16 July 2024
10 June 2024
About
The CO2 Monitoring mission (CO2M) will form the key space component of the Copernicus Operational Anthropogenic CO2 Emissions Monitoring & Verification Support (MVS) Capacity. The primary objective of CO2M is to provide maps of atmospheric columnar CO2 abundances with the spatial resolution, precision and accuracy, time sampling and spatial coverage on a global scale required to create emission maps.
In order to achieve this goal, the CO2M mission aims to achieve an unprecedented level of accuracy and precision of space-borne GHG measurements of CO2: within 0.5 ppm and 0.7 ppm respectively. In order to verify these space-borne observations and rapidly identify any anomalies or data processing problems, highly accurate and precise ground-based reference measurements are needed. These measurements are provided by the FTIR spectrometers operated in the framework of the TCCON and the COCCON projects.
This study provides a scientific service to define the nature of the data required from TCCON and COCCON to specifically support CO2M monitoring and validation. Moreover, it elaborates the characteristics and functionalities of a central validation data processing facility to deliver tailored Cal/Val data. The service will develop a prototype of the Central Ground-based Data Processing Facility and process a test set of TCCON and COCCON data for comparison to the official data as provided by these networks. Based on the test dataset, and in cooperation with the EUMETSAT Cal/Val team, QA/QC criteria and further requirements (such as timeliness) for the ground-based data will also be refined.
Objectives
This service covers the following main objectives:
- Prototyping of a central data processing facility for ground-based GHG observations.
- Processing of TCCON and COCCON test datasets.
- Development of QA/QC criteria and the specification of further requirements for ground based CO2M Cal/Val data.
- Documentation of the results in an Algorithm Theoretical Baseline Document (ATBD).
- Support to the implementation of the operational central ground-based data processing facility.
Overview
Activity 1: Scientific Methods
This activity covers the development of the infrastructure and scientific methods required for ground-based data processing. It delivers an implementation of a prototype Central Ground-based Data Processing Facility and an ATBD. This ATBD comprises, amongst other items, the definition of input and output formats for the ground-based measurements and auxiliary data, a comparison of a-priori profiles from different models and the definition and design of an automated QA/QC scheme. In order to match and optimize the approaches, close interaction with the wider CO2M Cal/Val team will be maintained throughout the study.
Definition of Input Formats
Standardized input formats for all incoming data (TCCON, COCCON, auxiliary data) will be specified to support the development of an interface for the ingestion of observations into the Central Facility.
Development and Testing of a Prototype
A prototype of the central Ground-based Data Processing Facility will be developed, based on the latest TCCON and COCCON processing software (GGG2020 and PROFFAST2). A test set of FTIR measurements collected by TCCON and COCCON will then be processed and compared to the official GHG datasets published by the networks.
Assessment of the Timelines and Availability of Ground-based Data
Based on the test set of observations and the available official GHG datasets from the networks, a study to assess the timelines and availability of ground-based data will be conducted with the aim of establishing a best-case scenario in terms of timeliness and data availability and the required prerequisites to achieve this.
Definition of Harmonized Output and QA/QC Scheme
The output data of the central facility will be defined, including filtering by an automated QA/QC scheme tailored to the needs of the CO2M Cal/Val team.
Documentation
The development principles, definitions and structure of the ground-based data processing facility will be documented in an ATBD.
Activity 2: Contribute to the implementation of an operational version
The ATBD and other outputs from Activity 1 will be used to support the industrial implementation of an operation central Ground-Based Data Processing Facility.
