Xinrong Ren

Atmospheric photochemistry and its impact on air quality, including atmospheric free radical chemistry, model prediction of atmospheric oxidation processes, heterogeneous chemical reactions, spectroscopic and chromatographic detection techniques, field measurement of atmospheric trace gases and radical species. Current research work is focused on nitrogen chemistry in urban, forested, and marine environments. Particularly, a sensitive system based on the long path photometric technique is being developed to detect trace-level nitrous acid (HONO) and nitric acid (HNO3) in the atmosphere. This system has been deployed in field studies to investigate the HONO and HNO3 chemistry and their roles in the atmospheric oxidation processes. Laboratory studies regarding heterogeneous chemistry of nitrogen species, including HONO, HNO3, and NOx, which will improve our understanding on the budget of HONO and HNO3, thus reduce the uncertainties in the model predictions in local, regional and global scales.

Fried, A. J. Olson, J. Walega, J. Crawford, G. Chen, P. Weibring, D. Richter, C. Roller, F. Tittel, M. Porter, H. Fuelberg, J. Halland, T. Bertram, R. Cohen, K. Pickering, B. Heikes, J. Snow, H. Shen, D. O’Sullivan, W. Brune, X. Ren, D. Blake, N. Blake, G. Sachse, G. Diskin, J. Podolske, S. Vay, R. Shetter, S. Hall, B. Anderson, L. Thornhill, A. Clarke1, C. McNaughton, H. Singh, M. Avery, G. Huey, S. Kim, and D. Millet, The role of convection in redistributing formaldehyde troposphere over North America and the North Atlantic 2004 INTEX Campaign, J. Geophys. Res., in press, 2008.

Ren, X., J. R. Olson, J. H. Crawford, W. H. Brune, J. Mao, R. B. Long, G. Chen, M. A. Avery, G. W. Sachse, J. D. Barrick, G. S. Diskin, L. G. Huey, A. Fried, R. C. Cohen, B. Heikes, P. Wennberg, H. B. Singh, D. R. Blake, R. E. Shetter, HOx Chemistry during INTEX-A 2004: Observation, Model Calculations and comparison with previous studies, 113, D05310, doi:10.1029/2007JD009166, J. Geophys. Res., 2008.

Hudman, R. C., D. J. Jacob, S. Turquety, E. M. Leibensperger, L. T. Murray, S. Wu, A. B. Gilliland, M. Avery, T. H. Bertram, W. Brune, R. C. Cohen, J. E. Dibb, F. M. Flocke, A. Fried, J. Holloway J. A. Neuman, R. Orville, A. Perring, X. Ren, G. W. Sachse, H. B. Singh, A. Swanson, P. J. Wooldridge, Surface and lightning sources of nitrogen oxides over the United States: magnitudes, chemical evolution, and outflow, J. Geophys. Res., 112, D12S05, doi:10.1029/2006JD007912, 2007

Liang, Q., L. Jaegle, R. Hudman, S. Turquety, D. Jacob, M. Avery. G. Sachse, D. Blake, E. Browell, W. Brune, X. Ren, R. Cohen, J. Dibb, G. Huey, H. B. Singh, P. Wennberg, L. Pfister, H. Fuelberg, Summertime influence of Asian pollution in the middle and upper troposphere during INTEX-A, submitted to J. Geophys. Res., 112, doi:10.1029/2006JD007919, 2007

Venkatachari, P., P. K. Hopke, W. H. Brune, X. Ren, R. Lesher, J. Mao, M. Mitchell, Characterization of wintertime reactive oxygen species concentrations in Flushing, New York, Aerosol Sci. Technol., 41, 97-111, 2007

Kim, S., L. G. Huey, R. E. Stickel, D. J. Tanner, J. H. Crawford, J. R. Olson, G. Chen, W. H. Brune, X. Ren, R. Lesher, P. J. Wooldridge, T. H. Bertram, A. Perring, R. C. Cohen, B. L. Lefer, R. E. Shetter, M. Avery,  G. Diskin, and I. Sokolik, Measurement of HO₂NO₂ in the free troposphere during the Intercontinental Chemical Transport Experiment-North America 2004, J. Geophys. Res., 112, D12S01, doi:10.1029/2006JD007676, 2007

