Articles | Volume 14, issue 12
https://doi.org/10.5194/amt-14-7893-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-14-7893-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
PARAFOG v2.0: a near-real-time decision tool to support nowcasting fog formation events at local scales
Jean-François Ribaud
CORRESPONDING AUTHOR
Laboratoire de Météorologie Dynamique, Ecole Polytechnique,
91128 Palaiseau, France
Martial Haeffelin
Institut Pierre Simon Laplace, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau, France
Jean-Charles Dupont
Institut Pierre Simon Laplace, Université Versailles Saint
Quentin-en-Yvelines, 78280 Guyancourt, France
Marc-Antoine Drouin
Laboratoire de Météorologie Dynamique, Ecole Polytechnique,
Centre National de la Recherche Scientifique, 91128 Palaiseau, France
Felipe Toledo
Laboratoire de Météorologie Dynamique, Ecole Polytechnique,
91128 Palaiseau, France
Simone Kotthaus
Institut Pierre Simon Laplace, Ecole Polytechnique, Centre National de la Recherche Scientifique, 91128 Palaiseau, France
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Jinghui Lian, François-Marie Bréon, Grégoire Broquet, Thomas Lauvaux, Bo Zheng, Michel Ramonet, Irène Xueref-Remy, Simone Kotthaus, Martial Haeffelin, and Philippe Ciais
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Claire E. Reeves, Graham P. Mills, Lisa K. Whalley, W. Joe F. Acton, William J. Bloss, Leigh R. Crilley, Sue Grimmond, Dwayne E. Heard, C. Nicholas Hewitt, James R. Hopkins, Simone Kotthaus, Louisa J. Kramer, Roderic L. Jones, James D. Lee, Yanhui Liu, Bin Ouyang, Eloise Slater, Freya Squires, Xinming Wang, Robert Woodward-Massey, and Chunxiang Ye
Atmos. Chem. Phys., 21, 6315–6330, https://doi.org/10.5194/acp-21-6315-2021, https://doi.org/10.5194/acp-21-6315-2021, 2021
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The impact of isoprene on atmospheric chemistry is dependent on how its oxidation products interact with other pollutants, specifically nitrogen oxides. Such interactions can lead to isoprene nitrates. We made measurements of the concentrations of individual isoprene nitrate isomers in Beijing and used a model to test current understanding of their chemistry. We highlight areas of uncertainty in understanding, in particular the chemistry following oxidation of isoprene by the nitrate radical.
Wenhua Wang, Longyi Shao, Claudio Mazzoleni, Yaowei Li, Simone Kotthaus, Sue Grimmond, Janarjan Bhandari, Jiaoping Xing, Xiaolei Feng, Mengyuan Zhang, and Zongbo Shi
Atmos. Chem. Phys., 21, 5301–5314, https://doi.org/10.5194/acp-21-5301-2021, https://doi.org/10.5194/acp-21-5301-2021, 2021
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We compared the characteristics of individual particles at ground level and above the mixed-layer height. We found that the particles above the mixed-layer height during haze periods are more aged compared to ground level. More coal-combustion-related primary organic particles were found above the mixed-layer height. We suggest that the particles above the mixed-layer height are affected by the surrounding areas, and once mixed down to the ground, they might contribute to ground air pollution.
Roland Stirnberg, Jan Cermak, Simone Kotthaus, Martial Haeffelin, Hendrik Andersen, Julia Fuchs, Miae Kim, Jean-Eudes Petit, and Olivier Favez
Atmos. Chem. Phys., 21, 3919–3948, https://doi.org/10.5194/acp-21-3919-2021, https://doi.org/10.5194/acp-21-3919-2021, 2021
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Air pollution endangers human health and poses a problem particularly in densely populated areas. Here, an explainable machine learning approach is used to analyse periods of high particle concentrations for a suburban site southwest of Paris to better understand its atmospheric drivers. Air pollution is particularly excaberated by low temperatures and low mixed layer heights, but processes vary substantially between and within seasons.
