United States Submits Six Working Papers to CAEP/13 Steering Group 2 Meeting

The ICAO Committee on Aviation Environmental Protection (CAEP) held the second Steering Group meeting (SG2) of the CAEP/13 cycle from 16-20 October in Takamatsu, Japan. Consistent with the Biden-Harris administration’s commitments to addressing the climate challenge and tackling environmental issues, the United States submitted four working papers and two information papers seeking to provide guidance to CAEP’s working groups and highlight U.S. efforts to increase climate and environmental ambition.

The papers cover a number of topics and are available below.

WP/46 – Views of the United States on Working Group 4 (WG4) (185 KB)

  • This paper presents the views of the United States on select tasks progressed by each WG4 sub-group, including a recommendation for a CORSIA new entrant baseline option, as well as updates to CORSIA’s tools and analyses.

WP/47 – Views of the United States on Supersonics (122 KB)

  • Progress to-date on these tasks and offers its views on next steps during the CAEP/13 cycle:

1. Supersonic exploratory study public release

2. Supersonic LTO noise Standard

3. En-route noise Standard and Community Testing

4. Supersonic LTO engine emissions

The United States continue to support this work within CAEP, and this paper offers some additional recommendations for CAEP to enable this technology in a harmonized and technically sound manner that also recognizes and addresses the climate and noise impacts of this technology.

WP/48 – Views of the United States on ETA Noise Certification (392 KB)

  • This paper presents the views of the United States on developments regarding Emerging Technology Aircraft (ETA) in the United States, including current ETA noise certification approaches and recent research activities to understand noise from these aircraft. It summarizes U.S. activities supporting ETA noise measurement procedures and noise standard development, identifies non-domestic rulemaking and standard-setting activities of interest to the United States, and makes recommendations for activities that may inform the development of future noise standards and recommended practices (SARPs) in the next CAEP cycle.

WP/49 – Views of the United States on the Integrated CO2/Noise Stringency Work (147 KB)

  • This paper presents views of the United States on the Integrated CO2 Emissions and Noise Stringency Analysis. Specifically, the United States supports the main analysis, including the proposed new-type (NT) stringency options for CO2 and noise, and in-production (InP) stringency options for CO2, as well as the proposed modelling scenarios for use in the analysis. This paper also discusses the work conducted by the United States to develop an Alternative Growth and Replacement Database (GRdb) and proposes next steps for it.

In addition to the above working papers, the United States also supplied the following two information papers to the meeting:

IP/17 – U.S. Data Restrictions (87 KB)

  • This paper presents information on the U.S. efforts to enable data sharing within CAEP for the purposes of developing the integrated analysis for the CO2 and noise standard-setting process.

IP/18 – CO2 and Noise Technology Response Using Publicly Accessible Data Sources (1.54 MB)

  • This paper outlines the methodology and data sources used by the U.S. research team to develop a database using publicly accessible data, an explanation and example of how the technology responses were developed using the data, along with an initial discussion of pros/cons of this approach, and an initial scoping of future work needed to improve the methodology.

CAEP is a technical committee of the ICAO Council established in 1983. CAEP assists the Council in formulating new policies and adopting new Standards and Recommended Practices (SARPs) related to aircraft noise and emissions, and more generally to aviation environmental impact.

CAEP undertakes specific studies, as requested by the Council. Its scope of activities encompasses noise, local air quality (LAQ) and the basket of measures for reducing international aviation CO2 emissions, including aircraft technology, operational improvement, sustainable aviation fuels, and market-based measures (CORSIA).

CAEP informs the Council’s and Assembly’s decision making with the ICAO Global Environmental Trends, which assess the present and future impact of aircraft noise and aircraft engine emissions. The Global Environmental Trends is crucial to the work of ICAO as it provides a robust single reference for sound discussion and decision-making.

The Council reviews and adopts CAEP recommendations, including amendments to the SARPs, and in turn reports to the ICAO Assembly where the main policies on environmental protection are ultimately defined.