Video: Lub hav glaciers txav sai npaum li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txav mus los ntawm hav glaciers.
Dej khov ua tau txav ntau tshaj 15 meters ib hnub twg. Cov dej khov loj dua ntawm qhov chaw siab tshaj txav ntau sai sai tshaj cov dej khov rau ntawm qhov siab tshaj qhov siab tshaj qhov deb ntawm hav . Cov dynamics tso cai rau ib dej khov kom ntxiv cov dej khov uas ploj lawm hauv thaj tsam ntawm kev puas tsuaj
Kuj nug tias, cov glaciers feem ntau txav ceev npaum li cas?
Dej khov tsab ntawv tsa suab tuaj yeem yog ceev (txog 30 m / hnub, pom ntawm Jakobshavn Isbræ hauv Greenland) lossis qeeb (0.5 m / xyoo ntawm me me dej khov los yog nyob rau hauv nruab nrab ntawm cov nplooj ntawv dej khov), tab sis yog feem ntau txog 25 cm / hnub.
Ib yam li ntawd, koj puas tuaj yeem pom cov dej khov txav? Yog tiag saib ib tug glacier txav , koj thawj zaug yuav tsum ceev kom dhau lub sij hawm. Cov dej khov glides raws hauv av thiab ntim cov daus thiab dej khov maj mam hloov, tsis pom rau tib neeg qhov muag. Peb paub tias lawv txav mus , txawm li cas los. Dej khov yog cov blocks loj ntawm compressed daus thiab dej khov uas ua tau ua mais ntev, dav thiab tob.
Ua li no, glaciers txav ceev tshaj qhov twg?
Dej Flow: Glaciers txav los ntawm sab hauv deformation (hloov vim lub siab los yog kev ntxhov siab) thiab zawv zawg ntawm lub hauv paus. Tsis tas li ntawd, cov dej khov hauv nruab nrab ntawm ib dej khov ua tau ntws sai dua tshaj cov dej khov raws ib sab ntawm ib dej khov raws li qhia los ntawm cov pob zeb hauv qhov piv txwv no (txoj cai).
Qhov twg ntawm qhov dej khov txav nrawm dua saum lossis hauv qab?
Cov ceev ntawm glacial Kev hloov pauv yog ib feem txiav txim los ntawm kev sib txhuam. Kev sib txhuam ua rau cov dej khov ntawm qhov hauv qab ntawm glacier txav maj mam tshaj dej khov ntawm lub saum.
Pom zoo:
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