Freya Squires

Search results

• 2023

  Flaring efficiencies and NO_x emission ratios measured for offshore oil and gas facilities in the North Sea

  Shaw, J. T., Foulds, A., Wilde, S., Barker, P., Squires, F. A., Lee, J., Purvis, R., Burton, R., Colfescu, I., Mobbs, S., Cliff, S., Bauguitte, S. J. B., Young, S., Schwietzke, S. & Allen, G., 26 Jan 2023, In: Atmospheric Chemistry and Physics. 23, 2, p. 1491-1509 19 p.

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• 2022

  Daily evolution of VOCs in Beijing: chemistry, emissions, transport, and policy implications [version1, peer review]

  Panagi, M., Sommariva, R., Fleming, Z. L., Monks, P. S., Lu, G., Marais, E. A., Hopkins, J. R., Lewis, A. C., Zhang, Q., Lee, J. D., Squires, F. A., Whalley, L. K., Slater, E. J., Heard, D. E., Woodward-Massey, R., Ye, C. & Vande Hey, J. D., 27 Jun 2022, (Accepted/In press) In: Atmospheric Chemistry and Physics Discussions. 2022, p. 1-29 29 p.

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• Eddy covariance measurements highlight sources of nitrogen oxide emissions missing from inventories for central London

  Drysdale, W. S., Vaughan, A. R., Squires, F. A., Cliff, S. J., Metzger, S., Durden, D., Pingintha-Durden, N., Helfter, C., Nemitz, E., Grimmond, C. S. B., Barlow, J., Beevers, S., Stewart, G., Dajnak, D., Purvis, R. M. & Lee, J. D., 21 Jul 2022, In: Atmospheric Chemistry and Physics. 22, 14, p. 9413-9433 21 p.

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• 2021

  Direct measurements of black carbon fluxes in central Beijing using the eddy covariance method

  Joshi, R., Liu, D., Nemitz, E., Langford, B., Mullinger, N., Squires, F., Lee, J., Wu, Y., Pan, X., Fu, P., Kotthaus, S., Grimmond, S., Zhang, Q., Wu, R., Wild, O., Flynn, M., Coe, H. & Allan, J., 8 Jan 2021, In: Atmospheric Chemistry and Physics. 21, 1, p. 147-162 16 p.

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• Evaluating the sensitivity of radical chemistry and ozone formation to ambient VOCs and NO_x in Beijing

  Whalley, L. K., Slater, E. J., Woodward-Massey, R., Ye, C., Lee, J. D., Squires, F., Hopkins, J. R., Dunmore, R. E., Shaw, M., Hamilton, J. F., Lewis, A. C., Mehra, A., Worrall, S. D., Bacak, A., Bannan, T. J., Coe, H., Percival, C. J., Ouyang, B., Jones, R. L., Crilley, L. R., & 14 othersKramer, L. J., Bloss, W. J., Vu, T., Kotthaus, S., Grimmond, S., Sun, Y., Xu, W., Yue, S., Ren, L., Acton, W. J. F., Hewitt, C. N., Wang, X., Fu, P. & Heard, D. E., 12 Feb 2021, In: Atmospheric Chemistry and Physics. 21, 3, p. 2125-2147 23 p.

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• Insights into air pollution chemistry and sulphate formation from nitrous acid (HONO) measurements during haze events in Beijing

  Bloss, W. J., Kramer, L., Crilley, L. R., Vu, T., Harrison, R. M., Shi, Z., Lee, J. D., Squires, F. A., Whalley, L. K., Slater, E., Woodward-Massey, R., Ye, C., Heard, D. E., Tong, S., Hou, S., Sun, Y., Xu, J., Wei, L. & Fu, P., 21 Sep 2021, (E-pub ahead of print) In: FARADAY DISCUSSIONS. 226, p. 223-238 16 p.

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• Key role of NO3 radicals in the production of isoprene nitrates and nitrooxyorganosulfates in Beijing

  Hamilton, J., Bryant, D., Edwards, P., Ouyang, B., J. Bannan, T., Mehra, A., Mayhew, A., Hopkins, J. R., Dunmore, R. E., Squires, F., Lee, J. D., Newland, M., Worrall, S. D., Basak, A., Coe, H., Percival, C. J., Whalley, L. K., Heard, D. E., Slater, E., Jones, R. L., & 9 othersCui, T., Surratt, J. D., Reeves, C. E., Mills, G., Grimmond, S., Sun, Y., Xu, W., Shi, Z. & Rickard, A. R., 7 Jan 2021, In: Environmental Science and Technology. 55, 2, p. 842–853 12 p.

