Carbon Dioxide Equivalent Intensity Index

The Carbon Dioxide Equivalent Intensity Index (CDEII) is calculated under a formal framework contained within the National Electricity Rules and replaces the informal Greenhouse Intensity Index published by AEMO’s predecessor NEMMCO.

The CDEII calculation combines sent out metering data with publicly-available generator emission and efficiency data to provide a National Electricity Market (NEM)-wide CDEII which is calculated on a daily basis and published weekly to the AEMO website in accordance with the timing of the issue of preliminary statements.

IMPORTANT NOTE:
From 1 June 2014, the emission data used in calculating the CDEII changed from estimated to actual emission data via the National Greenhouse and Energy Reporting (NGER) scheme. An impact assessment performed for 2012/13 financial year indicates that this new data source would have resulted in the CDEII result being on average 2.5% higher than the published CDEII. The change to data source should be taken into consideration when analysing the change to CDEII over time. Further detail on this change can be found below under CDEII input data change – June 2014.

CDEII Information update – November 2014
The CDEII information update provides guidance on the structure and application of the CDEII from June 2014.

CDEII Information update – November 2014
2014 | filesize: 114 kb

CDEII Index Results

Index Results - Current Year

The Summary Results File below, for the current year, contains the daily summarised regional and NEM-wide CDEII results. Emission factors used in calculating the CDEII from June 2014 are based on NGER data.

Summary Results File - Current Year
2015 | filesize: 82.1 kb

Index Results - Historical

The Summary Results Files below contain the daily summarised regional and NEM-wide CDEII results. Emission factors used in calculating the CDEII to May 2014 are based on estimated data. Emission factors used in calculating CDEII from June 2014 are based on NGER data.

Summary Results File 2015
2014 | filesize: 177 kb
Summary Results File from 1 June to December 2014
2014 | filesize: 82.1 kb
Summary Results File January to May 2014
2014 | filesize: 36.1 kb (.csv)
Summary Results File 2013
2013 | filesize: 89.3 kb (.csv)

Summary Results File 2012
2012 | filesize: 120.00 kb (.csv)

Summary Results File 2011
2011 | filesize: 109 kb (.csv)
 

Available Generators File

List of all available generating units for electricity production in the current CDEII reporting week.

Available Generators File
filesize: 35.5 Kb (.csv)

AEMO CDEII Procedure

The AEMO CDEII Procedure document describes the methodology used to calculate the CDEII. 

Carbon Dioxide Equivalent Intensity Index Procedure v3
29 Dec 2014 | 283 kb (.pdf)

CDEII Input Data Change - June 2014

AEMO has produced an impact assessment using a new source of emission data and proposed next steps to integrate this source into planning activities and calculation of the CDEII.

NEM Power Station Emission Intensities
21 Jan 2014 | filesize: 180 kb (.pdf)

NEM Power Station Emission Intensities - Updated Impact Assessment
07 May 2014 | filesize: 169 kb (.pdf)

For further information please contact AEMO's Information & Support Hub.