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Ever wonder why you get so sleepy during conference talks? Turns out lots of conference venues aren't well-ventilated, causing CO2 to rise to levels that cause drowsiness (>1000ppm). Data from @keflavich shows this steady rise over the first 50min of a conference session. 
The organizers at #MW_Link2019 have done a great job since of keeping windows and doors open. Here is an updated, going until noon. Coffee break is obvious at 10:50, and improved ventilation when the session restarted at 11:20.
By request, here is a plot update from @keflavich (folks reasonably requested the axes labels, I unreasonably requested a dragon 🐉🐉).
(and from @keflavich on day 4 of the conference when the organizers were very cognizant of the issue and only closed the doors when noise required it.)
Totally unrelated note to science twitter folks: always label your axes… apparently your off-hand just-for-fun twitter post may get more attention than all your serious science posts combined 😳
A common question that was answered by @keflavich, but I’ll repeat it here for clarity - he used this meter co2meter.com/collections/de… and this code: github.com/vfilimonov/co2… to produce the CO2 plots.
And you can now read more about this on the Washington Post now from @_cingraham: washingtonpost.com/business/2019/… !!
Finally, a mad shoutout to #MW_Link2019 organizers for immediately correcting this issue at our conference and overall hosting a phenomenal conference here in Helsinki (including fantastic food, with vegan and gluten-free LABELLED options at every meal ! huzzah!).
