Umphakamo wolwandle ngaselunxwemeni lwase-USA uya kunyuka malunga nama-25 ukuya kuma-30 cm ngokomndilili ngaphezu kwamanqanaba akhoyo kule minyaka ingama-30 izayo. Ngenxa yoko, amaza olwandle kunye nokuphakama kwezaqhwithi kuya kwanda kwaye kufikelele kumbindi welizwe kwipateni yezikhukhula eziselunxwemeni. Ukunyuka okongeziweyo kwinqanaba lolwandle kugqitywa ngokukhutshwa kwekhabhoni yangoku kunye nexesha elizayo. Okukhona kukhutshiweyo okukhulu, kokukhona kukhulu ubushushu bukazwe lonke, kwaye ubukhulu becala ukubakho kwamanqanaba aphezulu olwandle.
INgxelo yobuGcisa ehlaziyiweyo malunga neemeko zokunyuka komphakamo wolwandle e-United States epapashwe nguZwelonke OLwandleic kunye ne-Atmospheric Administration (NOAA) iqikelela ukuba isihlobo Ulwandle inqanaba ngakunxweme lwase-US liza kunyuka ngokomndilili malunga neenyawo kule minyaka ingama-30 izayo ephantse ilingane nokunyuka komgangatho kule minyaka ili-100 idlulileyo.
The Ulwandle ukunyuka kwenqanaba kuya kwahluka ngokwengingqi ecaleni kwamanxweme. Ukunyuka kumashumi amathathu eminyaka ezayo kulindeleke ukuba, ngokwe-avareji: 10 - 14 intshi (0.25 - 0.35 yeemitha) kunxweme lwaseMpuma; 14 – 18 intshi (0.35 – 0.45 yeemitha) kunxweme lweGulf; 4 – 8 intshi (0.1 – 0.2 yeemitha) kunxweme oluseNtshona; 8 – 10 intshi (0.2 – 0.25 yeemitha) kwiCaribbean; I-6 - 8 intshi (0.15 - 0.2 yeemitha) kwiZiqithi zaseHawaii; kunye ne-8 - 10 intshi (0.2 - 0.25 yeemitha) kumntla weAlaska.
Ngenxa yoko, amaza olwandle kunye nokuphakama kwezaqhwithi kuya kwanda kwaye kufikelele kumbindi welizwe kwipateni yezikhukhula eziselunxwemeni. Kuqikelelwa ukuba izikhukhula "eziphakathi" (ngokuqhelekileyo ziyonakalisa) ziya kwenzeka rhoqo kwi-2050 (iziganeko ezi-4 / ngonyaka) kunokuba "zincinci" (uninzi ziphazamisayo, ziphazamisa, okanye ziphezulu) izikhukhula zenzeka namhlanje (iziganeko ezi-3 / ngonyaka). Izikhukhula "ezinkulu" (ezidla ngokutshabalalisa) kulindeleke ukuba zenzeke ngokuphindwe kahlanu kwi-2050 (iziganeko ze-0.2 / ngonyaka) njengoko zenza namhlanje (iziganeko ze-0.04 / ngonyaka). Ngaphandle kwemilinganiselo eyongezelelweyo yokunciphisa umngcipheko, iziseko zophuhliso ezingaselunxwemeni zase-US, uluntu, kunye nenkqubo yendalo iya kujongana neempembelelo ezongezelelekileyo.
Ukunyuka okongeziweyo kwinqanaba lolwandle kugqitywa ngoku kunye nexesha elizayo ikhabhoni izinto ezikhutshwayo. Okukhona kukho ukukhutshwa kwezinto ezikhutshwayo, kokukhona kunyuka ubushushu behlabathi, kwaye kokukhona kukho amathuba aphezulu olwandle. Malunga neemitha ezi-2 (0.6 yeemitha) zokuphakama komphakamo wolwandle kunxweme lwase-US kunokwenzeka ukuba phakathi kuka-2020 no-2100 ngenxa yezinto ezikhutshwayo ukuza kuthi ga ngoku. Ukungaphumeleli ukunqanda ukukhutshwa kwezinto ezikhutshwayo kwixesha elizayo kunokubangela ukonyuka kwe-1.5 - 5 iinyawo (0.5 - 1.5 yeemitha) ukuya kwi-3.5 - 7 iinyawo (1.1 - 2.1 yeemitha) ekupheleni kwale nkulungwane.
Ngaphezulu kwe-3°C ye ubushushu bukazwe lonke, ukunyuka komphakamo wolwandle okukhulu kunokwenzeka kwi i-USA nakwihlabathi jikelele ngenxa yokunyibilika ngokukhawuleza kwamaqhekeza omkhenkce eGreenland kunye Antarctica.
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Imbekiselo:
Sweet, WV, okqhubekayo, ngo-2022: Iimeko zokuPhakamisa iNqanaba loLwandle lweHlabathi kunye neNgingqi e-United States: UHlaziyo lweNtelekelelo eLingeneyo kunye neMgangatho oNgameleyo waManzi kuNxweme lwase-US. INgxelo yoBuchwephesha be-NOAA NOS 01. Ulawulo lweSizwe lwe-Oceanic kunye ne-Atmospheric, iNkonzo yoLwandle lweSizwe, iSilver Spring, i-MD, i-111 iphe. Ipapashwe nge-15 kaFebruwari 2022. Ifumaneka apha https://oceanservice.noaa.gov/hazards/sealevelrise/noaa-nostechrpt01-global-regional-SLR-scenarios-US.pdf
