Regional background O&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; and NO&amp;lt;sub&amp;gt;&amp;lt;i&amp;gt;x&amp;lt;/i&amp;gt;&amp;lt;/sub&amp;gt; in the Houston–Galveston–Brazoria (TX) region: a decadal-scale perspective
Atmospheric chemistry and physics