Skip to content

Latest commit

 

History

History
26 lines (25 loc) · 2.44 KB

RunningWithERA5Data.md

File metadata and controls

26 lines (25 loc) · 2.44 KB

Downloading data and running WRF with ERA5

ERA5 is a newer reanalysis product that has gotten a lot of positive feedback about how well it simulates past dates (not for forecasting) from 1979 to within 3 months of real time. Downloading the data, for now, is a bit tricky and can get very large.

To download:

  • Go to https://cds.climate.copernicus.eu/cdsapp#!/search?type=dataset&text=era5 and create an account (if you don't already have one).
  • You will need 2 datasets: ERA5 hourly data on pressure levels from 1979 to present and ERA5 hourly data on single levels from 1979 to present
    • For pressure level data, click the download data tab, select all fields within Pressure level and Variable. For Time, you can select all fields, or you can select incremental hours. Just make sure you change your namelist.wps to reflect the time interval you chose. For Product Type select Reanalysis. Then, select the dates of the data you want to download. Choose GRIB as the Format, agree to the terms of service, and then click Submit Form. Once you have done this, you will be taken to a queue where you can see the status of your download and when it is finished, you can download the data (or copy the URL and use wget on Eagle).
    • For surface data, click the download data tab, select the following fields:
      • Product Type: Reanalysis
      • Variable:
        • Popular: 10m u-component wind, 10m v-component wind, 2m dewpoint temperature, 2m temperature, Mean sea level pressure, sea surface temperature, Surface pressure
        • Temperature and pressure: select all fields
        • Wind: 10m u-component wind, 10m v-component wind
        • Snow: select all fields
        • Soil: select all fields
        • Other: Land-sea mask, Sea-ice cover
      • All other fields should be blank
      • Year / Month / Day: select the days that you want
      • Time: make sure you select the same times as above
      • Format: GRIB
      • Accept terms of service and click Submit Form. Download the data when it is finished or use wget as above.
  • Rename the files as you please (I have used era5_PRES.grib and era5_SFC.grib).

Running with ERA5:

  • Use the V-table for ERA-Interim.pl
  • Run WPS as if using ERA-Interim data.
  • '''NOTE: ERA5 data are hourly'''; therefore the interval should be changed from 21600 (6 hrs) to 3600 (or to whatever interval was downloaded).