Freya Squires

Search results

• 2025

  Data supporting the North Atlantic Climate System Integrated Study (ACSIS) programme, including atmospheric composition; oceanographic and sea-ice observations (2016-2022); and output from ocean, atmosphere, land, and sea-ice models (1950-2050)

  Archibald, A. T., Sinha, B., Russo, M. R., Matthews, E., Squires, F. A., Abraham, N. L., Bauguitte, S. J. B., Bannan, T. J., Bell, T. G., Berry, D., Carpenter, L. J., Coe, H., Coward, A., Edwards, P., Feltham, D., Heard, D., Hopkins, J., Keeble, J., Kent, E. C. & King, B. A. & 17 others, Lawrence, I. R., Lee, J., Macintosh, C. R., Megann, A., Moat, B. I., Read, K., Reed, C., Roberts, M. J., Schiemann, R., Schroeder, D., Smyth, T. J., Temple, L., Thamban, N., Whalley, L., Williams, S., Wu, H. & Yang, M., 17 Jan 2025, In: Earth System Science Data. 17, 1, p. 135-164 30 p.

  Research output: Contribution to journal › Article › peer-review

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• 2024

  The effect of different climate and air quality policies in China on in situ ozone production in Beijing

  Nelson, B. S., Liu, Z., Squires, F. A., Shaw, M., Hopkins, J. R., Hamilton, J. F., Rickard, A. R., Lewis, A. C., Shi, Z. & Lee, J. D., 20 Aug 2024, In: Atmospheric Chemistry and Physics. 24, 16, p. 9031-9044 14 p.

  Research output: Contribution to journal › Article › peer-review

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• 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.

  Research output: Contribution to journal › Article › peer-review

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• Impact of HO2 aerosol uptake on radical levels and O3 production during summertime in Beijing

  Dyson, J. E., 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., Worrall, S. D., Bacak, A., Mehra, A., Bannan, T. J., Coe, H., Percival, C. J., Ouyang, B. & Hewitt, C. N. & 18 others, Jones, R. L., Crilley, L. R., Kramer, L. J., Acton, W. J. F., Bloss, W. J., Saksakulkrai, S., Xu, J., Shi, Z., Kotthaus, S., Grimmond, S., Sun, Y., Xu, W., Yue, S., Wei, L., Fu, P., Wang, X., Arnold, S. R. & Heard, D. E., 22 May 2023, In: Atmospheric Chemistry and Physics. 23, 10, p. 5679-5697 19 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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• 2022

  Daily evolution of VOCs in Beijing: chemistry, emissions, transport, and policy implications

  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, In: Atmospheric Chemistry and Physics Discussions. 2022, p. 1-29 29 p.

  Research output: Contribution to journal › Article

  Open Access

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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.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Kramer, 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.

  Research output: Contribution to journal › Article › peer-review

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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 Sept 2021, (E-pub ahead of print) In: FARADAY DISCUSSIONS. 226, p. 223-238 16 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Cui, 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.

  Research output: Contribution to journal › Article › peer-review

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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 others, Bacak, 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.

  Research output: Contribution to journal › Article › peer-review

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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 others, Ye, C., 27 Apr 2021, In: Atmospheric Chemistry and Physics. 21, 8, p. 6315-6330 16 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Keller, C. A., Knowland, K. E., Nisbet, E. G. & Andrews, S., 23 Sept 2021, In: Environmental Science: Atmospheres . 1, 7, p. 524-542 19 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Wang, 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.

  Research output: Contribution to journal › Article › peer-review

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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 others, Nicholas Hewitt, C., Wang, X., Fu, P. & Heard, D. E., 2 Dec 2020, In: Atmospheric Chemistry and Physics. 20, 23, p. 14847-14871 25 p.

  Research output: Contribution to journal › Article › peer-review

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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 others, Zhang, Y., 23 Jul 2020, In: Atmospheric Chemistry and Physics. 20, 14, p. 8737-8761 25 p.

  Research output: Contribution to journal › Article › peer-review

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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.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Shi, 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.

  Research output: Contribution to journal › Article

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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 others, Nicholas Hewitt, C., 7 Dec 2020, In: Atmospheric Chemistry and Physics. 20, 23, p. 15101-15125 25 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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.

  Research output: Contribution to journal › Article › peer-review

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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.

  Research output: Contribution to journal › Article › peer-review

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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.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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., Sept 2019, In: Earth and Space Science. 6, 9, p. 1675-1693 19 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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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 others, Shi, 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.

  Research output: Contribution to journal › Article

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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.

  Research output: Contribution to journal › Article › peer-review

  Open Access

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