All Global Stations Isotopic 18O Trends
Description
Black Dots: Monthly average atmospheric Isotopic 18O concentration versus time at stations in the Northern and Southern Hemispheres where 18O concentration is in parts per million in the mole fraction (p.p.m.).
Black Curves: The sum of 4 seasonal harmonics and a spline function to the stations 18O concentration data. The seasonal harmonics include a linear gain factor, to represent increasing amplitude with time.
Station code names are as follows: ALT = Alert, NWT, Canada, PTB = Utqiagvik (formerly Barrow), LJO = La Jolla, BCS = , MLO = Mauna Loa Observatory, KUM = Cape Kumukahi, Hawaii, FAN = Fanning Island, CHR = Christmas Island, SAM = Samoa, KER = Kermadec Island, NZD = Baring Head, New Zealand, and SPO = South Pole.
Data from Scripps CO2 Program.
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)