Lisa K. Whalley, Eloise J. Slater, Robert Woodward-Massey, Chunxiang Ye, James D. Lee, Freya Squires, James R. Hopkins, Rachel E. Dunmore, Marvin Shaw, Jacqueline F. Hamilton, Alastair C. Lewis, Archit Mehra, Stephen D. Worrall, Asan Bacak, Thomas J. Bannan, Hugh Coe, Carl J. Percival, Bin Ouyang, Roderic L. Jones, Leigh R. Crilley, Louisa J. Kramer, William J. Bloss, Tuan Vu, Simone Kotthaus, Sue Grimmond, Yele Sun, Weiqi Xu, Siyao Yue, Lujie Ren, W. Joe F. Acton, C. Nicholas Hewitt, Xinming Wang, Pingqing Fu, and Dwayne E. Heard
Atmos. Chem. Phys., 21, 2125–2147, https://doi.org/10.5194/acp-21-2125-2021, https://doi.org/10.5194/acp-21-2125-2021, 2021
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To understand how emission controls will impact ozone, an understanding of the sources and sinks of OH and the chemical cycling between peroxy radicals is needed. This paper presents measurements of OH, HO2 and total RO2 taken in central Beijing. The radical observations are compared to a detailed chemistry model, which shows that under low NO conditions, there is a missing OH source. Under high NOx conditions, the model under-predicts RO2 and impacts our ability to model ozone.
Rutambhara Joshi, Dantong Liu, Eiko Nemitz, Ben Langford, Neil Mullinger, Freya Squires, James Lee, Yunfei Wu, Xiaole Pan, Pingqing Fu, Simone Kotthaus, Sue Grimmond, Qiang Zhang, Ruili Wu, Oliver Wild, Michael Flynn, Hugh Coe, and James Allan
Atmos. Chem. Phys., 21, 147–162, https://doi.org/10.5194/acp-21-147-2021, https://doi.org/10.5194/acp-21-147-2021, 2021
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Black carbon (BC) is a component of particulate matter which has significant effects on climate and human health. Sources of BC include biomass burning, transport, industry and domestic cooking and heating. In this study, we measured BC emissions in Beijing, finding a dominance of traffic emissions over all other sources. The quantitative method presented here has benefits for revising widely used emissions inventories and for understanding BC sources with impacts on air quality and climate.
Felipe Toledo, Julien Delanoë, Martial Haeffelin, Jean-Charles Dupont, Susana Jorquera, and Christophe Le Gac
Atmos. Meas. Tech., 13, 6853–6875, https://doi.org/10.5194/amt-13-6853-2020, https://doi.org/10.5194/amt-13-6853-2020, 2020
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Cloud observations are essential to rainfall, fog and climate change forecasts. One key instrument for these observations is cloud radar. Yet, discrepancies are found when comparing radars from different ground stations or satellites. Our work presents a calibration methodology for cloud radars based on reference targets, including an analysis of the uncertainty sources. The method enables the calibration of reference instruments to improve the quality and value of the cloud radar network data.
Cited articles
Bergot, T.: Large-eddy simulation study of the dissipation of radiation fog,
Q. J. Roy. Meteor. Soc., 142, 1029–1040,
https://doi.org/10.1002/qj.2706, 2016.
Bergot, T., Carrer, D., Noilhan, J., and Bougeault, P.: Improved Site-Specific Numerical Prediction of Fog and Low Clouds: A Feasibility Study, Weather Forecast., 20, 627–646, https://doi.org/10.1175/WAF873.1, 2005.
Cermak, J. and Bendix, J.: A novel approach to fog/low stratus detection using Meteosat 8 data, Atmos. Res., 87, 279–292,
https://doi.org/10.1016/j.atmosres.2007.11.009, 2008.
Cermak, J. and Bendix, J.: Detecting ground fog from space – A
microphysics-based approach, Int. J. Remote Sens., 32, 3345–3371,
https://doi.org/10.1080/01431161003747505, 2011.
Dietz, S. J., Kneringer, P., Mayr, G. J., and Zeileis, A.: Forecasting
Low-Visibility Procedure States with Tree-Based Statistical Methods, Pure Appl. Geophys., 176, 2631–2644, https://doi.org/10.1007/s00024-018-1914-x, 2019.
Dupont, J., Haeffelin, M., Protat, A., Bouniol, D., Boyouk, N., and Morille, Y.: Stratus–Fog Formation and Dissipation: A 6-Day Case Study, Bound.-Lay. Meteorol., 143, 207–225,
https://doi.org/10.1007/s10546-012-9699-4, 2012.
