Mauna Loa Observatory, Hawaii

Map of Mauna Loa Observatory, Hawaii
Station NameStation CodeLatitudeLongitudeElevation (m)Dates
Mauna Loa Observatory, HawaiiMLO19.5 °N155.6 °W33971958 - present
These data are subject to revision based on recalibration of standard gases.
Download all Mauna Loa Observatory, Hawaii data sets

Individual Data sets

In-situ CO2 Data

MeasurementFrequencyData FileDates
CO2weeklyweekly_in_situ_co2_mlo.csv1958 - present
CO2monthlymonthly_in_situ_co2_mlo.csv1958 - present
CO2dailydaily_in_situ_co2_mlo.csv1958 - present
CO2ten minuteten_minute_in_situ_co2_mlo.zip1958 - 2004

Flask CO2 Data

MeasurementFrequencyData FileDates
CO2dailydaily_flask_co2_mlo.csv1960 - present
CO2monthlymonthly_flask_co2_mlo.csv1960 - present

Flask Isotopic Data

MeasurementFrequencyData FileDates
13C/12Cdailydaily_flask_c13_mlo.csv1978 - present
13C/12Cmonthlymonthly_flask_c13_mlo.csv1980 - present
14C/Cintermittentintermittent_flask_c14_mlo.csv2001 - 2007
18O/16Odailydaily_flask_o18_mlo.csv1978 - present
18O/16Omonthlymonthly_flask_o18_mlo.csv1980 - present

Combined Data sets

Flask CO2 and Isotopic Data

MeasurementFrequencyData FileDates
CO2 and Isotopesdailydaily_flask_co2_isotopes_mlo.csv1958 - present

Citation

Please cite as:

C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and H. A. Meijer, Exchanges of atmospheric CO2 and 13CO2 with the terrestrial biosphere and oceans from 1978 to 2000. I. Global aspects, SIO Reference Series, No. 01-06, Scripps Institution of Oceanography, San Diego, 88 pages, 2001.

If it is necessary to cite a peer-reviewed article, please cite as:

C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and H. A. Meijer, Atmospheric CO2 and 13CO2 exchange with the terrestrial biosphere and oceans from 1978 to 2000: observations and carbon cycle implications, pages 83-113, in "A History of Atmospheric CO2 and its effects on Plants, Animals, and Ecosystems", editors, Ehleringer, J.R., T. E. Cerling, M. D. Dearing, Springer Verlag, New York, 2005.

Usage Restrictions

Scripps CO2 program data and graphics on scrippsco2.ucsd.edu are licensed under a CC BY license, Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which clarifies appropriate uses and requirements, including that credit be given to the Scripps Institution of Oceanography at UC San Diego. Some products from this site incorporate data from sources external to the Scripps CO2 program, as indicated. Additional credit must be given for these products, as appropriate for that source.

Ethical usage may also require disclosing intentions at early stages to avoid duplicating ongoing studies at Scripps or elsewhere. For applications supporting peer-reviewed scientific publications, coauthorship may sometimes be appropriate. An example would be if an important result or conclusion depends on this product, such as the first account of a previously unreported phenomenon.

Please direct queries to Ralph Keeling (rkeeling@ucsd.edu)