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ASPERITAS, The CAS Cloud

ASPERITAS, The CAS Cloud

Forums The Cloud Forum ASPERITAS, The CAS Cloud

This topic contains 101 replies, has 5 voices, and was last updated by Shiprock45 Shiprock45 4 months, 1 week ago.

  • Author
    Posts
  • #286960
    Michael
    Michael
    Participant

    A separate thread on, for and about the CAS identified cloud now  officially known as ..Asperitas,,thanks to  our founder Gavin Pretor-Pinney,strikes me as worthy of a try. Photos would be my main contribution. I live in Phoenix Az, the Upper Sonoran Desert.We have around 275 days a year of ..blue sky. When we do have weather it tends to be quick in passing.At a very local place, my house,,a good rain is one that lasts half an hour. So the systems rush through with much hurly burly. That speed and energy tends to create Asperitas  somewhere in the Valley as a system passes through. I enjoy the challenge of spotting the phenomena.

    Asperitas at dawn

    jan2317b0410

    A  Close Up

    jan2317b0411

  • #287040
    Hans Stocker
    Hans Stocker
    Participant

    Thanks Michael, for the initiative to give asperitas its own topic on the forum in a great start. It is only one month and two weeks ago that Geoff LB reported that asperitas has become mainstream. That might be in the sense of common knowledge, but not in the sense of its appearance.

    I hope for a lot of different contributions and I hope you don’t want too limit it to only clear cases, Michael. There are also cases where one doubts whether it is asperitas or not. There are so many different kind of appearances that they are worth to discuss imho. For instance your recent ‘half half” on the  Colour Thread IV (which I think it is).

    What to think of this one. Is this asperitas giving the eye?

    2018-03-20 ev Wolken_0074 ac klein

    Any opinions?

  • #287135
    Michael
    Michael
    Participant

    So far Hans, I’ve seen Asperitas Undulatus, Laconusus, and Radius here,with undulatus the most common. In any case, there has to be enough to hang your hat on. Your shot offers Undulatus  yet Im not seeing Asperitas.  For Aperitas I think in terms of a field or large area where redundant waves of of agitation are seen. Looking at the clouds upside down for verifying ,,needs larger sampling to see the waves.

    Below is shot of what I call”Speckled Asperitas.” Light making it through the clouds to freckle their appearance adds  even more to these surreal clouds…imho.

    jan3116b2795

  • #287202
    Hans Stocker
    Hans Stocker
    Participant

    Michael, I agree your Speckled Asperitas is a beauty. I assume the layer of clouds is relatively thin?

    I agree also with the analysis of the asperitas giving the eye. This was more a cut-out with some interesting features (to me). Here is larger sampling that shows a lot of lenticulars but with irregular undulating in it. I am curious what your opinion is on a wider view.

    2018-03-20 ev Wolken_0076 ac klein

  • #287408
    Michael
    Michael
    Participant

    Looks like you even have Pileus or Velum going on there Hans. I’d say you captured some turbulent cloud there and the lenticular are coming apart from the turbulence. But again I need more to see in order to say Asperitas.

    Arizona Asperitas#104

    dec0517b8932

  • #287484
    Keelin
    Keelin
    Participant

    Thank you for launching this great topic, Michael! It’s off to a splendid start already and should draw many contributors who enjoy the rollercoaster rides of Asperitas. Wouldn’t be surprised if this calls for dramamine!

    And Hans, the images you’ve posted so far have much of the feeling I associate with Asperitas, so regardless of whether or not they meet classification parameters, they are exciting to see here.

    I haven’t see many instances of Asperitas locally, so hope a repost of one of my favorites is acceptable here. You and Hans might recognize a portion of it as The Mermaid’s Tresses from one of the B&W volumes.

    Asperitas & GGB_croppedAsperitas Over San Francisco Bay

  • #287557
    Hans Stocker
    Hans Stocker
    Participant

    Michael: unfortunately no wider view of my suspect. Indeed a lot lenticular. What makes it a bit asperitas-like for me are the irregular waves so typical for asperitas. I conclude: coincidence in a lenticular undulating scenery. It just lasted less than half an hour I remember.

    Keelin: that is a fantastic picture over Francisco Bay! The day it got published I complemented you with it on the gallery. I also saw your picture not so long ago in one of the Somewhat Occasional Newsletters from CAS. It is a surprise you took from this the mermaids tresses. Wonderful.

    Just today we had an asperitas event in the midst of some weather changes. No doubt about  this one imho. I have a series in which one can see loose patches of asperitas and also phases of dissipating.

