osu2ChlaAnom
eng
UTF8
dataset
service
Roy Mendelssohn
NOAA NMFS SWFSC Environmental Research Division
+1 831-420-3666
110 McAllister Road
Santa Cruz
CA
95060
USA
erd.data@noaa.gov
pointOfContact
2024-03-25
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
4
column
2401
0.0125
row
2321
0.0125
vertical
1
temporal
231
2892897.3913043477
area
OSU Chlorophyll Anomaly V2, MODIS Aqua, West US, 2003-present
2024-03-25
creation
coastwatch.pfeg.noaa.gov
osu2ChlaAnom
Craig Risien
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
crisien@coas.oreognstate.edu
???
information
web browser
Background Information
Background information from the source
information
originator
U.S. West Coast Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua High Resolution Chlorophyll-a (CHLA) Anomaly Fields (July 2002 - March 2014). This suite of CHLA and Sea Surface Temperature (SST) climatology and anomaly data products are derived from daily, 0.0125 degree x 0.0125 degree, MODIS Aqua CHLA and SST fields that cover the California Current System (22N - 51N, 155W - 105W) for the 11-year period July 2002 through June 2013. These daily fields, obtained from the NOAA CoastWatch West Coast Regional Node website, were processed using a successive 3x3, 5x5 and 7x7 grid cell hybrid median filtering technique. This technique was found to effectively reduce noise in the daily fields while maintaining features and detail in important regions such as capes and headlands. The resulting median filtered daily fields were then linearly interpolated to a 0.025 x 0.025 degree grid and averaged to create 132 monthly mean fields. The seasonal cycles at each 0.025 degree x 0.025 degree grid cell were obtained by fitting each multiyear time series of monthly means to a nine-parameter regression model consisting of a constant plus four harmonics (frequencies of N/(1-year), N-1,4; Risien and Chelton 2008, Journal of Physical Oceanography (JPO)). Even with the median filtering and the temporal averaging of the daily fields, the highly inhomogeneous nature of the MODIS fields still resulted in regression coefficients that were excessively noisy. We therefore applied the same successive 3x3, 5x5 and 7x7 hybrid median filtering technique, described above, to the regression coefficients before finally spatially smoothing the coefficients using a loess smoother (Schlax et al. 2001, JTECH) with filter cutoff wavelengths of 0.25 degree latitude by 0.25 degree longitude. The seasonal cycles were then calculated from the filtered regression coefficients for each 0.025 degree x 0.025 degree grid cell using the mean and all four harmonics. It is important to note that THIS SUITE OF DATA PRODUCTS IS HIGHLY EXPERIMENTAL and is strictly intended for scientific evaluation by experienced marine scientists.
Craig Risien
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
crisien@coas.oreognstate.edu
???
information
web browser
Background Information
Background information from the source
information
pointOfContact
anomaly
aqua
atmospheric
chla
chlorophyll
chlorophyll-a
coast
coastwatch
college
color
data
earth
fields
high
imaging
journal
jpo
moderate
modis
noaa
node
ocean
ocean color
oceanography
oregon
physical
regional
resolution
sciences
sea
spectroradiometer
sst
state
surface
temperature
university
US
wcrn
west
west coast
theme
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
project
time
altitude
latitude
longitude
theme
CF Standard Name Table v70
The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
largerWorkCitation
project
Unidata Common Data Model
Grid
largerWorkCitation
project
eng
geoscientificInformation
1
-135.0
-105.0
22.0
51.0
seconds
2003-01-16T00:00:00Z
2024-02-16T00:00:00Z
0.0
0.0
OSU Chlorophyll Anomaly V2, MODIS Aqua, West US, 2003-present
2024-03-25
creation
Craig Risien
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
crisien@coas.oreognstate.edu
???
