is hurricanes and tornadosa cause of global warming?

Question

for a project

Answer 1

Hurricaines are an intense tropical storm. Tropical storms form over warm tropical oceans during periods when sea surface temperatures are above 26.5 °C (80 °F). Under these conditions, evaporation from the ocean surface generates high humidity in the atmosphere which creates thunderstorms. When a system of powerful thunderstorms converges and begins to rotate in the atmosphere, it forms a vortex known as a tropical depression. Heat from the ocean is drawn up through the center of the vortex and released to the atmosphere as water vapor which then condenses to form rain around the perimeter of the vortex. Energy from ocean heat also generates high winds. The more heat available in the surface water, the more potential there is to generate heavy rain and high wind. When and if speeds exceed 35 mph, the system is a tropical storm and and is given a name.
As for global warmings effect on intensity according to the 2007 Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC-AR4), it is “more likely than not”, however it is not conclusive it is either.

Frequency: According to the IPCC-AR4, on a global scale, There is no clear trend in the annual numbers worldwide, ie; frequency of tropical cyclones. However, the frequency of tropical storms has increased dramatically in the North Atlantic. Reasons for this increase are now subject to debate among climatologists. At least two recent peer-reviewed scientific studies indicate a significant statistical link between the increased frequency and global warming, but research to identify a mechanism explaining this link is ongoing and unknown.

There is an average of about 90 tropical storms every year. This average changes very little over time and there has been no detectable change over the 20th century overall, although there is not good historical data for all regions where hurricanes occur.

A tornado is a violently rotating column of air which is in contact with both a cumulonimbus (or, in rare cases, a cumulus) cloud base and the surface of the earth. Tornadoes come in many sizes, but are typically in the form of a visible funnel, with the narrow end touching the earth. Often, a cloud of debris encircles the lower portion of the funnel.

The IPCC Fourth Assessment Report Summary for Policymakers clearly states:
"There is insufficient evidence to determine whether trends exist in the meridional overturning circulation of the global ocean or in small scale phenomena such as tornadoes, hail, lightning and dust-storms."
If there's no documented trend in tornadic activity at this point, then of course we cannot claim that climate change is directly affecting tornadoes. There may well be theoretical reasons for thinking that there would be an impact. In the absence of even a documented trend, much less a successful causal attribution, we need to be very cautious about how we discuss this subject.

. So to answer your question, global warming does not cause these phenomena but MAY cause an increase in them. Some is theoretical/academic thought some is more tangibly based. Global warming is a fairly new notion (in terms of research) but these storms have been here since the beginning. For each study which states unequivocably that global warming is the root cause for current trends another disagrees. It really depends on who is conducting the study and more importantly who is funding it.

Answer 2

Hurricanes don't cause global warming they are a result of global warming. Changing temperatures affect wind patterns. Heat rises, so warmed air rises creating a partial vacuum and other cooler air moves in to fill the space.

Answer 3

Other way around, friend.
Global warming, caused by natural phenomena and human errors and byproducts of industrial activity, if these alter the temperature of land of oceans or the ozone layer's protective capacities or the magnetic patterns of the Earth or anything else can alter the balance between land and sea, the configurations of climate and the relation between hot and cold areas. These phenomena determine the size and frequency of hurricanes and tornadoes and affect where they are experienced.

So it's the other way around: global warming affects the formation of tornadoes and hurricanes.

Answer 4

Not a cause, but a result. As global warming increases, so will the incidence of hurricanes and tornados.

Answer 5

No. Global warming causes them.