More extreme weathers in the US
If it is not a global warning behind these extreme weathers them who is the culprit?
10 months ago
“Climate change” and “global warming” are often used interchangeably but have distinct meanings. Similarly, the terms "weather" and "climate" are sometimes confused, though they refer to events with broadly different spatial- and timescales.
Weather vs. climate: Weather refers to atmospheric conditions that occur locally over short periods of time—from minutes to hours or days. Familiar examples include rain, snow, clouds, winds, floods or thunderstorms. Climate, on the other hand, refers to the long-term regional or even global average of temperature, humidity and rainfall patterns over seasons, years or decades.
What is global warming: refers to the long-term warming of the planet since the early 20th century, and most notably since the late 1970s, due to the increase in fossil fuel emissions since the Industrial Revolution. Worldwide since 1880, the average surface temperature has gone up by about 1 °C (about 2 °F), relative to the mid-20th-century baseline (of 1951-1980). This is on top of about an additional 0.15 °C of warming from between 1750 and 1880.
What is climate change: Climate change refers to a broad range of global phenomena created predominantly by burning fossil fuels, which add heat-trapping gases to Earth’s atmosphere. These phenomena include the increased temperature trends described by global warming, but also encompass changes such as sea level rise; ice mass loss in Greenland, Antarctica, the Arctic and mountain glaciers worldwide; shifts in flower/plant blooming; and extreme weather events.
Is it climate change: The emerging field of “event attribution” is enabling scientists to better understand the drivers of extreme weather. New and stronger evidenceconfirms that abnormally high temperatures and associated extreme weather are indeed related to human activities. For example, the very latest attribution study found that human-caused climate change had at least doubled the likelihood of the remarkable northern Europe heatwave in 2018.
- Rainfall is harder to predict, as it depends more on relatively local factors such as atmospheric circulation and the availability of moisture. Many of these processes are not adequately represented in observational data or climate models. So, while a warmer world is associated with an increase in atmospheric moisture, what that means for extreme rainfall events in the UK will vary substantially from region to region.
- Having said that, we can use past observations and future climate model experiments to infer whether the intensity and likelihood of such events are a result of climate change.
- In December 2015 Storm Desmond travelled across the North Atlantic, leaving in its wave an “atmospheric river” of super-moist air. Record-breaking rainfall caused major flooding across Ireland and northern England. Researchers at Oxford University and the Royal Netherlands Meteorological Institute have shown climate change increased the frequency of a rainfall event like Storm Desmond by 59%.
- This isn’t the first time that extreme UK rainfall has been linked to a changing climate. By analysing the extremely wet winter in 2013/14, scientists found that climate change had made such a season 25% more likely.
- While there are many uncertainties in attribution studies, researchers have shown that human-caused climate change is nudging the temperatures up and increasing the odds of new extremes in heat and rainfall.
Climate Reality Leader
Not just in the US. Climate change phenomena causing devastating damage are increasingly more frequent and intense on a continuous basis.. In the last 50 years, atmospheric CO2 and other GHG level have grown exponentially, not cyclically, That impact is anthropogenic, meaning that it's related to human activity. Unfortunately, we might be near a thresold or point of no return where mitigation efforts might not be enough to avoid massive floods, extreme weather, etc. Global meetings (COP) haven't been successful in the last 20 years in agreeing caring policies and divesting from fuel and carbon energy. Sad reality.