Chlorophyll data

Description

Data relating to the callibration of remote sensed satellite data. The SeaWifs satellite provides estimates of chlorophyll concentration at the ocean surface from measurements of ocean surface colour. It is of interest to attempt to use these data to predict direct bottle measurements of chl. conc.

Usage

data(chl)

Format

A data frame with 6 columns and 13840 rows. The columns are:

• lonlongitude

• latlatitude

• jul.dayJulian day (i.e. day of year starting at Jan 1st.)

• bathOcean depth in metres.

• chldirect chlorophyll concentration measured at given location from a bottle sample.

• chl.swchl. conc. as measured by Seawifs Satellite

Source

http://oceancolor.gsfc.nasa.gov/SeaWiFS/

and the World Ocean Database.

References

Wood, S.N. (2006) Generalized Additive Models: An Introduction with R. CRC

Examples

  data(chl)
  with(chl,plot(chl,chl.sw))