Ananth Ranjithkumar
Polar Atmospheric Modeler STEM A
Biography
I have a background in Climate modelling and Chemical Engineering.
I am currently in the final stages of my PhD in Climate Modelling at the University of Leeds. The focus of my PhD research is to assess the impact of aerosol particles and cloud droplets on global climate.
I also have a Bachelors in Chemical Engineering from the Indian Institute of Technology Madras, and a masters in Chemical Engineering from TU Delft, where I gained experience designing air quality monitoring instruments.
Research interests
The particular focus of my research work is to develop new parameterisations of sea salt aerosol production from blowing snow, and its climate impact acting as cloud condensation nuclei (CCN) and ice nucleating particle (INP). In particular, we aim to improve the emission scheme above sea ice as a function of i) atmospheric state and ii) sea ice/snow properties. To do this we will use advanced statistical and/or machine learning techniques to explore the underlying processes and the dependence of cloud phase on aerosol properties, atmospheric state parameters, and sea ice. We will test improved model representations of polar aerosols and clouds in a global climate model UKESM to assess associated climate impacts.
Ranjithkumar A, Gordon H, Williamson C, Rollins A, Pringle K, Kupc A, Abraham NL, Brock C, Carslaw K. 2021. Constraints on global aerosol number concentration, SO₂ and condensation sink in UKESM1 using ATom measurements. Atmospheric Chemistry and Physics. 21(6), pp. 4979-5014
Lamkaddam H, Dommen J, Ranjithkumar A, Gordon H, Wehrle G, Krechmer J, Majluf F, Salionov D, Schmale J, Bjelić S, Carslaw KS, El Haddad I, Baltensperger U. 2021. Large contribution to secondary organic aerosol from isoprene cloud chemistry. Science Advances. 7(13)
Chu B, Dias A, Ding A, Dommen J, Duplissy J, El Haddad I, Gonzalez Carracedo L, Granzin M, Hansel A, Heinritzi M, Hofbauer V, Junninen H, Kangasluoma J, Kemppainen D, Kim C, Kong W, Krechmer JE, Kvashin A, Laitinen T, Lamkaddam H, Lee CP, Lehtipalo K, Leiminger M, Li Z, Makhmutov V, Manninen HE, Marie G, Marten R, Mathot S, Mauldin RL, Mentler B, Möhler O, Müller T, Nie W, Onnela A, Petäjä T, Pfeifer J, Philippov M, Ranjithkumar A, Saiz-Lopez A, Salma I, Scholz W, Schuchmann S, Schulze B, Steiner G, Stozhkov Y, Tauber C, Tomé A, Thakur RC, Väisänen O, Vazquez-Pufleau M, Wagner AC, Wang Y, Weber SK, Winkler PM, Wu Y, Xiao M, Yan C, Ye Q, Ylisirniö A, Zauner-Wieczorek M, Zha Q, Zhou P, Flagan RC, Curtius J, Baltensperger U, Kulmala M, Kerminen V-M, Kurtén T, Donahue NM, He X-C, Tham YJ, Dada L, Wang M, Finkenzeller H, Stolzenburg D, Iyer S, Simon M, Kürten A, Shen J, Rörup B, Rissanen M, Schobesberger S, Baalbaki R, Wang DS, Koenig TK, Jokinen T, Sarnela N, Beck LJ, Almeida J, Amanatidis S, Amorim A, Ataei F, Baccarini A, Bertozzi B, Bianchi F, Brilke S, Caudillo L, Chen D, Chiu R, and 5 other authors. 2021. Role of iodine oxoacids in atmospheric aerosol nucleation. Science. 371(6529), pp. 589-595
Simon M, Dada L, Heinritzi M, Scholz W, Stolzenburg D, Fischer L, Wagner AC, Kürten A, Rörup B, He X-C, Almeida J, Baalbaki R, Baccarini A, Bauer PS, Beck L, Bergen A, Bianchi F, Bräkling S, Brilke S, Caudillo L, Chen D, Chu B, Dias A, Draper DC, Duplissy J, El-Haddad I, Finkenzeller H, Frege C, Gonzalez-Carracedo L, Gordon H, Granzin M, Hakala J, Hofbauer V, Hoyle CR, Kim C, Kong W, Lamkaddam H, Lee CP, Lehtipalo K, Leiminger M, Mai H, Manninen HE, Marie G, Marten R, Mentler B, Molteni U, Nichman L, Nie W, Ojdanic A, Onnela A, Partoll E, Petäjä T, Pfeifer J, Philippov M, Quéléver LLJ, Ranjithkumar A, Rissanen MP, Schallhart S, Schobesberger S, Schuchmann S, Shen J, Sipilä M, Steiner G, Stozhkov Y, Tauber C, Tham YJ, Tomé AR, Vazquez-Pufleau M, Vogel AL, Wagner R, Wang M, Wang DS, Wang Y, Weber SK, Wu Y, Xiao M, Yan C, Ye P, Ye Q, Zauner-Wieczorek M, Zhou X, Baltensperger U, Dommen J, Flagan RC, Hansel A, Kulmala M, Volkamer R, Winkler PM, Worsnop DR, Donahue NM, Kirkby J, Curtius J. 2020. Molecular understanding of new-particle formation from α-pinene between −50 and +25 °C. Atmospheric Chemistry and Physics. 20(15), pp. 9183-9207