    2018-07 Wolken_0318-2

  • #287558
    Hans Stocker
    Hans Stocker
    Participant

    Here a detail I like in a part of the sky where the asperitas was already more or less vanishing. Just some features of asperitas are left over.

    2018-07 Wolken_0288-2

  • #287561
    Hans Stocker
    Hans Stocker
    Participant

    And this strange cloud structure heralded the arrival of the asperitas. I like to share it for its strangeness. I also saw some suspect asperitas-features in this strange cloud. That might have been wishful thinking but what followed was asperitas indeed.

    2018-07 Wolken_0267-2

     

  • #287581
    Avatar
    hygge
    Participant

    Michael, Hygge is pleased with your initiating this thread, not least for the marketing of CAS. And I think you have asperitas to the T in your photos.

    Hygge has never observed asperitas, but I seem to remember one photo in nearby Dorset, UK, so no excuses.

  • #287608
    Michael
    Michael
    Participant

    Thanks hygge!, I hope you witness Asperitas soon. It seems to me, if there are two layers of cloud overhead that improves the chances of Asperitas. Of course one can’t see two layers if the lower one is not transparent enough. Big Sky  gives an advantage because if the upper layer ,say a alto stratus, is expansive enough the lower layer takes up only a portion of the sky in comparison , again making it easier to spot the phenomena. Its always easier to identify Asperitas from a distance than when its overhead. When its overhead its more difficult to identify the ” roll” of the waves, the peaks and valley of the wave action. At a distance just look at it upside down and you will know. I love the look on folks’ face when they do look at Asperitas upside down..” oh wow, now I see It!”

    Arizona Asperitas#105

    jan2017b0184

  • #287666
    Hans Stocker
    Hans Stocker
    Participant

    Nice knowing about the layers Michael. I checked my series of yesterday. Here is a overview of patches of asperitas on a lower layer and somewhat higher there seems to be a stratus layer.

    Oh and yes, I agree asperitas is better recognized looking form an angle than overhead. Overhead they don´t betray their forms so easy while looking at an angle the shapes and shadows give them their special appearance.

    2018-07 Wolken_0287-2

  • #287667
    Hans Stocker
    Hans Stocker
    Participant

    But I especially love the details…

    2018-07 Wolken_0298-2

  • #287762
    Michael
    Michael
    Participant

    Yes,Lighting is so critical to Asperitas. It helps to have some making it thru the clouds imho. I’ve learned to shoot Asperitas somewhat flat,,that is to say,,not with contrast dialed up. Details in the shadows get lost very easily with Asperitas. Dial down the contrast will get the details in the shadows and when I process the picture, I control how much contrast I bring back to the photo.

    Arizona Asperitas#106

    jan2017b0185

  • #287813
    Hans Stocker
    Hans Stocker
    Participant

    I agree Michael, too much contrast might spoil details. It is a matter of fine tuning.

    I am getting spoiled over here. After my former asperitas event even two times yesterday. Too much to share at once. The second appearance of asperias made me think of he rather lenticular situation I posted above. To test the statement by Michael about hardly recognizing asperitas overhead versus asperitas seen at a lower angle, I made these two shots (among others).

    2018-07 Wolken_0356-4

    Overhead

     

  • #287814
    Hans Stocker
    Hans Stocker
    Participant

    At the same time

    2018-07 Wolken_0357-2

    Somewhere else in the sky as seen at a lower angle

  • #287929
    Michael
    Michael
    Participant

    Heres a shot of Asperitas getting shredded by the winds.,,blown apart!

    Arizona Asperitas #107

    jan1317b9904

  • #287974
    Hans Stocker
    Hans Stocker
    Participant

    Yes very typical cambers Michael. Love them.

    Here is just a patch of asperitas in al ower layer of clouds and..

    2018-07 Wolken_0270-2

    And somewhat later already dissipating

    2018-07 Wolken_0273-2

  • #288126
    Michael
    Michael
    Participant

    Arizona Asperitas#108

    mar0616b3626

  • #288154
    Hans Stocker
    Hans Stocker
    Participant

    2018-07 Wolken_0342-3

    This was also part of Lenticularscape ( Cloudscapes Volume II).

  • #288325
    Michael
    Michael
    Participant

    Arizona Asperitas#109

    mar0616b3640

  • #288386
    Hans Stocker
    Hans Stocker
    Participant

    2018-07 Wolken_0361-2

    A different kind of appearance

  • #288486
    Michael
    Michael
    Participant

    Arizona Asperitas#110

    dec0517b8943

  • #288543
    Hans Stocker
    Hans Stocker
    Participant

    2018-07 Wolken_0349-2

    Asperitas on a lenticular day. Love these lines.

