How well do Germans understand weather risks?

May 29, 2020

Although the current focus is on coronavirus, it is important not to forget a crisis that poses an even greater threat in the long term: climate change. As climate change unfolds, the number of extreme weather events is increasing worldwide. These events require effective responses not only on the part of the authorities, but also on the part of every individual. Only those who can gauge weather risks correctly are able to take the necessary precuations. But how savvy is the general population when it comes to weather risks? How well do we understand the uncertainty of weather forecasts? And how aware are we of climate change, which will further intensify weather risks in the future?

To answer these questions, researchers from the Max Planck Institute for Human Development and the Hans Ertel Centre for Weather Research surveyed 1,004 Germans aged between 14 and 93 years. The respondents answered 62 factual questions about weather conditions such as heat, UV radiation, thunderstorms, heavy rain, and ground frost and their impacts, as well as on forecast uncertainty and climate change in Germany to date.

Respondents had difficulties judging weather risks in several areas. For example, 44% of participants believed that ground frost, which may cause icy conditions on roads and pavements, is only possible at air temperatures of 0 degrees Celsius and below--a misconception that can be treacherous. In fact, the temperature just above ground level can drop below zero even when the air temperature reported in the weather forecast is above zero: Air temperature is typically measured two meters above the ground. What's more, 66% of respondents falsely believed that higher temperatures mean higher UV radiation levels. UV radiation is actually highest around midday, whereas temperatures tend to continue rising over the course of the day. And if a thunderstorm were approaching, many respondents would probably not take shelter in time: Only one fifth of respondents correctly estimtated that a 30-second gap between a lightning flash and the sound of thunder means that a thunderstorm is about 10 kilometers away. More than a quarter of respondents thought it was about 30 kilometers away, thus severely underestimating their distance from the storm.

At the same time, there was uncertainty about how to interpret probabilistic forecasts. Only one fifth of respondents knew that a forecast predicting a 30% chance of rain in Berlin means that it will rain in Berlin on 30% of all days with that forecast. Many respondents mistakenly thought it meant that it will rain in 30% of the area or for 30% of the day. According to the study's authors, it is up to weather communicators to resolve this uncertainty. It is their responsibility to make clear and transparent what the probabilities refer to.

With regard to evidence for climate change in Germany since 1880, 70% of respondents were aware that the average temperature in Germany has risen. But 80% believed that storm intensity has increased, whereas in fact there is no evidence for any long-term change in Germany in this respect. "This perception could be influenced by recent extreme events and the broad media coverage of them," says lead author Nadine Fleischhut, researcher at the Max Planck Institute for Human Development, and principle investigator of the WEXICOM project on the communication of weather warnings at the Hans Ertel Centre for Weather Research. As co-author Ralph Hertwig, Director at the Max Planck Institute for Human Development, adds: "If people don't properly understand weather risks in the here and now, it is unlikely that they will be able to grasp the impact that climate change will have in the future. Daily weather forecasts could be an opportunity for a literacy offensive, helping us all to become a little smarter every day in our understanding of weather, climate, and uncertainty."

The study's authors call for efforts to further improve the communication of extreme weather events and their impacts. Forecasts should not focus exclusively on the weather event itself, but also predict its impacts, such as traffic jams or economic damage to buildings. At the same time, the certainty of forecasts should be communicated more transparently. "Impact forecasts must be carefully designed and tested to avoid unintended consequences, such as overreaction or trivialization of risks," says co-author Stefan Herzog, head of the Boosting Decision Making research area in the Center for Adaptive Rationality at the Max Planck Institute for Human Development. The authors call on experts from meteorology, psychology, and journalism to cooperate in designing effective communication formats.
-end-


Max Planck Institute for Human Development

Related Climate Change Articles from Brightsurf:

Are climate scientists being too cautious when linking extreme weather to climate change?
Climate science has focused on avoiding false alarms when linking extreme events to climate change.

Mysterious climate change
New research findings underline the crucial role that sea ice throughout the Southern Ocean played for atmospheric CO2 in times of rapid climate change in the past.

Mapping the path of climate change
Predicting a major transition, such as climate change, is extremely difficult, but the probabilistic framework developed by the authors is the first step in identifying the path between a shift in two environmental states.

Small change for climate change: Time to increase research funding to save the world
A new study shows that there is a huge disproportion in the level of funding for social science research into the greatest challenge in combating global warming -- how to get individuals and societies to overcome ingrained human habits to make the changes necessary to mitigate climate change.

Sub-national 'climate clubs' could offer key to combating climate change
'Climate clubs' offering membership for sub-national states, in addition to just countries, could speed up progress towards a globally harmonized climate change policy, which in turn offers a way to achieve stronger climate policies in all countries.

Review of Chinese atmospheric science research over the past 70 years: Climate and climate change
Over the past 70 years since the foundation of the People's Republic of China, Chinese scientists have made great contributions to various fields in the research of atmospheric sciences, which attracted worldwide attention.

A CERN for climate change
In a Perspective article appearing in this week's Proceedings of the National Academy of Sciences, Tim Palmer (Oxford University), and Bjorn Stevens (Max Planck Society), critically reflect on the present state of Earth system modelling.

Fairy-wrens change breeding habits to cope with climate change
Warmer temperatures linked to climate change are having a big impact on the breeding habits of one of Australia's most recognisable bird species, according to researchers at The Australian National University (ANU).

Believing in climate change doesn't mean you are preparing for climate change, study finds
Notre Dame researchers found that although coastal homeowners may perceive a worsening of climate change-related hazards, these attitudes are largely unrelated to a homeowner's expectations of actual home damage.

Older forests resist change -- climate change, that is
Older forests in eastern North America are less vulnerable to climate change than younger forests, particularly for carbon storage, timber production, and biodiversity, new research finds.

Read More: Climate Change News and Climate Change Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.