Well, just like Lucrum, there is zero value in your posts and they are just a waste of time to to read. So, crazy boy, you are now the third idiot I have on ignore. Congrats.
Climate warming faster than feared
- Thread starter wjk
- Start date
Well, just like Lucrum, there is zero value in your posts and they are just a waste of time to to read. So, crazy boy, you are now the third idiot I have on ignore. Congrats.
"Coldest Arctic Outbreak in Midwest Since the 1990s"
http://www.weather.com/news/weather-winter/coldest-arctic-outbreak-1990s-midwest-south-east-20140103
http://www.weather.com/news/weather-winter/coldest-arctic-outbreak-1990s-midwest-south-east-20140103
Record breaking low temperatures coming to the U.S. again on Tuesday.
Somehow people with no common sense and a political agenda will associate this with "global warming".
It could be. I would try to explain but you wouldn't understand since you don't understand even the simplest things about AGW.
Every single weather event now occurring is being influenced by GW.
The study shows that by changing the temperature balance between the Arctic and mid-latitudes, rapid Arctic warming is altering the course of the jet stream, which steers weather systems from west to east around the hemisphere. The Arctic has been warming about twice as fast as the rest of the Northern Hemisphere, due to a combination of human emissions of greenhouse gases and unique feedbacks built into the Arctic climate system.
The jet stream, the study says, is becoming âwavier,â with steeper troughs and higher ridges. Weather systems are progressing more slowly, raising the chances for long-duration extreme events, like droughts, floods, and heat waves.
â[The] tendency for weather to hang around longer is going to favor extreme weather conditions that are related to persistent weather patterns,â said Francis, the studyâs lead author.
One does not have to look hard to find an example of an extreme event that resulted from a huge, slow-moving swing in the jet stream. It was a stuck or âblocking weather patternâ â with a massive dome of high pressure parked across the eastern U.S. for more than a week â that led to the remarkable March heat wave that sent temperatures in the Midwest and Northeast soaring into the 80s. In some locations, temperatures spiked to more than 40 degrees above average for that time of year.
The strong area of high pressure shunted the jet stream far north into Canada. At one point during the heat wave, a jetliner flying at 30,000 feet couldâve hitched a ride on the jet stream from Texas straight north to Hudson Bay, Canada. In the U.S., more than 14,000 warm-weather records (record-warm daytime highs and record-warm overnight lows) were set or tied during the month of March, compared to about 700 cold records.
According to the study, Arctic climate change may increase the odds that such high-impact, blocking weather patterns will occur. The study cites examples of other patterns that led to extreme events that also may bear Arctic fingerprints, including the 2011 Texas drought and heat wave, which cost the stateâs agricultural sector a staggering $7.62 billion â making it the most expensive one-year drought in that stateâs history.
In addition, the study also mentions jet stream configurations that led to heavy snows in the Northeast and Europe during recent winters. Such events are also âconsistentâ with the studyâs findings, according to the paper.
The reasons why the Arctic is heating up so quickly, a phenomenon known as âArctic amplification,â has to do with factors that are unique to the Arctic environment, involving feedbacks between sea ice, snow, water vapor, and clouds. As the area warms in response to manmade greenhouse gases, melting ice and snow allow exposed land and water to absorb more of the Sunâs heat, which melts more ice and snow, and so on. A relatively small amount of initial warming can be greatly magnified in the Far North.
The temperature contrast between the frigid Arctic and the milder mid-latitudes is what drives the powerful jet stream winds, which are so important for determining day-to-day weather conditions.
In addition to making the jet stream have more pronounced north/south swings, the reduced temperature gradient between northern and southern areas is causing the westerly component of upper-level winds to slow, especially during the fall when extra heating in the Arctic is exceptionally strong.
http://www.climatecentral.org/news/arctic-warming-is-altering-weather-patterns-study-shows
The jet stream, the study says, is becoming âwavier,â with steeper troughs and higher ridges. Weather systems are progressing more slowly, raising the chances for long-duration extreme events, like droughts, floods, and heat waves.
â[The] tendency for weather to hang around longer is going to favor extreme weather conditions that are related to persistent weather patterns,â said Francis, the studyâs lead author.
One does not have to look hard to find an example of an extreme event that resulted from a huge, slow-moving swing in the jet stream. It was a stuck or âblocking weather patternâ â with a massive dome of high pressure parked across the eastern U.S. for more than a week â that led to the remarkable March heat wave that sent temperatures in the Midwest and Northeast soaring into the 80s. In some locations, temperatures spiked to more than 40 degrees above average for that time of year.
