NP
Nonlinear Processes in Geosciences

Anna von der Heydt

I am an assistant professor at the Institute for Marine and Atmospheric Research at Utrecht University, the Netherlands. My work focusses on (palaeo-) climate phenomena and transition behaviour in climate using a hierarchy of climate models and stochastic dynamical systems approaches. Moreover I’m using state-of-the-art (high resolution) climate models to quantify the state-dependent climate response to forcing. Currently I am active in the Netherlands Earth System Science Centre (NESSC), the Centre for Complex Systems Studies in Utrecht (CCSS) and a H2020 funded project on tipping points in the Earth System (TiPES).

COVID-19-related drop in anthropogenic aerosol emissions in China and corresponding cloud and climate effects

May 29, 2020
COVID-19-related drop in anthropogenic aerosol emissions in China and corresponding cloud and climate effects
Observed reduced NO2 concentration above China in February 2020. Shown is the difference between February 2020 and the average of February 2018 and 2019. Figure from https://doi.org/10.31223/osf.io/z5dm8.

While a previous blog entry dealt with the question whether we can use lessons from the nonlinear nature of climate for projections of the Covid-19 pandemic, there is now a first example of how the pandemic can teach us something on climate. The several weeks long lockdown of China made February 2020 an exceptional month in terms of air quality; aerosol emissions were tremendously reduced leading ...[Read More]

Workshop report: Mathematics of the Economy and Climate

September 9, 2019
Workshop report: Mathematics of the Economy and Climate
Percentage change in regional GDP under a laissez-faire scenario in 2100. Source: http://www.econ.yale.edu/smith/pctgdp1.mp4 .

Just before the summer a group of about 40 scientists gathered in an old Monastery in the Netherlands (Kontakt der Kontinenten, Soesterberg) for a rather special collaborative workshop entitled “Mathematics of the economy and climate”. Mathematicians, climate scientists and economists – a group of scientists that normally does not mix and are rather unfamiliar with each other’s researc ...[Read More]