Ukuhlaziywa kwe-Thermocline Dynamics emanzini aseMpumalanga ye-Indonesia
Amanzi aseMpumalanga ye-Indonesia aphakathi kwezindawo zasolwandle eziyinkimbinkimbi kakhulu emhlabeni, kokubili ngokwe-oceanography yemvelo kanye nokuguquguquka kwesimo sezulu sesifunda. Lesi sifunda sihlanganisa uLwandle iBanda, uLwandle iSeram, uLwandle iHalmahera, uLwandle i-Arafura, kanye namanzi azungeze iMaluku nePapua. Lezi zindawo zixhunywe ngemigudu emincane ephakathi kweziqhingi futhi zixhumana ngqo noLwandlekazi iPacific kanye nolwaseNdiya. Ingxenye ebalulekile elawula isakhiwo sekholomu yamanzi kanye nezinqubo zolwandle kulesi sifunda yi-thermocline, ungqimba lokuguquka lapho izinga lokushisa lamanzi lehla khona ngokushesha ngokujula. Ukuhlaziya ukuguquguquka kwe-thermocline eMpumalanga ye-Indonesia kubalulekile ngoba kuthonya ukujikeleza kwegazi, umkhiqizo wokudoba, ukusatshalaliswa kwezakhamzimba, kanye nokuguquguquka kwesimo sezulu sendawo.
Incazelo kanye nezici ze-thermocline
Ngokuvamile, ikholomu yamanzi olwandle ihlukaniswe yaba izendlalelo ezintathu eziyinhloko: (1) ungqimba oluxubile ebusweni olufana kakhulu ngenxa yokuvunguza komoya kanye nokushisa kwelanga, (2) i-thermocline njengendawo yezinga lokushisa elibukhali, kanye (3) ungqimba olujulile olupholile noluzinzile. Ezindaweni ezishisayo ezifana ne-Eastern Indonesia, i-thermocline ivame ukuba mfushane uma iqhathaniswa nezindawo eziphakeme, ngoba ukushisa okunamandla komhlaba kudala ukuhlukaniswa. Ukujula kwe-thermocline kuyahlukahluka, kodwa kuvame ukuba phakathi kwamamitha ayishumi kuya kwamakhulu, kuye ngesizini, imisinga, kanye nezinqubo zendawo.
I-thermocline ayiyona nje "umngcele wokushisa," kodwa futhi ingumngcele oguquguqukayo: isebenza njengesithiyo ekushintshaneni kobuningi namandla phakathi kobuso nolwandle olujulile. Lapho i-thermocline iqina, ukuxubana okuqondile kuyaba buthaka, okwenza kube nzima ukuthi izakhamzimba ezivela ngaphansi zikhuphuke. Ngokuphambene nalokho, lapho i-thermocline ibuthakathaka noma ikhuphuka (ikhuphuka), izakhamzimba zingena kalula endaweni ejabulisayo futhi zingakhulisa umkhiqizo oyinhloko.
Umongo we-Oceanography yaseMpumalanga ye-Indonesia
I-Eastern Indonesia iyisizinda sechibi elifudumele elishisayo kanye nomzila oyinhloko we-Indonesian Throughflow (ITF), ukugeleza kwamanzi amaningi ukusuka ePacific kuya e-Indian Ocean ngokusebenzisa i-straits kanye ne-inter-island basin. I-ITF idlula ezindaweni ezifana ne-Halmahera-Seram-Banda Seas, bese iphuma nge-Ombai Strait, i-Lombok Strait, kanye ne-Timor Strait. Ukunyakaza kwala manzi amaningi kuhlangana ne-topography eyinkimbinkimbi kanye nezinqubo zokuxuba ezinamandla, ngaleyo ndlela kushintsha isakhiwo sokushisa kanye nosawoti.
Ezindaweni eziningi ezingaphansi komhlaba (isibonelo, uLwandle lwaseBanda olujulile), ukuhlukaniswa kwezindawo kungathuthukiswa kakhulu, kodwa izinqubo zolwandle kanye namagagasi angaphakathi abangelwa yizimbobo kanye nemithambeka emide kungadala ukuxubana okukhulu. Lokhu kuhlanganiswa kokuhlukaniswa kwezindawo ezishisayo kanye nokuxubana kwezindawo yikona okwenza i-thermocline eMpumalanga ye-Indonesia ibe namandla kangaka.
Izimbangela eziyinhloko ze-thermocline dynamics
1) Ukwehlukahluka kwezinkathi zemvula
Izimvula zase-Australia nase-Asia zilawula amaphethini omoya, imvula, kanye nokushintshashintsha kokushisa komhlaba. Ngesikhathi sezimvula zaseningizimu-mpumalanga (ngokuvamile cishe ngoJuni-Septhemba), imimoya ivame ukuba yome futhi ibe namandla eningizimu ye-Indonesia, ikhulisa ukuhwamuka komhlaba futhi ithuthukise ukupholisa komhlaba kwezinye izindawo. Okwamanje, izimvula zasenyakatho-ntshonalanga (cishe ngoDisemba-Mashi) ziletha umoya omanzi futhi zishintsha ukufudumala komhlaba kanye nokuhlukaniswa kwawo.
