WavedRhyme
New Member
Why is it everytime on a day where there is a clear sky and i see lots of persistent contrails the next day it is always so cloudy you cant see any sky at all?
Why is it everytime on a day where there is a clear sky and i see lots of persistent contrails the next day it is always so cloudy you cant see any sky at all?
There are times when there are persistent contrail blooms and cirrus which defy an easy explanation . . . they have been reported by NASA and others. . .
http://www.met.reading.ac.uk/~sgs02rpa/PAPERS/Haywood09JGR.pdf
However, this was on a weekend day if I remember correctly and there were many other aircraft over the UK . . . this one seemed to initiate a cascade of cirrus while the others did not seem too. . . . this effect has been witnessed before. . . and is not easily explained .. . .I still has an explanation though. A plane flying though a region ice supersaturated air. Just that in this case it was the only plane, and it flew in circles, so made an unusually dense and singular contrail.
However, this was on a weekend day if I remember correctly and there were many other aircraft over the UK . . . this one seemed to initiate a cascade of cirrus while the others did not seem too. . . . this effect has been witnessed before. . . and is not easily explained .. . .
I am not really disagreeing with you . . . what I am trying to say is that sometimes in the clear sky . . . where there appears to be no indication that cirrus clouds would form they sometimes bloom and the bloom can appear to be initiated by a single or a few events such as a persistent contrail . . . predicting such cascading events is not easily predicted . . .Not true. There were several other contrails from normal planes in that area. The was simply the most distinct and most concentrated one. The other contrails also contributed to the cirrus.
You can see the contrails outside the spiral area grow here:
I am not really disagreeing with you . . . what I am trying to say is that sometimes in the clear sky . . . where there appears to be no indication that cirrus clouds would form they sometimes bloom and the bloom can appear to be initiated by a single or a few events such as a persistent contrail . . . predicting such cascading events is not easily predicted . . .
Yes, I agree . . . the key is what pushes the occasional contrail into a bloom of cirrus and cirrus haze and when does it not . . . simply the amount of Ice supersaturated air . . . if so can we determine when this will happen via atmospheric soundings or not? I think this is an issue beyond just simple inquiry I think it has implications on how to mitigate climatic impact and explaining to chemtrail conspiracy advocates what is really going on . . .There are very specific and well understood reasons for that though. The difficulty is in measuring regions of ice supersaturation.
Contrails can form in clear blue skies where cirrus clouds will not form, because they add water, temporarily raising humidity.
The resultant cirrus will persist because cloud persistence occurs at a lower relative humidity than cloud creation.