Cooper, O. R., A. Stohl, M. Trainer, A. M. Thompson, J. C. Witte, S. J. Oltmans, G. Morris, K. E. Pickering, J. H. Crawford, G. Chen, R. C. Cohen, T. H. Bertram, P. Wooldridge, A. Perring, W. H. Brune, J. Merrill, J. L. Moody, D. Tarasick, P. Nedelec, G. Forbes, M. J. Newchurch, F. J. Schmidlin, B. J. Johnson, S. Turquety, S. L. Baughcum, X. Ren, F. C. Fehsenfeld, J. F. Meagher, N. Spichtinger, C. C. Brown, S. A. McKeen, I. S. McDermid, and T. Leblanc, Large upper tropospheric ozone enhancements above midlatitude North America during summer: In situ evidence from the IONS and MOZAIC ozone measurement network, J. Geophys. Res., 111, D24S05, doi:10.1029/2006JD007306, 2006

Ren, X., W. H. Brune, A. Oliger, A. R. Metcalf, J. B. Simpas, T. Shirley, J. J. Schwab, C. Bai, U. Roychowdhury, Y. Li, C. Cai, K. L. Demerjian, Y. He, X. Zhou, H. Gao, and J. Hou, OH, HO₂ and OH reactivity during the PMTACS-NY Whiteface mountain 2002 campaign: Observations and model comparison, J. Geophys. Res., 111, D10S03, doi:10.1029/2005JD006126, 2006

Ren, X., W. H. Brune, J. Mao, M. J. Mitchell, R. L. Lesher, J. B. Simpas, A. R. Metcalf, J. J. Schwab, Y. Li, K. L. Demerjian, H. D. Felton, G. Boynton, A. Adams, J. Perry, Y. He, X. Zhou, and J. Hou, HOx in the winter urban atmosphere in New York City: Observations and model comparison, Atmos. Environ., 40, S252-S263, 2006

Shirley, T. R., W. H. Brune, X. Ren, J. Mao, R. Lesher, B. Cardenas, R. Volkamer, L. T. Molina, M. J. Molina, B. Lamb, E. Velasco, T. Jobson, and M. Alexander, Atmospheric oxidation in the Mexico City Metropolitan Area (MCMA) during April 2003, Atmos. Chem. Phys., 6, 2753-2765, 2006

Ren, X., W. H. Brune, C. A. Cantrell, and G. D. Edwards, T. Shirley, A. R. Metcalf, R. L. Lesher, Hydroxyl and peroxy radical chemistry in a rural area of Central Pennsylvania: Observations and model comparisons, J. Atmos. Chem., 52, 231-257, 2005

Ren, X., L. Wang, H. Wang, and G. Miao, Conversion rates of surface HOx radicals in Beijing City, Chinese Geograph. Sci., 14 (1), 34-38, 2004

Shao, M., X. Ren, H. Wang, L. Zeng, Y. Zhang, and X. Tang, Quantitative relationship between production and removal of OH and HO₂ radicals in urban atmosphere, Chinese Science Bulletin, 49(21), 2253-2257, 2004

Ren, X., H. Wang, K. Shao, X. Tang, Preliminary study of HOx photochemical processes in urban atmosphere of Guangzhou City, Chinese J. Environ. Sci., 2004, 25(4), 28-31, 2004

Di Carlo, P., W. H. Brune, M. Martinez, H. Harder, R. Lesher, X. Ren, T. Thornberry, M. A. Carroll, V. Young, P. Shepson, D. Riemer, E. Apel, Missing OH reactivity in a forest: Evidence for unknown reactive terpenes, Science, 304 (5671), 722-725, 2004

