Contact: Luping Su, SUNY_STONY BROOK (lusu@ic.sunysb.edu) Data source: PTR-ToF-MS Chemical tower gradient line BVOCs Data format: Tab delimited ASCII text, total of 11 columns 1st column: Sampling date, in the form of Microsoft Excel numeric dates 2nd column: Methanol 3rd column: Acetonitrile 4th column: Acetaldehyde 5th column: Acetone 6th column: Methyl vinyl keton (MVK) 7th column: Methyl ethyl keton (MEK) 8th column: Benzene 9th column: 2-methyl-3-buten-2-ol (MBO) 10th column: Toluene 11th column: Monoterpenes