{"id":3364,"date":"2019-08-30T12:52:38","date_gmt":"2019-08-30T12:52:38","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=3364"},"modified":"2019-08-30T12:52:38","modified_gmt":"2019-08-30T12:52:38","slug":"soot-and-the-dinosaur-extinction","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/vi\/science\/earth-science\/soot-and-the-dinosaur-extinction\/","title":{"rendered":"Vai tr\u00f2 c\u1ee7a mu\u1ed9i than trong s\u1ef1 tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long"},"content":{"rendered":"

Vai tr\u00f2 c\u1ee7a b\u1ed3 h\u00f3ng trong s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long<\/h2>\n\n

Va ch\u1ea1m di\u1ec7t vong kh\u1ee7ng long<\/h2>\n\n

S\u00e1u m\u01b0\u01a1i s\u00e1u tri\u1ec7u n\u0103m tr\u01b0\u1edbc, m\u1ed9t thi\u00ean th\u1ec3 \u0111\u00e3 \u0111\u00e2m v\u00e0o Tr\u00e1i \u0111\u1ea5t, t\u1ea1o n\u00ean h\u1ed1 va ch\u1ea1m Chicxulub \u1edf Mexico. V\u1ee5 va ch\u1ea1m \u0111\u00e3 g\u00e2y ra m\u1ed9t lo\u1ea1t c\u00e1c s\u1ef1 ki\u1ec7n th\u1ea3m kh\u1ed1c, bao g\u1ed3m s\u00f3ng th\u1ea7n, \u0111\u1ed9ng \u0111\u1ea5t v\u00e0 ch\u00e1y r\u1eebng.<\/p>\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng l\u00ean \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi<\/h2>\n\n

M\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t trong s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long l\u00e0 b\u1ed3 h\u00f3ng do c\u00e1c \u0111\u00e1m ch\u00e1y do va ch\u1ea1m t\u1ea1o ra. B\u1ed3 h\u00f3ng l\u00e0 m\u1ed9t h\u1ea1t carbon m\u00e0u \u0111en h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi, ng\u0103n c\u1ea3n \u00e1nh s\u00e1ng n\u00e0y \u0111\u1ebfn \u0111\u01b0\u1ee3c b\u1ec1 m\u1eb7t Tr\u00e1i \u0111\u1ea5t.<\/p>\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ebfn h\u1ec7 sinh th\u00e1i bi\u1ec3n<\/h2>\n\n

B\u1ed3 h\u00f3ng t\u1eeb c\u00e1c \u0111\u00e1m ch\u00e1y \u0111\u00e3 c\u00f3 t\u00e1c \u0111\u1ed9ng t\u00e0n ph\u00e1 \u0111\u1ebfn c\u00e1c h\u1ec7 sinh th\u00e1i bi\u1ec3n. C\u00e1c h\u1ea1t b\u1ed3 h\u00f3ng l\u01b0u l\u1ea1i trong kh\u00ed quy\u1ec3n g\u1ea7n hai n\u0103m, ch\u1eb7n h\u1ea7u h\u1ebft \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0 ng\u0103n c\u1ea3n qu\u00e1 tr\u00ecnh quang h\u1ee3p. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 s\u1ee5p \u0111\u1ed5 c\u1ee7a chu\u1ed7i th\u1ee9c \u0103n v\u00e0 s\u1ef1 tuy\u1ec7t ch\u1ee7ng c\u1ee7a nhi\u1ec1u sinh v\u1eadt bi\u1ec3n.<\/p>\n\n

C\u00e1c t\u00e1c \u0111\u1ed9ng l\u00e2u d\u00e0i c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi kh\u00ed quy\u1ec3n Tr\u00e1i \u0111\u1ea5t<\/h2>\n\n

