Satellite Images

November 4-9, 2015

Aqua-MODIS Chlorophyll-a (chl-a), and remote sensing reflectance at 555 nm (Rrs) from Nov. 4 Nov. 9, 2014, post-diversion. Images show evolution and die down of chl-a levels in Santa Monica Bay after the diversion ended and the effluent has been redirected back to the deeper 5-mile outfall pipe.

Aqua-MODIS Chla

Aqua-MODIS Rrs

November 3, 2015

Terra-ASTER sea surface temperature (SST) image from Nov. 3, 2015 at 11:46:31 PST post-diversion. The distinct low temperature signature that has been detected above the 1-mile outfall pipe during the effluent diversion can no longer be detected. The effluent has be redirected to the deeper 5-mile outfall pipe at the time of this image acquisition.

 

November 2, 2015

Aqua-MODIS Chlorophyll-a (chl-a), and remote sensing reflectance at 555 nm (Rrs) from Nov. 2, 2015 at 13:17:21 PST, post-diversion. An area of high chl-a is seen north of the outfall pipes, along the coast and swirling in an eddy. This high signature is also seen in the Rrs image at the 555 nm wavelength.

 

November 1, 2015

Aqua-MODIS Chlorophyll-a (chl-a), and remote sensing reflectance at 555 nm (Rrs) from Nov. 1, 2015 at 12:35:10 PST, during the diversion. Areas of high chl-a are seen at the 1-mile outfall pipe, along the coast to the north. These levels are considerably less than the proceeding days. There is high Rrs signature is also seen at the 555 nm wavelength above the 1-mile outfall pipe.

 

October 31, 2015

Aqua-MODIS Chlorophyll-a (chl-a), and remote sensing reflectance at 555 nm (Rrs) from Oct. 31, 2015 at 14:30:10 PDT, during the diversion. There has been a decrease in chl-a levels from the previous two days. An area of high chl-a is seen north of the outfall pipes and along the coast of Santa Monica Bay. This high signatures are also seen in the Rrs image at the 555 nm wavelength.

 

October 30, 2015

Aqua-MODIS Chlorophyll-a (chl-a), remote sensing reflectance at 555 nm (Rrs) and sea surface temperature (SST) from Oct. 30, 2015 at 13:46:44 PDT, during the diversion. There has been a slight change from the previous day. An area of high chl-a is seen north of the outfall pipes and along the coast of Santa Monica Bay. There is also a smaller bloom circulating off the tip of San Pedro. These high signatures are also seen in the Rrs image at the 555 nm wavelength. These areas are also correlated with regions of cooler SST.

October 29, 2015

Aqua-MODIS Chlorophyll-a (chl-a), remote sensing reflectance at 555 nm (Rrs) and sea surf ace temperature (SST) from Oct. 29, 2015 at 14:41:55 PDT, during the diversion. An area of high chl-a is seen north of the outfall pipes and along the coast of Santa Monica Bay. There is also a smaller bloom circulating off the tip of San Pedro. These high signatu res are also seen in the Rrs image at the 555 nm wavelength. These areas are also correl ated with regions of cooler SST.

October 26, 2015

Aqua-MODIS ocean color data from Oct. 26, 2015 at 14:11:12 PDT. Data from the chl-a bands show very high levels along t he coast that may be due in part to the diversion. The high signature is seen to the north of the outfall, with the maj ority to the south of the 1-mile outfall pipe, wrapping around Palos Verdes, also seen in Landsat-8 images of the same d ay. The Rrs-555 nm band shows a distinct signature of high particulates and turbulence levels at the 1-mile outfall pip e. The inset image shows high levels of particulates wrapping around Palos Verdes as well.

Aqua-MODIS Chla

Aqua-MODIS Rrs

Landsat-8 ocean color from Oct. 26, 2015 at 11:28:33 PDT, during the diversion. Chloroph yll-a (chl-a), suspended particulate matter (SPM), and turbidity, are all derived from the same data frame. A) Zoomed in image showing a high signature associated with surfacing effluent just above the 1-mile outfall pipe. B) A zoomed out image showing both the 5-mile outfall and the 1-mile outfall pipes. C) This high signature can also be seen moving south and off shore, wrapping around Palos Verdes. Data is missing offshore due to cloud cover. The encircled pixel in the Chl-a image is the Marine Surveyor sampling on station D9W as the satellite passed overhead.

Landsat Chla

Landsat-8 sea surface temperature (SST) data from Oct. 26, 2015 at 11:28:33 PDT, during the diversion. A region of slightly cooler waters, associated with the effluent being discharged from the 1-mile outfall pipe, can be seen just south of the terminus of the 1-mile pipe. Two warm signatures from the large ships south of the 1-mile outfall pipe can also be seen.

Landsat SST

Landsat SPM

Landsat Turbidity

October 10, 2015

Landsat-8 sea surface temperature (SST) data from Oct. 10, 2015 at 11:28:05 PDT, during the diversion. A cooler temperature signal can be seen at the terminus of the 1-mile outfall pipe, spreading to the south. Two warm signatures from the large ships south of the 1-mile outfall pipe can also be seen.

Landsat SST

 

Landsat-8 ocean color from Oct. 10, 2015 at 11:28:05 PDT, during the diversion. Chlorophyl-a (chl-a), Rayleigh-corrected reflectance at 655 nm (Rrc), suspended particulate matter (SPM), and turbidity, are all derived from the same data frame and show a uniquely high signature associated with surfacing effluent above the 1-mile outfall pipe. This high signature can also be seen moving south and off shore from the terminus of the 1-mile pipe. High levels are also seen north of the pipes at the opening of Marina Del Rey.

Landsat Chla

Landsat Rrc

Landsat SPM

Landsat Turbidity

October 2, 2015

Terra-ASTER sea surface temperature (SST) image from Oct. 2, 2015 at 11:46:07 PDT. A distinct low temperature signature can be seen above the 1-mile outfall pipe. This signature diffuses and mixes with the surrounding warmer waters as it moves towards the north. A high temperature signal can also be seen from the large ships south of the 1-mile outfall pipe.

Aster SST

 

September 24, 2015

Landsat-8 ocean color data from Sep. 24, 2015 at 11:28:18 PDT. Chlorophyl-a (Chl-a), suspended particulate matter (SPM), and turbidity, are all derived from the same data frame and show a uniquely high signature associated with surfacing effluent above the 1-mile outfall pipe. A high signature can also be seen moving off shore, which may also be related to the surfacing of the effluent.

Turbidity red

SPM

Chla

TC

Landsat-8 True Color scene from September 24, 2015 at 11:28:27 PDT. Note the murky water at the end of the shorter one mile pipe caused by the surfacing of the high sediment load within the treated effluent. Similar land based sediment loads can be seen along the turbulent coast and expelling from the Ballona Creek area. In the captured image the effluent plume is clearly seen as a separate mass moving in a primarily offshore direction. Landsat8_20150924.jpg: Landsat-8 satellite image of sea surface temperature on September 24, 2015. A relatively colder temperature signature is seen above the 1-mile outfall pipe that is associated with the surfacing of effluent in the area. The cold temperature effluent-indicator gradually mixes with the surrounding ocean as it spreads away from the 1-mile pipe. Continued examination of sea surface temperature will indicate the dominant spreading direction of the plume. Also visible is the high temperature signature of the large oil tanker to the south of the Hyperion outfall pipes.

Rrs

SST

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