Tropical cyclone scales barometric pressure is low compared with its surroundings. Other classifications historically used include: cyclonic storm where the winds did not exceed force 10 on the Beaufort scale and a Cyclone where the winds are either force 11 and 12 on the Beaufort scale. Between 1924 and 1988, tropical cyclones were classified into four categories: depression, deep depression, cyclonic storms and severe cyclonic storms. However, a change was made during 1988 to introduce the category "severe cyclonic storm with core of hurricane winds" for tropical cyclones, with wind speeds of more than . During 1999 the categories Very Severe Cyclonic Storm
Moratorium on commercial fishing of the Beaufort Sea Moratorium on commercial fishing of the Beaufort Sea On August 20 2009 United States Secretary of Commerce Gary Locke announced a moratorium on fishing the Beaufort Sea north of Alaska. According to Locke: There is no widespread commercial fisheries in those waters now. The moratorium was imposed in anticipation that global warming would make those waters accessible to commercial fisheries. The moratorium stirred controversy in Canada because the region where the USA announced the moratorium included a large wedge-shaped region of disputed waters. Randy Boswell, of "Canada.com" wrote that the disputed area covered a section of the Beaufort Sea. He