Geoffrey Vallis, University of Exeter
Global warming is one of the least controversial phenomena in science. We are as sure that it is happening, and what the main cause is, as we are about almost anything. Unfortunately, this knowledge does not translate to being able to predict what will happen to the climate and weather. The thermodynamic response is well understood. Thus, although the amount of warming remains uncertain, we know the sign of the response and that it is a radiative effect amplified by water vapour feedback. We also understand the changes in thermal structure – the tropopause height will increase and the stratosphere will cool – and such responses are well reproduced by models. However, the dynamical responses that affect the general circulation – the poleward movement of the jets is one example – are less well understood and less consistently reproduced by climate models. We will discuss what the results are, what the mechanisms might be, why models might differ, and what we can do about it.
Diversity and interdisciplinarity – these two keywords are the core of our research at the KlimaCampus Hamburg as well as of our seminar series “KlimaCampus Colloquium”: During the academic term we invite international renowned scientists from various disciplines to present and discuss current challenges in climate research aiming at stimulating communication across the different partner institutes of the KlimaCampus Hamburg. The lectures are held in English, and everybody interested is welcome to attend.
Location and Time:
Thursday, 4:15 pm
Bundesstraße 53, room 022/023 (ground floor)
We provide a childcare service during the colloquium. Please contact Nicolli Povijac at least 8 days in advance.