2019 - Draft Charter

TCCON Charter

This page is restricted.

The Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier Transform Spectrometers that record direct solar spectra in the near-infrared. From these spectra, accurate and precise column-averaged abundances of atmospheric constituents including CO2, CH4, N2O, HF, CO, H2O, O2 and HDO, are retrieved.

The TCCON is a partnership of the individual sites that comprise the network. TCCON participants agree to adhere to a common set of standards for instrumentation, data acquisition, calibration, and analysis as determined by the TCCON Steering Committee.

The TCCON Steering Committee, comprising one representative from each site, is charged with making policy for the network. TCCON partners in each region will recommend a representative from their region to the Steering Committee, who will vote to accept the nomination. The committee can invite further members onto the Steering Committee. This committee is also responsible for admission of new sites into the network and for setting data quality standards. The Steering Committee is led by a chair and co-chairs, supported by deputies, all of whom are elected by the [Steering Committee or all?] members to a three year term. Policy changes to the Charter and/or Protocol are made on a 2/3 vote of the Steering Committee with one vote per site. 



The Chair oversees the Steering Committee and is responsible for external communications.

The Chair is selected from one of the co-chairs by a vote of the co-chairs and deputy chairs.

The Chair position is held for a 3-year term, which is renewable.

2017-2020 Chair - Paul Wennberg (wennberg@caltech.edu)


The Co-Chairs are selected based on timezone/geography: one from the Americas (-12 to -2 UT), one from Europe/Africa (-1 to +3 UT) and one from the Western Pacific (+4 to +12 UT).

The Chair and Co-Chairs are responsible for:

  • Providing support for TCCON partners' proposals by writing letters of support, etc.
  • Providing guidance on paper coauthorships.
  • Enforcing the TCCON Data Use Policy to the best of their ability.
  • Maintaining relationships with NDACC and other relevant networks.

The Co-Chair positions are held for a 3-year term, which is renewable.

2017-2020 European/African Co-Chair -Justus Notholt (jnotholt@iup.physik.uni-bremen.de)

2017-2020 Western Pacific Co-Chair - David Griffith (griffith@uow.edu.au)

2017-2020 Americas Co-Chair - Paul Wennberg (wennberg@caltech.edu)

Deputy Chairs

The Deputy Chairs are selected based on timezone/geography: one from the Americas, one from Europe/Africa (Europe/Ascension/Reunion) and one from the Western Pacific (Asia/Australia/New Zealand).

The Deputy Chair positions are held for a 3-year term, which is renewable.

2017-2020 European/African Deputy Chair - Dietrich Feist <dfeist@bgc-jena.mpg.de>

2017-2020 Western Pacific Deputy Chair - Nicholas Deutscher <ndeutsch@uow.edu.au>

2017-2020 Americas Deputy Chair -Debra Wunch <dwunch@atmosp.physics.utoronto.ca>

Responsibilities of the Chairs and Deputies

Together, the chair, co-chairs and deputies are responsible for (and can distribute as necessary):

  • Organizing the TCCON annual meetings and telecons
  • Following up on action items from the TCCON meetings and telecons
  • Guiding the future of TCCON, with input from the Steering Committee
  • Providing technical support (hardware and software) for the TCCON partners in their region, including collecting GGG Licenses
  • Linking with the scientific/modeling/satellite community to provide new opportunities to use and improve TCCON data
  • Ensuring TCCON is represented at relevant meetings/conferences, where necessary
  • Representing TCCON to funding agencies
  • Defining future needs for the TCCON retrieval, with input from those writing the algorithm and the Steering Committee
  • Stimulating science within the community

Steering Committee

The TCCON is a partnership of the individual sites that comprise the network.  TCCON participants agree to adhere to a common set of standards for instrumentation, data acquisition, calibration, and analysis, and participants agree to share all their data in accordance with the Steering Committee's decisions. A Steering Committee comprised of one principal investigator from each site (and additional members named to the Steering Committee by agreement of the PIs) has the following responsibilities:

  • establish, refine, and maintain standards for TCCON data products, and their precision and accuracy
  • [approve simple, objective criteria to determine data flags for public release - is this really the job of the steering committee? This has been done by the algorithm team to date.]
  • evaluate and accept new members
  • facilitate and assist where possible, in science studies using TCCON data
  • report activities to the TCCON meetings and teleconferences

The broader TCCON Science Team includes co-Is identified by the PIs.