Dupont, J. C., Haeffelin, M., Stolaki, S., and Elias, T.: Analysis of
dynamical and thermal processes driving fog and quasi-fog life cycles using
the 2010–2013 ParisFog dataset, Pure Appl. Geophys., 173, 1337–1358, 2016.
Egli, S., Thies, B., Drönner, J., Cermak, J., and Bendix, J.: A 10 year
fog and low stratus climatology for Europe based on Meteosat Second Generation data, Q. J. Roy. Meteor. Soc., 143, 530–541, https://doi.org/10.1002/qj.2941, 2017.
Egli, S., Thies, B., and Bendix, J. A: Hybrid Approach for Fog Retrieval Based on a Combination of Satellite and Ground Truth Data, Remote Sens., 10, 628, https://doi.org/10.3390/rs10040628, 2018.
Elias, T., Haeffelin, M., Drobinski, P., Gomes, L., Rangognio, J., Bergot,
T., Chazette, P., Raut, J.-C., and Colomb, M.: Particulate contribution to
extinction of visible radiation: pollution, haze, and fog, Atmos. Res., 92,
443–454, https://doi.org/10.1016/j.atmosres.2009.01.006, 2009.
Gandhidasan, P. and Abualhamayel, H. I.: Fog collection as a source of fresh
water supply in the Kingdom of Saudi Arabia, Water Environ. J.,
21, 19–25, https://doi.org/10.1111/j.1747-6593.2006.00041.x, 2007.
Gultepe, I., Tardif, R., Michaelides, S. C., Cermak, J., Bott, A., Bendix,
J., Müller, M. D., Pagowski, M., Hansen, B., Ellrod, G., Jacobs, W.,
Toth, G., and Cober, S. G.: Fog research: a review of past achievements and
future perspectives, Pure Appl. Geophys., 164, 1121–1159,
https://doi.org/10.1007/s00024-007-0211-x, 2007.
Gultepe, I., Pearson, G., Milbrandt, J. A., Hansen, B., Platnick, S., Taylor, P., Gordon, M., Oakley, J. P., and Cober, S. G.: The Fog Remote Sensing and Modelling Field Project, Bull. Amer. Meteor. Soc., 90, 341–360, https://doi.org/10.1175/2008BAMS2354.1, 2009.
Gultepe, I., Sharman, R., Williams, P. D., Zhou, B., Ellrod, G., Minnis, P., Trier, S., Griffin, S., Yum, S. S., Gharabaghi, B., Feltz, W., Temimi, M., Zhaoxia, P., Storer, L. N., Kneringer, P., Weston, M. J., Chuang, H., Thobois, L., Dimri, A. P., Dietz, S. J., França, G. B., Almeida, M. V., and Albquerque Neto, F. L.: A Review of High Impact Weather
for Aviation Meteorology, Pure Appl. Geophys., 176, 1869–1921, https://doi.org/10.1007/s00024-019-02168-6, 2019.
Haeffelin, M., Barthès, L., Bock, O., Boitel, C., Bony, S., Bouniol, D., Chepfer, H., Chiriaco, M., Cuesta, J., Delanoë, J., Drobinski, P., Dufresne, J.-L., Flamant, C., Grall, M., Hodzic, A., Hourdin, F., Lapouge, F., Lemaître, Y., Mathieu, A., Morille, Y., Naud, C., Noël, V., O'Hirok, W., Pelon, J., Pietras, C., Protat, A., Romand, B., Scialom, G., and Vautard, R.: SIRTA, a ground-based atmospheric observatory for cloud and aerosol research, Ann. Geophys., 23, 253–275, https://doi.org/10.5194/angeo-23-253-2005, 2005.
Haeffelin, M., Bergot, T., Elias, T., Tardif, R., Carrer, D., Chazette, P.,
Colomb, M., Drobinski, P., Dupont, E., Dupont, J.-C., Gomes, L.,
Musson-Genon, L., Pietras, C., Plana-Fattori, A., Protat, A., Rangognio, J.,
Raut, J.-C., Rémy, S., Richard, D., Sciare, J., and Zhang, X.: PARISFOG:
Shedding New Light on Fog Physical Processes, B. Am. Meteorol. Soc., 91,
767–783, 2010.
