Search found 24 matches
- June 16th, 2022, 3:27 pm
- Forum: 13. Source attribution methods
- Topic: Solutions for Section 13.5
- Replies: 1
- Views: 19700
Re: Solutions for Section 13.5
The "results" folder is used to store HYSPLIT simulation results. This section actually uses the source-receptor file srm.bin created in section 13.4. There are no new HYSPLIT runs. The statistical results and figures are included in the tutorial html pages.
- June 15th, 2022, 4:51 pm
- Forum: Dispersion Model
- Topic: Does a dispersion model that goes backward provide useful informaiton?
- Replies: 1
- Views: 1165
Re: Does a dispersion model that goes backward provide useful informaiton?
Yes, the backward dispersion run by setting the integration time to a negative value gives useful information. The results provide the source-receptor sensitivities (which are sometimes called the footprint of the receptors/measurement). The forward model runs can provide such information as well. I...
- April 27th, 2022, 2:18 pm
- Forum: Dispersion Model
- Topic: Deposition
- Replies: 1
- Views: 1552
Re: Deposition
Yes, your approach is correct in general. (26) 1 (Number of pollutants: I have one pollutant, pm2.5) (27) 0.8. 2, 1 (Diameter, density and shape: I used Rolph et al. 2009 as reference.) They are fine. 28(2)- Deposition velocity (m/s), Pollutant molecular weight (Gram/Mole), Surface Reactivity Ratio,...
- June 18th, 2021, 4:14 pm
- Forum: 14. Wildfire smoke and dust storms
- Topic: Multiple fires at the same time?
- Replies: 4
- Views: 30313
Re: Multiple fires at the same time?
Heat will be important to calculate releae height for smoke emission (see section 14.1).
The example in 16.5 is for volcanic ash applications where the emission heights are explicitly provided in the EMITIMES file. In this case, HEAT is not used.
The example in 16.5 is for volcanic ash applications where the emission heights are explicitly provided in the EMITIMES file. In this case, HEAT is not used.
- June 18th, 2021, 3:30 pm
- Forum: 11. Pollutant transformations and deposition
- Topic: vehicular emissions
- Replies: 1
- Views: 22261
Re: vehicular emissions
Although this thread is titled as "vehicular emissions", the content seems to indicate you are interested in straw stubble burning. It is possible to only issue burning permits when smoke generated from stubble burning has less effect to human health (e.g. smoke will not transport to populated area)...
- June 17th, 2021, 12:07 pm
- Forum: 6. Trajectory statistics
- Topic: Interpreting Ensemble Results
- Replies: 5
- Views: 21287
Re: Interpreting Ensemble Results
Yes, I agree. Because of the stochastic feature of atmospheric flow, it is always better to have multiple trajectory runs instead of only relying on a single trajectory.
- June 16th, 2021, 4:32 pm
- Forum: 8. Configuring the CAPTEX simulation
- Topic: #8.1 - check for release of 201kg
- Replies: 4
- Views: 28815
Re: #8.1 - check for release of 201kg
It is normal to have the max/min values differ from the results shown in the tutorial. However, if the differences are too much it may indicate something wrong.
- June 16th, 2021, 4:24 pm
- Forum: 8. Configuring the CAPTEX simulation
- Topic: #8.1 - check for release of 201kg
- Replies: 4
- Views: 28815
Re: #8.1 - check for release of 201kg
'KG' at the very top shows the grid number. After a long list of "Namelist configuration", you will see the following ------------- Start computation messages ------------------- NOTICE advrng: (kg ,xyr,xy1) - 1 10 10 19 19 NOTICE metpos: (mtime,ftime) - 44039100 0 NOTICE metpos: (mtime,ftime) - 440...
- July 6th, 2020, 7:08 pm
- Forum: Radiological
- Topic: Long-term dose estimation with con2rem
- Replies: 2
- Views: 19626
Re: Long-term dose estimation with con2rem
The explanation can be found in the user guide. Additional decay time can be added using this field to estimate long-term doses. This calculation applies to either -t option but only for deposition doses. This option permits longer-term doses to be computed by adding additional decay to the existing...
- June 26th, 2020, 6:45 pm
- Forum: 15. Radioactive pollutants and dose
- Topic: Obtaining the concentration multiplier
- Replies: 3
- Views: 28398
Re: Obtaining the concentration multiplier
I believe the inhalation pathway that affects lungs is more important for radionuclide in the air. Inhalation conversion factor for Cs-137 used at NOAA is 4.60E-09 Sv/Bq. As 1 rem = 0.01 sievert (Sv), this Cs137 factor is 4.60E-11Rem/Bq The dose to human lungs due to breathing in Cs-137 in the air w...