information
web browser
Background Information
Background information from the source
information
originator
U.S. West Coast Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua High Resolution Chlorophyll-a (CHLA) Anomaly Fields (July 2002 - March 2014). This suite of CHLA and Sea Surface Temperature (SST) climatology and anomaly data products are derived from daily, 0.0125 degree x 0.0125 degree, MODIS Aqua CHLA and SST fields that cover the California Current System (22N - 51N, 155W - 105W) for the 11-year period July 2002 through June 2013. These daily fields, obtained from the NOAA CoastWatch West Coast Regional Node website, were processed using a successive 3x3, 5x5 and 7x7 grid cell hybrid median filtering technique. This technique was found to effectively reduce noise in the daily fields while maintaining features and detail in important regions such as capes and headlands. The resulting median filtered daily fields were then linearly interpolated to a 0.025 x 0.025 degree grid and averaged to create 132 monthly mean fields. The seasonal cycles at each 0.025 degree x 0.025 degree grid cell were obtained by fitting each multiyear time series of monthly means to a nine-parameter regression model consisting of a constant plus four harmonics (frequencies of N/(1-year), N-1,4; Risien and Chelton 2008, Journal of Physical Oceanography (JPO)). Even with the median filtering and the temporal averaging of the daily fields, the highly inhomogeneous nature of the MODIS fields still resulted in regression coefficients that were excessively noisy. We therefore applied the same successive 3x3, 5x5 and 7x7 hybrid median filtering technique, described above, to the regression coefficients before finally spatially smoothing the coefficients using a loess smoother (Schlax et al. 2001, JTECH) with filter cutoff wavelengths of 0.25 degree latitude by 0.25 degree longitude. The seasonal cycles were then calculated from the filtered regression coefficients for each 0.025 degree x 0.025 degree grid cell using the mean and all four harmonics. It is important to note that THIS SUITE OF DATA PRODUCTS IS HIGHLY EXPERIMENTAL and is strictly intended for scientific evaluation by experienced marine scientists.
ERDDAP griddap
1
-135.0
-105.0
22.0
51.0
seconds
2003-01-16T00:00:00Z
2024-02-16T00:00:00Z
0.0
0.0
tight
ERDDAPgriddapDatasetQueryAndAccess
https://coastwatch.pfeg.noaa.gov/erddap/griddap/osu2ChlaAnom
ERDDAP:griddap
ERDDAP-griddap
ERDDAP's griddap service (a flavor of OPeNDAP) for gridded data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes.
download
OSU Chlorophyll Anomaly V2, MODIS Aqua, West US, 2003-present
2024-03-25
creation
Craig Risien
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
crisien@coas.oreognstate.edu
???
information
web browser
Background Information
Background information from the source
information
originator
U.S. West Coast Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua High Resolution Chlorophyll-a (CHLA) Anomaly Fields (July 2002 - March 2014). This suite of CHLA and Sea Surface Temperature (SST) climatology and anomaly data products are derived from daily, 0.0125 degree x 0.0125 degree, MODIS Aqua CHLA and SST fields that cover the California Current System (22N - 51N, 155W - 105W) for the 11-year period July 2002 through June 2013. These daily fields, obtained from the NOAA CoastWatch West Coast Regional Node website, were processed using a successive 3x3, 5x5 and 7x7 grid cell hybrid median filtering technique. This technique was found to effectively reduce noise in the daily fields while maintaining features and detail in important regions such as capes and headlands. The resulting median filtered daily fields were then linearly interpolated to a 0.025 x 0.025 degree grid and averaged to create 132 monthly mean fields. The seasonal cycles at each 0.025 degree x 0.025 degree grid cell were obtained by fitting each multiyear time series of monthly means to a nine-parameter regression model consisting of a constant plus four harmonics (frequencies of N/(1-year), N-1,4; Risien and Chelton 2008, Journal of Physical Oceanography (JPO)). Even with the median filtering and the temporal averaging of the daily fields, the highly inhomogeneous nature of the MODIS fields still resulted in regression coefficients that were excessively noisy. We therefore applied the same successive 3x3, 5x5 and 7x7 hybrid median filtering technique, described above, to the regression coefficients before finally spatially smoothing the coefficients using a loess smoother (Schlax et al. 2001, JTECH) with filter cutoff wavelengths of 0.25 degree latitude by 0.25 degree longitude. The seasonal cycles were then calculated from the filtered regression coefficients for each 0.025 degree x 0.025 degree grid cell using the mean and all four harmonics. It is important to note that THIS SUITE OF DATA PRODUCTS IS HIGHLY EXPERIMENTAL and is strictly intended for scientific evaluation by experienced marine scientists.
