Tag Archives: codar

August 23

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Wind: W 2-19 knots
Sea State: calm in morning, rippled in afternoon
Visibility: 15 NM
Sky: clear, partly cloudy in evening
Temperature: 11-16 °C
Atmospheric CO2: 412.58 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

There were not a lot ecological happenings to note from today. The sea lions are continuing to grow in numbers in the main haul out spots on the southwest side of the main island, southeast side near the lighthouse, jetty area, and Middle Rock. Stay tuned for the weekly census tomorrow to get the official numbers to see how the population has grown since last week.

I have been keeping track of the two steller sea lions seen recently with flashers hooked to their mouths. I only saw one this morning near the jetty. I thought I saw one which was possibly the same one on Middle Rock, although I couldn’t get a good look at it because it was facing away.

I transferred diesel to the furnace tanks in each house, in the ongoing effort to get everything stocked up for the colder months.

There were a lot of eco tourism and pleasure boats in the area, taking advantage of the nice weather.

Here are two photos from today:

Varied Thrush and River Otter

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Wind: yesterday 2-27 knots from NE to W, today 2-27 knots from W to E
Sea State: yesterday rippled in am and calm in pm, today rippled then calm in evening
Visibility: yesterday 10-15 NM, today 5-15 NM
Sky: yesterday clear, today partly cloudy with sunny patches
Temperature: yesterday 4-8 °C, today 6-8 °C
Atmospheric CO2: 414.36 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

A varied thrush was seen on Race Rocks today. The bird that has similarities in size and colouring to an American Robin, hasn’t been seen this winter and possibly never before on Race Rocks. There is no mention of other sightings on this website. According to the Audubon field guide, varied thrushes like dense forests with lots of water. That’s about as different as you can get from Race Rocks, where there are no trees or fresh water. Perhaps this bird was flying over the Strait and stopped for a rest.

There were 20 pigeon guillemots near the jetty yesterday. They swam around, perched on rocks and the edges of the jetty. None were seen today.

The elusive river otter was seen today. It was sunning itself on a log on the rocks below camera 5. When it saw me taking photos from about 30 m away, it went around the corner and continued to soak up the sun.

Over the past few days, I have been trying to tidy up the human items left on the ground, before the grass and other plants grow up around them. There are many old hoses in various places that were at one time used for gardening and washing buildings. I have collected all the old hoses so they don’t interfere with the animals. Black plastic sheets that were used for landscaping at the base of the tower and around the main residence were becoming exposed. I removed all the pieces of plastic that have worked their way to the surface.

There were seven visitors to the island yesterday from Ocean Networks Canada. They spent several hours calibrating the CODAR equipment that measures near-surface ocean currents for the central portion of the Juan de Fuca Strait.

Yesterday, other than the Pearson College boat, Second Nature, there were two tour boats in the ecological reserve. Today, four tour boats, one sailboat and two pleasure boats were around Race Rocks.

Below are the results of the weekly census observed on Saturday, February 22. The numbers are substantially lower for almost every species regularly seen over the winter. Perhaps the relatively clear and calm conditions of this past week have encouraged the birds and marine mammals to venture further from their winter retreat on Race Rocks.
6 elephant seals (3 adult males, 2 female pups, 1 male pup)
8 steller sea lions
60 california sea lions
30 harbour seals
1 river otter
6 bald eagles (3 adults, 3 juveniles)
2 Canada geese
1 raven
20 brandt’s cormorants
10 double-crested cormorants
62 pelagic cormorants
101 gulls (mostly thayer’s gulls)
6 black oystercatchers
10 harlequin ducks
30 surfbirds
10 black turnstones
1 varied thrush
1 snow bunting
1 song sparrow
1 fox sparrow

UPDATED February 26: Photos have been uploaded now that the website is fixed.

Full Power Restored

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Wind: yesterday 0-34 knots from N to W, today 18-36 knots from W
Sea State: yesterday calm in morning changing up to 1m chop, today chop up to 1 m
Visibility: yesterday 5-10 NM, today 10-15NM
Sky: yesterday overcast and rain, today clear changing to rain in evening
Temperature: yesterday 5-8 °C, today 6-7 °C
Atmospheric CO2: 413.81 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

After twenty-five days with backup power, there is now full power on the island. The replacement part for the generator head was installed today. Thanks goes to the team who spent six hours on the island today, hauling the 450 lbs unit from the boat to the generator room, doing the installation and other needed upgrades. It was a busy day here for Greg, Alex, Lawrence, Stephane from Frontier Power, Ric and his apprentice Stephane. Lots of other staff at Pearson College made it possible for this fix and temporary power to be successful.

With full power restored, there is now enough power to more quickly top up the batteries and operate all the equipment on the island without draining the batteries too much. A few important pieces are now running again: the desalinator, Ocean Networks Canada’s CODAR, UVIC’s Davis weather station and both live cameras.

There are still four male elephant seals and three pups on the island. There was some fighting amongst the males last night, evident by the fresh cuts on the backs of three of the males and near the eye of the youngest female pup.

The number of sea lions on the rocks has decreased in the past two days. It could be related to the strong west winds that blow into some of their favourite haul out spots.

There was one tour boat seen in the ecological reserve today.

DND was conducting demolition training on nearby Bentinck Island today.

More Snow and Elephant Seals

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Wind: yesterday 10-29 knots N, today 16-63 knots N switching to E in the afternoon
Sea State: yesterday rippled, today up to 3 m waves from E
Visibility: yesterday and today 1-10 NM
Sky: both days fog, blowing snow, cloudy and patches of sun
Temperature: yesterday -1 to -4 °C, today -4 to 3 °C
Atmospheric CO2: 412.38 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

The snow has continued to fall, creating large snowdrifts against buildings, paths and rocks. I have enjoyed watching the elephant seals move through the snow and appear to play in it. The snowdrifts have changed my routes around the island, finding the path of least resistance that doesn’t disturb the ground or engulf me into a metre of snow or a hidden puddle. It’s not all fun and games here, there have also been some fights amongst the elephant seals. The beta males have been chasing each other around the island and sinking their teeth into each other. There are once again four adult males on the island. The alpha male continues to be with the pups and females. A new pregnant female elephant seal arrived yesterday morning as I was waiting for Greg to arrive in the boat with a food delivery. She made her way up the boat ramp to the centre of the island with the others. That brings the current elephant seal count to ten. Perhaps two more pups will arrive soon.

Since the snow and strong winds came, the sea lions are still mostly in the water, floating in large groups. Today, a few california sea lions huddled on the jetty. A smaller number of birds have been seen in the ecological reserve. Stay tuned for the post in two days with the results of the weekly census.

See the photos below for some recent snowy, windy and wavy views.

Video clips of a few elephant seals interacting with the snow:

CODAR installation for Race Rocks

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Juan de Fuca _CODAR_backgrounder

Today Guy drove me out to Race Rocks with Kevin Bartlett, Marine Equipment, Specialist with Ocean Networks Canada. They had installed equipment earlier in the year but had ro change the frequency of broadcasting before it is operational. Kevin was making repairs, one being fixing the conduit at the base of the tower which had been disturbed by sealions. When this equipment is fully operational it will give acurate current vectors for the eastern entrance of the Strait of Juan de Fuca.

 

 

Sample from a similar station now  in operation:

 see animation here

 

 

 

It was has been noticeable this year that instead of hauling out on the neighbouring islets of the Race Rocks Archipelago, the sealions are hauled out entirely on the main island of Great Race Rock. They have heavily impacted the vegetated areas .