Ren, X., H. Harder, M. Martinez, I. C. Faloona, D. Tan, R. L. Lesher, P. Di Carlo, J. B. Simpas, and W. H. Brune, Interference testing for atmospheric HOx measurements by laser-induced fluorescence, J. of Atmos. Chem., 47(2), 169-190, 2004

Faloona, I. C., D. Tan, R. L. Lesher, N. L. Hazen, C. L. Frame, J. B. Simpas, H. Harder, M. Martinez, P. Di Carlo, X. Ren, and W. H. Brune, A Laser Induced Fluorescence Instrument for Detecting Tropospheric OH and HO₂: Characteristics and Calibration, Journal of Atmos. Chem., 47(2), 139-167, 2004

M. Martinez, H. Harder, X. Ren, R. L. Lesher, W. H. Brune, Measuring atmospheric naphthalene with laser-induced fluorescence, Atmos. Chem. & Phys., 4, 563-569, 2004

Ren, X., H. Harder, M. Martinez, R. L. Lesher, A. Oliger, J. B. Simpas, W. H. Brune, J. J. Schwab, K. L. Demerjian, Y. He, X. Zhou, and H. Gao, OH and HO₂ chemistry in the urban atmosphere of New York City, Atmos.Environ., 37(26), 3627-3637, 2003

Ren, X., H. Harder, M. Martinez, R. L. Lesher, A. Oliger, T. Shirley, J. Adams, J. B. Simpas, W. H. Brune, HO_x concentrations and OH reactivity observations in New York City during PMTACS-NY2001, Atmos.Environ., 37(26), 3639-3651, 2003

Ren, X., G. D. Edwards, C. A. Cantrell, R. L. Lesher, A. R. Metcalf, T. Shirley, and W. H. Brune, Intercomparison of peroxy radical measurements at a rural site using laser-induced fluorescence and Peroxy Radical Chemical Ionization Mass Spectrometer (PerCIMS) techniques, J. Geophys. Res., 108(D19), 4605, doi:10.1029/2003JD003644, 2003

Ren, X., H. Wang, K. Shao, G. Miao, X. Tang, Determination and characteristics of OH radical in urban atmosphere in Beijing, ChineseJ. Environ. Sci.23(4), 24-27, 2002

Ren, X.,  K. Shao, and X. Tang, Determination of salicylic acid and its hydroxylated products using high performance liquid chromatography and fluorescence detection, Chinese J. Chromatogr.,19(2), 191-192, 2001

Ren, X., K. Shao, and S. Tang, Measurement of gas-phase OH using liquid phase scrubbing and high performance liquid chromatography, Environ. Chem., 20(1), pp.81-85, 2001

Ren, X., K. Shao, and X. Tang, Determination of hydroxyl radical concentration in the atmosphere, China Environ. Sci., 21(2), 115-118, 2001

Ren, X., J. Wu, K. Shao, and X. Tang, Advances in measurement of atmospheric peroxy radicals, Environ. Sci. Technol., 8(3), 5-9, 2001

X. Ren, K. Shao, and X. Tang, Establishment of OH radical measurement using laser-induced fluorescence technique, Chinese J. Spectros. Lab., 17(2), 125-128, 2000

Ren, X., M. Otting, K. Shao, and X. Tang, Establishment and study of the absolute calibration system of hydroxyl radical detection, Acta Scientiae Circumstantiae, 20(6), 688-692, 2000

Ren, X., Z. Liu, M. Otting, K. Shao, and X. Tang, The study of OH concentration in OH generating systems by long path FTIR, Chinese J. Environ. Sci., 20(6), 26-29, 1999

Ren, X., J. Wu, H. Tian, and X. Tang, Advances in measurement of atmospheric OH radical using laser-induced fluorescence technique, Adv. Environ. Sci., 7(6), 13-20, 1999

Li, S., Z. Chen, X. Ren, K. Shao, and X. Tang, Study of organic hydroperoxides and H₂O₂ yields in isoprene and O₃ reactions, Chinese J. Environ. Sci., 18(6), 16-18, 1997