Santa Cruz Wharf
Wednesday, May 31, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None
* Impressions *
Another cool morning at the wharf. Net tow was mostly detritus/debris this week and the phytoplankton biomass decreased. The phytoplankton assemblage shifted back to mostly diatoms with Thalassiosira and Protoperidinium being the most abundant. There were a few chains of Pseudo-nitzschia in the net tow (all seriata-size), but none were seen in the probed counts. Alexandrium counts decreased an order of magnitude this week.
Dinoflagellates:
C: Protoperidinium
P: Dinophysis
P: LRB
R: Gymnodinium
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Noctiluca
Diatoms:
C: Thalassiosira
C: Chaetoceros
C: Guinardia
P: Skeletonema
P: Eucampia
P: Asteromphalus
R: Pseudo-nitzschia
R: Lauderia
R: Coscinodiscus
R: Ditylum
R: Pleurosigma
R: Paralia
R: Odontella
R: Fragilariopsis
R: Licmophora
* Environmental Information *
Time: 8:30 am
Collector: M. Conci
Water Conditions (SCW)
Water Temperature: 12.3 C
Water Conditions: Calm
Water Color/Code: Green, 5G 2/6 (#31)
Water Visibility: 2 ft
Tide: High – 8:53, 3.3 ft
Surf Report: NW swell, 3-4 ft
NDBC buoy 46042
– Significant wave height: 6.9 ft
– Swell height/direction: 6.2 ft, NW
– Wind wave height/direction: 3.0 ft, NW
Weather Conditions (KudelaHawk)
Sky: Foggy/marine layer
Air Temperature: 53.4 F (11.9 C)
Wind: 4.5 mph, SSW
Solar radiation: 96 watts/m^2
Monterey Wharf II
Wednesday, May 31, 2023
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None
* Impressions *
This morning the sky was filled with clouds. The mountains in the horizon were slightly visible. There was a slight breeze but the surface water was relatively calm. There were many seabirds flying on the surface of the water. The water this week was greener than last week with a visibility of 5.5m. Chlorophyll slightly decreased from last week. Both Chaetoceros and Pseudo-nitzschia were common in the water. Meanwhile, Guinardia was present. The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis, and Akashiwo sanguinea.
Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Noctiluca spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Amylax
Diatoms:
C: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Asteromphalus spp.
R: Eucampia
Others:
R: Dictyocha spp.
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0750 PT
COLLECTOR: Hannah McGrath
Water Temperature: 13.56°C
Water Conditions: relatively calm
Water Color: 5G 2/2
Visibility: 5.5m
Tide: Rising, 1.01 m, high at 0858 h
Chlorophyll: 7.101mg/m^3 by in vivo RFU
Sky: cloudy, 100% cloud
Air Temperature: 12.22°C
Wind: NA, 3.58 m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%