2020 is likely to be the hottest year ever recorded despite major declines in air pollution during coronavirus shutdowns, according to new report from the National Oceanic and Atmospheric Administration
- US monitoring agency gives a 75 percent chance 2020 will be hottest year ever
- The rising heat comes despite droppng pollution during COVID-19 shutdowns
- Scientists say the rise will be driven by the accumulated greenhouse gases already in the atmosphere
- Here’s how to help people impacted by Covid-19
A new report from the US National Oceanic and Atmospheric Administration says there is a 75 percent chance that 2020 will be the hottest year in recorded history.
Despite major reductions in air pollution across the world during COVID-19 shutdowns, climate scientists predict temperatures will continue to rise because of how much cumulative greenhouse gases are already in the atmosphere.
If 2020 doesn’t pass the previous hottest year on record, 2016, the NOAA says it’s all but certain to rank in the top five, all of which have happened since 2015.
The US National Oceanic and Atmospheric Administration’s Global Climate Report says there’s a 75 percent chance that 2020 will be the hottest year on record, passing the previous high of 2016
‘The emissions will go down this year, but the concentrations keep on rising,’ University of Oxford climate scientist Karsten Haustein told The Guardian. ‘We are very unlikely to be able to notice any slowdown in the built-up of atmospheric GHG levels.’
‘But we have the unique chance now to reconsider our choices and use the corona crisis as a catalyst for more sustainable means of transport and energy production (via incentives, taxes, carbon prices etc).’
An earlier estimate from The Met Office also put the odds of 2020 being the hotest year yet on record at 50 percent.
WHAT ARE THE HOTTEST YEARS ON RECORD?
The hottest years ever recorded are:
Source: Climate Central
NASA’s Goddard Institute for Space Studies in New York recently released their own report giving a 60 percent chance that 2020 will pass 2016’s previous high.
Whether this year, actually breaks the previous record, climate scientists agree the warming trend in recent years could lead to environmental catastrophe.
‘Greenhouse gas concentrations are at the highest levels in three million years – when the Earth’s temperature was as much as three degrees hotter and sea levels some 15 meters higher,’ UN Antonio Guterres said in March.
‘Ocean heat is at a record level, with temperatures rising at the equivalent of five Hiroshima bombs a second.’
2020 has already seen a number of record-breaking highs, with the hottest January on record, with some parts of Europe experiencing temperatures 10.8 degrees Fahrenheit warmer than the 1981-2010 averages.
In February, temperatures in Antartica reached a shocking 68 degrees Fahrenheit, and average global temperatures were the second hottest ever, behind 2016.
WHAT IS AIR POLLUTION?
Emissions
Carbon dioxide
Carbon dioxide (CO2) is one of the biggest contributors to global warming. After the gas is released into the atmosphere it stays there, making it difficult for heat to escape – and warming up the planet in the process.
It is primarily released from burning fossil fuels such as coal, oil and gas, as well as cement production.
The average monthly concentration of CO2 in the Earth’s atmosphere, as of April 2019, is 413 parts per million (ppm). Before the Industrial Revolution, the concentration was just 280 ppm.
CO2 concentration has fluctuated over the last 800,000 years between 180 to 280ppm, but has been vastly accelerated by pollution caused by humans.
Nitrogen dioxide
The gas nitrogen dioxide (NO2) comes from burning fossil fuels, car exhaust emissions and the use of nitrogen-based fertilisers used in agriculture.
Although there is far less NO2 in the atmosphere than CO2, it is between 200 and 300 times more effective at trapping heat.
Sulfur dioxide
Sulfur dioxide (SO2) also primarily comes from fossil fuel burning, but can also be released from car exhausts.
SO2 can react with water, oxygen and other chemicals in the atmosphere to cause acid rain.
Carbon monoxide
Carbon monoxide (CO) is an indirect greenhouse gas as it reacts with hydroxyl radicals, removing them. Hydroxyl radicals reduce the lifetime of carbon dioxide and other greenhouse gases.
Particulates
What is particulate matter?
Particulate matter refers to tiny parts of solids or liquid materials in the air.
Some are visible, such as dust, whereas others cannot be seen by the naked eye.
Materials such as metals, microplastics, soil and chemicals can be in particulate matter.
