March 28, 2019

Figure: LHS: Cloud albedo of a shallow cloud scene where a ship track forms around the emission source. The ship is moving continuously through the domain from right to left. RHS: The same is shown for a different cloud scene (deeper boundary layer) where the same ship...

October 16, 2018

From November 1st, I will be starting my own research group at the Institute for Atmospheric and Environmental Science at Goethe University in Frankfurt. The program is funded by the German Federal Ministry of Education and Research ("BMBF") and managed through the Ger...

October 9, 2017

Figure 1: Floating wind turbines being transported to the first floating turbine wind farm site (Hywind project) situated off the north-east coast of Scotland (Image courtesy: Terje Aase/Shutterstock.com)

Surface climatologies of wind speeds show that wind speeds over t...

February 1, 2017

Figure: Process schematic of aerosol cloud effects in boundary layer mixed-phase clouds (See text for explanation).

In the Arctic, climate change effects are proceeding more rapidly than the rest of the world, which is commonly referred to "Arctic amplification". Due to...

May 17, 2016

Table: Ship-induced changes in the mean shortwave (SW) cloud radiative effect (CRE) at the top of atmosphere and cloud optical thickness τ. Ship simulations were run at resolutions listed, whilst in the Dil simulations merely the ship particle flux was coarse grained t...

October 2, 2015

Figure. MODIS visible image taken on Jan. 27th 2003 over the Bay of Biscay (Europe) showing ship tracks against clear sky (Courtesy: MODIS, NASA).

Many studies have shown that emmitting hygroscopic particles (i.e. water affine aerosol) into clean marine low-lying clouds...

April 2, 2014

 Figure: Sounding of potential temperature profile (dashed line) obtained at Brest on Jan 27th, 2003 at 00 UTC obtained during a pronounced high pressure synoptic situation as depicted by the underlying surface pressure maps (Courtesy: German weather service 2003). Pro...

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Featured Research

In general, my research is driven by the desire to expand our process understanding of different phenomena found within the Earth's atmosphere. In pursuing this goal I perform high-resolution short time scale studies to further understand local phenomena and small-scale processes that may have large-scale (temporal and spatial) impacts, as well as low-resolution climate simulations assessing climate impacts stemming from human activity.

Below you may find a brief overview of my research, which focuses on feedback mechanisms triggered in polluted marine boundary clouds. In addition to this work I have recently begun exploring the potential climate impacts due to the large-scale deployment of wind turbines and the geophysical limits of wind power imposed by the dynamics of the atmosphere.