European Space Agency Sentinel Satellite Estimated Chlorophyll A
Sentinel 2
Two partial scenes from Sentinel 2 were usable for detection of HAB activity from January 9th, 2023, to January 15th, 2023. The following analysis focused on the scenes from January 10th and January 15th. There were several small patches of cloud cover over the IRL on both days, which likely resulted in small areas of ChlA overestimation.
These partial scenes did not have imagery from the Mosquito Lagoon or North IRL (NIRL).
The north section of the Banana River from State Road 528 to the NASA Parkway East causeway on January 10th had an estimated ChlA median of 33.06 µg/L, 3rd Quartile of 41.40 µg/L, and maximum of 173.99 µg/L. This was an increase from the previous estimated median of 27.65 µg/L on January 5th. On January 15th there was a median estimated ChlA of 40.63 µg/L, 3rd Quartile of 51.06 µg/L, and maximum of 189.22 µg/L.
The central section of the Banana River from Cocoa Beach to State Road 520 on January 10th had a median estimated ChlA of 37.87 µg/L, 3rd Quartile of 44.09 µg/L, and maximum of 121.62 µg/L. This was an increase from the estimated ChlA median of 27.37 µg/L observed on January 5th. By January 15th the estimated ChlA median increased to 42.73 µg/L, 3rd Quartile of 51.06 µg/L, and maximum of 152.83 µg/L.
On January 10th the southern section of the Banana River between Cocoa Beach and Patrick Space Force Base there was a median estimated ChlA of 18.52 µg/L, 3rd Quartile of 30.36 µg/L, and maximum of 113.35 µg/L. This was an increase from the estimated ChlA median 13.89 on January 5th. By January 15th the estimated ChlA median increased to 26.05 µg/L, 3rd Quartile of 31.28 µg/L, and maximum of 178.67 µg/L.
The minor bloom in the Banana River appears to have generally withstood last week’s cold snap, however all three sections experienced small increases in estimated ChlA. This contrasts with the reduction observed following the previous cold snap. The south section of the Banan River also continued to have the lowest estimated ChlA of the Banana River. Further investigation is needed to determine why this location is less supportive of the current HAB taxa.
On January 10th in the South NIRL from State Roads 528 to 404 there was an estimated ChlA median of 17.79 µg/L, 3rd Quartile of 36.29 µg/L, and maximum of 152.39 µg/L. This was a decrease from the estimated ChlA median of 21.45 µg/L on January 5th. By January 15th the estimated ChlA had a median of 20.72 µg/L, 3rd Quartile of 27.88 µg/L, and maximum of 169.83 µg/L.
On January 10th in the North Central IRL (CIRL) from State Road 404 to Turkey Creek there was an estimated ChlA median of 32.62 µg/L, 3rd Quartile of 43.93 µg/L, and maximum of 112.62 µg/L. This was an increase from the estimated ChlA median of 28.37 µg/L on January 5th. By January 15th the estimated ChlA had a median of 22.51 µg/L, 3rd Quartile of 28.11 µg/L, and maximum of 142.36 µg/L.
Sentinel 3
Five scenes from Sentinel 3 were usable for detection of HAB activity from January 9th, 2023, to January 15th, 2023. The following analysis focused on the scenes from January 11th and January 15th (Table 3, Table 4).
Of the 5 SJRWMD CM stations, the highest mean estimated ChlA concentrations on January 11th were observed at IRLB04 and IRLI21 with almost 30 µg/L. Then on January 15th IRLB04 had the highest estimated ChlA at 38.41 µg/L. Both IRLML02 and IRLTITUS experienced a 6 µg/L increase between January 11th and January 15th, from 10.66 µg/L to 16.03 µg/L and 12.81 µg/L to 18.75 respectively. IRLI13 remained steady between a mean estimated ChlA of 9.25 µg/L and 9.92 µg/L. IRLI21 was the only station to experience a decline in estimated ChlA with a mean of 17.96 on January 15th.
On January 9th the southern Mosquito Lagoon had an estimated ChlA median of 13.26 µg/L, 3rd Quartile of 22.11 µg/L, and maximum of 35.11 µg/L. This was an increase from the estimated ChlA median of 11.57 µg/L on January 7th. By January 15th the estimated ChlA median further increased to 21.08 µg/L, 3rd Quartile of 25.72 µg/L, and maximum of 33.08 µg/L.
On January 9th the North NIRL had an estimated ChlA median of 8.06 µg/L, 3rd Quartile of 11.78 µg/L, and maximum of 30.82 µg/L. This was like the estimated ChlA median of 8.46 µg/L on January 7th. By January 15th the estimated ChlA median increased to 17.42 µg/L, 3rd Quartile of 22.44 µg/L, and maximum of 26.64 µg/L.
There was an uptick in bloom activity in the Central NIRL, between Titusville and the State Road 528. On January 9th there was an estimated ChlA median of 13.28 µg/L, 3rd Quartile of 16.79 µg/L, and maximum of 28.06 µg/L. This was like the estimated ChlA median of 12.64 µg/L on January 7th. By January 15th the estimated ChlA median increased to 20.43 µg/L, 3rd Quartile of 27.93 µg/L, and maximum of 34.11 µg/L.
The northern section of the Banana River from State Road 528 to the NASA Parkway East causeway on January 9th had an estimated ChlA median of 27.61 µg/L, 3rd Quartile of 32.88 µg/L, and maximum of 59.19 µg/L. This was an increase in the median estimated ChlA of 18.42 µg/L on January 7th. By January 15th the estimated ChlA median was 34.05 µg/L, 3rd Quartile of 39.83 µg/L, and maximum of 46.05 µg/L.
The middle section of the Banana River from Cocoa Beach to the NASA Parkway East causeway on January 9th had an estimated ChlA median of 35.05 µg/L, 3rd Quartile of 45.92 µg/L, and maximum of 63.75 µg/L. This was an increase in the median estimated ChlA of 25.25 µg/L on January 7th. By January 15th the estimated ChlA median was 36.57 µg/L, 3rd Quartile of 57.03 µg/L, and maximum of 55.70 µg/L.
The southern section of Banana River from Cocoa Beach to Patrick Space Force Base on January 9th had a median of 15.01 µg/L, 3rd Quartile of 19.16 µg/L, and maximum of 65.63 µg/L. This was an increase in the median estimated ChlA of 10.44 µg/L on January 7th. By January 15th the estimated ChlA median was 20.14 µg/L, 3rd Quartile of 25.96 µg/L, and maximum of 57.71 µg/L.
This suggests that the minor bloom activity in the Banana River which has been ongoing for over a month may have stabilized after the decrease following last week’s cold snap. The central section however remains elevated in comparison to the north and south.
On January 9th in the South NIRL from State Roads 528 to 404 there was an estimated ChlA median of 9.78 µg/L, 3rd Quartile of 22.96 µg/L, and maximum of 58.03 µg/L. This was a decrease from the estimated ChlA median of 13.52 µg/L on January 5th. By January 15th the estimated ChlA had a median of 12.83 µg/L, 3rd Quartile of 24.24 µg/L, and maximum of 69.6 µg/L.
On January 9th in the North Central IRL (CIRL) from State Road 404 to Turkey Creek there was an estimated ChlA median of 20.99 µg/L, 3rd Quartile of 30.38 µg/L, and maximum of 52.04 µg/L. This was similar to the estimated ChlA median of 20.52 µg/L on January 7th. By January 15th the estimated ChlA had a median of 17.26 µg/L, 3rd Quartile of 22.37 µg/L, and maximum of 55.15 µg/L.
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