Sea level is ris­ing faster: sci­en­tific study

Global Times - - World -

Sea level rise is ac­cel­er­at­ing and could reach 66 cen­time­ters by cen­tury’s end, in line with United Na­tions es­ti­mates and enough to cause sig­nif­i­cant prob­lems for coastal cities, a study said Mon­day.

The past an­nual rate of sea level rise – about three mil­lime­ters per year – may more than triple to 10 mil­lime­ters per year by 2100, said the re­port in the Pro­ceed­ings of the Na­tional Academy of Sciences (PNAS), a peer-re­viewed US jour­nal.

The find­ings are “roughly in agree­ment with the In­ter­gov­ern­men­tal Panel on Cli­mate Change (IPCC) 5th As­sess­ment Re­port (AR5) model pro­jec­tions,” said the re­port, based on 25 years of satel­lite data.

“This ac­cel­er­a­tion, driven mainly by ac­cel­er­ated melt­ing in Green­land and Antarc­tica, has the po­ten­tial to dou­ble the to­tal sea level rise by 2100 as com­pared to pro­jec­tions that as­sume a con­stant rate – to more than 60 cen­time­ters in­stead of about 30,” said study au­thor Steve Nerem.

“And this is al­most cer­tainly a con­ser­va­tive es­ti­mate,” added Nerem, a pro­fes­sor of aero­space en­gi­neer­ing sciences at the Uni­ver­sity of Colorado Boul­der.

Co-au­thors on the study came from the Uni­ver­sity of South Florida, NASA God­dard Space Flight Cen­ter, Old Do­min­ion Uni­ver­sity and the Na­tional Cen­ter for At­mo­spheric Re­search.

Cli­mate change leads to ris­ing seas in two ways. For one, higher con­cen­tra­tions of green­house gases in the at­mos­phere boost the tem­per­a­ture of water and warm water ex­pands.

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