Question about CO2 level's behaviour

[AutoflowerChief]

Hi all,

I just noticed a regular pattern in CO2 readings of my tent.

Remark: data readings are not 100% consistent as I was still fumbling with arranging the eqiupment.

But there is still a pattern: at the beginning of each light cycle, there is a boooom peak with a rise of CO2 readings (~600-800ppm) and then it goes down again just as quickly....

WHY is that?

Is it the plants giving us a good and extensive morning YYYAAAAAWWWWWNN?

Is it something temperature related influencing data readings for a short moment before some software corrects it again?

Perhaps over night accumulated humidity skyrockets when lights turn on, causing after a short moment the inline fan to do its job, that would explain the CO2 down. But leaves me with the question where does the tremendous CO2 up come from...

Please, someone, enlighten me...

Searched for some while but didn't find anything even in the slightest direction of an answer to that...

 

[Son of Hobbes]

CO2 is a byproduct of respiration. Your plants are respiring throughout the day as they photosynthesize, but once the lights go out, photosynthesis slows to a crawl, but they continue to respire. What you're seeing is the accumulation of CO2 from respiration from the dark cycle.

 

[AutoflowerChief]

Thank you, this I did already know, this is also the reason why you should not populate the room you sleep in with too much foliage of whatever kind...

I'll try to precise more....

<- part of the data stream for a single day, starting at 0:00 in axis origin. My Princesses enjoy a live rich with vibrant night life. They party through to 1:30AM, light fades out till 02:00 AM. Then they get 5 hours of downer induced sleep.

At 7:00 they will wake up because "sunrise" greets them and dims the light up again over 30min, the girls throw in their uppers and go party on....

Sooooo, with the graph starting at 0:00 on the left, the first part of the graph is actually the last 2 hours of my plants "day" cycle.
With lets say: absolutely no significant deviation in CO2 PPM at all, not at "dusk", not during night... stays practically the same.

And suddenly there is this monumental Colorado Plateau-like mountain. CO2 snaps up by 600 (50%) within TEN MINUTES...

data readings:
06:45 1101 ppm
06:50 1295 ppm
06:55 1746 ppm

Then it plummets down in similar fashion returning to 1269 ppm at 07:30.

Continuous respiration of plants over the night builds up CO2 level in what way? Continuously, of course.

Sir, with all due respect I'm sorry, but: under no means can this explain the "CO2 level explosion" observation I mean.

 

[AutoflowerChief]

SORRY, I can now answer the question myself. Often times you just have to formulate the right question to get the right answer... I had to change my direction of thinking turn around my question et voila:

Turns out one of my initial assumptions was guessed right. Sorry for the hazzle and me answering my own question. ^^