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Use absolute values for flux #24
On Thu, Dec 21, 2017 at 12:23 AM, Santiago Arellano wrote:
I agree that the final reported value should be positive for both flux and plume width.
There is a file generated with the program, called ‘FluxLog’ that records the increments of the total flux along the route. This one has positive or negative values for the reasons already explained. I guess this file is used by the program for the calculations, but it lacks a header or any sort of explanation for a user to understand what it means. Maybe this could be modified somehow.
From: Kern, Christoph
Dear Bo and Diana
Of course it's true that we need to keep the sign during the integration of each segment of the traverse to avoid problems e.g. caused by serpentine roads. However, it would be possible to take the absolute value of the final flux before it is displayed in the software.
I initially thought this was of minor concern, but I have recently gotten several questions from people about the negative flux. It seems that the negative sign is throwing people off, making them not believe their results, or at least causing unnecessary confusion. I recommend we display the absolute value of the final result (unless I am overlooking something here).
On Wed, Dec 20, 2017 at 2:45 AM, Bo Galle wrote:
It should be left as it is. Sometimes, for example in driving on a serpentine road up a mountain, you keep going back and forth through the plume. Then having different sign depending on traverse direction is necessary, to avoid counting the same plume twice. Thus, depending on traverse direction, the total flux may be positive or negative. At the end of course the value is always positive.
I hope this was not too confusing...
Best Regards and Merry Christmas,
Från: Norgaard, Diana
I noticed that the flux calculations and plume width can be negative at times. Christoph explained why, but felt the final value should be positive. He wanted me to check with you guys first though before making this change in case there's a reason to leave it as is.