But if you develop persistent muscle weakness, or muscle weakness with no apparent cause or normal explanation, it may be a sign of an underlying health problem. Voluntary muscle contractions are usually generated when your brain sends a signal through your spinal cord and nerves to a muscle.
Of these factors, only rising sea surface temperatures was found to influence hurricane intensity in a statistically significant way over a long-term basis. The other factors affected hurricane activity on short time scales only. rise in the world's sea surface temperatures was the primary contributor to the formation of stronger hurricanes since 1970, a new study reports.
Global Warming Causes Less Hurricanes. It is not just warm water which causes hurricanes. It is the temperature difference between the ocean surface and the upper atmosphere. The higher that temperature difference, the more hurricanes will form, and the stronger they will be. Global warming models all agree that the temperatures will rise more in the upper atmosphere than at the surface.