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• Low-NO atmospheric oxidation pathways in a polluted megacity

  Newland, M. J., Bryant, D. J., Dunmore, R. E., Bannan, T. J., Joe, W., Langford, B., Hopkins, J. R., Squires, F. A., Dixon, W., Drysdale, W. S., Ivatt, P. D., Evans, M. J., Edwards, P. M., Whalley, L. K., Heard, D. E., Slater, E. J., Woodward-Massey, R., Ye, C., Mehra, A., Worrall, S. D., & 11 othersBacak, A., Coe, H., Percival, C. J., Nicholas Hewitt, C., Lee, J. D., Cui, T., Surratt, J. D., Wang, X., Lewis, A. C., Rickard, A. R. & Hamilton, J. F., 8 Feb 2021, In: Atmospheric Chemistry and Physics. 21, 3, p. 1613-1625 13 p.

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• Observations of speciated isoprene nitrates in Beijing: Implications for isoprene chemistry

  Reeves, C. E., Mills, G. P., Whalley, L. K., Joe, W., Bloss, W. J., Crilley, L. R., Grimmond, S., Heard, D. E., Nicholas Hewitt, C., Hopkins, J. R., Kotthaus, S., Kramer, L. J., Jones, R. L., Lee, J. D., Liu, Y., Ouyang, B., Slater, E., Squires, F., Wang, X., Woodward-Massey, R., & 1 othersYe, C., 27 Apr 2021, In: Atmospheric Chemistry and Physics. 21, 8, p. 6315-6330 16 p.

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• Ozone production and precursor emission from wildfires in Africa

  Lee, J. D., Squires, F. A., Sherwen, T., Wilde, S. E., Cliff, S. J., Carpenter, L. J., Hopkins, J. R., Bauguitte, S. J., Reed, C., Barker, P., Allen, G., Bannan, T. J., Matthews, E., Mehra, A., Percival, C., Heard, D. E., Whalley, L. K., Ronnie, G. V., Seldon, S., Ingham, T., & 4 othersKeller, C. A., Knowland, K. E., Nisbet, E. G. & Andrews, S., 23 Sep 2021, In: Environmental Science: Atmospheres . 1, 7, p. 524-542 19 p.

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• Using highly time-resolved online mass spectrometry to examine biogenic and anthropogenic contributions to organic aerosol in Beijing

  Mehra, A., Canagaratna, M., Bannan, T. J., Worrall, S. D., Bacak, A., Priestley, M., Liu, D., Zhao, J., Xu, W., Sun, Y., Hamilton, J. F., Squires, F. A., Lee, J., Bryant, D. J., Hopkins, J. R., Elzein, A., Budisulistiorini, S. H., Cheng, X., Chen, Q., Wang, Y., & 17 othersWang, L., Stark, H., Krechmer, J. E., Brean, J., Slater, E., Whalley, L., Heard, D., Ouyang, B., Acton, W. J. F., Hewitt, C. N., Wang, X., Fu, P., Jayne, J., Worsnop, D., Allan, J., Percival, C. & Coe, H., 1 Mar 2021, In: FARADAY DISCUSSIONS. 226, p. 382-408 27 p.

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• 2020

  Elevated levels of OH observed in haze events during wintertime in central Beijing

  Slater, E. J., Whalley, L. K., Woodward-Massey, R., Ye, C., Lee, J. D., Squires, F., Hopkins, J. R., Dunmore, R. E., Shaw, M., Hamilton, J. F., Lewis, A. R., Crilley, L. R., Kramer, L., Bloss, W., Vu, T., Sun, Y., Xu, W., Yue, S., Ren, L., Joe, W., & 4 othersNicholas Hewitt, C., Wang, X., Fu, P. & Heard, D. E., 2 Dec 2020, In: Atmospheric Chemistry and Physics. 20, 23, p. 14847-14871 25 p.

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• Measurements of traffic-dominated pollutant emissions in a Chinese megacity

  Squires, F. A., Nemitz, E., Langford, B., Wild, O., Drysdale, W. S., Joe, W., Fu, P., Sue, C., Hamilton, J. F., Nicholas Hewitt, C., Hollaway, M., Kotthaus, S., Lee, J., Metzger, S., Pingintha-Durden, N., Shaw, M., Vaughan, A. R., Wang, X., Wu, R., Zhang, Q., & 1 othersZhang, Y., 23 Jul 2020, In: Atmospheric Chemistry and Physics. 20, 14, p. 8737-8761 25 p.

