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Ten Basic Clouds

noaa.gov

21–30 of 49 posts

Re: Ten Basic Clouds

#26
post #18

What I find fascinating objects of beauty are the ways different clouds modify light or are illuminated by different kinds of light, from the belt of Venus to different kinds of halos to crepuscular and anti solar rays. I remember that one time where anti-solar rays painted pole to pole "longitudes" on the hemispherical dome of the sky. It's too bad we don't have photographic memory, or at least I don't. It is such a…

I'm having trouble understanding the Belt of Venus one. Isn't purple expected to be there per ROYGBIV? Also the second image looks orange to me, not purple.

> It is a pinkish glow that surrounds the observer

This also makes no sense to me, or else maybe observer is jargon? But there's no hyperlink... The photographer certainly doesn't seem to be surrounded by a pinkish glow.

Is it just a name for the purple part of the spectrum?

Re: Ten Basic Clouds

#28
post #26
post #18

What I find fascinating objects of beauty are the ways different clouds modify light or are illuminated by different kinds of light, from the belt of Venus to different kinds of halos to crepuscular and anti solar rays. I remember that one time where anti-solar rays painted pole to pole "longitudes" on the hemispherical dome of the sky. It's too bad we don't have photographic memory, or at least I don't. It is such a…

I'm having trouble understanding the Belt of Venus one. Isn't purple expected to be there per ROYGBIV? Also the second image looks orange to me, not purple. > It is a pinkish glow that surrounds the observer This also makes no sense to me, or else maybe observer is jargon? But there's no hyperlink... The photographer certainly doesn't seem to be surrounded by a pinkish glow. Is it just a name for the purple part of t…

> Isn't purple expected to be there per ROYGBIV

I do not understand the Physics of the phenomenon very well, but I would expect the high frequency wavelengths (for example, purple) to be scattered away.

"Surround" does not describe the phenomenon of Belt of Venus adequately. Think of it like a horizontal band wrapped around the dome of the sky, slightly above the horizon, and prominent towards the West, fading towards the East.

Re: Ten Basic Clouds

#29
Sadly the website is offline, but if you like a hard copy cloud book I can heartily recommend the following. During my spell in Antarctica, I had to act as a meteorological observer (clouds are still manually encoded into METOBS that are entered in by WMO stations). This required learning the 10 types and being able to characterise the full picture of the sky.

It made me a total cloud addict, and spurred a far deeper interest in the role of the atmosphere in environmental science which has persisted ever since.

I heartily recommend looking up at the sky, dividing into oktas (eighths) and trying to classify how much of the low, medium and high clouds there are. If you do it regularly enough, the changes begin to astound. Getting your kids to do it too is also wonderful, because it's always there as an activity... :)

Really hoping this site comes online again soon!

https://www.worldofbooks.com/en-gb/products/met-office-cloud...

Re: Ten Basic Clouds

#30

Sadly the website is offline, but if you like a hard copy cloud book I can heartily recommend the following. During my spell in Antarctica, I had to act as a meteorological observer (clouds are still manually encoded into METOBS that are entered in by WMO stations). This required learning the 10 types and being able to characterise the full picture of the sky. It made me a total cloud addict, and spurred a far deeper…

It is amazing how much of 'it' is going on in the skies once you start noticing.

There was a thread this winter on solstices, with commenters expressing wonder at how could humans figure those out. If you notice sunrises/sunsets day after day over the years, it is inescapable. It's sad that we the modern humans spend so much time hunkered below opaque ceilings.

But I will say this, having interest in cloud-spotting and amateur astronomy is very very rewarding. Clouds stop being an impediment to you and grow into a phenomena worth appreciating on their own terms.

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