{"id":51612,"date":"2025-06-24T15:07:43","date_gmt":"2025-06-24T09:37:43","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=51612"},"modified":"2025-06-25T11:41:31","modified_gmt":"2025-06-25T06:11:31","slug":"evaporative-demand","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/evaporative-demand\/","title":{"rendered":"Evaporative Demand"},"content":{"rendered":"<h2 style=\"text-align: justify;\"><b>Evaporative Demand Latest News<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The rising evaporative demand in India is exposing significant gaps in the country\u2019s climate data and research.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>About Evaporative Demand<\/b><\/h2>\n<ul>\n<li><span style=\"font-weight: 400;\">Evaporative demand is a <\/span><b>measure of how thirsty the atmosphere is.\u00a0<\/b><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\">It determines the <\/span><b>near-maximum of how much water will evaporate<\/b> <b>from a given piece of land if sufficient water is available.<\/b><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\">It does<\/span><b> not necessarily relate to actual evaporation rate<\/b><span style=\"font-weight: 400;\">, as if there is little water supply there can only be a small evaporation rate, no matter how large the demand.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">It is <\/span><b>driven by atmospheric factor<\/b><span style=\"font-weight: 400;\">s including <\/span><b>temperature, wind speed, humidity and cloud cover.<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Periods of <\/span><b>high evaporative demand<\/b><span style=\"font-weight: 400;\"> are connected to <\/span><b>droughts and increased fire danger.<\/b><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\">Tracking extended periods with above normal evaporative demand can be a useful way to detect drought onset, drought intensification, and elevated fire danger.\u00a0<\/span><\/li>\n<li><b>Above normal temperatures, clear skies, and wind speed, and below normal humidity<\/b><span style=\"font-weight: 400;\"> all <\/span><b>drive evaporative demand up<\/b><span style=\"font-weight: 400;\"> and lead to quicker drying at the surface.\u00a0<\/span><\/li>\n<li><b>Soil moisture is reduced<\/b><span style=\"font-weight: 400;\"> which leads to less water available for plants and v<\/span><b>egetation becomes stressed and more flammable.\u00a0<\/b><\/li>\n<li><span style=\"font-weight: 400;\">When extended periods of below normal precipitation overlap with extended periods of above normal evaporative demand fuels become critically dry favoring rapidly spreading wildfires.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>What is a Thirstwave?<\/b><\/h2>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It denotes<\/span><b> three or more contiguous days of intense evaporative demand.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">While heat waves are caused by particular temperature and wind patterns, a thirstwave is the<\/span><b> product of temperature, humidity, solar radiation, and wind speed.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When temperatures rise, the consequences include more heat as well as the mechanics of water exchange between land and atmosphere, which in turn alters humidity, wind, and solar radiation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b style=\"font-size: inherit;\">In a warming world,<\/b><span style=\"font-weight: 400;\"> the researchers found that <\/span><b style=\"font-size: inherit;\">thirstwaves have grown more intense, <\/b><span style=\"font-weight: 400;\">are more <\/span><b style=\"font-size: inherit;\">frequent, and are lasting longer.<\/b><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>Source:<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><a href=\"https:\/\/www.thehindu.com\/sci-tech\/energy-and-environment\/rising-evaporative-demand-spotlights-indias-data-and-research-gap\/article69728191.ece\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">TH<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Evaporative demand determines the near-maximum of how much water will evaporate from a given piece of land if sufficient water is available.<\/p>\n","protected":false},"author":23,"featured_media":51688,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[1006,21,22,23],"class_list":{"0":"post-51612","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-evaporative-demand","9":"tag-prelims-pointers","10":"tag-upsc-current-affairs","11":"tag-upsc-prelims-current-affairs","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/51612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=51612"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/51612\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/51688"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=51612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=51612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=51612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}