OPeNDAP
1
-135.0
-105.0
22.0
51.0
seconds
2003-01-16T00:00:00Z
2024-02-16T00:00:00Z
0.0
0.0
tight
OPeNDAPDatasetQueryAndAccess
https://coastwatch.pfeg.noaa.gov/erddap/griddap/osu2ChlaAnom
OPeNDAP:OPeNDAP
OPeNDAP
An OPeNDAP service for gridded data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes.
download
OSU Chlorophyll Anomaly V2, MODIS Aqua, West US, 2003-present
2024-03-25
creation
Craig Risien
Oregon State University - College of Earth, Ocean, and Atmospheric Sciences
crisien@coas.oreognstate.edu
???
information
web browser
Background Information
Background information from the source
information
originator
U.S. West Coast Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua High Resolution Chlorophyll-a (CHLA) Anomaly Fields (July 2002 - March 2014). This suite of CHLA and Sea Surface Temperature (SST) climatology and anomaly data products are derived from daily, 0.0125 degree x 0.0125 degree, MODIS Aqua CHLA and SST fields that cover the California Current System (22N - 51N, 155W - 105W) for the 11-year period July 2002 through June 2013. These daily fields, obtained from the NOAA CoastWatch West Coast Regional Node website, were processed using a successive 3x3, 5x5 and 7x7 grid cell hybrid median filtering technique. This technique was found to effectively reduce noise in the daily fields while maintaining features and detail in important regions such as capes and headlands. The resulting median filtered daily fields were then linearly interpolated to a 0.025 x 0.025 degree grid and averaged to create 132 monthly mean fields. The seasonal cycles at each 0.025 degree x 0.025 degree grid cell were obtained by fitting each multiyear time series of monthly means to a nine-parameter regression model consisting of a constant plus four harmonics (frequencies of N/(1-year), N-1,4; Risien and Chelton 2008, Journal of Physical Oceanography (JPO)). Even with the median filtering and the temporal averaging of the daily fields, the highly inhomogeneous nature of the MODIS fields still resulted in regression coefficients that were excessively noisy. We therefore applied the same successive 3x3, 5x5 and 7x7 hybrid median filtering technique, described above, to the regression coefficients before finally spatially smoothing the coefficients using a loess smoother (Schlax et al. 2001, JTECH) with filter cutoff wavelengths of 0.25 degree latitude by 0.25 degree longitude. The seasonal cycles were then calculated from the filtered regression coefficients for each 0.025 degree x 0.025 degree grid cell using the mean and all four harmonics. It is important to note that THIS SUITE OF DATA PRODUCTS IS HIGHLY EXPERIMENTAL and is strictly intended for scientific evaluation by experienced marine scientists.
Open Geospatial Consortium Web Map Service (WMS)
1
-135.0
-105.0
22.0
51.0
seconds
2003-01-16T00:00:00Z
2024-02-16T00:00:00Z
0.0
0.0
tight
GetCapabilities
https://coastwatch.pfeg.noaa.gov/erddap/wms/osu2ChlaAnom/request?service=WMS&version=1.3.0&request=GetCapabilities
OGC:WMS
OGC-WMS
Open Geospatial Consortium Web Map Service (WMS)
download
physicalMeasurement
chla_anomaly
float
Chla Anomaly
Roy Mendelssohn
NOAA NMFS SWFSC Environmental Research Division
+1 831-420-3666
110 McAllister Road
Santa Cruz
CA
95060
USA
erd.data@noaa.gov
distributor
OPeNDAP
DAP/2.0
https://coastwatch.pfeg.noaa.gov/erddap/griddap/osu2ChlaAnom.html
order
Data Subset Form
ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types.
download
https://coastwatch.pfeg.noaa.gov/erddap/griddap/osu2ChlaAnom.graph
order
Make-A-Graph Form
ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data.
mapDigital
This record was created from dataset metadata by ERDDAP Version 2.23