Global warming – Yahoo News
SOURCE: AFP VIDEOGRAPHICS
-Zoom in on the Earth from space-Wide shot of the earth, surrounded by gas-Diagram of an envelope around the earth-Ice enveloping the Earth-Zoom in on a magnifying glass on earth that shows the molecules of greenhouse gases-Zoom out from the ground: diagram of a thermometer showing the temperature rise-Zoom in on the earth’s surface with factory, vehicles and transport, -Intensive farming, tractors and cows-A bulldozer crushes a forest-Formation of a desert instead of the forest-Appearance of animal skeletons under the sun-Icebergs on the sea surface-Dying fish swim above the seabed
AFP TEXTEOctober 7, 2020
Earth’s surface was warmer last month than during any September on record, with temperatures since January tracking those of the hottest ever calendar year in 2016, the European Union’s Earth Observation Programme said Wednesday.
This year has now seen three months of record warmth — January, May and September — with June and April virtually tied for first, the Copernicus Climate Change Service reported.
“There is currently little difference between 2020 and 2016 for the year-to-date,” Copernicus senior scientist Freja Vambourg told AFP.
For the 12-month period through September, the planet was nearly 1.3 degrees Celsius above pre-industrial levels.
That is alarmingly close to the 1.5C threshold for severe impacts detailed in a major 2018 report by the UN’s climate science advisory panel, the IPCC….(continues)
Once global warming was exclusively a naturally-occurring process.The Earth’s atmosphere is made up of gases, some of which absorb infrared radiation. This means they retain heat from the sun, forming a thermal layer around the planet.Without this so-called greenhouse effect, temperatures would be around -18 degrees Celsius, so there would be no — or little — life on Earth. But the warming process has been destabilized, as levels of key greenhouse gases — carbon dioxide, methane and nitrous oxide — have reached their highest in 800,000 years. In the last 130 years the global average surface temperature has risen by 0.85 degrees Celsius. The current trend could lead to a four degree rise after another 80 years.
Scientists agree that humans are influencing the climate system through: Fossil fuel burning; around 2,000 billion tonnes of CO2 have been emitted since the start of the Industrial Revolution in 1750.Intensive agriculture; methane produced by the sector accounts for 10-12 percent of global greenhouse gas emissions — 40 percent of which comes from livestock aloneAnd deforestation; which destroys CO2-absorbing vegetation.Recent climate changes are already impacting humans and natural systems worldwide, with an increase in phenomena like: -worsening drought-flooding -rising seas as glaciers melt and sea water expands-ocean acidification-and the extinction of speciesUnited Nations’ climate experts warn of devastating and irreversible consequences if global warming is not quickly and sharply limited. Sources: IPCC, NOAA, NASA