\u00c7o\u011fumuz diazot monoksit maddesini, anestezi s\u0131ras\u0131nda da kullan\u0131lan “g\u00fcld\u00fcren gaz” olarak tan\u0131yoruz. Ancak diazot monoksit (N2O) asl\u0131nda karbondioksit ve metandan sonra gelen en g\u00fc\u00e7l\u00fc etkiye sahip sera gaz\u0131d\u0131r. Bu hafta raporla\u015ft\u0131r\u0131lan yeni bir \u00e7al\u0131\u015fmaya g\u00f6re bu gaz, ayn\u0131 zamanda, ozon tabakas\u0131na zarar veren maddelerin ba\u015f\u0131nda geliyor.<\/p>\n
Norve\u00e7 Hava Ara\u015ft\u0131rmalar\u0131 Enstit\u00fcs\u00fc’nden bir biliminsan\u0131 olan Rona L. Thompson, \u201cBu gaz\u0131n emisyonlar\u0131n\u0131n son yirmi y\u0131lda, \u00f6zellikle de 2009’dan itibaren \u00f6nemli \u00f6l\u00e7\u00fcde artt\u0131\u011f\u0131n\u0131 g\u00f6r\u00fcyoruz\u201d dedi ve ekledi: “\u00c7al\u0131\u015fmalar bu gaz\u0131n sal\u0131n\u0131m\u0131n\u0131n tahmin edilenden daha h\u0131zl\u0131 artt\u0131\u011f\u0131n\u0131 g\u00f6steriyor.”<\/p>\n
Azotlu g\u00fcbrelerin kullan\u0131m\u0131n\u0131n artt\u0131r\u0131lmas\u0131, atmosferde daha y\u00fcksek azot oksit seviyelerinin g\u00f6zlenmesine yol a\u00e7maktad\u0131r. \u00c7al\u0131\u015fmada, Thompson ile Maryland \u00dcniversitesi \u00c7evre Bilimleri Merkezi’nden Eric Davidson ve \u00e7al\u0131\u015fma arka\u015flar\u0131, atmosferdeki diazot monoksidin 20. y\u00fczy\u0131l\u0131n ortalar\u0131ndan itibaren istikrarl\u0131 bir \u015fekilde artt\u0131\u011f\u0131n\u0131 g\u00f6zlemledi. 20. y\u00fczy\u0131l\u0131n ortalar\u0131ndan bu yana, azotlu g\u00fcbrelerin \u00fcretimi, azot i\u00e7eren mahsullerin (yonca, soya fasulyesi ve yer f\u0131st\u0131\u011f\u0131 gibi) yayg\u0131n bi\u00e7imde ekilmesi ve fosiller ile biyoyak\u0131t kullan\u0131m\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde artm\u0131\u015ft\u0131r. Konuya ili\u015fkin olarak a\u00e7\u0131klamalarda bulunan Thompson, \u201cArtan azot kullan\u0131m\u0131 \u00e7ok daha fazla g\u0131da \u00fcretmeyi m\u00fcmk\u00fcn k\u0131ld\u0131. Dezavantaj\u0131 elbette, atmosferdeki diazot monoksit seviyelerinin y\u00fckselmesi ve bu durumla ili\u015fkili \u00e7evresel problemler\u201d dedi.<\/p>\n
Biliminsanlar\u0131, 2000-2005 ve 2010-2015 y\u0131llar\u0131 aras\u0131nda k\u00fcresel olarak diazot monoksit emisyonlar\u0131n\u0131n yakla\u015f\u0131k y\u00fczde 10 y\u00fckseldi\u011fini tespit etmi\u015flerdir. Bu, beklenen miktar\u0131n yakla\u015f\u0131k olarak iki kat\u0131d\u0131r.<\/p>\n
Maryland \u00dcniversitesi \u00c7evre Bilimleri Merkezi’nden Eric Davidson, “Bu yeni yay\u0131n hem sera gaz\u0131 emisyonlar\u0131 sorununu nas\u0131l \u00e7\u00f6zebilece\u011fimizi hem de d\u00fcnyan\u0131n baz\u0131 b\u00f6lgelerinde mevcut \u00e7abalar\u0131n nas\u0131l azald\u0131\u011f\u0131n\u0131 g\u00f6steriyor” dedi ve ekledi: \u201cBu emisyonlar temel olarak g\u0131da yeti\u015ftirmek i\u00e7in g\u00fcbre kullanmaktan ve hayvan s\u00fcr\u00fclerini artt\u0131rmaktan kaynaklan\u0131yor.”<\/p>\n
Biliminsanlar\u0131 son d\u00f6nemde bu gaz\u0131n sal\u0131n\u0131m\u0131n\u0131n azalt\u0131lmas\u0131na y\u00f6nelik yakla\u015f\u0131mdan bahsederek “Avrupa ve Kuzey Amerika’da, iklim de\u011fi\u015fikli\u011fine ve stratosferik ozon tabakas\u0131n\u0131n incelmesine \u00f6nemli bir etkide bulunan diazot monoksit emisyonlar\u0131ndaki art\u0131\u015f\u0131 bir \u00f6l\u00e7\u00fcde engellemeyi ba\u015fard\u0131k” dedi ve ekledi: “Ne yaz\u0131k ki, ayn\u0131 \u015fey g\u00fcbre kullan\u0131m\u0131n\u0131n, hayvanc\u0131l\u0131\u011f\u0131n yo\u011funla\u015fmas\u0131n\u0131n ve sonu\u00e7ta ortaya \u00e7\u0131kan diazot monoksit emisyonlar\u0131n\u0131n h\u0131zla artt\u0131\u011f\u0131 Asya ve G\u00fcney Amerika i\u00e7in s\u00f6ylenemez.”<\/p>\n
Kaynak:<\/strong> https:\/\/m.phys.org\/news\/2019-11-nitrous-oxide.html<\/p>\n","protected":false},"excerpt":{"rendered":" \u00c7o\u011fumuz diazot monoksit maddesini, anestezi s\u0131ras\u0131nda da kullan\u0131lan “g\u00fcld\u00fcren gaz” olarak tan\u0131yoruz. Ancak diazot monoksit (N2O) asl\u0131nda karbondioksit ve metandan sonra gelen en g\u00fc\u00e7l\u00fc etkiye sahip sera gaz\u0131d\u0131r. Bu hafta raporla\u015ft\u0131r\u0131lan yeni bir \u00e7al\u0131\u015fmaya g\u00f6re bu gaz, ayn\u0131 zamanda, ozon tabakas\u0131na zarar veren maddelerin ba\u015f\u0131nda geliyor. Norve\u00e7 Hava Ara\u015ft\u0131rmalar\u0131 Enstit\u00fcs\u00fc’nden bir biliminsan\u0131 olan Rona L. […]<\/p>\n","protected":false},"author":1390,"featured_media":38400,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[5560,5561,1188,4735],"class_list":["post-38397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","tag-diazot-monoksit","tag-hayvancilik","tag-ozon-tabakasi","tag-sera-gazi-salinimi"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t