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SUMMARY:How mathematics helps structuring climate discussions - Rothschild
  Distinguished Visiting Fellow Lecture - Rupert Klein (Freie Universität 
 Berlin)
DTSTART:20220601T150000Z
DTEND:20220601T160000Z
UID:TALK171755@talks.cam.ac.uk
DESCRIPTION:Mathematics in climate research is often thought to be mainly 
 a provider of techniques for solving the continuum mechanical equations fo
 r the flows of the atmosphere and oceans\, for the motion and evolution of
  Earth&rsquo\;s ice masses\, and the like. Three examples will elucidate t
 hat there is a much wider range of opportunities.\nClimate modellers often
  employ reduced forms of &ldquo\;the continuum mechanical equations&rdquo\
 ; to efficiently address their research questions of interest. The first e
 xample discusses how mathematical analysis can provide systematic guidelin
 es for the regime of applicability of such reduced model equations.\nMeteo
 rologists define &ldquo\;climate&rdquo\;\, in a narrow sense\, as &ldquo\;
 the statistical description in terms of the mean and variability of releva
 nt quantities over a period of time&rdquo\; (World Meteorological Society\
 ,http://www.wmo.int\; see the website for a broader sense definition). Now
 \, climate researchers are most interested in changes of the climate over 
 time\, and yet there is no unique\, well-defined notion of &ldquo\;time de
 pendent statistics&rdquo\;. In fact\, there are restrictive conditions whi
 ch data from time series need to satisfy for classical statistical methods
  to be applicable. The second example describes recent developments of ana
 lysis techniques for time series with non-trivial temporal trends.\nModern
  climate research has joined forces with economy and the social sciences t
 o generate a scientific basis for informed political decisions in the face
  of global climate change. One major type of problems hampering progress o
 f the related interdisciplinary research consists of often subtle language
  barriers. The third example describes how mathematical formalization of t
 he notion of &ldquo\;vulnerability&rdquo\; has helped structuring related 
 interdisciplinary research efforts.
LOCATION:Seminar Room 1\, Newton Institute
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