B\u1ed3 h\u00f3ng t\u1eeb c\u00e1c \u0111\u00e1m ch\u00e1y c\u0169ng c\u00f3 t\u00e1c \u0111\u1ed9ng l\u00e2u d\u00e0i \u0111\u1ebfn kh\u00ed quy\u1ec3n Tr\u00e1i \u0111\u1ea5t. C\u00e1c h\u1ea1t b\u1ed3 h\u00f3ng l\u00e0m n\u00f3ng kh\u00ed quy\u1ec3n, khi\u1ebfn kh\u00ed quy\u1ec3n n\u00e0y n\u1edf ra v\u00e0 b\u1ed1c l\u00ean. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i v\u1ec1 ki\u1ec3u m\u1eabu l\u01b0u th\u00f4ng kh\u00ed quy\u1ec3n v\u00e0 l\u00e0m gi\u1ea3m l\u01b0\u1ee3ng m\u01b0a.<\/p>\n\n

C\u00e1c y\u1ebfu t\u1ed1 kh\u00ed h\u1eadu kh\u00e1c nhau g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long<\/h2>\n\n

Ngo\u00e0i b\u1ed3 h\u00f3ng, c\u00e1c y\u1ebfu t\u1ed1 kh\u00ed h\u1eadu kh\u00e1c c\u0169ng g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y bao g\u1ed3m b\u1ee5i, sunfat v\u00e0 nh\u1eefng thay \u0111\u1ed5i v\u1ec1 kh\u00ed nh\u00e0 k\u00ednh. C\u00e1c h\u1ea1t b\u1ee5i \u0111\u00e3 ch\u1eb7n \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0 g\u00e2y ra s\u1ef1 l\u1ea1nh \u0111i, trong khi c\u00e1c sunfat ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0 g\u00e2y ra s\u1ef1 \u1ea5m l\u00ean.<\/p>\n\n

Vai tr\u00f2 c\u1ee7a l\u1eeda sau v\u1ee5 va ch\u1ea1m di\u1ec7t vong kh\u1ee7ng long<\/h2>\n\n

Nh\u1eefng \u0111\u00e1m ch\u00e1y do va ch\u1ea1m g\u00e2y ra \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng sau s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng. C\u00e1c \u0111\u00e1m ch\u00e1y n\u00e0y \u0111\u00e3 gi\u1ea3i ph\u00f3ng m\u1ed9t l\u01b0\u1ee3ng l\u1edbn b\u1ed3 h\u00f3ng v\u00e0o kh\u00ed quy\u1ec3n, g\u00f3p ph\u1ea7n ch\u1eb7n \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0 l\u00e0m l\u1ea1nh Tr\u00e1i \u0111\u1ea5t.<\/p>\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u<\/h2>\n\n

C\u00e1c h\u1ea1t b\u1ed3 h\u00f3ng c\u0169ng c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 to\u00e0n c\u1ea7u. B\u1ed3 h\u00f3ng h\u1ea5p th\u1ee5 nhi\u1ec7t, l\u00e0m cho kh\u00ed quy\u1ec3n \u1ea5m l\u00ean. Hi\u1ec7u \u1ee9ng \u1ea5m l\u00ean n\u00e0y \u0111\u1eb7c bi\u1ec7t r\u00f5 r\u1ec7t tr\u00ean \u0111\u1ea5t li\u1ec1n, n\u01a1i nhi\u1ec7t \u0111\u1ed9 \u0111\u00e3 gi\u1ea3m g\u1ea7n 30 \u0111\u1ed9 C ch\u1ec9 trong ba n\u0103m.<\/p>\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ebfn ki\u1ec3u m\u1eabu l\u01b0\u1ee3ng m\u01b0a<\/h2>\n\n

