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Decision XXIII/8: Investigation of carbon tetrachloride discrepancy

Document type
Decision
Reference number
XXIII/8
Date
Nov 25, 2011
Source
UNEP, InforMEA
Status
Active
Subject
Waste & hazardous substances, Air & atmosphere
Treaty
Montreal Protocol on Substances that Deplete the Ozone Layer (Sep 16, 1987)
Meeting
Twenty-Third Meeting of the Parties
Website
ozone.unep.org
Abstract

Taking note of the report from the Technology and Economic Assessment Panel and the Scientific Assessment Panel indicating the existence of a discrepancy between the emissions derived from reported production and consumption data from both parties operating under paragraph 1 of Article 5 and those not so operating and those inferred from atmospheric measurements,

Noting that the Technology and Economic Assessment Panel is continuing its work and will provide information as called for in decision XXI/8 relating to carbon tetrachloride,

  1. To request the Technology and Economic Assessment Panel, in cooperation with the Scientific Assessment Panel, to continue to investigate the possible reasons for the identified discrepancy, considering in particular the extent to which the discrepancy could be due to:
    1. Incomplete or inaccurate historical reporting of carbon tetrachloride produced;
    2. Uncertainties in the atmospheric lifetime of carbon tetrachloride;
    3. Carbon tetrachloride from unreported or underestimated sources from both parties operating under paragraph 1 of Article 5 and those not so operating;
  2. To request the Technology and Economic Assessment Panel to report on its work in response to paragraph 1 above to the Twenty-Fourth Meeting of the Parties;