Cabot Institute for the Environment blog

Jonathan Bamber , Author provided Greenland is the largest island in the world and on it rests the largest ice mass in the Northern Hemisphere. If all that ice melted, the sea would rise by more than 7 metres . But that’s not going to happen is it? Well not any time soon, but understanding how much of the ice sheet might melt over the coming century is a critical and urgent question that scientists are trying to tackle using sophisticated numerical models of how the ice sheet interacts with the rest of the climate system . The problem is that the models aren’t that good at reproducing recent observations and are limited by our poor knowledge of the detailed topography of the subglacial terrain and fjords, which the ice flows over and in to. One way around this problem is to see how the ice sheet responded to changes in climate in the past and compare that with model projections for the future for similar changes in temperature. That is exactly w...

What do Bristol residents really think about climate change? We know that Bristol has a reputation as a green city, but is it just ‘greenies’ at the centre of town who care? What kinds of policies would be acceptable or desirable? Are people aware of what the Council is planning to do? Our team of eight researchers set out to all four corners of the city with clipboards , to find out what Bristol residents have to say. They approached people at bus stops, in leisure centres, at libraries and on the street to ask questions like: What comes to mind when you think of climate change? How does it make you feel? Are you aware of any planned changes in the city in relation to climate change? Are there any future changes you would or wouldn’t want to see? The answers came in from 333 residents of all parts of the city in February and March 2020, and then a further 1343 residents took part in an online survey in June, which included an additional question about whether Covid-19 had shifted thei...

Evidence that the Earth is warming at an alarming rate is indisputable, having almost doubled per decade since 1981 (relative to 1880-1981). In many countries, this warming has been accompanied by more frequent and severe heatwaves – prolonged periods of significantly above-average temperatures – especially during summer months. Heatwaves pose significant threats to human health including discomfort, heatstroke and in extreme cases, death. In the summer of 2003 (one that I am sure many remember for its tropical temperatures), these threats were clear. A European heatwave event killed over 70,000 people across the continent – over 2,000 of these deaths were in England alone. As if these statistics weren’t alarming enough, projections suggest that by 2050, such summers could occur every other year and by 2080, a similar heatwave could kill three times as many people . Cities face heightened risks Heat-health risks are not equally distributed. Cities face heightened risks due to the u...

Voi e-scooter parked across the pavement outside Victoria Rooms in Clifton. Image credit: Georgina de Courcy-Bower At the end of October this year, the Swedish company Voi launched their e-scooters in Bristol as part of a pilot scheme. The government brought the scheme forward in the hope that e-scooters would ease demand for public transport and allow for social distancing during the Covid-19 pandemic. Earlier in the year, Marvin Rees said that he hoped e-scooters would help the city reduce congestion and air pollution. These are two key issues associated with a car-dominated transport system present in Bristol and many other cities around the world.  I have been investigating whether e-scooters could help Bristol to meet its sustainable transport targets . These include meeting net-zero emissions by 2030 and simultaneously reducing inequality within the city. However, between 2005 and 2017 the decrease in CO2 emissions in Bristol’s transport sector was only 9%. To reach net-z...

FrankHH/Shutterstock Is hydrogen the lifeblood of a low-carbon future, or an overhyped distraction from real solutions? One thing is certain – the coal, oil and natural gas which currently power much of daily life must be phased out within coming decades. From the cars we drive to the energy that heats our homes, these fossil fuels are deeply embedded in society and the global economy. But is the best solution in all cases to swap them with hydrogen – a fuel which only produces water vapour, and not CO₂, when burned? Answering that question are six experts in engineering, physics and chemistry. Road and rail Hu Li, Associate Professor of Energy Engineering, University of Leeds Transport became the UK’s largest source of greenhouse gas emissions in 2016, contributing about 28% of the country’s total. Replacing the internal combustion engines of passenger cars and light-duty vehicles with batteries could accelerate the process of decarbonis...