B\u1ed3 h\u00f3ng t\u1eeb c\u00e1c \u0111\u00e1m ch\u00e1y c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ki\u1ec3u m\u1eabu l\u01b0\u1ee3ng m\u01b0a. C\u00e1c h\u1ea1t b\u1ed3 h\u00f3ng \u0111\u00e3 ch\u1eb7n \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi, l\u00e0m x\u00e1o tr\u1ed9n c\u00e1c ki\u1ec3u m\u1eabu l\u01b0u th\u00f4ng kh\u00ed quy\u1ec3n. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn l\u01b0\u1ee3ng m\u01b0a gi\u1ea3m, c\u00f3 th\u1ec3 g\u00e2y ra t\u00e1c \u0111\u1ed9ng t\u00e0n ph\u00e1 \u0111\u1ed1i v\u1edbi c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt hoang d\u00e3 v\u00e0o th\u1eddi k\u1ef3 Ph\u1ea5n tr\u1eafng.<\/p>\n\n

Nh\u1eefng th\u00e1ch th\u1ee9c trong vi\u1ec7c l\u1eadp m\u00f4 h\u00ecnh c\u00e1c t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi kh\u00ed h\u1eadu Tr\u00e1i \u0110\u1ea5t<\/h2>\n\n

Vi\u1ec7c l\u1eadp m\u00f4 h\u00ecnh c\u00e1c t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi kh\u00ed h\u1eadu Tr\u00e1i \u0111\u1ea5t l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 ph\u1ee9c t\u1ea1p. C\u00e1c h\u1ea1t b\u1ed3 h\u00f3ng t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c h\u1ea1t kh\u00ed quy\u1ec3n kh\u00e1c v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c h\u1ea1t.<\/p>\n\n

Nghi\u00ean c\u1ee9u trong t\u01b0\u01a1ng lai c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3u vai tr\u00f2 c\u1ee7a b\u1ed3 h\u00f3ng trong c\u00e1c s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng<\/h2>\n\n

C\u1ea7n nhi\u1ec1u nghi\u00ean c\u1ee9u h\u01a1n n\u1eefa \u0111\u1ec3 hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 vai tr\u00f2 c\u1ee7a b\u1ed3 h\u00f3ng trong c\u00e1c s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng. C\u00e1c nh\u00e0 khoa h\u1ecdc c\u1ea7n ph\u00e1t tri\u1ec3n c\u00e1c m\u00f4 h\u00ecnh ch\u00ednh x\u00e1c h\u01a1n \u0111\u1ec3 m\u00f4 ph\u1ecfng c\u00e1c t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi kh\u00ed h\u1eadu Tr\u00e1i \u0111\u1ea5t. H\u1ecd c\u0169ng c\u1ea7n nghi\u00ean c\u1ee9u t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed3 h\u00f3ng \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 sinh th\u00e1i v\u00e0 lo\u00e0i kh\u00e1c nhau. Nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1c r\u1ee7i ro m\u00e0 c\u00e1c s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng trong t\u01b0\u01a1ng lai g\u00e2y ra.<\/p>","protected":false},"excerpt":{"rendered":"

Vai tr\u00f2 c\u1ee7a b\u1ed3 h\u00f3ng trong s\u1ef1 ki\u1ec7n tuy\u1ec7t ch\u1ee7ng c\u1ee7a kh\u1ee7ng long Va ch\u1ea1m di\u1ec7t vong kh\u1ee7ng long S\u00e1u m\u01b0\u01a1i s\u00e1u tri\u1ec7u n\u0103m tr\u01b0\u1edbc, m\u1ed9t thi\u00ean th\u1ec3 \u0111\u00e3 \u0111\u00e2m…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[212],"tags":[34,137,207,134,6464,400],"class_list":["post-3364","post","type-post","status-publish","format-standard","hentry","category-earth-science","tag-climate-change","tag-paleontology","tag-geology","tag-dinosaurs","tag-soot","tag-extinction"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/3364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/comments?post=3364"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/3364\/revisions"}],"predecessor-version":[{"id":3365,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/3364\/revisions\/3365"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/media?parent=3364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/categories?post=3364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/tags?post=3364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}