https://www.greencarcongress.com/2022/05/20220515-murakami.html
"NOAA study finds reducing particulate air pollution in N America & Europe increases hurricanes in N Atlantic
15 May 2022"
"A new NOAA study covering four decades of tropical cyclones found that reducing particulate air pollution in Europe and North America has contributed to an increase in the number of tropical cyclones in the North Atlantic basin and a decrease in the number of these storms in the Southern Hemisphere.
The open-access study, published in Science Advances, also found that the growth of particulate pollution in Asia has contributed to fewer tropical cyclones in the western North Pacific basin."...
While a number of recent studies have examined how increasing greenhouse gas emissions are impacting global tropical cyclone activity, Hiroyuki Murakami examined the less studied and highly complex area of how particulate pollution in combination with climate changes is affecting tropical cyclones in different areas of the planet. Murakami reached these conclusions using the climate model developed at NOAA GFDL.
"Over the last 40 years, Europe and North America have been leaders in reducing particulate air pollution from industry, autos, energy and other sources. The increasing absence of human-caused air pollution in the Northern Hemisphere, estimated to be a 50% drop in concentration from 1980 to 2020, has led to surface warming over the tropical Atlantic Ocean, which contributes to more frequent tropical cyclones. Without significant amounts of particulate pollution to reflect sunlight, the ocean absorbs more heat and warms faster. A warming Atlantic Ocean has been a key ingredient to a 33% increase in the number of tropical cyclones during this 40-year period, Murakami said.
The decrease in pollution has also led to a warming of the mid- and high-latitudes in the Northern Hemisphere. This warming of land and ocean is causing the steady poleward movement of the jet stream from the tropics toward the Arctic. The shift of the jet stream led to weakening westerly winds in the upper troposphere in the tropical Atlantic basin, an area of the atmosphere about 10 to 12 miles from the surface of the earth."...
How ironic... reducing GHG = warming global climate...
Cheers
"NOAA study finds reducing particulate air pollution in N America & Europe increases hurricanes in N Atlantic
15 May 2022"
"A new NOAA study covering four decades of tropical cyclones found that reducing particulate air pollution in Europe and North America has contributed to an increase in the number of tropical cyclones in the North Atlantic basin and a decrease in the number of these storms in the Southern Hemisphere.
The open-access study, published in Science Advances, also found that the growth of particulate pollution in Asia has contributed to fewer tropical cyclones in the western North Pacific basin."...
While a number of recent studies have examined how increasing greenhouse gas emissions are impacting global tropical cyclone activity, Hiroyuki Murakami examined the less studied and highly complex area of how particulate pollution in combination with climate changes is affecting tropical cyclones in different areas of the planet. Murakami reached these conclusions using the climate model developed at NOAA GFDL.
"Over the last 40 years, Europe and North America have been leaders in reducing particulate air pollution from industry, autos, energy and other sources. The increasing absence of human-caused air pollution in the Northern Hemisphere, estimated to be a 50% drop in concentration from 1980 to 2020, has led to surface warming over the tropical Atlantic Ocean, which contributes to more frequent tropical cyclones. Without significant amounts of particulate pollution to reflect sunlight, the ocean absorbs more heat and warms faster. A warming Atlantic Ocean has been a key ingredient to a 33% increase in the number of tropical cyclones during this 40-year period, Murakami said.
The decrease in pollution has also led to a warming of the mid- and high-latitudes in the Northern Hemisphere. This warming of land and ocean is causing the steady poleward movement of the jet stream from the tropics toward the Arctic. The shift of the jet stream led to weakening westerly winds in the upper troposphere in the tropical Atlantic basin, an area of the atmosphere about 10 to 12 miles from the surface of the earth."...
How ironic... reducing GHG = warming global climate...
Cheers