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Yusuf Hamied Department of Chemistry

 

University Lecturer

Environmental and climatic effects of volcanic gases and aerosols

I am an Interdisciplinary Lecturer in Climate Modelling jointly affiliated with the Departments of Chemistry and Geography. I combine expertise in atmospheric science, climate modelling, and volcanology to advance the current understanding of volcanic impacts and hazards. In particular, I investigate the impact of volcanism on atmospheric chemistry, climate, air quality, human health, ecosystems and aviation using a wide range of atmospheric models and volcanological datasets. I am particularly interested in continuously degassing volcanoes and effusive Icelandic volcanic eruptions and their effects on air quality and climate. I am convinced that these eruptions serve as a perfect natural lab and can help better understand and quantify aerosol-cloud interactions.

Recent research

I have extensively studied the most recent Icelandic eruption at Holuhraun (Bárðarbunga volcano). Starting in August 2014, Holuhraun erupted effusively for 6 months and emitted up to nine times as much sulphur dioxide per day as all European industry combined, which led to a measureable episodic degradation of air quality across Northern Europe in September 2014 (see Schmidt et al., 2015). Combining satellite observations with numerical modelling, we were also able to demonstrate that the eruption had a discernable effect on the brightness of low-level clouds over the North Atlantic (Gettelman et al., 2015; Malavelle et al., 2017).

Publications

Machine learning reveals climate forcing from aerosols is dominated by increased cloud cover (vol 15, pg 609, 2022)
Y Chen, J Haywood, Y Wang, F Malavelle, G Jordan, D Partridge, J Fieldsend, J De Leeuw, A Schmidt, N Cho, L Oreopoulos, S Platnick, D Grosvenor, P Field, U Lohmann
– Nature Geoscience
(2022)
15,
854
Machine learning reveals climate forcing from aerosols is dominated by increased cloud cover
Y Chen, J Haywood, Y Wang, F Malavelle, G Jordan, D Partridge, J Fieldsend, J De Leeuw, A Schmidt, N Cho, L Oreopoulos, S Platnick, D Grosvenor, P Field, U Lohmann
– Nature Geoscience
(2022)
15,
609
Reckoning with the Rocky Relationship Between Eruption Size and Climate Response: Toward a Volcano-Climate Index
A Schmidt, BA Black
(2022)
50,
627
Impact of climate change on volcanic processes: current understanding and future challenges
TJ Aubry, JI Farquharson, CR Rowell, SFL Watt, V Pinel, F Beckett, J Fasullo, PO Hopcroft, DM Pyle, A Schmidt, JS Sykes
– Bulletin of Volcanology
(2022)
84,
58
Volcanic effects on climate: recent advances and future avenues
LR Marshall, EC Maters, A Schmidt, C Timmreck, A Robock, M Toohey
– Bulletin of Volcanology
(2022)
84,
54
Impacts of erupted and resuspended volcanic ash from the 2010 Eyjafjallajökull eruption, Iceland, on atmospheric ice-nucleating particle concentrations
E Maters, J de Leeuw, F Beckett, A Sanchez-Marroquin, C Witham, B Murray, K Carslaw, A Schmidt
(2022)
Effects of forcing differences and initial conditions on inter-model agreement in the VolMIP volc-pinatubo-full experiment
D Zanchettin, C Timmreck, M Khodri, A Schmidt, M Toohey, M Abe, S Bekki, J Cole, SW Fang, W Feng, G Hegerl, B Johnson, N Lebas, AN Legrande, GW Mann, L Marshall, L Rieger, A Robock, S Rubinetti, K Tsigaridis, H Weierbach
– Geoscientific Model Development
(2022)
15,
2265
The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions
MJ Osborne, J De Leeuw, C Witham, A Schmidt, F Beckett, N Kristiansen, J Buxmann, C Saint, EJ Welton, J Fochesatto, AR Gomes, U Bundke, A Petzold, F Marenco, J Haywood
– Atmospheric Chemistry and Physics
(2022)
22,
2975
Assessing the effectiveness of low-cost air quality monitors for identifying volcanic SO2 and PM downwind from Masaya volcano, Nicaragua
RCW Whitty, MA Pfeffer, E Ilyinskaya, TJ Roberts, A Schmidt, S Barsotti, W Strauch, LR Crilley, FD Pope, H Bellanger, E Mendoza, TA Mather, EJ Liu, N Peters, IA Taylor, H Francis, XH Leiva, D Lynch, S Nobert, P Baxter
– Volcanica
(2022)
5,
33
Opportunistic experiments to constrain aerosol effective radiative forcing
MW Christensen, A Gettelman, J Cermak, G Dagan, M Diamond, A Douglas, G Feingold, F Glassmeier, T Goren, DP Grosvenor, E Gryspeerdt, R Kahn, Z Li, P-L Ma, F Malavelle, IL McCoy, DT McCoy, G McFarquhar, J Mülmenstädt, S Pal, A Possner, A Povey, J Quaas, D Rosenfeld, A Schmidt, R Schrödner, A Sorooshian, P Stier, V Toll, D Watson-Parris, R Wood, M Yang, T Yuan
– Atmospheric Chemistry and Physics
(2022)
22,
641
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Research Group

Research Interest Group

Telephone number

01223 336369

Email address

as2737@cam.ac.uk