Stolzenburg D, Simon M, Ranjithkumar A, Kürten A, Lehtipalo K, Gordon H, Ehrhart S, Finkenzeller H, Pichelstorfer L, Nieminen T, He X-C, Brilke S, Xiao M, Amorim A, Baalbaki R, Baccarini A, Beck L, Bräkling S, Caudillo Murillo L, Chen D, Chu B, Dada L, Dias A, Dommen J, Duplissy J, El Haddad I, Fischer L, Gonzalez Carracedo L, Heinritzi M, Kim C, Koenig TK, Kong W, Lamkaddam H, Lee CP, Leiminger M, Li Z, Makhmutov V, Manninen HE, Marie G, Marten R, Müller T, Nie W, Partoll E, Petäjä T, Pfeifer J, Philippov M, Rissanen MP, Rörup B, Schobesberger S, Schuchmann S, Shen J, Sipilä M, Steiner G, Stozhkov Y, Tauber C, Tham YJ, Tomé A, Vazquez-Pufleau M, Wagner AC, Wang M, Wang Y, Weber SK, Wimmer D, Wlasits PJ, Wu Y, Ye Q, Zauner-Wieczorek M, Baltensperger U, Carslaw KS, Curtius J, Donahue NM, Flagan RC, Hansel A, Kulmala M, Lelieveld J, Volkamer R, Kirkby J, Winkler PM. 2020. Enhanced growth rate of atmospheric particles from sulfuric acid. Atmospheric Chemistry and Physics. 20(12), pp. 7359-7372
Wang M, Kong W, Marten R, He X-C, Chen D, Pfeifer J, Heitto A, Kontkanen J, Dada L, Kürten A, Yli-Juuti T, Manninen HE, Amanatidis S, Amorim A, Baalbaki R, Baccarini A, Bell DM, Bertozzi B, Bräkling S, Brilke S, Murillo LC, Chiu R, Chu B, De Menezes L-P, Duplissy J, Finkenzeller H, Carracedo LG, Granzin M, Guida R, Hansel A, Hofbauer V, Krechmer J, Lehtipalo K, Lamkaddam H, Lampimäki M, Lee CP, Makhmutov V, Marie G, Mathot S, Mauldin RL, Mentler B, Müller T, Onnela A, Partoll E, Petäjä T, Philippov M, Pospisilova V, Ranjithkumar A, Rissanen M, Rörup B, Scholz W, Shen J, Simon M, Sipilä M, Steiner G, Stolzenburg D, Tham YJ, Tomé A, Wagner AC, Wang DS, Wang Y, Weber SK, Winkler PM, Wlasits PJ, Wu Y, Xiao M, Ye Q, Zauner-Wieczorek M, Zhou X, Volkamer R, Riipinen I, Dommen J, Curtius J, Baltensperger U, Kulmala M, Worsnop DR, Kirkby J, Seinfeld JH, El-Haddad I, Flagan RC, Donahue NM. 2020. Rapid growth of new atmospheric particles by nitric acid and ammonia condensation. Nature. 581(7807), pp. 184-189
Barmpounis K, Ranjithkumar A, Schmidt-Ott A, Attoui M, Biskos G. 2018. Enhancing the detection efficiency of condensation particle counters for sub-2 nm particles. Journal of Aerosol Science. 117, pp. 44-53
Publications from NERC Open Research Archive
2023
Gong, Xianda, Zhang, Jiaoshi, Croft, Betty, Yang, Xin ORCID record for Xin Yang, Frey, Markus M. ORCID record for Markus M. Frey, Bergner, Nora, Chang, Rachel Y.-W., Creamean, Jessie M., Kuang, Chongai, Martin, Randall V., Ranjithkumar, Ananth, Sedlacek, Arthur J., Uin, Janek, Willmes, Sascha, Zawadowicz, Maria A., Pierce, Jeffrey R., Shupe, Matthew D., Schmale, Julia, Wang, Jian. (2023) Arctic warming by abundant fine sea salt aerosols from blowing snow. Nature Geoscience. 18 pp. 10.1038/s41561-023-01254-8
Lapere, Rémy, Thomas, Jennie L., Marelle, Louis, Ekman, Annica M.L., Frey, Markus M. ORCID record for Markus M. Frey, Lund, Marianne Tronstad, Makkonen, Risto, Ranjithkumar, Ananth, Salter, Matthew E., Samset, Bjørn Hallvard, Schulz, Michael, Sogacheva, Larisa, Yang, Xin ORCID record for Xin Yang, Zieger, Paul. (2023) The representation of sea salt aerosols and their role in polar climate within CMIP6. Journal of Geophysical Research: Atmospheres, 128. 36 pp. 10.1029/2022JD038235
2023
Clouds formed with sea salt contribute to Arctic warming
News 4 September, 2023