Umthelela ku-thermocline ungenzeka ngezindlela ezimbili: (a) izinguquko ekuqineni kokushukuma komhlaba okuthinta ukujula kwengqimba exubile, kanye (b) izinguquko ekuphoqelelweni komoya okubangela ukuhlukana noma ukuhlangana kwamanzi angaphezulu ukuze i-thermocline iphakanyiswe noma yehliswe. Emanzini amancane nayinkimbinkimbi, le miphumela ivame ukuba yendawo, kodwa isakhiqiza amaphethini esizini abonakalayo.
2) Ukugeleza kwamanzi e-Indonesia (i-ITF) kanye nokwanda kwamanzi
I-ITF ithutha amanzi afudumele asePacific anezimpawu ezithile zosawoti emanzini asempumalanga ye-Indonesia. Lokhu kukhula kungajulisa noma kunciphise i-thermocline kuye ngokulinganisela kwengcindezi, ijubane lamanje, kanye nokuma kwe-bathymetric. Njengoba ukuthuthwa kwe-ITF kuqina, kunethuba lokukhula kwamanzi ashisayo avela enyakatho, okungashintsha ukuthambekela kwe-isotherm kanye nobukhulu be-thermocline.
Ngaphezu kwalokho, ukusebenzisana kwe-ITF nezitsha ezijulile njengeBanda kudala ukujikeleza kwendawo kanye nokwakheka kwemifudlana yomngcele ekwazi ukushintsha isakhiwo se-thermocline ngokuvundlile nangokuqondile.
3) Ukuxuba amagagasi namagagasi angaphakathi
I-Eastern Indonesia yaziwa njengendawo yokuxubana kwamagagasi emhlabeni jikelele. Ama-sill angajulile, imifudlana emincane, kanye nemithambeka emide kubangela ukukhiqizwa kwamagagasi angaphakathi angaphula futhi axube amanzi ngokuqondile. Le nqubo ivame ukwenzeka eduze kwe-Ombai Strait, uLwandle iSeram, kanye neminye imigudu emincane.
Ku-thermocline, ukuxubana kwamaza kunemiphumela emibili: (1) kwenza i-thermocline ibe nkulu futhi kunciphisa izinga lokushisa elibukhali kwezinye izindawo, kanye (2) kwandisa ukushintshaniswa kwezakhamzimba kusukela phansi kuya phezulu. Ezikalini zansuku zonke kuya masonto onke, amagagasi angaphakathi angenza i-thermocline ibe “yi-wavy,” inyuka futhi yehle amashumi amamitha, ithinta indawo yokuhlala ye-biota kanye nokuchazwa kokubhekwa kwezinga lokushisa.
4) Ukuguquguquka kwaminyaka yonke (i-ENSO kanye ne-IOD)
Izimpawu ze-El Niño–Southern Oscillation (ENSO) kanye ne-Indian Ocean Dipole (IOD) zingashintsha imimoya yesifunda, izinga lolwandle, kanye nesakhiwo sokushisa empumalanga ye-Indonesia. Ngesikhathi se-El Niño, ichibi elifudumele lasePacific livame ukushintsha futhi ukucindezeleka komoya kuyashintsha, okunganciphisa ukuhlinzekwa kwamanzi afudumele esifundeni sase-Indonesia futhi kushintshe amandla e-ITF. Lezi zinguquko zingathinta ukujula kwe-thermocline, ikakhulukazi ezindaweni ezixhunywe ngqo entshonalanga yePacific.
I-IOD iphinde ibe nomthelela ngezimo ezishintshayo empumalanga ye-Indian Ocean, ezithinta i-gradient yengcindezi futhi ekugcineni zishintshe umkhiqizo we-ITF. Eminyakeni ethile, inhlanganisela ye-ENSO-IOD ingadala ukungalingani okukhulu kwe-thermocline, okuthinta amazinga okushisa olwandle, imvula yasogwini, kanye nokukhiqiza kwezinhlanzi.
Amaphethini endawo: izitsha ezijulile vs amanzi angajulile
Ukuguquguquka kwe-Thermocline eMpumalanga ye-Indonesia akufani. Ezindaweni ezijulile njengoLwandle iBanda, i-thermocline ingakhula ngokucacile kodwa ithonywa kakhulu ukuxubana kwangaphakathi kanye nokugeleza kwe-basin. Okwamanje, emanzini angajulile kanye namashalofu ase-continental njengoLwandle i-Arafura, isakhiwo sokushisa sixutshwa kalula ngenxa yokujula okulinganiselwe kanye nethonya lolwandle, ngakho-ke i-thermocline ingaba buthakathaka noma ibe nesizini.
