tutorial are you following? There is a "Download Instructions" button that appears upon getting the list of URLs from the subsetting tool. The next step is to use this list of URLs to download al...
- Thu Apr 24, 2025 11:28 am America/New_York
- Forum: Home
- Question: Support for NetCDF Forcing Files in LIS Simulation – NLDAS-2 Compatibility Issue
- Replies: 1
Re: Support for NetCDF Forcing Files in LIS Simulation – NLDAS-2 Compatibility Issue
The NLDAS-2 v002 GRIB-1 data are no longer archived at GES DISC. We updated to NLDAS-2 v2.0, which are the same data but converted to NetCDF format. Please refer to https://disc.gsfc.nasa.gov/datasets/NLDAS_FORA0125_H_2.0/summary. If you need GRIB-1 format for compatibility with the older version of...
- Fri Apr 04, 2025 9:08 am America/New_York
- Forum: Home
- Question: Snow Water Equivalent (SWE) Dataset
- Replies: 1
Re: Snow Water Equivalent (SWE) Dataset
Hi Shani, You can use the variable SWE_inst ("snow depth water equivalent") from GLDAS NOAH 2.0. You can see a list of GLDAS outputs in the README file for the GLDAS data products, which can be found on each of our GLDAS data collection landing pages at GES DISC, e.g. here: https://disc.gs...
- Wed Feb 12, 2025 4:13 pm America/New_York
- Forum: Home
- Question: GLDAS surface water component derivation
- Replies: 7
Re: GLDAS surface water component derivation
Hi Gaurav, I am not sure that using runoff as a proxy for river and lake storage is a good strategy. In the GLDAS models, runoff, along with precipitation and evapotranspiration, is a flux out of (or into) a grid cell. To calculate groundwater storage change (dGW), you are using an equation like thi...
- Tue Feb 11, 2025 4:39 pm America/New_York
- Forum: Home
- Question: GLDAS surface water component derivation
- Replies: 7
Re: GLDAS surface water component derivation
Hi Gaurav, Like Andrew said, surface water might mean different things in different contexts. In the context of the paper you linked, surface water (storage) is defined as the residual in the water balance equation (Equation 2 in the paper) when you subtract groundwater storage, soil moisture, and s...