Monthly Satellite Chlorophyll-a Climatology of the Canadian Pacific Exclusive Economic Zone (2003-2020) - 1 km Resolution

MODIS-Aqua Chlorophyll-a (Chl-a) was acquired from the NASA Ocean Biology Processing Group at processing Level-2 (version 2018), 1-km resolution, where Chl-a concentration was calculated using the OC3/OCI method. The months of January and December were excluded from this dataset, as data in the winter months at higher latitudes are missing due to low sun angle preventing acquisition. The pixels were aligned on a regular grid using the SeaDAS program, after which the monthly geometric mean value at all pixels was calculated for individual years. Finally, the geometric mean and geometric standard deviation factor of chlorophyll-a were calculated by month from these images. These methods of calculating mean and standard deviation were used due to the log-normal distribution of chlorophyll-a. The geometric standard deviation is a unitless factor, where the lower bound is the ratio of the geometric mean and geometric standard deviation, and the upper bound is the multiplication of the two. In addition to these variables, the number of occurrences of valid data at each pixel over the period of observation were calculated. Pixels with fewer than two occurrences over the entire period of observation were removed from these maps, and set to a NaN value in the tif files. A few small gaps between pixels (near the edges of individual images) were filled using the median value of surrounding pixels, provided there were greater than 4 values. Finally, all rasters were cropped to the Canadian Exclusive Economic Zone and assigned to the NAD83 geographic coordinate reference system (EPSG:4269), and have a final pixel resolution of approximately 0.01 degrees. The monthly geometric mean, monthly geometric standard deviation factor, and number of occurrences for all pixels are provided.

Simple

Date ( RI_367 )
2021-04-28
Date ( RI_366 )
2021-04-06
Date ( RI_368 )
2022-02-14
Date ( RI_368 )
2023-07-01
RI_410
  Government of Canada;Fisheries and Oceans Canada;Science - Charles Hannah ( Research Scientist )
Institute of Ocean Sciences 9860 West Saanich Road P.O. Box 6000 , Sidney , British Columbia , V8L 4B2 , Canada
1 (250) 363-6369
RI_410
  Government of Canada;Fisheries and Oceans Canada;Science - Di Wan ( Data Products Manager )
Institute of Ocean Sciences 9860 West Saanich Road P.O. Box 6000 , Sidney , British Columbia , V8L 4B2 , Canada
RI_410
  Government of Canada;Fisheries and Oceans Canada;Science - Emmanuel Devred ( Research Scientist III )
Bedford Institute of Oceanography 1 Challenger Drive , Dartmouth , Nova Scotia , B2Y 4A2 , Canada
1 (902) 426-4681
Status
completed; complété RI_593
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_528 )
  • Climatology
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Climate
  • Oceans
Classification
unclassified; nonClassifié RI_484
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Spatial representation type
grid; grille RI_636
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Topic category
  • Climatology, meteorology, atmosphere
  • Environment
  • Oceans
Begin date
2003
End date
2020
N
S
E
W
thumbnail


Reference system identifier
http://www.epsg-registry.org / EPSG:4326 /
Distribution format
  • GeoTIF ( Unknown )

  • PNG ( Unknown )

RI_414
  Government of Canada;Fisheries and Oceans Canada;Science - Di Wan ( Data Products Manager )
Institute of Ocean Sciences 9860 West Saanich Road P.O. Box 6000 , Sidney , British Columbia , V8L 4B2 , Canada
OnLine resource
Data Dictionary ( HTTPS )

Supporting Document;HTML;eng,fra

OnLine resource
References ( HTTPS )

Supporting Document;HTML;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Mean 2003-2020 - 1km resolution - GeoTIF ( HTTPS )

Dataset;GeoTIF;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Standard Deviation 2003-2020 - 1km resolution - GeoTIF ( HTTPS )

Dataset;GeoTIF;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Mean 2003-2020 - 1km resolution - PNG ( HTTPS )

Supporting Document;PNG;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Standard Deviation 2003-2020 - 1km resolution - PNG ( HTTPS )

Supporting Document;PNG;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Number of Occurrences 2003-2020 - 1km resolution - GeoTIF ( HTTPS )

Dataset;GeoTIF;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Number of Occurrences 2003-2020 - 1km resolution - PNG ( HTTPS )

Supporting Document;PNG;eng,fra

OnLine resource
Satellite Chlorophyll-a Monthly Mean 2003-2020 - 1km resolution ( ESRI REST: Map Server )

Web Service;ESRI REST;eng

OnLine resource
Satellite Chlorophyll-a Monthly Mean 2003-2020 - 1km resolution ( ESRI REST: Map Server )

Web Service;ESRI REST;fra

File identifier
e16b99f1-cc7d-4f2b-8661-6a1706ee7386 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Parent identifier
Monthly Satellite Chlorophyll-a Climatology of the Canadian Pacific Exclusive Economic Zone (2003-2020) 5a7d1e1b-edeb-4a32-b17f-2ef053ca22d5
Hierarchy level
series; série RI_623
Date stamp
2023-07-01T12:15:16
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada;Fisheries and Oceans Canada;Science - Di Wan ( Data Products Manager )
Institute of Ocean Sciences 9860 West Saanich Road P.O. Box 6000 , Sidney , British Columbia , V8L 4B2 , Canada
 
 

Overviews

overview
SST_1km_2003-2020

Spatial extent

N
S
E
W
thumbnail


Keywords


Provided by

Associated resources

Not available