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How to get Horizontal Infrared Radiation Intensity or Opaque Sky Cover?

asked 2021-11-16 16:46:27 -0500

ajeb's avatar

updated 2022-02-19 08:05:46 -0500

I am trying to create my own EPW file for the first half of 2021.

I have all variables except for Horizontal Infrared Radiation Intensity or Opaque Sky Cover (I need at least one to complete my file).

Is there any method I can use to derive either variable? Or is there a satellite, bureau of meteorology database etc anyone is aware of that I could source this data from?

Thank you for any help you can provide.

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answered 2021-11-28 23:43:19 -0500

Joseph Yang's avatar

Horizontal Infrared Radiation is equivalent to 'surface thermal radiation' value available for all NWP models. If you need to look this up quickly, feel free to check out (disclaimer - I run this tool), based on ERA5 data from ECMWF. This should fit well under the free tier and you can download up to 6 months of data without signing up.

The parameters are named 'surface_thermal_radiation' and 'total_cloud_cover' (for the opaque sky cover).

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Thank you very much for this response! :) I will have look into this option.

I have also found NASA Power to generate hourly EPW files from as far back as the year 2000.

ajeb's avatar ajeb  ( 2021-12-06 22:38:47 -0500 )edit

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Asked: 2021-11-16 16:46:27 -0500

Seen: 416 times

Last updated: Nov 28 '21