{"id":28538,"date":"2019-07-17T18:34:00","date_gmt":"2019-07-17T11:34:00","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=28538"},"modified":"2021-10-03T18:35:01","modified_gmt":"2021-10-03T11:35:01","slug":"cac-dai-duong-tren-the-gioi-am-len-nhung-giau-oxy-trong-tuong-lai","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/cac-dai-duong-tren-the-gioi-am-len-nhung-giau-oxy-trong-tuong-lai\/","title":{"rendered":"C\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng tr\u00ean th\u1ebf gi\u1edbi \u1ea5m l\u00ean nh\u01b0ng gi\u00e0u oxy trong t\u01b0\u01a1ng lai"},"content":{"rendered":"\n<p>Nhi\u1ec1u nghi\u00ean c\u1ee9u d\u1ef1a v\u00e0o s\u1ed1 li\u1ec7u \u0111o tr\u1ef1c ti\u1ebfp trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng \u0111ang m\u1ea5t oxy. V\u00ec n\u01b0\u1edbc c\u00f3 th\u1ec3 h\u00f2a tan \u00edt oxy h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, n\u00ean c\u00e1c k\u1ebft qu\u1ea3 n\u00e0y kh\u00f4ng g\u00e2y ng\u1ea1c nhi\u00ean. Ngo\u00e0i n\u00f3ng l\u00ean to\u00e0n c\u1ea7u, c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 t\u00ecnh tr\u1ea1ng ph\u00fa d\u01b0\u1ee1ng c\u1ee7a c\u00e1c v\u00f9ng ven bi\u1ec3n c\u0169ng g\u00f3p ph\u1ea7n v\u00e0o qu\u00e1 tr\u00ecnh kh\u1eed oxy \u0111ang di\u1ec5n ra.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.vista.gov.vn\/vn-uploads\/news\/2019_7\/7_9.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Li\u1ec7u c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng c\u00f3 c\u1ea1n ki\u1ec7t ho\u00e0n to\u00e0n oxy t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m n\u00e0o \u0111\u00f3 trong t\u01b0\u01a1ng lai n\u1ebfu xu h\u01b0\u1edbng n\u00f3ng l\u00ean to\u00e0n c\u1ea7u v\u1eabn ti\u1ebfp di\u1ec5n? C\u00e1c giai \u0111o\u1ea1n thi\u1ebfu oxy th\u1ef1c s\u1ef1 \u0111\u00e3 xu\u1ea5t hi\u1ec7n nhi\u1ec1u l\u1ea7n trong l\u1ecbch s\u1eed Tr\u00e1i \u0111\u1ea5t, c\u00f9ng v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng h\u00e0ng lo\u1ea1t. Trong c\u00e1c giai \u0111o\u1ea1n \u0111\u00f3 c\u00f3 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a n\u1ed3ng \u0111\u1ed9 CO2 cao trong kh\u00ed quy\u1ec3n v\u00e0 nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u t\u0103ng.<\/p>\n\n\n\n<p>M\u1edbi \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ea1i Trung t\u00e2m nghi\u00ean c\u1ee9u \u0111\u1ea1i d\u01b0\u01a1ng GEOMAR Helmholtz \u0111\u00e3 c\u00f4ng b\u1ed1 c\u00e1c m\u00f4 ph\u1ecfng m\u00f4 h\u00ecnh s\u1ef1 gia t\u0103ng h\u00e0m l\u01b0\u1ee3ng oxy trong c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng \u0111\u1ebfn n\u0103m 8000 tr\u00ean t\u1ea1p ch\u00ed qu\u1ed1c t\u1ebf&nbsp;<em>Nature Communications<\/em>. Trong k\u1ecbch b\u1ea3n \u0111\u00f3, gi\u1ea3 thuy\u1ebft \u0111\u01b0\u1ee3c \u0111\u01b0a ra l\u00e0 ph\u1ea7n l\u1edbn t\u00e0i nguy\u00ean h\u00f3a th\u1ea1ch s\u1ebd b\u1ecb \u0111\u1ed1t ch\u00e1y, l\u01b0\u1ee3ng kh\u00ed th\u1ea3i sinh ra s\u1ebd ti\u1ebfp t\u1ee5c t\u0103ng l\u00ean v\u00e0o cu\u1ed1i th\u1ebf k\u1ef7 n\u00e0y v\u00e0 sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng ng\u01b0\u1ee1ng 0 v\u00e0o n\u0103m 2300. Trong m\u00f4 h\u00ecnh, nhi\u1ec7t \u0111\u1ed9 h\u00e0nh tinh t\u0103ng th\u00eam 6 \u0111\u1ed9 C v\u00e0 duy tr\u00ec \u1edf m\u1ee9c cao \u0111\u00f3 cho \u0111\u1ebfn khi k\u1ebft th\u00fac m\u00f4 ph\u1ecfng.