Just look up and you will see... many
common atmospheric-optical (and just plain "atmospheric") phenomena
that are often mistakenly thought
of as being rare.
Let me start by saying I saw my first sun dog back in 2005 which is when I first became interested in looking for and photographing halos, arcs, and
other weather related phenomena. Up until then I had not paid much attention to the daytime sky, although I had been interested in astronomy
(especially observing/photographing meteors) since 1998, as well as sunset photography and general nature photography.
It was a gradual process of becoming aware for me - learning when/where to look and understanding what conditions were favorable for observing
halos/arcs, but within a few months I was starting to see more halos, and I was surprised at just how common halos were. It was not uncommon for me to
see a few displays of halos/arcs per week if I had the time to look.
What I found was that the more time I spent looking, the more I saw, which is hardly surprising, but it definitely helped knowing how to look for
halos/arcs, and there is always an element of luck that plays a part.
Since then I've observed and photographed hundreds of halos/arcs, but we moved house last year so there has not been time up until recently to look
for them. In the last couple of months, now that the dust has started to settle I've tried to have my cameras ready whenever I've been out and about.
Here is a "diary" of what I've managed to photograph since the start of May this year:
060513 - I caught this upper
22° circular halo fragment:
Later on I caught a lower fragment:
070513 - A faint
22° circular halo:
100513 - We were in the middle of cooking dinner when my partner spotted these
mammatus clouds
and I had to scramble to get a shot before they disappeared:
16-170513 - There were a couple of bright
iridium satellite flares predicted on this night, so I set up a camera and waited. The
first was a bright -7.2 magnitude flare from Iridium 31:
The second was a super bright -8.2 magnitude flare from Iridium 34:
Note that each shot is a composite of a few short exposures, hence the gaps in the trail which are due to the camera being in between exposures.
Since I had a camera out I decided to leave it running and see if I caught any meteors - I did catch a small one, but as usual not the best that I
observed:
180513 -
22° circular halo:
190513 -
22° circular halo:
210513 - The day's display started off with a faint
22° circular halo:
After that a
sun dog appeared to the left of the Sun:
Sun dog to the right of the Sun a little later on after the above shot:
There was also a faint
circumzenithal arc visible:
Here is the same image with the saturation grossly increased to help bring out the circumzenithal arc:
230513 - Faint
22° circular halo:
290513 - Faint
22° circular halo:
020613 - A nice colourful
sun dog to the right of the Sun:
Then later to the left:
With fragments of halo just before the Sun disappeared behind the hill:
050613 - Caught a nice display of
altocumulus castelanus clouds AKA
"jellyfish clouds":
100613 - Just before dawn I noticed these
Noctilucent clouds:
Later on in the evening I caught this
22° circular halo fragment:
There was also a
circumzenithal arc:
110613 - Another faint
circumzenithal arc:
Here is the same image with the saturation grossly increased to help bring out the circumzenithal arc:
And later on that same day I also photographed this
iridescent cloud:
So you can see most of these phenomena are relatively common, especially sun dogs, 22° circular halos, and circumzenithal arcs. I also see iridescent
clouds all the time - perhaps on average every other day if I'm looking, although photographing a nice display can be tricky since they are constantly
changing/moving. I have literally hundreds of examples.
Mammatus, "jelly fish" clouds, and noctilucent clouds are not quite as common as the aforementioned phenomena, but if you keep looking at the right
times you'll eventually see them.
Meteors or even fireballs can be seen if you are patient too, and Iridium flares are very
predictable.
I don't live close to the Cascadian Subduction Zone or any other area prone to earthquakes, and as I mentioned I have been seeing these so called
"rare" phenomena for many years, so I very much doubt there is any connection there or to "methane in the atmosphere". It's well known that halos and
arcs are caused by sunlight shining through specifically shaped water ice crystals that make up high altitude (usually - although there are
exceptions) clouds. When the crystals are mostly orientated the same way the halos/arcs that are observed are much more visible and brightly coloured
than when the ice crystals are not well orientated, and uniformity of the shape of the crystals also plays a big role in this.
Under the right conditions halos/arcs can be very pronounced, and in actually rare cases complex displays can have much less common halos/arcs
contributing to the display than those I have mentioned here.
Examples of complex displays can be found
here,
here,
here,
and here. Particular
rare halos and arcs
can also appear on their own as well as being part of a rare display, so keep an eye out and a camera handy!
It's also
not true that ice halos/arcs are any more frequent now than they were in the past in my own experience, and there are records of
displays from many many years back:
The Dutch weather amateurs journal Onweders, Optische verschijnselen, that was published
between 1880-1961 contains plenty of observations of atmospheric optical phenomena.
[url=http://submoon.wordpress.com/category/uncategorized/page/2[/url]
(scroll down towards the bottom of the page)
edit on 14-6-2013 by FireballStorm because: (no reason given)
edit on 14-6-2013 by
FireballStorm because: typos/ommisions