The difference between the reference and a sample is that the concentration of the measurable substance in the reference solution is zero. The reference tube transmits as much light as is possible with the solution you are using.
Rate this Article: The Saffir-Simpson Hurricane Scale is a 1-5 rating based on the hurricane's present intensity. This hurricane scale is used to give an estimate of the potential property damage and flooding expected along the coast from a hurricane landfall. Wind speed is the determining factor in the scale, as storm surge values are highly dependent on the slope of the continental shelf in the landfall region. Wind speeds are measured using a 1-minute average. Note:The Saffir-Simpson Hurricane Wind Scale (SSHWS) was updated in 2012 to accomodate number rounding issues.
The ACE index is used to calculate the intensity of the hurricane season and is a function of the wind speed and duration of each tropical cyclone. The 2013 Atlantic hurricane season had an approximate ACE of 33 (x10 4 knots 2) which was well below the 1981-2010 average value of 104 (x10 4 knots 2).he ACE index for the season was 66 (x10 4 knots 2), which is below the 1981-2010 average of 132 (x10 4 knots 2). The below-average number of major hurricanes in the basin kept the ACE low for 2013.