  • #288680
    Michael
    Michael
    Participant

    Arizona Asperitas#111

    jan2217b0335

  • #288718
    Hans Stocker
    Hans Stocker
    Participant

    From the archives. I remember to have posted some of the same series in the B&W threads.

    2017-07-19 Cum_0006 asr klein

    Any opinions on this one?

  • #288833
    Michael
    Michael
    Participant

    Hans,,Looks like the winds are shredding the clouds but, Asperitas? sure why not?

    Below is a dawn shot of Asperitas as it literally split in two!.Winds!

    Arizona Asperitas#112

    may0616b5139

  • #288838
    Keelin
    Keelin
    Participant

    Such beautifully dramatic shots, Michael and Hans! Especially welcome to see as skies have been fairly cloudless here these past few days.

  • #288906
    Hans Stocker
    Hans Stocker
    Participant

    Nice streets on #112 Michael. Too much boring blue skies over here too Keelin.

    Next one is one of my first encounters from the archives. It was a nice summer day with a lot of people going to the beach. At the moment I took this picture a lot were already gone or busy fleeing, while I was enjoying this dramatic sky with a hint of asperitas in it coming from the sea foreboding a change of weather.

    2015-07-05 Asperatus_0085 ns30-222 klein

  • #289207
    Hans Stocker
    Hans Stocker
    Participant

    2017-08-22 Parhelic_0053 B&W asr klein

    Vista

  • #289353
    Michael
    Michael
    Participant

    Arizona Asperitas#113

    jan3116a2784

  • #289567
    Michael
    Michael
    Participant

    Arizona Asperitas#114

    jan1917b0139

  • #290087
    Michael
    Michael
    Participant

    Arizona Asperitas#115

    aug2716b6781

  • #290536
    Michael
    Michael
    Participant

    Arizona Asperitas#116

    aug0715b8045

  • #291147
    Michael
    Michael
    Participant

    Arizona Asperitas#117

    nov1717b8517Asp

  • #291165
    Keelin
    Keelin
    Participant

    Thank you, Hans and Michael, for all the above. Such beautifully captured cloud formations, each one with its own personality, each one deserving applause. I’d like to be one of those birds on the wire!

  • #291456
    Michael
    Michael
    Participant

    Ha!, Keelin I don’t know which was more amazing , the cloud show  or that there were so many different types of birds watching it.

    Arizona Asperitas#118

    nov1717b8600Asp

     

  • #291699
    Hans Stocker
    Hans Stocker
    Participant

    Love the birds on the wire Michael. Great capture (and also others by the way).

    2018-03-03 Asperitas_0095-2

    Slightly Transparent

  • #291968
    Michael
    Michael
    Participant

    Arizona Asperitas#119

    mar0616b3715

  • #292026
    Hans Stocker
    Hans Stocker
    Participant

    Haarlem Asperitas

    2018-07 Wolken_0308-2

  • #292945
    Michael
    Michael
    Participant

    Arizona Asperitas#120

    dec0517b8924

  • #293013
    Hans Stocker
    Hans Stocker
    Participant

    2018-06 Wolken_0220-3

    This one was for free

  • #293577
    Michael
    Michael
    Participant

    Arizona Asperitas#121

    dec2215b1672Asp

  • #293668
    Hans Stocker
    Hans Stocker
    Participant

    I keep going back to the blues of #120 Michael. Very nice.

    2018-06 Wolken_0196-4

  • #294141
    Michael
    Michael
    Participant

    I like that shot Hans. Nice composition

    Arizona Asperitas#122

    jan0918a0243

  • #294248
    Hans Stocker
    Hans Stocker
    Participant

    Thanks Michael. Love the lightness in #122. Here is one that is the opposite.

    2018-03-03 Asperitas_0093 s1h55c23 c klein

    Beware…

  • #294874
    Michael
    Michael
    Participant

    Arizona Asperitas#123  an example of asperitas lacunosus

    july3018b4200

  • #295322
    Michael
    Michael
    Participant

    Arizona Asperitas#124

    Cumulus forming around Red Mountain is pulled up by the overhead passing of Asperitas.

    jan2017b0219

  • #296211
    Michael
    Michael
    Participant

    Arizona Asperitas# 125

    dec0517b9244

  • #296827
    Michael
    Michael
    Participant

    Arizona Asperitas#126

    dec3016b9576

  • #298540
    Hans Stocker
    Hans Stocker
    Participant

    Michael, your cumulus over Red Mountain is very peculiar. It really looks pulled up as you wrote.

