Santa Cruz Wharf
Wednesday, February 19, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: None
– Dinophysis: None
– Margalefidinium: None
* Impressions *
After a fair amount of wind and rain at the end of last week, it was mostly sunny and cool at the wharf this morning. The net tow was mostly detritus/debris. Phytoplankton biomass decreased this week while diatom diversity increased. The phytoplankton assemblage shifted slightly and was co-dominated by Thalassiosira and Chaetoceros. A chain of seriata-size Pseudo-nitzschia was observed in the net tow, but none were detected in the probed counts.
Dinoflagellates:
R: Ceratium
R: Protoperidinium
R: Noctiluca
Diatoms:
C: Thalassiosira
C: Chaetoceros
P: Skeletonema
P: Paralia
R: Fragilariopsis
R: Pleurosigma
R: Asterionellopsis
R: Coscinodiscus\
R: Guinardia
R: Actinoptychus
R: Proboscia
R: Odontella
R: Pseudo-nitzschia
R: Thalassionema
Other:
R: Dictyocha
* Environmental Information *
Time: 7:45 am
Collector: A. Trapp
Water Conditions (SCW)
Water Temperature: 11.8 C
Water Conditions: Calm
Water Color/Code: Green, 5GY 5/6 (#27)
Water Visibility: 4 ft
Tide: Falling, Low – 9:51, 1.2 ft
Surf Report: WSW swell, 3-4
NDBC buoy 46236
– Significant wave height: 1.6 m
– Swell height/direction: 1.2 m, W
– Wind wave height/direction: 1.1 m, WNW
Weather Conditions (KudelaHawk)
Sky: Mostly sunny
Air Temperature: 48.7 F (9.3 C)
Wind: 3 mph, W
Solar radiation: 44 watts/m^2
Monterey Wharf II
Wednesday, February 19, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: None
– Dinophysis: None
– Margalefidinium: None
* Impressions *
The wharf this morning was partly cloudy. There was a slight breeze. No boats were docked nearby. The surface waters were calm. The water this week was greener than last week with a visibility of 4.5m. Chlorophyll visually increased from last week. Diatoms dominated the water column. Note: RAI this morning was quick due to the lithium battery fire at the power plant. Thalassiosira was abundant in the water. Detonula was common. The HAB species that were observed in the water this morning was Pseudo-nitzschia.
Diatoms:
R: Chaetoceros spp.
A: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
R: Pleurosigma spp.
R: Lauderia spp.
R: Navicula spp.
R: Asterionellopsis spp.
C: Detonula spp.
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 07:52 PT
COLLECTOR: Hannah McGrath
Water Temperature: 12.9°C
Water Conditions: calm
Water Color: 5GY 2/2
Visibility: 4.5 m
Tide: Falling, 0.49 m, low at 1002 h
Sky: partly cloudy, 60% cloud
Air Temperature: 10.0°C
Wind: offline, 0.89m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%