Ezindaweni eziseduze nomgodi wokungena ePacific (ezungeze iHalmahera nenyakatho yePapua), ithonya lamanzi amaningi asePacific linamandla kakhulu, ngakho-ke ukujula kwe-thermocline kanye nesimo "samanzi e-thermocline" kuvame ukulandela ukuguquguquka kwentshonalanga yePacific. Eningizimu naseningizimu-ntshonalanga (eduze koLwandle iTimor kanye neNusa Tenggara), ithonya loLwandlekazi i-Indian kanye nezinqubo zokukhuphuka kwezinkathi zonyaka zingabonakala kakhulu.
Imiphumela ezindaweni zemvelo kanye nokudoba
I-thermocline isebenza "njengomlawuli" wokutholakala kwezakhamzimba. Uma i-thermocline ijule kakhulu futhi izinzile, izakhamzimba zibambeke ngaphansi, okubangela ukwehla kokukhiqiza okuphezulu, okuthinta uchungechunge lokudla kanye nokudoba kwezinhlanzi zasemanzini ashisayo. Ngokuphambene nalokho, lapho i-thermocline ikhuphuka noma iba buthaka ngenxa yokuphakama, ukuxubana kwamaza, noma ukungalingani kwesimo sezulu, izakhamzimba zikhuphukela endaweni yokukhanya futhi zikhuthaze ukuqhakaza kwe-phytoplankton.
Ezinhlanzini ezitholakala emanzini abandayo njenge-tuna, i-thermocline nayo ithonya ukusatshalaliswa okuqondile kwezindawo zokuhlala, njengoba izinhlobo eziningi zisebenzisa imingcele yokushisa ukuze zidle noma zigweme izilwane ezidla ezinye. Ukuguquguquka kwansuku zonke okubangelwa amagagasi angaphakathi kungashintsha ngisho nokujula "kwesendlalelo senduduzo" sezinto eziphilayo zasemanzini, okubalulekile emisebenzini yokudoba kanye nokuchazwa kwedatha ye-acoustic.
Indlela yokuhlaziya i-Thermocline dynamics
Izifundo ze-Thermocline eMpumalanga ye-Indonesia ngokuvamile zihlanganisa imithombo eminingana yedatha: amaphrofayili okushisa-usawoti avela kuma-CTD kanye nama-Argo floats, ukuzwela okude (i-SST kanye nezinga lolwandle njengezinkomba ze-dynamics), kanye namamodeli e-oceanographic ezinombolo anesinqumo esiphezulu. Amapharamitha avamile okulinganisa i-thermocline afaka ukujula kwe-isotherm ethile (isb., 20°C njengokulinganiselwa ezindaweni ezishisayo), i-gradient ephezulu yokushisa eqondile, kanye nobukhulu be-thermocline.
Ukuhlaziywa kwesimanje kuvame ukuhlanganisa izibalo zesizini nezeminyaka yonke, kanye nokuxilongwa okuguquguqukayo njengendima yokwenyuka okuvundlile, ukuxuba okuqondile, kanye nokuphoqelela umoya. Ngenxa yokuthi ukuma kwe-Eastern Indonesia kuyinkimbinkimbi kakhulu, amamodeli anezinqumo eziqinile avame ukwehluleka ukubamba ukuxubana kwamaza kanye namagagasi angaphakathi; ngenxa yalokho, izindlela ezinezinqumo eziphezulu kanye nokuqinisekiswa kwensimu kubalulekile.
Isiphetho
Ukuguquguquka kwe-Thermocline emanzini aseMpumalanga ye-Indonesia kubunjwa ukusebenzisana okunamandla phakathi kwemvula enkulu, ukugeleza kwe-Indonesia, ukuxubana kwamagagasi kanye namagagasi angaphakathi, kanye nokuguquguquka kwesimo sezulu sonyaka njenge-ENSO kanye ne-IOD. Ukungalingani kwendawo kubangela ukuthi izimpendulo ze-thermocline zihluke kakhulu kuzo zonke izifunda—kusukela ezigodini ezijulile ezihlukaniswe ngezigaba ezibhekana nokuxubana okukhulu, kuya emanzini angajulile, axubene kalula. I-thermocline akuyona nje into ebonakalayo, kodwa iyinto ebalulekile exhumanisa ukuguquguquka kolwandle nezindawo zemvelo, umkhiqizo oyinhloko, kanye nokudoba. Ngakho-ke, ukuqapha isikhathi eside, ukuqaphela okuphezulu, kanye nokuthuthukiswa kwamamodeli akwazi ukumela izinqubo zendawo kuyisisekelo esibalulekile sokuqonda nokuphatha izinsiza zasolwandle zaseMpumalanga ye-Indonesia ngokuqhubekayo.