    Here’s a very recent one in black and white.

    2018-09 Charigny_0171-2

  • #298760
    Hans Stocker
    Hans Stocker
    Participant

    And next a recent one in color. I must say I am rather fond of this one. Can’t wait to share it.

    2018-09 Charigny_0182-3

  • #298842
    Michael
    Michael
    Participant

    Arizona Asperitas #127

    april1016a4463

  • #299140
    Hans Stocker
    Hans Stocker
    Participant

    2018-09 Charigny_0181-2

    French Asperitas

  • #299462
    Hans Stocker
    Hans Stocker
    Participant

    2018-09 Charigny_0177-2

    French Again

  • #300343
    Hans Stocker
    Hans Stocker
    Participant

    Another French asperitas, showing undulatus between the larger asperitas waves. The appearence of these undulating smaller parts in between the larger lines struck me. Ever seen that way?

    2018-09 Charigny_0193-2

    Squared Undulatus

  • #301165
    Michael
    Michael
    Participant

    Looks like you had a great time in France, Hans. I think if you look closely you’ll  see undulations within undulations in a lot of Asperitas shots.

    Heres an easy going Asperitas shot.

    Arizona Asperitas# 128

    jan2217b0360

  • #301211
    Hans Stocker
    Hans Stocker
    Participant

    Yes I had Michael. Particularly the day that started with asperitas and gradually became lenticular with exploding Holmboe and all kinds of strange lenticular-like shapes like a Chicken Abductee or a Talking Sorting Hat. It took from 9:00 until 11:15.  On the gallery I posted two pics of the same scenery taken with an hour in between on which you can see the two different phases.

    2018-09 Charigny_0203-2

    Asperitas Phase

  • #302085
    Michael
    Michael
    Participant

    Fronts either coming in or  retreating sometimes provide for the multi-layers of wind not all going in the same direction..which produces great displays as the orientation of wind direction changes over the day. You captured a pretty neat day Hans!

    Another shot showing the physics  that produce Asperitas, existing over two sets of cloud.

    Arizona Asperitas #129

    mar1418a1662Asp

  • #302170
    Hans Stocker
    Hans Stocker
    Participant

    Yes, you are right Michael, it was a pretty neat day. The show lasted three or four hours. The asperitas was followed in that timeframe by lenticular formation with seemingly some asperitas characteristics leftover. I posted some of those in the Color Thread, for example my favorite ‘Cloudshow’, ‘Soft Clouds’ and the ones with Holmboe. Ever seen something like Cloudshow?

    Nice to see two sets of clouds with asperitas on your Arizona Asperitas #129.

    2018-09 Charigny_0158-2

    Asperitas Phase #2

     

  • #302217
    Keelin
    Keelin
    Participant

    Love the photos of Asperitas being collected here, Michael and Hans. Layered emotions, subtle mood shifts – poetry in motion! – all captured with keen eyes for composition. Kudos to you both! Send some of those wavy winds my way, if you can?

  • #302558
    Hans Stocker
    Hans Stocker
    Participant

    Thank you Keelin. I know for sure they will come your way too to audition for your camera. The wind already picked up your wish to spread it among the weather gods.

    2018-09 Charigny_0184-2

    What Will It Bring

     

  • #303127
    Michael
    Michael
    Participant

    Arizona Asperitas#130

    dec0517b9119asp

  • #303657
    Michael
    Michael
    Participant

    Arizona Asperitas#131

    april1016a4531

  • #304955
    Michael
    Michael
    Participant

    Arizona Asperitas#132

    april1016a4533

  • #305967
    Michael
    Michael
    Participant

    Arizona Asperitas #133

    april2817b2724

  • #306049
    Hans Stocker
    Hans Stocker
    Participant

    Love these wild waves on #133 that seem to got wrinkled a bit Michael.

    2018-09 Charigny_0167-2

    Thin Waves

  • #306227
    Hans Stocker
    Hans Stocker
    Participant

    2018-09 Charigny_0168-2

  • #306369
    Michael
    Michael
    Participant

    Arizona Asperitas #134

    dec0517b8927

  • #306467
    Hans Stocker
    Hans Stocker
    Participant

    Neat soft and smooth blues in #134 Michael.

