Monthly focus

Keeping an eye on Earth

08 May 2018

Among other things, satellites can help observe effects of climate change by measuring sea levels from space. Image credit - NASA/JPL-Caltech, in the public domain

Every minute, satellites and sensors collect enormous amounts of data about the world around us – from temperature to pollution and forest cover to soil quality. This month, Horizon looks into the technologies behind Earth observation and how we can make best use of the vast amounts of information produced. We find out how measurements taken by people with smartphones on the ground can feed into local datasets and how the minituarisation of satellites is creating opportunities for start-ups to enter the Earth observation market. We also discover how measurements are being used to protect ecosystems and what historical data can tell us about extreme weather such as hurricanes and droughts.

space

28 May 2018

Microsatellite swarms could paint clearer picture of our planet

Tiny, low-cost satellites that can work together to boost their output and a technology that reduces the loss of satellite data are two of the latest innovations to hit the Earth observation market – and the results promise to reveal a more detailed image of our planet.

environment | ict | interview

22 May 2018

Cleaned-up data shows bigger-than-thought reduction in Europe’s NO2 pollution – Dr Folkert Boersma

An analysis of a newly cleaned-up dataset tracking Europe’s air pollution has revealed that nitrogen dioxide levels are on a steeper downward trend than previously thought, according to Dr Folkert Boersma from the Royal Netherlands Meteorological Institute, who says that ensuring the quality of Earth observation data can reveal new insights into climate change.

space | environment

16 May 2018

Supercomputers and space-based laser to help predict extreme weather events

From droughts and forest fires to floods and big freezes, extreme weather events are on the rise. But to what extent are these linked to climate change? Just months before the world’s first wind monitoring satellite enters orbit, scientists have finalised a climate model with exceptional resolution, and the new tools will help identify how climate change impacts weather-related natural disasters like storm surges, hurricanes and heatwaves.

environment

08 May 2018

Earth observations show Europe’s natural wealth in steep decline

In March 2018, French scientists reported a steep decline in the country’s bird populations, primarily as a result of agricultural activity. Causes include the increase in monoculture, detrimental land-use policies and, perhaps most importantly, the growth in the use of powerful pesticides such as neonicotinoids, which, by killing off insects, reduces the bird population by reducing the food available to them.

Recommended for you

New ways of recycling and reusing products will reduce the amount of waste going into landfill. Image credit - Flickr/ Wisconsin Department of Natural Resources, licensed under CC BY-ND 2.0

Turning trash into treasure

Dumped waste, from used nappies to industrial by-products, have long wound up in landfills and can take hundreds of years to decay. In October we speak to the scientists figuring out how to keep such items in use to reduce rubbish and create a so-called circular economy. We learn about new efforts to mine industrial waste for the rare metals that go into making aircraft parts, pacemakers and bicycle gears, and find out about the culture shift needed to develop a zero-waste society. We also speak to the researchers building a biorefinery to turn soiled nappies into fertilisers and raw materials, and look at whether seaweed could become the next plastic.

Are these 10 000+ galaxies captured by the NASA/ESA Hubble Space Telescope moving faster everyday? Image credit - NASA/ ESA/ STScI (S. Beckwith)/ HUDF Team

The expanding universe

The model of our universe as expanding at an accelerated rate has given rise to theoretical constructs such as dark energy and dark matter, which scientists believe could make up 95% of the universe. In September, Horizon takes a deeper look at what we really know about the expanding universe. We speak to Prof. Subir Sarkar, who believes that the Nobel-winning discovery that universe expansion acceleration could be a fluke, and the scientists who are trying to answer the question by allowing us to better measure the expansion rate. We also look at the significance of accurately measuring gravity in deep space, and what dark matter haloes can tell us about the existence of dark energy.

Bill Gates and Commissoner Carlos Moedas committed to establish a fund to get radical new clean energy technologies to market. Image credit - European Commission

Bill Gates and European Commission launch €100 million clean energy fund

Bill Gates and the European Commission have launched a €100 million investment fund designed to bring radical clean energy technologies more quickly to market in order to promote energy efficiency and cut greenhouse gas emissions.

Trucks on Orkney carry hydrogen produced by wind- and tide-powered electrolysis in special lightweight high pressure cylinders, designed to adhere to the low weight limit of the island roads. Image credit: Colin Keldie for BIG HIT

Hydrogen use doesn’t emit carbon but its production often does. That could soon change

Hydrogen can be used to power cars, supply electricity and heat homes, all with zero carbon emissions. The snag is that the vast majority of hydrogen itself is derived from fossil fuels – a fact that scientists are now hoping to change. They plan to clean up production to kickstart a dedicated economy – something that has already found small-scale success in Scotland’s Orkney Islands.

Keeping an eye on Earth

Republish this content

Microsatellite swarms could paint clearer picture of our planet

Cleaned-up data shows bigger-than-thought reduction in Europe’s NO2 pollution – Dr Folkert Boersma

Supercomputers and space-based laser to help predict extreme weather events