Backward Trajectory Model Run
Posted: February 26th, 2014, 7:04 am
Hi there,
I am new to HYSPLIT and am using it for my thesis to run backward-trajectory analyses and have a few questions pertaining to the model. I have read through all the FAQs and help files regarding the questions below but have yet to find satisfactory solutions. I am currently using the web version as I do not yet have many backward-trajectories to run. I seek your advise on the following:
1.) Under "Model Run Details" of the model, does "Level 1 height" (together with Level 2 and 3 heights), represent the release height of the particle? I am trying to trace radon in the atmosphere as I already have previously collected radon concentration data from a 230m tall tower - the gas inlet is at 222m. The pressure readings have been in the range of approximately 850 - 980mb. The site is located approximately 400m above sea level. What height should I input into the field?
2.) What will the ideal number of hours to run the model for to minimise any sort of trajectory calculation error? I am trying to trace radon from within the UK and possibly slightly further afield in the Atlantic.
3.) Would you recommend running only 1 trajectory at a time at a single height?
I apologise in advance for any questions that may seem elementary in nature.
Thank you very much!
Xu
I am new to HYSPLIT and am using it for my thesis to run backward-trajectory analyses and have a few questions pertaining to the model. I have read through all the FAQs and help files regarding the questions below but have yet to find satisfactory solutions. I am currently using the web version as I do not yet have many backward-trajectories to run. I seek your advise on the following:
1.) Under "Model Run Details" of the model, does "Level 1 height" (together with Level 2 and 3 heights), represent the release height of the particle? I am trying to trace radon in the atmosphere as I already have previously collected radon concentration data from a 230m tall tower - the gas inlet is at 222m. The pressure readings have been in the range of approximately 850 - 980mb. The site is located approximately 400m above sea level. What height should I input into the field?
2.) What will the ideal number of hours to run the model for to minimise any sort of trajectory calculation error? I am trying to trace radon from within the UK and possibly slightly further afield in the Atlantic.
3.) Would you recommend running only 1 trajectory at a time at a single height?
I apologise in advance for any questions that may seem elementary in nature.
Thank you very much!
Xu