Seawater Data February, 2021

Daily Sea Surface Temperature and Salinity Observations
Station: Race Rocks
Observer: Rod King
Month: Feb-21
Day Time Temp °C Sal ppt
1 16:00 8.1 31.3
2 8:30 7.9 31.7
3 16:30 8.1 31.3
4 8:30 7.9 31.5
5 16:00 8.9 31.3
6 9:00 8.1 31.3
7 11:30 8 31.4
8 9:00 7.8 31.4
9 8:30 7.6 31.5
10 8:30 7.9 30.4
11 11:30 7.5 31.3
12 13:00 7.7 31.3
13 11:00 7.2 31.2
14 15:30 7.2 31.6
15 15:30 7.4 31.6
16 9:00 7.5 31.3
17 8:40 7.5 31.3
18 8:40 7.5 31.2
19 8:20 7.5 31.2
20 10:02 7.5 31.2
21 8:15 7.5 31.5
22 9:00 7.7 31.5
23 10:55 7.5 31.4
24 10:21 7.4 31.4
25 18:00 7.7 31.5
26 13:52 7.9 31.9
27 9:00 7.6 31.6
28 13:30 7.8 31.6
29
30
31

Census February 28, 2021

The island is busy with activity.  Spring is seeing a rise in the bird population. California sea lions are back after the snow has melted. Here is the census:

Mammals

  • Steller sea lion 79
  • Harbour seal 75
  • California 62
  • Elephant seal male 2
  • Elephant seal female 1
  • Elephant seal pup 4
  • Sea otter 1

Birds

  • Bald eagle adult 2
  • Bald eagle juvenile 6
  • Turnstones 18
  • Killdeer 0
  • Gulls 84
  • Cormorants 665
  • Pigeon guillemots 54
  • Oyster catcher 6
  • Canadian geese 6
  • Harlequin 9

Halibut fishing on again

The wind has stopped for a day.Wind NE .50 calm seas ski clear visibility 15nm

small boats fishing Pedder bay Beachy Head and halibut spots.

The island is full of life today. Elephant seals have been busy moving all over the island. Birds are very active today. Gaggles of Canadian geese are arriving to the island. Pigeon Guillemots are looking to nest , lots of eagles today. Spring is in the air at Race Rocks.

Census and Orcas.

Animal Census: Feb 17 2021
Gulls 68
Cormorants 738
Pigeon Guillemots 54
Eagles 12
Black Turnstones 28
Harlequin ducks 7
Steller sea lions 77
California sea lions 39
Pacific Harbour seal 62
elephant seal male 2
elephant seal female 2 pups
orca 4
Biggs orcas 7 East bound Southern Resident Lpod J, k pod west bound.

wind west 20 knots sky over cast and rain visibility 10 nm sea state 3 foot chop. 

Why are the Waters around Race Rocks so Nutrient Rich?

The productivity of the waters passing by Race Rocks contributes to the high biodiversity and abundance of organisms in the area.  Part 5 of the following journal article provides a clue for the incidence of high Nitrogen level throughout the Strait of Juan de Fuca.

Free Access

Influences of the Juan de Fuca Eddy on circulation, nutrients, and phytoplankton production in the northern California Current System

First published: 06 August 2008

https://doi.org/10.1029/2007JC004412

Citations: 37

5. Regional Effects of the Juan de Fuca Eddy

5.1. Nutrient Enrichment of the Northern CCS

[44] The Juan de Fuca Eddy has been described as an “upwelling center”, allowing water to be raised from deeper depths than in classical wind‐driven upwelling [Freeland and Denman, 1982]. Upwelling in the eddy enriches the deep waters that flow into Juan de Fuca Strait as part of the estuarine circulation return flow. The penetration into the strait of this nutrient‐rich water mass is evident in a vertical section of ambient nitrate concentration measured in September 2003 (Figure 13). At the mouth of the strait, nitrate concentrations below 100 m (the approximate depth of the division between inflow and outflow) are >34 μM. Similar concentrations are present in bottom water along the strait axis, reaching ∼150 km east of the Strait entrance where strong mixing in shallow regions of high tidal currents mixes them upwards.

image

Vertical section of nitrate concentration measured in an along‐axis Juan de Fuca Strait transect (18 September 2003). Station names are across the top of the section and geographically in the insert figure. Continue reading →