    2018-07 Wolken_0361-2
    French Asperitas Unnumbered

  • #307041
    Michael
    Michael
    Participant

    Arizona Asperitas# 135

    april0916a4196

  • #307114
    Hans Stocker
    Hans Stocker
    Participant

    2018-06 Wolken_0071-2

    When People Don’t Look-up They Don’t Know What They Miss

  • #309198
    Michael
    Michael
    Participant

    Arizona Asperitas#136

    nov0417b7843b

  • #309330
    Hans Stocker
    Hans Stocker
    Participant

    Very smooth Michael.

    2018-06 Wolken_0072-3

    Is The Moustache Back En Vogue?

  • #309390
    Michael
    Michael
    Participant

    Arizona Asperitas#137

    nov0417b7859

  • #309786
    Michael
    Michael
    Participant

    Arizona Asperitas#138

    nov0417b7972

  • #310014
    Michael
    Michael
    Participant

    Arizona Asperitas#139

    nov0417b7833

  • #311120
    Michael
    Michael
    Participant

    Arizona Asperitas#140

    nov0417b7714

  • #311747
    Michael
    Michael
    Participant

    Arizona Asperitas #141

    nov0417b746

  • #313993
    Michael
    Michael
    Participant

    Arizona Asperitas#142

    nov0417a7795

  • #314140
    Hans Stocker
    Hans Stocker
    Participant

    2017-08-02 Aspritas_0050 B&W ac uitsnede klein

    Last Year August

  • #316369
    Michael
    Michael
    Participant

    Arizona Asperitas#143

    jan1317b9870Asp

  • #318203
    Michael
    Michael
    Participant

    Arizona Asperitas# 144

    jan1917b0171Asp

  • #318342
    Hans Stocker
    Hans Stocker
    Participant

    Great view on Asperitas #143 Michael. I noticed that this thread rapidly approaches a new volume (but not yet).

    Another B&W one from me spotted in July.

    2018-07 Wolken_0348-3

  • #320518
    Michael
    Michael
    Participant

    Arizona Asperitas #145

    jan2017b0177Asp

  • #320585
    Hans Stocker
    Hans Stocker
    Participant

    No troubles anymore with the login going wonkers Michael?

  • #320690
    Michael
    Michael
    Participant

    Hans..Problem went away for a few days but today its back to the ” refresh”  to stay logged in from screen to screen..

    Arizona Asperitas#146

    jan2217b0348Asp

  • #321197
    Hans Stocker
    Hans Stocker
    Participant

    It seems to be rather unpredictable Michael. Fortunately no problem to post replies so far.

    A nice play of light in this one.

    2018-04-01 Charigny_0149 s1ho klein

  • #322558
    Hans Stocker
    Hans Stocker
    Participant

    2018-06 Wolken_0200-2

    The Asperitas Vault

  • #323041
    Michael
    Michael
    Participant

    Nice Simplicity Hans!

    Arizona Aperitas#147

    nov0417b7726

     

  • #323602
    Hans Stocker
    Hans Stocker
    Participant

    Thanks Michael.

    By the way: I still have to refresh the page content regularly after seemingly getting logged out, but not always.

    2018-03-03 Asperitas_0043 asr klein

    Like A Cavity

  • #324837
    Michael
    Michael
    Participant

    Arizona Asperitas#148

    nov1717b8582

  • #325278
    Michael
    Michael
    Participant

    Arizona Asperitas#149

    jan1917b0174Asp

  • #325569
    Hans Stocker
    Hans Stocker
    Participant

    Iphone Hans 074 B&W uitsnede ns100-220

    Windmills Nowadays

  • #327066
    Michael
    Michael
    Participant

    Arizona Asperitas#150nov0417b7923

  • #327179
    Hans Stocker
    Hans Stocker
    Participant

    The same event as taken with Nowadays Windmills, but now with a windmill from old times.

    2015-08-16 Asperitas_0048 lucht ns klein

  • #327550
    Michael
    Michael
    Participant

    Arizona Asperitas#151

    nov0417b7847

  • #328175
    Michael
    Michael
    Participant

    Arizona Asperitas#152nov0417b7916b

  • #328322
    Hans Stocker
    Hans Stocker
    Participant

    Just a tip of the old-time Dutch windmill is visible.

    2018-06 Wolken_0220-3

  • #328341
    Keelin
    Keelin
    Participant

    Congratulations, Michael and Hans! Asperitas Volume I is a completely stunning collection. May the rock and roll ride continue. ~~~

    PS: Hans, might you have a spare windmill? I still yearn to see “the CAS Cloud” here in Napa, but so far, no go…

  • #329361
    Shiprock45
    Shiprock45
    Participant

    Great thread.

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