Current Sites and Steering Committee Representatives

  Site Voting Representative Contact Information Co-I Co-I Contact Information
1 Park Falls Coleen Roehl coleen@gps.caltech.edu    
2 Lamont        
3 Caltech        
4 Lauder Dave Pollard Dave.Pollard@niwa.co.nz    
5 Garmisch Ralf Sussmann ralf.sussmann@kit.edu Markus Rettinger markus.rettinger@kit.edu
6 Ascension Island Dietrich Feist dfeist@bgc-jena.mpg.de    
7 Karlsruhe Frank Hase frank.hase@kit.edu    
8 Darwin Nicholas Deutsher ndeutsch@uow.edu.au Velazco voltaire@uow.edu.au
9 Wollongong David Griffith griffith@uow.edu.au Velazco voltaire@uow.edu.au
10 Eureka Kimberly Strong strong@atmosp.physics.utoronto.ca    
11 BialystokCyprus? Nicholas Deutscher n_deutscher@iup.physik.uni-bremen.de Christof Petri christof_p@iup.physik.uni-bremen.de
12 Ny Alesund Matthias Buschmann m_buschmann@iup.physik.uni-bremen.de Justus Notholt notholt@iup.physik.uni-bremen.de
13 Bremen Justus Notholt jnotholt@iup.physik.uni-bremen.de Nicholas Deutscher n_deutscher@iup.physik.uni-bremen.de
14 Orléans Thorsten Warneke warneke@iup.physik.uni-bremen.de Nicholas Deutscher n_deutscher@iup.physik.uni-bremen.de
15 Sodankyla Rigel Kivi rigel.kivi@fmi.fi Pauli Heikkinen Pauli.Heikkinen@fmi.fi
16 Izana Matthias Schneider matthias.schneider@kit.edu    
17 Tsukuba Isamu Morino morino@nies.go.jp    
18 Rikubetsu        
19 Réunion Martine de Mazière Martine.DeMaziere@bira-iasb.oma.be    
20 Saga Shuji Kawakami kawakami.shuji@jaxa.jp Hirofumi Ohyama ohyama.hirofumi@jaxa.jp
21 Anmyeondo        
22 Edwards Laura Iraci      
23 East Trout Lake Debra Wunch dwunch@atmosp.physics.utoronto.ca    
24 Paris        
25 Burgos        
26 Duke Forest        


Add Burgos PI/CoPI Morino/Velazco, or vice versa

Additional Members of the Steering Committee

These additional members are responsible for other aspects of the network, for example, the TCCON software algorithm, hardware development, and former TCCON chairs or co-chairs.

Voting Representative Contact Information
Geoffrey Toon geoffrey.c.toon@jpl.nasa.gov
Jean-Francois Blavier blavier@caesar.jpl.nasa.gov
Paul Wennberg wennberg@caltech.edu


Steering Committee Emeritus

Brian Connor

Status of past co chairs? - How about: they should be allowed a vote if they choose.

New TCCON Members

New sites will be considered by the TCCON Steering Committee by application. Demonstration of required hardware and facility with TCCON processing is required, following a defined template (e.g., the ETL Application), as is data delivery to the TCCON archive. New sites are considered provisional until demonstration of accuracy with in situ profiles or other means approved by the Steering Committee. TCCON status is maintained by providing up-to-date data (i.e., no older than 1 year) to the TCCON archive. It is preferred that the data are delivered to the archive well within that timeframe.

How to deal with sites that will probably never be able to get in situ profiles?

TCCON Meeting and Telecons

TCCON has a yearly general assembly of all members and bi-monthly telecons.

The assembly has the following assignments:

  • evaluate software and spectral linelists used for ‘standard’ TCCON data products
  • review details of the data processing and data distribution
  • review data flags
  • provide TCCON site report (in writing for existing stations or orally for new stations)
  • report on central activities within TCCON
  • describe recent science investigations
  • plan future activities (e.g. intercomparisons, software changes, spectroscopic upgrades, etc.)
  • take part in the Network for the Detection of Atmospheric Compostion Change - Infrared (NDACC-IR) working group and/or the International Workshop on Greenhouse Gas Measurements from Space (IWGGMS) meetings

TCCON Telecons are bi-monthly tag-ups where we discuss:

  • Recent hardware failures or solutions
  • Ongoing software development and bug reports
  • Ongoing scientific investigations
  • Planning ongoing activities
  • Implementing policy (i.e., voting)
  • Following up on action items from the annual meetings and telecons

At least one representative from each site is expected to attend the telecons.

TCCON Network Affiliations

  • The TCCON is closely affiliated with the Network for the Detection of Atmospheric Composition Change Infrared Working Group (NDACC-IRWG). The NDACC website can be found at www.ndacc.org and the IRWG website at www.acd.ucar.edu/irwg. The NDACC Infrared Working Group and TCCON have many common members, strong scientific and operational links and they recognize a mutual benefit from each other’s expertise. The Cooperative Agreement between NDACC and TCCON is in the MOU document attached, as is the official welcome to the NDACC steering committee.
  • TCCON is formally a contributing network to the WMO Global Atmosphere Watch (GAW, MOU/letter attached.

     [DG1]Paul, I have your acceptance letter from Len Barrie, but I can’t find his letter of invitation to join. 

TCCON Website

The TCCON Website (http://www.tccon.caltech.edu) is currently employed as a brief introduction to the network, and provides links to the wiki, the OCO project website, the GOSAT website and the SCIAMACHY website. [If you Google "TCCON", the website is still the first hit, so we're reluctant to get rid of the page.]


The TCCON-wiki (https://tccon-wiki.caltech.edu) contains the necessary information needed for data acquisition and analysis. It also serves as central knowledge repository where we can assess, discuss and improve our data quality.

TCCON Data Archive

TCCON data are accessible from https://tccondata.org/


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