TexAQS Revisited - A Comparison of VOC Measurements in the LaPorte, Texas Vicinity From 2000 and 2006

Gas phase volatile organic compounds (VOCs) were measured by gas chromatography as part of the TexAQS2K campaign during August-September 2000 in LaPorte, Texas then again aboard the NOAA ship Ronald H. Brown while sailing in the Houston vicinity in August-September 2006 supporting the TexAQS06 campaign. Data acquired in 2006 at Barbours Cut, about 4 miles east of the TexAQS2K sampling site, will be compared with results from the earlier campaign. Generally, VOC mixing ratios appear to have decreased over the 6-year interval from 0-40% depending on species. Whether this is due to meteorology, location or actual emission reduction will be discussed at the meeting.