Haeffelin, M., Laffineur, Q., Bravo-Aranda, J.-A., Drouin, M.-A., Casquero-Vera, J.-A., Dupont, J.-C., and De Backer, H.: Radiation fog formation alerts using attenuated backscatter power from automatic lidars and ceilometers, Atmos. Meas. Tech., 9, 5347–5365, https://doi.org/10.5194/amt-9-5347-2016, 2016.
Kneringer, P., Dietz, S. J., Mayr, G. J., and Zeileis, A.: Probabilistic
Nowcasting of Low-Visibility Procedure States at Vienna International
Airport During Cold Season, Pure Appl. Geophys., 176, 2165–2177, https://doi.org/10.1007/s00024-018-1863-4, 2019.
Kotthaus, S., O'Connor, E., Münkel, C., Charlton-Perez, C., Haeffelin, M., Gabey, A. M., and Grimmond, C. S. B.: Recommendations for processing atmospheric attenuated backscatter profiles from Vaisala CL31 ceilometers, Atmos. Meas. Tech., 9, 3769–3791, https://doi.org/10.5194/amt-9-3769-2016, 2016.
Mazoyer, M., Lac, C., Thouron, O., Bergot, T., Masson, V., and Musson-Genon, L.: Large eddy simulation of radiation fog: impact of dynamics on the fog life cycle, Atmos. Chem. Phys., 17, 13017–13035, https://doi.org/10.5194/acp-17-13017-2017, 2017.
Mendel, J.: Fuzzy logic systems for engineering: a tutorial, P. IEEE, 83, 345–377, https://doi.org/10.1109/5.364485, 1995.
Menut, L., Mailler, S., Dupont, J. C., Haeffelin, M., and Elias, T.: Predictability of the meteorological conditions favourable to radiative fog formation during the 2011 Parisfog campaign, Bound.-Lay. Meteorol., 150, 277–297, 2014.
Philip, A., Bergot, T., Bouteloup, Y., and Bouyssel, F.: The Impact of
Vertical Resolution on Fog Forecasting in the Kilometric-Scale Model AROME:
A Case Study and Statistics, Weather Forecast., 31, 1655–1671,
https://doi.org/10.1175/WAF-D-16-0074.1, 2016.
Román-Cascón, C., Steeneveld, G., Yagüe, C., Sastre, M.,
Arrillaga, J., and Maqueda, G.: Forecasting radiation fog at climatologically
contrasting sites: evaluation of statistical methods and WRF, Q. J. Roy. Meteor. Soc., 142, 1048–1063,
https://doi.org/10.1002/qj.2708, 2016.
Steeneveld, G. J., Ronda, R. J., and Holtslag, A. A. M.: The challenge of
forecasting the onset and development of radiation fog using mesoscale
atmospheric models, Bound.-Lay. Meteorol., 154, 265–289, https://doi.org/10.1007/s10546-014-9973-8, 2015.
Tardif, R. and Rasmussen, R. M.: Event-based climatology and typology of fog
in the New York City region, J. Appl. Meteorol. Clim.,
46, 1141–1168, https://doi.org/10.1175/JAM2516.1, 2007.
Toledo, F., Haeffelin, M., Wærsted, E., and Dupont, J.-C.: A new conceptual model for adiabatic fog, Atmos. Chem. Phys., 21, 13099–13117, https://doi.org/10.5194/acp-21-13099-2021, 2021.
Wærsted, E. G., Haeffelin, M., Steeneveld, G.-J., and Dupont, J.-C.: Understanding the
dissipation of continental fog by analysing the LWP budget using idealized
LES and in situ observations, Q. J. Roy. Meteor. Soc., 145, 784–804,
https://doi.org/10.1002/qj.3465, 2019.
World Meteorological Organization: Cloud Atlas, available at:
https://cloudatlas.wmo.int/en/fog-compared-with-mist.html,
last access: 9 December 2021.
Short summary
PARAFOG is a near-real-time decision tool that aims to retrieve pre-fog alert levels minutes to hours prior to fog onset. The second version of PARAFOG allows us to discriminate between radiation and stratus lowering fog situations. It is based upon the combination of visibility observations and automatic lidar and ceilometer measurements. The overall performance of the second version of PARAFOG over more than 300 fog cases at five different locations presents a good perfomance.
PARAFOG is a near-real-time decision tool that aims to retrieve pre-fog alert levels minutes to...