The strong area of high pressure shunted the jet stream far north into Canada. At one point during the heat wave, a jetliner flying at 30,000 feet couldâve hitched a ride on the jet stream from Texas straight north to Hudson Bay, Canada. In the U.S., more than 14,000 warm-weather records (record-warm daytime highs and record-warm overnight lows) were set or tied during the month of March, compared to about 700 cold records.
According to the study, Arctic climate change may increase the odds that such high-impact, blocking weather patterns will occur. The study cites examples of other patterns that led to extreme events that also may bear Arctic fingerprints, including the 2011 Texas drought and heat wave, which cost the stateâs agricultural sector a staggering $7.62 billion â making it the most expensive one-year drought in that stateâs history.
In addition, the study also mentions jet stream configurations that led to heavy snows in the Northeast and Europe during recent winters. Such events are also âconsistentâ with the studyâs findings, according to the paper.
The reasons why the Arctic is heating up so quickly, a phenomenon known as âArctic amplification,â has to do with factors that are unique to the Arctic environment, involving feedbacks between sea ice, snow, water vapor, and clouds. As the area warms in response to manmade greenhouse gases, melting ice and snow allow exposed land and water to absorb more of the Sunâs heat, which melts more ice and snow, and so on. A relatively small amount of initial warming can be greatly magnified in the Far North.
The temperature contrast between the frigid Arctic and the milder mid-latitudes is what drives the powerful jet stream winds, which are so important for determining day-to-day weather conditions.
In addition to making the jet stream have more pronounced north/south swings, the reduced temperature gradient between northern and southern areas is causing the westerly component of upper-level winds to slow, especially during the fall when extra heating in the Arctic is exceptionally strong.
http://www.climatecentral.org/news/arctic-warming-is-altering-weather-patterns-study-shows
Once again you spout polititical propaganda and not facts. There is very limited evidence that man-made CO2 has any impact on global climate whatsoever. Anyone who is attempting to state that "Every single weather event now occurring is being influenced by GW" is simply playing politics and not referencing the actual raw data.
Was "every weather event" in 900AD influenced greatly by man-made CO2? Was every weather event in 1620AD influenced greatly by man-made CO2? These are periods when the global temperature was significantly greater or less than it is today.
Perhaps.
It's also being influenced by our location in the Milankovitch Cycle (I know, I know...that's a long term orbital cycle that doesn't matter in the near term), and the lowest sunspot maximum in a century, closely resembling the Maunder min, which coincided with a little ice age. There is a paper floating around stating that during that time there was reduced solar radiation for a spell. What effect would reduced solar radiation have on warming?
You believe AGW is more powerful than the effects of the sun and orbital shift. Show the models that predict the effects of these two major climate influences on AGW. After all, we can predict the intensity of sun spot activity, can't we? I certainly don't think they should be ignored, and perhaps they weren't. By the way, little ice ages can occur as quickly as the time lines the hard core AGW crowd say warming is occurring. I never see mention of that...perhaps because there can't be another ice age because of AGW. That is your belief, no?
Yes, the climatologists feel that that the greenhouse gasses will far over-ride the subtle very long term solar/orbital changes. Including sunspots and Malinkovitch.
Sigh.
Ninety-seven percent of climate scientists agree that climate-warming trends over the past century are very likely due to human activities,1and most of the leading scientific organizations worldwide have issued public statements endorsing this position. The following is a partial list of these organizations, along with links to their published statements and a selection of related resources.
AMERICAN SCIENTIFIC SOCIETIES
Statement on climate change from 18 scientific associations
"Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver." (2009)2
AAAS emblem
American Association for the Advancement of Science
"The scientific evidence is clear: global climate change caused by human activities is occurring now, and it is a growing threat to society." (2006)3
ACS emblem
American Chemical Society
"Comprehensive scientific assessments of our current and potential future climates clearly indicate that climate change is real, largely attributable to emissions from human activities, and potentially a very serious problem." (2004)4
AGU emblem
American Geophysical Union
"Human‐induced climate change requires urgent action. Humanity is the major influence on the global climate change observed over the past 50 years. Rapid societal responses can significantly lessen negative outcomes." (Adopted 2003, revised and reaffirmed 2007, 2012, 2013)5
etc
http://climate.nasa.gov/scientific-consensus