Chapter Six
===========

Data analysis concepts and observational methods
------------------------------------------------

.. toctree::
  :maxdepth: 2
  :caption: Contents:

  6a
  6b
  6c
  6d
  6e
  6f

.. admonition:: Data files supplied for Chapter 6 exercises

  * HOT_bottle_nutrient_data.joa
  * P16_2005_2006_clean_bottle.joa
  * WOA05_NorthAtlantic_square.joa
  * WOA09_P16.joa

  Download: :download:`Chapter 6 Data Files <./DPO_data_chapter_6.7z>`

Goals
`````
* Gain familiarity with useful oceanographic analysis and presentation tools
* Learn more about oceanographic features

JOA Note
````````
* JOA's tool set is described more comprehensively in the JOA User Guide


DPO Chapter 6 Sections
``````````````````````

DPO JOA examples are available for the following **emphasized** sections:

.. list-table::
  :widths: 10, 90

  * - 6.1
    - Oceanographic sampling
  * - 6.2
    - Observational error
  * - 6.3
    - Basic statistical concepts
  * - 6.3.1
    - Mean, variance, standard deviation and standard error
  * - 6.3.2
    - Probability density function
  * - 6.3.3
    - Covariance, auto-covariance, integral time scale, degrees of freedom and confidence intervals
  * - 6.3.4
    - Least squares analysis
  * - 6.4
    - Variation in space: profiles, vertical sections and horizontal maps
  * - 6.4.1
    - Variation in the vertical direction
  * - 6.4.1.1
    - Sampling
  * - 6.4.1.2
    - Vertical profiles
  * - 6.4.1.3
    - Vertical sections
  * - 6.4.2
    - Variation in the horizontal direction
  * - 6.5
    - Variation in time
  * - 6.5.1
    - Time series data display
  * - 6.5.2
    - Velocity (vector) data time-series analysis
  * - 6.5.3
    - Spectral analysis
  * - 6.5.4
    - Filtering data
  * - 6.6
    - Multi-dimensional sampling
  * - 6.6.1
    - Multi-dimensional time series data and empirical orthogonal functions
  * - 6.6.2
    - Climatologies and atlases
  * - 6.7
    - Water property (water mass) analyses
  * - 6.7.1
    - Analysis using two characteristics, e.g. (–S, S–O2
  * - 6.7.2
    - Volumetric (-S characteristics of ocean waters
  * - 6.7.3
    - Optimum multiparameter analysis (OMP)
  * - 6.8
    - Glossary