The American National Oceanic and Atmospheric Administration (NOAA) measures the

Question

The American National Oceanic and Atmospheric Administration (NOAA) measures the intensity of a hurricane season with the accumulated cyclone energy (ACE) index. The ACE for a season is the sum of the ACE for ech tropical storm with winds exceeding 35 knots (65 km/h). The maximum sustained winds (measured in knots) in the storm are measured or approximated every six hours. The values are squared and summed over the duration of the storm. The total is divided by 10,000, to make the parameter easier to use. ? This parameter is related to the energy of the storm, since kinetic energy is proportional to velocity squared. However, it does not take into account the size of the storm, which would be necessary for a true total energy estimate. Reliable storm data have been collected in the Atlantic Ocean since 1950, and are included in a file called ace.xlsx. Import this file into MATLAB using the command ace_data = xlsread('ACE.xlsx'); a) Import the data into MATLAB and name the array ace_data. b) Extract the data from each column into individual arrays. You should have arrays named a. years (column 1) (year of record) b. ace (column 2) (ACE Index) c. tropical_storms (column 3) (# of tropical storms) d. hurricanes (column 4) (# of hurricanes category 1

Explanation / Answer

Accumulated cyclone energy (ACE) is a measure used by the National Oceanic and Atmospheric Administration (NOAA) to express the activity of individual tropical cyclones and entire tropical cyclone seasons, particularly the North Atlantic hurricane season. It uses an approximation of the energy used by a tropical system over its lifetime and is calculated every six-hour period. The ACE of a season is the sum of the ACEs for each storm and takes into account the number, strength, and duration of all the tropical storms in the season.[1] Contents [hide] 1 Calculation 2 Atlantic basin ACE 2.1 Categories 2.2 Individual storms 2.3 Atlantic hurricane seasons by ACE index, 1950

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