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• Street-scale air quality modelling for Beijing during a winter 2016 measurement campaign

  Biggart, M., Stocker, J., Doherty, R. M., Wild, O., Hollaway, M., Carruthers, D., Li, J., Zhang, Q., Wu, R., Kotthaus, S., Grimmond, S., Squires, F. A., Lee, J. & Shi, Z., 5 Mar 2020, In: Atmospheric Chemistry and Physics. 20, 5, p. 2755-2780 26 p.

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• Strong anthropogenic control of secondary organic aerosol formation from isoprene in Beijing

  Bryant, D., Dixon, W., Hopkins, J. R., Dunmore, R. E., Pereira, K. L., Shaw, M. D., Squires, F., Bannan, T. J., Mehra, A., Worrall, S. D., Bacak, A., Coe, H., Percival, C. J., Whalley, L. K., Heard, D. E., Slater, E., Ouyang, B., Cui, T., Surratt, J. D., Liu, D., & 8 othersShi, Z., Harrison, R. M., Sun, Y., Xu, W., Lewis, A., Lee, J. D., Rickard, A. R. & Hamilton, J., 30 Jun 2020, In: Atmospheric Chemistry and Physics. 20, 12, p. 7531–7552 22 p.

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• Surface-atmosphere fluxes of volatile organic compounds in Beijing

  Acton, W. J. F., Huang, Z., Davison, B., Drysdale, W. S., Fu, P., Hollaway, M., Langford, B., Lee, J., Liu, Y., Metzger, S., Mullinger, N., Nemitz, E., Reeves, C. E., Squires, F. A., Vaughan, A. R., Wang, X., Wang, Z., Wild, O., Zhang, Q., Zhang, Y., & 1 othersNicholas Hewitt, C., 7 Dec 2020, In: Atmospheric Chemistry and Physics. 20, 23, p. 15101-15125 25 p.

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• 2019

  An improved low-power measurement of ambient NO ₂ and O ₃ combining electrochemical sensor clusters and machine learning

  Smith, K. R., Edwards, P. M., Ivatt, P. D., Lee, J. D., Squires, F., Dai, C., Peltier, R. E., Evans, M. J., Sun, Y. & Lewis, A. C., 28 Feb 2019, In: Atmospheric Measurement Techniques. 12, 2, p. 1325-1336 12 p.

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• Contrasting physical properties of black carbon in urban Beijing between winter and summer

  Liu, D., Joshi, R., Wang, J., Yu, C., Allan, J. D., Coe, H., Flynn, M. J., Xie, C., Lee, J., Squires, F., Kotthaus, S., Grimmond, S., Ge, X., Sun, Y. & Fu, P., 21 May 2019, In: Atmospheric Chemistry and Physics. 19, 10, p. 6749-6769 21 p.

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• Observations of highly oxidized molecules and particle nucleation in the atmosphere of Beijing

  Brean, J., Harrison, R. M., Shi, Z., Beddows, D. C. S., Acton, W. J. F., Nicholas Hewitt, C., Squires, F. A. & Lee, J., 10 Dec 2019, In: Atmospheric Chemistry and Physics. 19, 23, p. 14933-14947 15 p.

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• Role of Ammonia on the Feedback Between AWC and Inorganic Aerosol Formation During Heavy Pollution in the North China Plain

  Ge, B., Xu, X., Ma, Z., Pan, X., Wang, Z., Lin, W., Ouyang, B., Xu, D., Lee, J., Zheng, M., Ji, D., Sun, Y., Dong, H., Squires, F. A., Fu, P. & Wang, Z., Sep 2019, In: Earth and Space Science. 6, 9, p. 1675-1693 19 p.

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• Strong anthropogenic control of secondary organic aerosol formation from isoprene in Beijing [discussion paper]

  Bryant, D., Dixon, W., Hopkins, J. R., Dunmore, R. E., Pereira, K. L., Shaw, M., Squires, F., Bannan, T. J., Mehra, A., Worrall, S. D., Bacak, A., Coe, H., Percival, C. J., Whalley, L. K., Heard, D. E., Slater, E., Ouyang, B., Cui, T., Surratt, J. D., Liu, D., & 8 othersShi, Z., Harrison, R. M., Sun, Y., Xu, W., Lewis, A., Lee, J. D., Rickard, A. R. & Hamilton, J., 23 Oct 2019, In: Atmospheric Chemistry and Physics Discussions.

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• 2017

  Clustering approaches to improve the performance of low cost air pollution sensors

  Smith, K. R., Edwards, P. M., Evans, M. J., Lee, J. D., Shaw, M. D., Squires, F., Wilde, S. & Lewis, A. C., 9 Feb 2017, (E-pub ahead of print) In: FARADAY DISCUSSIONS. 200, p. 621-637 17 p.

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