{"id":5304,"date":"2014-08-29T23:18:50","date_gmt":"2014-08-29T23:18:50","guid":{"rendered":"http:\/\/www.oracletutoring.ca\/blog\/?p=5304"},"modified":"2018-03-01T20:10:21","modified_gmt":"2018-03-01T20:10:21","slug":"humidex-a-canadian-invention","status":"publish","type":"post","link":"https:\/\/www.oracletutoring.ca\/blog\/humidex-a-canadian-invention\/","title":{"rendered":"Humidex: a Canadian invention"},"content":{"rendered":"

The tutor enjoys discussing scientific concepts, particularly ones with a Canadian dimension.<\/h1>\n

The humidex provides a meaningful measure of a day’s heat. By considering dew point and temperature together, it provides an “effective temperature” that suggests the comfort level of the conditions. The “effective temperature” is referred to as “the humidex”.<\/p>\n

The humidex is calculated as follows:<\/p>\n

H=T+0.5555(6.11e^(5418*(1\/273-1\/dewpoint))-10)<\/p>\n

where T is in Celsius, while dewpoint is, importantly, in Kelvin. To get Kelvin, you add 273 to the Celsius temperature. Therefore, a dew point of 20C is 293 K.<\/p>\n

I have verified the formula using the following data set:<\/p>\n\n\n\n\n
temp (\u00b0C)<\/td>\ndewpoint (\u00b0C)<\/td>\nhumidex<\/td>\nsource<\/td>\n<\/tr>\n
30<\/td>\n25<\/td>\n42<\/td>\nWikipedia<\/a><\/td>\n<\/tr>\n
28<\/td>\n20<\/td>\n36<\/td>\nPlanetcalc: Humidex<\/a><\/td>\n<\/tr>\n<\/table>\n

When the dewpoint is 10C (283K) or less, the humidex is virtually the same as the Celsius temperature. For day-to-day life in Canada, it’s only on hot summer days, when the dew point can rise into the high teens or above, that the humidex becomes important.<\/p>\n

Today’s humidex formula comes from J.M. Masterton and F.A. Richardson, Canada’s Atmospheric Environment Service, 1979. However, the humidex was first used in 1965, possibly with a different formula.<\/p>\n

Source: csgnetwork.com<\/a><\/p>\n

Jack of Oracle Tutoring by Jack and Diane,<\/a> Campbell River, BC.<\/p>\n","protected":false},"excerpt":{"rendered":"

The tutor enjoys discussing scientific concepts, particularly ones with a Canadian dimension. The humidex provides a meaningful measure of a day’s heat. By considering dew point and temperature together, it provides an “effective temperature” that suggests the comfort level of …<\/p>\n

Humidex: a Canadian invention<\/span> Read More »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[213],"tags":[214],"class_list":["post-5304","post","type-post","status-publish","format-standard","hentry","category-weather","tag-humidex"],"_links":{"self":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/5304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/comments?post=5304"}],"version-history":[{"count":31,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/5304\/revisions"}],"predecessor-version":[{"id":30663,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/posts\/5304\/revisions\/30663"}],"wp:attachment":[{"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/media?parent=5304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/categories?post=5304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oracletutoring.ca\/blog\/wp-json\/wp\/v2\/tags?post=5304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}