<\/p>\n\n\n\n<p>K\u1ebft qu\u1ea3 \u0111\u00e1ng ng\u1ea1c nhi\u00ean li\u00ean quan \u0111\u1ebfn h\u00e0m l\u01b0\u1ee3ng oxy c\u1ee7a \u0111\u1ea1i d\u01b0\u01a1ng: Sau khi gi\u1ea3m trong v\u00f2ng v\u00e0i tr\u0103m n\u0103m, l\u01b0\u1ee3ng oxy c\u1ee7a \u0111\u1ea1i d\u01b0\u01a1ng t\u0103ng tr\u1edf l\u1ea1i v\u00e0 th\u1eadm ch\u00ed \u0111\u1ea1t m\u1ee9c cao h\u01a1n tr\u01b0\u1edbc th\u1eddi k\u1ef3 c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ec9 trong v\u00f2ng g\u1ea7n 4000 n\u0103m. Tho\u1ea1t nh\u00ecn s\u1ebd th\u1ea5y ngh\u1ecbch l\u00fd l\u00e0 d\u00f9 theo d\u1ef1 b\u00e1o c\u00e1c v\u00f9ng thi\u1ebfu oxy hi\u1ec7n c\u00f3 trong c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng tr\u00ean th\u1ebf gi\u1edbi s\u1ebd m\u1edf r\u1ed9ng, nh\u01b0ng m\u00f4 h\u00ecnh n\u00e0y l\u1ea1i l\u00e0m t\u0103ng l\u01b0\u1ee3ng oxy m\u1ed9t c\u00e1ch b\u1ea5t ng\u1edd khi nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u t\u0103ng.<\/p>\n\n\n\n<p>K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra c\u1ee7a Trung t\u00e2m nghi\u00ean c\u1ee9u h\u1ee3p t\u00e1c Kiel 754 cho th\u1ea5y c\u00e1c khu v\u1ef1c ngh\u00e8o oxy l\u00e0 nh\u1eefng v\u00f9ng ch\u1ebft g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c sinh v\u1eadt c\u1ee1 l\u1edbn nh\u01b0 c\u00e1 ho\u1eb7c \u0111\u1ed9ng v\u1eadt ch\u00e2n \u0111\u1ea7u. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 vi khu\u1ea9n nh\u1ea5t \u0111\u1ecbnh h\u00edt th\u1edf nitrat thay cho oxy l\u1ea1i sinh tr\u01b0\u1edfng r\u1ea5t t\u1ed1t \u1edf \u0111\u00f3. GS. Oschlies, \u0111\u1ed3ng t\u00e1c gi\u1ea3 nghi\u00ean c\u1ee9u gi\u1ea3i th\u00edch: &#8220;<em>M\u1ed9t s\u1ed1 vi khu\u1ea9n l\u1ea5y n\u0103ng l\u01b0\u1ee3ng t\u1eeb qu\u00e1 tr\u00ecnh h\u00f3a h\u1ecdc m\u00e0 ch\u00fang ta g\u1ecdi l\u00e0 kh\u1eed nitrat. \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a chu tr\u00ecnh nit\u01a1, d\u1eabn \u0111\u1ebfn oxy \u0111\u01b0\u1ee3c ti\u00eau th\u1ee5 trong qu\u00e1 tr\u00ecnh h\u00f4 h\u1ea5p c\u1ee7a v\u1eadt ch\u1ea5t h\u1eefu c\u01a1 \u00edt h\u01a1n so v\u1edbi qu\u00e1 tr\u00ecnh quang h\u1ee3p<\/em>&#8220;.<\/p>\n\n\n\n<p>Trong m\u00f4 ph\u1ecfng m\u00f4 h\u00ecnh m\u1edbi, l\u1ea7n \u0111\u1ea7u ti\u00ean c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 li\u00ean t\u1ee5c k\u1ebft h\u1ee3p chu tr\u00ecnh oxy v\u1edbi chu tr\u00ecnh nit\u01a1 trong c\u00e1c m\u00f4 ph\u1ecfng to\u00e0n c\u1ea7u d\u00e0i h\u1ea1n. C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u nh\u1eadn th\u1ea5y do c\u00e1c v\u00f9ng thi\u1ebfu oxy \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng, n\u00ean ng\u00e0y c\u00e0ng c\u00f3 nhi\u1ec1u v\u1eadt ch\u1ea5t h\u1eefu c\u01a1 kh\u00f4ng \u0111\u01b0\u1ee3c h\u00f4 h\u1ea5p b\u1eb1ng oxy m\u00e0 thay th\u1ebf b\u1eb1ng nitrat th\u00f4ng qua qu\u00e1 tr\u00ecnh kh\u1eed nitrat.