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Harmful Algal Bloom Data History

Map View About HAB News What Are HABs? HAB Species

Santa Cruz Wharf
Location: 36° 57.48’ N,122° 1.02’ W
Provider / PI: UCSC/CeNCOOS / Raphael Kudela

Dramatic increase in phytoplankton biomass, mostly diatoms (welcome back spring?).  Assemblage dominated by Skeletonema (long chains).
Click here to download complete data history
note: cell counts, chlorophyll, and nutrient concentrations are plotted on a logarithmic scale.
PDT - Pacific Daylight Time (UTC-7) Summer (Apr-Oct)
PST - Pacific Standard Time (UTC-8) Winter (Nov-Mar)
more information
Data Legend
NaN: not analyzed
nd/bd: below detection limit
Date Alexandrium spp. (cells/L) Chloro (mg/m3) Domoic Acid (ng/mL) NO3- (uM) P (uM) Pseudo-nitzschia seriata group (cells/L) Si (uM) Water Temp (°C)
2013-04-17 NaN U9 NaN NaN NaN NaN NaN 9.9
2013-04-10 NaN 2.98 NaN NaN NaN NaN NaN 11.3
2013-04-03 NaN 5.80 NaN NaN NaN NaN NaN 12.7
2013-03-27 70 7.14 NaN NaN NaN 0 NaN 11.8
2013-03-20 270 6.27 NaN NaN NaN 200 NaN 11.8
2013-03-13 0 2.82 NaN NaN NaN 400 NaN 11.9
2013-03-06 0 14.00 NaN NaN NaN 1,000 NaN 11.0
2013-02-27 240 9.55 NaN NaN NaN 200 NaN 10.9
2013-02-20 0 6.85 0.00 NaN NaN 750 NaN 10.7
2013-02-13 0 6.26 0.00 NaN NaN 0 NaN 10.7
2013-02-06 480 3.47 0.00 NaN NaN 0 NaN 10.7
2013-01-30 120 1.20 0.00 NaN NaN 0 NaN 10.5
2013-01-23 150 3.26 0.00 NaN NaN 0 NaN 10.5
2013-01-16 0 12.43 0.00 NaN NaN 0 NaN 9.2
2013-01-09 0 2.56 0.00 NaN NaN 0 NaN 11.1
2012-12-19 0 2.42 0.00 NaN NaN 0 NaN 11.2
2012-12-12 0 2.21 0.00 3.59 1.79 0 12.08 13.4
2012-12-05 0 5.66 0.00 6.41 1.59 0 30.05 14.3
2012-11-28 0 16.73 0.00 0.21 1.39 0 12.40 13.7
2012-11-21 0 6.57 0.06 0.78 1.22 3,850 10.44 14.1
2012-11-14 0 30.34 0.02 0.00 0.82 1,350 17.68 12.6
2012-11-07 0 3.84 0.02 2.25 1.40 0 14.70 14.5
2012-10-31 0 3.39 0.11 0.47 1.20 14,950 22.96 14.5
2012-10-24 0 3.12 0.03 0.25 1.31 0 19.38 14.2
2012-10-17 0 2.57 0.00 0.82 1.19 0 13.78 15.6
2012-10-10 0 11.65 0.06 0.00 0.73 0 15.01 15.0
2012-10-03 40 6.42 0.00 0.24 0.92 0 13.66 15.7
2012-09-26 0 7.38 0.01 0.48 1.00 0 13.10 14.7
2012-09-19 0 8.75 0.06 0.15 0.69 31,250 6.58 14.4
2012-09-12 0 9.67 0.00 0.70 0.65 0 6.03 14.9
2012-09-05 0 3.88 0.00 0.79 0.54 0 4.13 14.5
2012-08-29 0 4.62 0.01 1.20 0.43 750 3.31 14.9
