That are initially designated as background, may still be flagged as unlikely to representīackground conditions as information about the following days becomes available. Of the likely valid 'background' hours between successive days.

We require low variability withinĮach hour and between successive hourly averages, as well as a degree of persistence Process is designed to filter out any influence of nearby emissions, or removals, ofĬO 2 such as caused by the vegetation on the island of Hawaii, and likewiseĮmissions from the volcanic crater of Mauna Loa. Measurements representative of CO 2 over hundreds of km or more. Smoothing out most of the CO 2 variability encountered elsewhere, making the That air has had several days time or more to mix, They are presented under Recent Monthly CO 2 at Mauna Loa.īased on hours during which CO 2 was likely representative of “background”Ĭonditions, defined as times when the measurement is representative of air at The 1 year ago weekly value is not plotted on the graph.īlue lines present monthly means of background data as Note that the “ Weekly value from 1 year ago” shown in the boxĪbove the graph is for an average of 7 days starting exactly 365 days before the current week, so it ( red bar) is simply the average of all days in the week (Sunday to Saturday)įor which a background value could be defined. The graph, updated daily, shows as individual points daily mean CO 2, and weekly means up toĪnd including the week previous to today.

Preliminary weekly (red line), monthly (blue line) and daily (green points) averages at Mauna Loa for the last year.

Mauno loa conservatory