Larch

 

When I was a child, I was told of two kinds of trees: deciduous and conifer. This distinction seemed odd, for these are not matching classifications: deciduous refers to a seasonal shedding of leaves; conifer to a reproductive structure. Skepticism was appropriate: there are, in fact, broadleaf trees that are evergreen — the arbutus, and conifers that are deciduous — the larch.

Indeed, my favourite deciduous tree is the larch. Each fall, it decorates the mountainside when its needles turn golden before being shed.

The Western Larch flows down this distant mountainside like ringlets.

These backlit larch appear orangish.

And nearby in bright sunlight, the larch is golden.

Posted in scenes, weather | 2 Comments

Underwater spring

 

Video: It is rare that I think that a posting would have been improved by the inclusion of a video clip. I am usually more concerned with stopping motion than showing it. However today, a movie  clip would have helped the communication. Alas, I do not have one.

In mid-August, two springs appeared on the bed of Kokanee Creek (at ~400 metres from the mouth). They persisted until early September, when they disappeared. In mid-October, one spring reappeared. 

Visually, the springs were a churning mass of a lighter shade of sand upwelling from below which then spreading sideways.

On September 1st, Gary Munro waded out and took temperature measurements. Thrusting the thermometer deep into the upwelling fluid, he got a reading of 7 °C. At the time the water flowing in the creek was 11 °C.

This suggests that the source of the spring water was not elsewhere on the creek, but possibly ground water from off the mountainside. But, who knows?

One of the springs on the bed of Kokanee Creek in mid-August.

Churning sand rises from the bed of the creek in mid October. 

 

Posted in commentary, scenes, weather | 1 Comment

Western sky

 

The western sky is associated with sunsets — also grand haloes. 

This evening’s sky had a group of haloes. They were not the best I had seen, but they were eminently satisfactory. There was a modest 22° halo, an upper tangential arc, and (best of all) a grand circumzenithal arc.

The western sky before sunset shows haloes. The circumzenithal arc is near the centre top.

The circumzenithal arc varied in intensity and colour quality, but this is one of its better views.

 

Posted in weather | Comments Off on Western sky

Holes in a cloud

 

A week ago, I showed iridescence in a lenticular cloud (colours in a wave cloud). Here is another uncommon feature of such clouds: lacunosus, that is, the cloud is potmarked with holes. (Lacunosus is Latin for: full of lacunae, that is holes.)

The holes are caused by convective bubbles of warm air from the clear air below the cloud that then rise through it and punch holes in it. Normally this wouldn’t happen as the temperature of the clear air below the cloud is about the same as that in the cloud. However, the cloud sits at the crest of a wave in the atmosphere that resulted from the air flowing over a mountain, and sometimes the wave begins to collapse. This causes the cloud and surrounding air to descend. 

Now, an odd thing happens. As air descends, it is compressed by the higher pressure it encounters at a lower elevations. The air temperature rises as a result of this compression. Interestingly, the temperature rise in the clear air above and below the cloud is greater than that in the cloud, with the result that the warmer lower air rises in little bubbles and punches holes in the cloud.

A collapsing mountain wave produces lacunosus in the lenticular cloud.

 

Posted in weather | 3 Comments

Spoonbill Crow

 

Spoonbills are a genus of large wading birds with spoon-shaped bills. Alas, none of the species are found around the Lake. 

What we do have is a spoonbill in morphology, if not in name: the Northern Shoveler. 

Yet, I have just photographed another one: the exceedingly rare Spoonbill Crow.

A flock of Northern Shovelers display their spoon-shaped bills.

Today, the exceedingly rare Spoonbill Crow flew past me. (Sorry, I couldn’t help myself.)

 

Posted in birds | 2 Comments

Woodpecker’s home probe

 

For three days, a Pileated Woodpecker has been probing the outside of my house for comestibles. I don’t think that the bird discovers much, but it is welcome to anything it finds.

A female Pileated Woodpecker checks for bugs around the edges of a triangular window.

Not finding much around the window, it uses its tongue to probe a crack in the trim.

Posted in birds | 1 Comment

Merganser liftoff

 

What is the point of this morning’s picture? After all, a Common Merganser (this is a juvenile) lifts off from water a myriad times a day.

I just found the image pleasing.

 

Posted in birds | 8 Comments

Rusty Blackbird

 

The Rusty Blackbird is an infrequent visitor to the Lake. Indeed, most posted range maps suggest that it is not to be seen here at all. Yet, here it was on its fall migration foraging, apparently for arthropods, in ponds beside the Lake. (I would have missed the little flock had it not been for a chance encounter with Janice Arndt, who suggested what I could see if I were to head down a alternative path.) 

A few of the Rusty Blackbirds scouring the edge of a pond for delectables.

The birds would scour one small area and then fly to the next.

This is perhaps my favourite shot of the event. Two Rusty Blackbirds search the pond for arthropods, and one has been found. But, look at the autumnal colours reflected in the water.

This bird begins to pick up another arthropod that it had already turned over.

Posted in birds | 4 Comments

Cloud colours

 

The spectacular colours of fall are naturally associated with deciduous trees. Yet, these are not the only delightful variegation to be seen. Iridescent clouds are often visible in this season.

The colours in iridescent clouds arise from the interference experienced by light as it passes uniformly sized water drops, usually those found in lenticular clouds. The dominant cloud of summer, the cumulus, has a large diversity of droplet sizes with the result that iridescence is not seen. With the arrival of the colder months, the winds aloft strengthen and mountain waves form giving rise to frequent lenticular clouds. Of course, lenticular clouds are common in the winter also, but, for those of us beset with valley stratus, the view is blocked. So, for valley dwellers, the fall is a good time to see the brilliant colours of iridescent clouds.

Brilliant is the key word here. The colours form close to the sun where the light’s intensity is dazzling. Find a lenticular cloud adjacent to or covering the sun. Block out the sun and use sunglasses. (Stop your camera down by about three stops from the automatic reading.) The rewards are as grand as seeing a mountainside of larches. Below are two pictures taken yesterday.

 

Posted in weather | 7 Comments

Sniper

 

When spooked, a snipe bolts from its hiding place at a great speed and is gone. Consequently, shooting a flying snipe presents a considerable challenge. So much so, that those who became good at it were called snipers — a term that was adopted by the military for a marksman.

In late summer, I spooked a snipe, but it vanished in a blur before I could shoot its picture. Yesterday, a snipe erupted along my path; I shot it. I now qualify as a sniper.

A Wilson’s Snipe bolts.

 

Posted in birds | 4 Comments