2012-08-22 0 2.60 2.77 0.19 0.53 127,500 3.03 15.5
2012-08-15 0 8.44 9.36 0.70 0.55 275,300 8.29 14.2
2012-08-08 0 2.48 1.69 1.13 1.17 36,450 8.41 15.7
2012-08-01 0 4.65 0.51 0.62 0.47 206,700 4.60 15.4
2012-07-26 0 6.32 0.01 2.60 1.09 0 9.91 13.8
2012-07-18 0 4.20 0.00 0.38 0.51 0 9.19 14.2
2012-07-11 0 5.13 0.04 0.45 0.44 350 6.17 14.8
2012-07-03 0 12.38 0.02 1.18 0.51 800 4.57 15.8
2012-06-27 0 3.28 0.02 1.59 0.56 0 4.21 14.7
2012-06-20 0 3.24 0.00 0.96 0.50 0 10.10 12.9
2012-06-13 0 7.21 0.06 0.00 0.13 2,000 2.70 14.1
2012-06-06 0 6.78 0.16 3.36 1.10 27,800 9.78 9.4
2012-05-30 0 4.62 0.36 22.86 3.21 52,800 34.67 11.9
2012-05-23 0 15.29 0.17 0.84 0.69 124,450 0.97 13.1
2012-05-16 0 2.67 0.23 0.26 0.46 13,500 9.47 12.9
2012-05-09 0 6.00 0.02 0.00 0.23 24,200 0.48 12.6
2012-05-02 0 13.75 0.48 0.58 0.82 59,350 13.57 11.5
2012-04-25 0 6.21 0.08 2.34 0.89 10,850 17.17 12.7
2012-04-18 0 10.29 0.01 0.76 0.82 1,450 2.96 11.2
2012-04-11 0 6.08 0.00 8.63 1.26 0 21.00 11.2
2012-04-04 0 6.79 0.00 12.15 1.52 0 22.72 10.5
2012-03-28 0 4.99 0.00 10.36 1.62 0 29.12 11.2
2012-03-21 0 2.86 0.00 9.42 1.55 0 23.84 11.1
2012-03-14 0 8.01 0.00 4.37 1.43 0 38.52 10.7
2012-03-07 0 3.36 0.00 18.93 2.15 0 31.42 8.8
2012-02-29 0 4.36 0.00 14.32 1.62 0 24.44 10.2
2012-02-22 0 2.94 0.00 10.00 1.49 0 19.37 10.7
2012-02-15 0 1.70 0.00 9.51 1.41 0 16.58 10.1
2012-02-08 0 3.66 0.00 5.70 1.16 0 12.55 11.1
2012-02-01 0 2.83 0.00 7.81 1.34 0 18.39 11.4
2012-01-25 0 1.50 0.00 7.84 1.18 0 18.20 10.9
2012-01-18 0 1.47 0.00 9.48 1.29 0 20.91 9.7
2012-01-11 10 2.85 0.00 10.04 1.25 0 17.93 10.4
2012-01-04 0 1.60 0.00 10.14 1.27 0 16.09 11.2
2011-12-21 270 1.57 0.00 5.38 0.86 0 9.87 11.1
2011-12-14 80 2.10 0.54 2.35 1.13 27,200 16.36 10.7
2011-12-07 1,720 42.45 0.09 0.94 0.76 5,050 18.80 10.2
2011-11-30 820 53.27 0.80 0.21 0.65 25,350 18.22 11.5
2011-11-23 2,360 52.85 3.81 0.07 0.75 81,200 15.61 11.3
2011-11-16 7,067 48.55 3.13 0.49 1.45 250 19.45 11.3
2011-11-09 1,490 13.93 0.00 6.13 1.11 153,850 19.68 12.1
2011-11-02 50 4.43 0.05 5.42 1.49 2,600 21.63 12.3
2011-10-26 760 5.90 0.05 5.86 1.37 900 17.21 13.5
2011-10-19 20 13.05 0.26 5.81 0.85 13,450 16.35 17.2
2011-10-12 0 3.45 0.06 2.51 1.07 0 18.54 15.4
2011-10-05 880 5.21 0.92 2.00 0.70 47,200 9.80 15.1
SoCal Map