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NASA scientists have developed a new model that is among the first to simulate the strength of updrafts in storms. This model was applied to a global warming scenario to give a possible peek at what future weather might look like

NASA's Goddard Institute for Space Studies is a leading research center, located in New York, which studies Earth's past, present and future climates.

The Institute has recently announced a new study which discusses what future storms might look like in a global warming scenario.

NASA's scientists at the Institute developed a new climate model for the study.  The model is among the first to successfully simulate the strength of updrafts in storms.  This allows the model to give a more complete picture of the strength of storms that are occurring around the world, and those that may someday occur.

The model is the first to successfully simulate the observed difference between land and sea storms.  It also is the first model to simulate how the strength of storms may change in a warming environment.

The model is run over regions several hundred miles wide.  It does not directly simulate thunderstorms and lightning, but instead identifies conditions conducive to producing storms of varying strengths.

The model was applied to a future scenario in which the temperature had risen 5 degrees and CO2 levels in the air had doubled.  This simulation found that the land would be warmed more than the sea, and that thunderstorms on land would be produced at higher altitudes than they are today, leading to higher intensity.

The model predicts that some regions will have less humid climates, which would indicate fewer thunderstorms.  However, Anthony Del Genio, Ph.D., lead author illustrates why this scenario may be more dangerous, particularly to western wildfire-prone states:
"These findings may seem to imply that fewer storms in the future will be good news for disastrous western U.S. wildfires, but drier conditions near the ground combined with higher lightning flash rates per storm may end up intensifying wildfire damage instead"
Central and Eastern U.S. are particularly prone to severe thunderstorms.  These storms arise when strong updrafts combine with horizontal winds to produce thunderstorms and deadly tornados.  The study indicates that this most extreme class of storms will become increasingly common, in these areas, with warming.

These increases in storm severity are due to two factors.  First, the land warms more than the sea, respectively.  Second the freezing level, will raise to a higher altitude, where stronger updrafts are present.  These factors are both common to all climate change simulations, but this is the first simulation to explore their effects on storm intensity.

A movie of cloud cover in 2000 generated from data from the GOES-11 satellite, which was used to verify the model, is posted on NASA's website.


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RE: Very Hypothetical - Is this FUD?
By Murst on 9/2/2007 7:46:12 PM , Rating: 2
quote:
I also wonder why NASA is wasting taxpayer dollars running simulations under conditions that wildly unrealistic, and then publishing press releases with the results. Are they actively trying to add to the global warming fear mongering/FUD? What's the motivation exactly of studying something so hypothetical?


It is probably much easier to learn from extreme conditions than to attempt to predict the weather w/ a .01 degree change. Hell, we can't even correctly predict a 5 degree change (otherwise an article like this would be useless, as the conclusion would be obvious). You've got to start somewhere, and considering that global warming exists, it makes more sense to make a prediction of a temperature increase than a temperature decrease.

Also, I do like the fact that NASA works on stuff like this. No business would do it because there's no way to profit from it. However, research at NASA is not motivated by profit, at least not nearly on the scale of, say, IBM. The same can be said of SETI or the project that attempts to monitor large objects approaching earth. Are they also a waste of our money? Isn't finding ET life, especially something intelligent, even more unrealistic than a 5 degree warming of the earth?

The beautiful thing about NASA research is the by-products. There's been many great advances in the last 50 years that came about because of NASA - things that came about that had nothing to do with the original goal.


RE: Very Hypothetical - Is this FUD?
By TomZ on 9/2/2007 10:57:29 PM , Rating: 2
I personally wouldn't equate the merits of the type of research higlighted by this article against some of the technology that NASA's developed throughout the years. These are entirely different situations, in my view.


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