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June 12, 2014 @ 1730  Lake Winnipeg derived Chlorophyll-a (mg/m3) Dr. David Lobb demonstrating shale crumble July 22, 2014 @ 1820  Lake Winnipeg derived Chlorophyll-a (mg/m3) June 20, 2014 @ 1640  Lake Winnipeg derived Chlorophyll-a (mg/m3) May 28, 2014. True colour image Environment Canada Weir at Miami Station  Site 37W July 09, 2014 @ 1710  Lake Winnipeg derived Chlorophyll-a (mg/m3) July 03, 2014 @ 1750  Lake Winnipeg derived Chlorophyll-a (mg/m3) Chlorophyll-a legend (mg/m3) June 25, 2014 @ 1700  Lake Winnipeg derived Chlorophyll-a (mg/m3) July 08, 2014 @ 1805 Lake Winnipeg derived Chlorophyll-a (mg/m3)  July 15, 2014 @ 1635  Lake Winnipeg derived Chlorophyll-a (mg/m3) 
Home > Satellite images

C-core


chla_LWpg_2015_Aug_10_1820.jpg

Data for these images is collected from the Terra and Aqua satellite missions. Their goal is to collect information about the Earth's water cycle. In addition, variables such as vegetation cover on the land, phytoplankton and dissolved organic matter in the oceans is being measured. Images for Lake Manitoba and Lake of the Woods can be found HERE.

C-Core uses MODIS bands to generate True Colour and Chlorophyll-a derived products.

The Chlorophyll-a products are derived from MODIS imagery. Chlorophyll-a is calculated from the Fluorescence Line Height (FLH) using an algorithm developed by LWBIN Researcher Greg McCullough (CEOS,University of Manitoba). The FLH algorithm which estimate magnitude of chlorophyll fluorescence in reflectance spectra are based on the measurements of reflectance at three wavelengths in the fluorescence spectral zone. In the case of MODIS these three bands are 667, 678 and 748 nm respectively. FLH is calculated using the Surface Reflectance from these MODIS bands. The Surface Reflectance is derived by subtracting additive atmospheric components such as haze from the Top of Atmosphere Reflectance. The product is generated in 1 km pixel size in LCC projection and stored in a geotiff format.

The True colour products use MODIS Bands 1, 4, and 3, respectively corresponding to the red, green, and blue range of the light spectrum, are assigned to the red, green, and blue channels of a digital image. This band combination helps highlight the chlorophyll-a in the water. These images are called true-colour or natural color because this combination of wavelengths is similar to what the human eye would see. The images are provided in geotiff format. The MODIS color images provide a visual material for the upper waters, coastal zones, and land areas.

The C-Core website (http://173.195.60.31/WaterQuality) can be accessed by requesting a free username and password.

34 files, last one added on Aug 11, 2015
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Last additions - Satellite images
chla_LWpg_2015_Aug_10_1820.jpg
Lake Winnipeg, MODIS derived Chlorophyll-a concentration, 1km, August 10, 2015, 1820h18 viewsAug 11, 2015
TC_LWpg_2015_Aug_10_1820.jpg
Lake Winnipeg MODIS 500m, August 10, 2015, 182020 viewsTrue Colour Bands 1,4,3Aug 11, 2015
4_2014_07_22_1820_Winnipeg.jpg
July 22, 2014 @ 1820 Lake Winnipeg derived Chlorophyll-a (mg/m3)22 viewsJul 23, 2014
4_2014_07_21_1735_Winnipeg.jpg
July 21, 2014 @ 1735 Lake Winnipeg derived Chlorophyll-a (mg/m3)24 viewsJul 23, 2014
4_2014_07_20_1655_Winnipeg.jpg
July 20, 2014 @ 1655 Lake Winnipeg derived Chlorophyll-a (mg/m3)17 viewsJul 23, 2014
4_2014_07_19_1750_Winnipeg.jpg
July 19, 2014 @ 1750 Lake Winnipeg derived Chlorophyll-a (mg/m3)28 viewsJul 23, 2014
4_2014_07_17_1800_Winnipeg.jpg
July 17, 2014 @ 1800 Lake Winnipeg derived Chlorophyll-a (mg/m3)27 viewsJul 23, 2014
4_2014_07_15_1815_Winnipeg.jpg
July 15, 2014 @ 1815 Lake Winnipeg derived Chlorophyll-a (mg/m3)38 viewsJul 23, 2014

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