<\/p>\n\n\n\n<p>Sau v\u00e0i ngh\u00ecn n\u0103m, l\u01b0\u1ee3ng oxy kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ebfn s\u1ebd nhi\u1ec1u h\u01a1n l\u01b0\u1ee3ng oxy m\u1ea5t \u0111i trong c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng do n\u00f3ng l\u00ean to\u00e0n c\u1ea7u. Tuy nhi\u00ean, v\u1ea5n \u0111\u1ec1 m\u1edbi n\u1ea3y sinh l\u00e0: c\u00e1c giai \u0111o\u1ea1n thi\u1ebfu oxy \u0111\u00e3 t\u1eebng x\u1ea3y ra trong l\u1ecbch s\u1eed Tr\u00e1i \u0111\u1ea5t trong \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u1eadu \u1ea5m \u00e1p th\u1eadm ch\u00ed kh\u00f3 gi\u1ea3i th\u00edch h\u01a1n b\u1eb1ng nh\u1eefng ph\u00e1t hi\u1ec7n m\u1edbi. R\u00f5 r\u00e0ng c\u00f3 c\u00e1c y\u1ebfu t\u1ed1 v\u00e0 qu\u00e1 tr\u00ecnh ph\u1ea3n h\u1ed3i trong c\u00e1c t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p gi\u1eefa c\u00e1c qu\u00e1 tr\u00ecnh sinh h\u1ecdc, v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc d\u01b0\u1edbi \u0111\u1ea1i d\u01b0\u01a1ng v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7.<\/p>\n\n\n\n<p>N\u00f3i v\u1ec1 \u00fd ngh\u0129a c\u1ee7a nghi\u00ean c\u1ee9u, Andreas Oschlies, m\u1ed9t trong c\u00e1c t\u00e1c gi\u1ea3 nghi\u00ean c\u1ee9u cho r\u1eb1ng: &#8220;<em>\u0110\u00e2y l\u00e0 l\u00fd do nghi\u00ean c\u1ee9u n\u00e0y c\u0169ng quan tr\u1ecdng v\u00e0o th\u1eddi \u0111i\u1ec3m hi\u1ec7n nay. Nghi\u00ean c\u1ee9u ch\u1ec9 ra nh\u1eefng l\u1ed7 h\u1ed5ng ki\u1ebfn \u200b\u200bth\u1ee9c nh\u01b0 s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa kh\u1eed nit\u01a1 v\u00e0 c\u1ed1 \u0111\u1ecbnh \u0111\u1ea1m, c\u0169ng c\u00f3 th\u1ec3 c\u00f3 li\u00ean quan \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i \u0111ang di\u1ec5n ra d\u01b0\u1edbi \u0111\u1ea1i d\u01b0\u01a1ng<\/em>&#8220;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nhi\u1ec1u nghi\u00ean c\u1ee9u d\u1ef1a v\u00e0o s\u1ed1 li\u1ec7u \u0111o tr\u1ef1c ti\u1ebfp trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng c\u00e1c \u0111\u1ea1i d\u01b0\u01a1ng \u0111ang m\u1ea5t oxy. V\u00ec n\u01b0\u1edbc c\u00f3 th\u1ec3 h\u00f2a tan \u00edt oxy h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, n\u00ean c\u00e1c k\u1ebft qu\u1ea3 n\u00e0y kh\u00f4ng g\u00e2y ng\u1ea1c nhi\u00ean. Ngo\u00e0i n\u00f3ng l\u00ean to\u00e0n c\u1ea7u, c\u00e1c y\u1ebfu t\u1ed1 [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28538","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28538"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28538\/revisions"}],"predecessor-version":[{"id":28539,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28538\/revisions\/28539"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}