Particulate matter (or PM) is described in micrometres. The two main ones mentioned in reports and studies are PM10 (less than 10 micrometres) and PM2.5 (less than 2.5 micrometres).
Air pollution comes from burning fossil fuels, cars, cement making and agriculture
Scientists measure the rate of particulates in the air by cubic metre.
Particulate matter is sent into the air by a number of processes including burning fossil fuels, driving cars and steel making.
Why are particulates dangerous?
Particulates are dangerous because those less than 10 micrometres in diameter can get deep into your lungs, or even pass into your bloodstream. Particulates are found in higher concentrations in urban areas, particularly along main roads.
Health impact
What sort of health problems can pollution cause?
According to the World Health Organization, a third of deaths from stroke, lung cancer and heart disease can be linked to air pollution.
Some of the effects of air pollution on the body are not understood, but pollution may increase inflammation which narrows the arteries leading to heart attacks or strokes.
As well as this, almost one in 10 lung cancer cases in the UK are caused by air pollution.
Particulates find their way into the lungs and get lodged there, causing inflammation and damage. As well as this, some chemicals in particulates that make their way into the body can cause cancer.
Deaths from pollution
Around seven million people die prematurely because of air pollution every year. Pollution can cause a number of issues including asthma attacks, strokes, various cancers and cardiovascular problems.
Asthma triggers
Air pollution can cause problems for asthma sufferers for a number of reasons. Pollutants in traffic fumes can irritate the airways, and particulates can get into your lungs and throat and make these areas inflamed.
Problems in pregnancy
Women exposed to air pollution before getting pregnant are nearly 20 per cent more likely to have babies with birth defects, research suggested in January 2018.
Living within 3.1 miles (5km) of a highly-polluted area one month before conceiving makes women more likely to give birth to babies with defects such as cleft palates or lips, a study by University of Cincinnati found.
For every 0.01mg/m3 increase in fine air particles, birth defects rise by 19 per cent, the research adds.
Previous research suggests this causes birth defects as a result of women suffering inflammation and ‘internal stress’.
What is being done to tackle air pollution?
Paris agreement on climate change
The Paris Agreement, which was first signed in 2015, is an international agreement to control and limit climate change.
It hopes to hold the increase in the global average temperature to below 2°C (3.6ºF) ‘and to pursue efforts to limit the temperature increase to 1.5°C (2.7°F)’.
Carbon neutral by 2050
The UK government has announced plans to make the country carbon neutral by 2050.
They plan to do this by planting more trees and by installing ‘carbon capture’ technology at the source of the pollution.
Some critics are worried that this first option will be used by the government to export its carbon offsetting to other countries.
International carbon credits let nations continue emitting carbon while paying for trees to be planted elsewhere, balancing out their emissions.
No new petrol or diesel vehicles by 2040
In 2017, the UK government announced the sale of new petrol and diesel cars would be banned by 2040.
From around 2020, town halls will be allowed to levy extra charges on diesel drivers using the UK’s 81 most polluted routes if air quality fails to improve.
However, MPs on the climate change committee have urged the government to bring the ban forward to 2030, as by then they will have an equivalent range and price.
The Paris Agreement, which was first signed in 2015, is an international agreement to control and limit climate change. Pictured: air pollution over Paris in 2019.
Norway’s electric car subsidies
The speedy electrification of Norway’s automotive fleet is attributed mainly to generous state subsidies. Electric cars are almost entirely exempt from the heavy taxes imposed on petrol and diesel cars, which makes them competitively priced.
A VW Golf with a standard combustion engine costs nearly 334,000 kroner (34,500 euros, $38,600), while its electric cousin the e-Golf costs 326,000 kroner thanks to a lower tax quotient.
Criticisms of inaction on climate change
The Committee on Climate Change (CCC) has said there is a ‘shocking’ lack of Government preparation for the risks to the country from climate change.
The committee assessed 33 areas where the risks of climate change had to be addressed – from flood resilience of properties to impacts on farmland and supply chains – and found no real progress in any of them.
The UK is not prepared for 2°C of warming, the level at which countries have pledged to curb temperature rises, let alone a 4°C rise, which is possible if greenhouse gases are not cut globally, the committee said.
It added that cities need more green spaces to stop the urban ‘heat island’ effect, and to prevent floods by soaking up heavy rainfall.
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