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.
Sea surface temperatureâthe average temperature of water at the surface of the global oceanâis a key indicator of the ocean's staus. Because the ocean is constantly interacting with the atmosphere, changes in sea surface temperature can have profound effects on other aspects of Earth's climate.rom 2011-2012, as a weak La Nina niÃ±a transitioned to more neutral, conditions average sea surface temperature for the global ocean warmed by about.0 1Âº. celsius