I am using ERA5 data as input for Hysplit model. I used the branch program you provide in ‘/hysplit/data2arl/era52arl’ to convert ERA5 GRIB files to ARL, at first, the ‘era52arl.cfg’ is produced autimativelly. I think it is right, so I did not change it. I use this command ’./era52arl -dera52arl.cfg -iDATA.GRIB -aSFC.GRIB -fSFC2.GRIB -oDATA.ARL’ to do the converting without any problem( the SFC.GRIB and SFC2.GRIB is the same, because I am a little confused about ” -f[input grib1 forecast surface fields name {SFC2.GRIB}]” in the Readme_era52arl.txt.), but when I use the ARL file to calculate trajectories, I found that the precipitation along trajectories is always zero, then I thought that maybe the reason is in ERA5 GRIB data, the unit of precipitation is ‘m’, so the number is too small. Then I multiply 1000 to ‘precipitation in ERA5 GRIB file, did the conversion again, then I used this new ARL in calculation, now the precipitation along trajectories seems right, but the value is not the same with in ERA5 GRIB or ERA5 netcdf file. For example, when I start a back-trajectory calculation for 22 03 01 00, at S32E160, along the trajectory, the output precipitation is 4.1, but in ERA5, it is 6.776.(To confirm this, the python code I use to read precipitation from ERA5 single pressure layer dataset it given below:
f = Dataset('/scratch/w40/ym7079/ERA5_nc/sfc/tp_era5_oper_sfc_20220301-20220331.nc',mode = 'r') # S32E160
pre_dataset = f.variables['tp'][0,488,1360]*1000
print('rainfall in dataset',pre_dataset)
6.7764 # in Hysplit, precipitation along trajectory at 22030100 S32E160 is 4.1mm
I
The other question is that in ARL, there is a new variable ‘DIFW’, I can not completely understand this, but the ‘Hysplit User guide’ does not give a detailed explaination.
about ERA52ARL conversion and output precipitation along trajectories
Post questions and find resources to convert meteorological data into a format HYSPLIT can read.
Return to “Conversion programs”
Jump to
- HYSPLIT
- ↳ Users
- ↳ Developers
- ↳ Bugs
- ↳ Announce
- ↳ General Comments
- ↳ Trajectory Model
- ↳ Dispersion Model
- ↳ User Applications
- ↳ In-line WRF-HYSPLIT coupling
- HYSPLIT Platform Specific
- ↳ HYSPLIT for PCs
- ↳ HYSPLIT for Mac OS X
- ↳ HYSPLIT for LINUX
- ↳ HYSPLIT on the READY Server
- Meteorological Data
- ↳ General questions on meteorological data needed for HYSPLIT
- ↳ Conversion programs
- ↳ Repositories of HYSPLIT formatted data
- ↳ MeteoInfo Software
- HYSPLIT Research
- ↳ Volcanic Ash
- ↳ Wildfire Smoke
- ↳ Dust
- ↳ Chemicals
- ↳ Radiological
- ↳ Cluster Analysis
- HYSPLIT Workshop
- ↳ 2022 HYSPLIT Workshop Questions
- ↳ 1. Installing HYSPLIT
- ↳ 2. Testing the installation
- ↳ 3. Gridded meteorological data files
- ↳ 4. Trajectory calculations
- ↳ 5. Trajectory options
- ↳ 6. Trajectory statistics
- ↳ 7. Air concentration calculations
- ↳ 8. Configuring the CAPTEX simulation
- ↳ 9. Air concentration parameter sensitivity
- ↳ 10. Alternate display options
- ↳ 11. Pollutant transformations and deposition
- ↳ 12. Air concentration uncertainty
- ↳ 13. Source attribution methods
- ↳ 14. Wildfire smoke and dust storms
- ↳ 15. Radioactive pollutants and dose
- ↳ 16. Volcanic eruptions with gravitational settling
- ↳ 17. Custom simulations
- ↳ 2021 HYSPLIT Workshop Questions
- ↳ 1. Installing HYSPLIT
- ↳ 2. Testing the installation
- ↳ 3. Gridded meteorological data files
- ↳ 4. Trajectory calculations
- ↳ 5. Trajectory options
- ↳ 6. Trajectory statistics
- ↳ 7. Air concentration calculations
- ↳ 8. Configuring the CAPTEX simulation
- ↳ 9. Air concentration parameter sensitivity
- ↳ 10. Alternate display options
- ↳ 11. Pollutant transformations and deposition
- ↳ 12. Air concentration uncertainty
- ↳ 13. Source attribution methods
- ↳ 14. Wildfire smoke and dust storms
- ↳ 15. Radioactive pollutants and dose
- ↳ 16. Volcanic eruptions with gravitational settling
- ↳ 17. Custom simulations
- ↳ 2020 HYSPLIT Workshop Questions
- ↳ 1. Installing HYSPLIT
- ↳ 2. Testing the installation
- ↳ 3. Gridded meteorological data files
- ↳ 4. Trajectory calculations
- ↳ 5. Trajectory options
- ↳ 6. Trajectory statistics
- ↳ 7. Air concentration calculations
- ↳ 8. Configuring the CAPTEX simulation
- ↳ 9. Air concentration parameter sensitivity
- ↳ 10. Alternate display options
- ↳ 11. Pollutant transformations and deposition
- ↳ 12. Air concentration uncertainty
- ↳ 13. Source attribution methods
- ↳ 14. Wildfire smoke and dust storms
- ↳ 15. Radioactive pollutants and dose
- ↳ 16. Volcanic eruptions with gravitational settling
- ↳ 17. Custom simulations
- ↳ 2019 HYSPLIT Workshop Questions