1. Gunnar W. Schade, C. H. Park I. Boedeker Texas A&M University, College Station, TX

6. Hardy (south bound) Elysian (north bound) Quitman Road (east/west bound)

8. Tower Measurement Setup Tower PAR pyranometer net radiation Sonic WS/WD aspirated T/RH N 3/8’’ and 1/4“ OD PFA Tubes Lag time ≈ 9 s Base Building 60 m 50 m 40 m 20 m 13 m Relaxed Eddy Accumulation GC- FID PC Wind data (10 Hz) w DL CO 2 H 2 O slow: CO, NO x, O 3 EC gradient

18. winter summer

19. weekday weekend

22.  Operated from summers 2007 to 2009  Results very similar to previous urban turbulence research comfortable that site is well-suited for flux measurements flux data is under renewed investigation  Obtained follow-up funding will commence this summer expand with particle flux measurements

23.  Houston Yellow Cab  Texas A&M University startup  Texas Air Research Center  Bernhard Rappenglück  TCEQ