![\"\u1ea2nh](\"https:\/\/i1-vnexpress.vnecdn.net\/2020\/10\/07\/VNE-NASA-JPG-6456-1602067490.jpg?w=680&h=0&q=100&dpr=1&fit=crop&s=wVNA12ze8ns8lvXCq8H2ew\")
S\u01b0\u1eddn n\u00fai c\u00f3 nguy c\u01a1 cao n\u1eb1m ph\u00eda tr\u00ean v\u1ecbnh nh\u1ecf t\u00ean Barry Arm \u1edf ven bi\u1ec3n ph\u00eda nam Alaska, n\u1eb1m c\u00e1ch Anchorage 97 km v\u1ec1 ph\u00eda \u0111\u00f4ng. S\u01b0\u1eddn n\u00fai n\u00e0y \u0111\u01b0\u1ee3c ch\u1ed1ng \u0111\u1ee1 m\u1ed9t ph\u1ea7n b\u1edfi s\u00f4ng b\u0103ng Barry. Nh\u01b0ng s\u00f4ng b\u0103ng \u0111\u00e3 thu h\u1eb9p \u0111\u00e1ng k\u1ec3 trong th\u1eadp k\u1ef7 qua, khi\u1ebfn s\u01b0\u1eddn n\u00fai tr\u1edf n\u00ean b\u1ea5t \u1ed5n, theo th\u00f4ng b\u00e1o c\u1ee7a nh\u00f3m nghi\u00ean c\u1ee9u g\u1ed3m 14 nh\u00e0 khoa h\u1ecdc tr\u00ean website c\u1ee7a C\u01a1 quan T\u00e0i nguy\u00ean Thi\u00ean nhi\u00ean Alaska.<\/p>\n\n\n\n
S\u1ef1 thu h\u1eb9p c\u1ee7a s\u00f4ng b\u0103ng t\u1ea1o ra \u0111i\u1ec1u ki\u1ec7n ho\u00e0n h\u1ea3o \u0111\u1ec3 s\u01b0\u1eddn n\u00fai v\u1ed1n \u0111ang d\u1ecbch chuy\u1ec3n ch\u1eadm r\u00e3i xu\u1ed1ng d\u1ed1c, s\u1ee5p \u0111\u1ed5 \u0111\u1ed9t ng\u1ed9t, t\u1ea1o l\u1edf \u0111\u1ea5t c\u00f3 kh\u1ea3 n\u0103ng s\u1ea3n sinh s\u00f3ng th\u1ea7n c\u1ef1c m\u1ea1nh cao h\u00e0ng tr\u0103m m\u00e9t d\u1ecdc b\u1edd bi\u1ec3n v\u1ecbnh Barry Arm v\u00e0 v\u1ecbnh Harriman c\u1ea1nh \u0111\u00f3. Trong khi th\u1eddi gian di\u1ec5n ra th\u1ea3m h\u1ecda nh\u01b0 v\u1eady r\u1ea5t kh\u00f3 d\u1ef1 \u0111o\u00e1n ch\u00ednh x\u00e1c, c\u00e1c nh\u00e0 khoa h\u1ecdc \u01b0\u1edbc t\u00ednh n\u00f3 ch\u1eafc ch\u1eafn s\u1ebd x\u1ea3y ra trong v\u00f2ng 20 n\u0103m t\u1edbi.<\/p>\n\n\n\n
Chunli Dai, nh\u00e0 khoa h\u1ecdc \u1edf \u0110\u1ea1i h\u1ecdc Ohio, th\u00e0nh vi\u00ean nh\u00f3m nghi\u00ean c\u1ee9u, s\u1eed d\u1ee5ng \u1ea3nh v\u1ec7 tinh trong ch\u01b0\u01a1ng tr\u00ecnh Lansat do NASA v\u00e0 C\u1ee5c Kh\u1ea3o s\u00e1t \u0110\u1ecba ch\u1ea5t M\u1ef9 \u0111\u1ed3ng qu\u1ea3n l\u00fd \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy c\u01a1 t\u1eeb s\u01b0\u1eddn n\u00fai ph\u00eda tr\u00ean v\u1ecbnh Barry Arm. “Nh\u1edd t\u1ea7m quan s\u00e1t r\u1ed9ng t\u1eeb v\u1ec7 tinh Landsat, ch\u00fang t\u00f4i kh\u00f4ng b\u1ecf s\u00f3t s\u1ef1 d\u1ecbch chuy\u1ec3n c\u1ee7a s\u01b0\u1eddn n\u00fai. B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u1ea3 v\u00f9ng n\u00fai gi\u1eefa s\u00f4ng b\u0103ng Cascade v\u00e0 s\u00f4ng b\u0103ng Barry s\u1ee5t d\u1ea7n xu\u1ed1ng n\u01b0\u1edbc”, Dai cho bi\u1ebft.<\/p>\n\n\n\n
T\u1eeb n\u0103m 2010 \u0111\u1ebfn n\u0103m 2017, s\u01b0\u1eddn n\u00fai di chuy\u1ec3n v\u1ec1 ph\u00eda tr\u01b0\u1edbc kho\u1ea3ng 122 m, d\u00f9 trong 3 n\u0103m qua, n\u00f3 ch\u1ec9 x\u00ea d\u1ecbch nh\u1eb9. Khi so s\u00e1nh \u1ea3nh ch\u1ee5p c\u1ee7a v\u1ec7 tinh Landsat trong n\u0103m 2013 v\u00e0 2019 do \u0110\u00e0i quan s\u00e1t Tr\u00e1i \u0110\u1ea5t c\u1ee7a NASA chia s\u1ebb, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u quan s\u00e1t th\u1ea5y s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t \u0111\u01b0\u1eddng d\u1ed1c do s\u1ea1t l\u1edf \u0111\u1ea5t ch\u1eadm h\u1eb1n l\u00ean s\u01b0\u1eddn n\u00fai. Khu v\u1ef1c n\u00e0y c\u00f3 m\u00e0u s\u1eafc s\u00e1ng h\u01a1n so v\u1edbi nh\u1eefng v\u00f9ng xung quanh trong \u1ea3nh, gi\u00fap \u0111\u00e1nh d\u1ea5u m\u00e9p c\u1ee7a s\u01b0\u1eddn n\u00fai k\u00e9m \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n
Theo nh\u00f3m nghi\u00ean c\u1ee9u, s\u01b0\u1eddn n\u00fai b\u1eaft \u0111\u1ea7u di chuy\u1ec3n xu\u1ed1ng d\u1ed1c c\u00e1ch \u0111\u00e2y 50 n\u0103m, nh\u01b0ng t\u1ed1c \u0111\u1ed9 c\u1ee7a qu\u00e1 tr\u00ecnh t\u0103ng nhanh trong kho\u1ea3ng n\u0103m 2009 – 2015, khi r\u00eca tr\u01b0\u1edbc c\u1ee7a s\u00f4ng b\u0103ng Barry thu h\u1eb9p d\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng c\u1ee7a bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu.<\/p>\n\n\n\n