Trace gas datasets

NIWA makes a range of trace gas data freely available on our FTP site.

NIWA makes the following trace gas data freely available on our ftp site, on condition that it is correctly credited (see use of data below). Many of these datasets are also available from the World Data Centre for Greenhouse Gases,

Access Tropac data

  • methane
  • carbon monoxide
  • carbon dioxide
  • Non-methane hydrocarbons (C2H2, C2H4, C2H6, C3H6, C3H8, C6H6, C6H7, iC4H10, nC4H10, iC5H12, nC5H12 )
  • nitrous oxide
  • surface ozone

Measured at the following locations:

Arrival Heights, Scott Base, Antarctica (arh)

Baring Head clean air station (bhd)

Lauder atmospheric research station (lau)

Sampling across the Pacific Ocean on Blue Star Line ships (BSL) between New Zealand and the United States, and Fuji TransWorld (FTW) ships between New Zealand and Japan. (pac)

University of the South Pacific, Suva, Fiji (suv)

All data files are ASCII text files organised as columns of data with one or more spaces as column separators. Follow this link for details of naming conventions and data formats. 

Details of naming conventions and data formats

Use of data

All use of the data described here is subject to the condition that the appropriate NIWA scientists and publications are cited as the source of the data. The correct forms of citation are given in files named “readme.txt” or “readme.doc” in the subdirectories closest to the corresponding data files.

NIWA’s trace gas data is intended for scientific research, has not been quality controlled and may be corrected, updated, changed or withdrawn at any time without notification. We recommend users use the most current data and in all cases be aware of the relevant scientific literature before interpreting the data. Users use the data at their own risk and NIWA disclaims and waives all liability.

If you are unsure of the uses to which the data may be put or require further details about the data, please use the contact details below.