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I love your B&W version of the cross hatched patterns. It is like you say yourself: “the shapes illustrating the magic world of wind patterns in the atmosphere”. We are walking on the bottom of an gaseous ocean formed by the the troposphere.
I think the answer for your puzzle is to realize that what seems to be one cloud can be different layers of clouds. When there are layers of the same kind of clouds we classify them as duplicatus. Winds high up there differ very much with height and that way you can find cross hatched patterns. The differences in wind directions at different levels betray the duplicatus nature of the clouds.
This is a nice example on the gallery: Duplicatus.
That is a nice question Ramona. i will try to annswer it.
In fact the colors of a corona and the colors of an iridescent cloud are both caused by the diffraction of light by small particles or tiny water droplets. When the droplet or particle sizes are varying a lot the pattern will be rather chaotic. In the case of a corona the particles have to be rather uniformly sized to give the regular pattern of rings. The smaller the size of the water droplets is, the larger the corona is. And when the sizes of the droplets are (almost) everywhere the same, the pattern of a corona is symmetric and circular.
Here is an example of a partial corona Solar corona and iridescence . Where the pattern becomes more chaotic it is named iridescence.
Here is an example from the gallery of a corona with very irregular rings showing the differences in sizes of the (water) particles that cause the diffraction: Irregular rings
So in my opinion there is not much difference between iridescent clouds and a partial corona except that a corona is a more specific appearance of iridescence surrounding the sun or moon. So the images you posted show me a corona and iridescence as well. The rule of thumb I use, is that a corona does not need to be a full circle to be a corona and that iridescence becomes a corona when it is somehow (partly or fully) encircling the sun or moon. I hope you like it. Any other opinions are welcome btw.
Dear Bonny and Amanda, I suggest you address you question per mail to the general e-mail account of the CAS Community: community@cloudappreciationsociety.org.
Success!
Hans
Thanks Michael and it is great to read you have seen the Holmboe develop from undulatus. Great images. Clouds can develop in such a surprising way.
Now that you pointed it out Keelin, I can see the devil too in the Details. Now I realize that it would also fit in your Halloween series. Maybe Made For Each Other? Yes a good eye as Michael himself must have too to spot what’s on #242. Very feathery and light.
I tried to leave out any devil in next details but I am not absolutely sure I succeeded. I may be sure after a thorough inspection by Keelin. I look forward to it.
More Details
I had to laugh about the reactions on my “Purple But No Rain”. The replies made me dust my archive where I got it from, but I don’t think it will help anymore.
I hope you found your rain hat in time Keelin and Michael seems to be in need of one too watching this shelf cloud approaching. Ruth will be safe Staying On Land. A lovely wide view!Pastels
Something odd with tis thread. I just tried to upload a picture first. That worked well but editing does not make appear the lowest part of the box. The text about the order of the three pictures by Kathleen seems to be a bit of a problem for the system. Anyway….
Kathleen, I scrolled a lot back and found your 22 degrees halo with contrails and shadows crossing it. I love it. I hope the last one did not crash on your house. It looks dangerously.
I also love the sky texting by Keelin and the pink ribbons, by Ruth as well.Kathleen you asked how many contrails one has spotted on one picture. Well I don’t want to discourage you but this one is from my archive. I live in the neighborhood of an airport so maybe that is a bit cheating. Just check it. For the ease of counting I added white lines on each separate contrail.
I counted 26 contrails. Oops.
Love your gees, sea gulls and swans Ruth. They remind me having seen a lot of cranes migrating in February 2022 above Belgium. They make a lot of noise. I think it was to coordinate their drawing of Snoopy in the sky.
Grus Grus
There is so much above to enjoy that I had to scroll back. Love your ‘Hot Enough To Pop Corn’ Keelin. Also love the impressive shelf cloud by Michael in #1322, as well as the great and funny text you added. And Ruth I can imagine it is your ‘Favorite Spot’. Some great crepuscular rays.
Purple But No Rain
Ariel, I forgot to tell about the upload of an image. When you click on the icon for an image above the box you write a new reply, a box will appear to upload a picture. To upload an image you have to click on the text at the right of the box. For some reason the text and the link underneath is not centered well. After clicking at the right side where a bit of the text can be seen, the dialogue starts to upload an image and it will work as usual.
Thanks Duncan. A nice golden Phoenix. It reminds me of an old one on the gallery:
Phoenix with one wing on fire yet
The description on the gallery is not correct by the way. It says it shows a circumhorzon arc, but that was impossible at the time of year I took it. It was the lower part of 22 degrees halo. About the phoenix there is no mistake at all.
I’ve been away for far too long but I didn’t miss following the fun above. Keelin your ‘Demonesse and companion’ and your ‘Wizard watch’ are marvelous. I love the Wizard watch, but I must confess that your drawing made it perfectly clear. Once seen….. Halloween has truly inspired you. Hungry? is simply terrifying. I am glad it are all clouds.
Duncan your dragon at sunset seems to bite its own tail.
Next one flew over on Cloud Celebration Day and it is in color on the Cloud Memory Atlas.
It’s Not Dead, It’s A Parrot
Ariel I read about your seven years of sky on your website and I must say it makes a really deep impression on me. You still managed to collect a lot of wonderful cloud stories and silver linings as you like to name them. I admire you having been able to collect them over so many years and to share them on your website. Keep enjoying them!
I will try to ID the halos on the last 7 images on the page you linked to (skyj). I suppose there are some you already know, but it is better to be complete I think.
- a 22 degrees halo.
- a 22 degrees halo, a circumscribed halo, a sundog at the place where the parheic circle crosses the circumscribed halo, and the parhelic circle. I think this one is a real beauty.
- a circumscribed halo, a sundog at the place where the parheic circle crosses the circumscribed halo, and the parhelic circle. On this one the 22 degrees halo is not visible and I suppose we see the circumscribed halo and not the 22 degrees halo because of its egg-like shape.
- a 22 degrees halo with the upper tangent arc on top of it together with two sundogs with small parts of the parhelic circle although one can say these white tails are part of the sundogs themselves.
- a 22 degrees halo with a sundog and the upper tangent arc (UTA). it is faint but just above the UTA I think there is a suncave parry arc. But without a doubt ther is at twice the distance of the UTA a circumzenithal arc.
- as 5, but with both sundogs visible.
- same as 6, but here is more to discover. The suncave Parry arc is visible as a little roof above the UTA and the CZA touches a faint supralateral arc (I guess).
Where halos are a bit faint they often can be revealed more explicit by different kind of enhancements like contrast, saturation or even b-r subtraction. The last method can give very surprising results. I once got the link with this method from Alec Jones and maybe you like to try it:
I hope you like it.
Best wishes, Hans
