Yanayin yanayi na Buenos Aires

Buenos Aires, babban birnin Argentina, yana da yanayi mai sanyi, wanda aka rarraba shi azaman Yanayin zafi mai zafi (Cfa) a ƙarƙashin Rarrabawar yanayi na Köppen. Lokacin bazara yana da zafi da zafi tare da tsawa mai yawa yayin da hunturu ke da sanyi kuma ya bushe tare da sanyi wanda ke faruwa a matsakaici sau biyu a kowace shekara. Lokacin bazara da fall sune lokutan canji waɗanda ke da yanayin canji. A cibiyar lura da tsakiya, mafi girman zafin jiki da aka rubuta shine  ° C (109.9 ° F), kuma mafi ƙarancin zafin jiki wanda aka rubuta shine -5.4 ° C (22.3 ° F).

Abubuwa daban-daban na yanayi suna tasiri ga yanayin Buenos Aires. Kudancin Atlantic High na dindindin yana rinjayar yanayin sa a ko'ina cikin shekara ta hanyar kawo iskõki masu laushi daga arewa maso gabas, wanda ke kawo mafi yawan hazo zuwa birni a cikin Tsarin gaba a lokacin hunturu ko guguwa da aka samar ta hanyar Cyclogenesis a cikin kaka da hunturu. Yanayin zafi da hasken rana mai yawa a cikin watanni na rani suna samar da tsarin matsin lamba da ake kira Chaco Low a arewacin Argentina, yana haifar da matsin lamba wanda ke kawo iskar gabas mai laushi zuwa birnin - saboda wannan, lokacin rani shine mafi yawan ruwan sama. Sabanin haka, wannan tsarin matsin lamba yana raunana a cikin hunturu, wanda ya haɗu da iskõki masu ƙarfi na kudu yana haifar da lokacin bushewa saboda iskõki marasa ƙarfi na gabas. Da yake yana cikin Pampas, Buenos Aires yana da yanayi mai canzawa saboda wucewar iska mai banbanci - sanyi, busassun Pampero daga kudu da dumi, iska mai zafi daga arewa. Yanayin bakin teku yana haifar da tasirin teku mai ƙarfi, wanda ke haifar da matsanancin yanayin zafi (mai zafi ko sanyi) ya zama da wuya.

 Yanayin yanayi gaba ɗaya 
alt=Picture showing regional impacts on El Niño. During the warm season, an El Niño leads to higher precipitation.|thumb|284x284px|A lokacin shekarun El Niño, ruwan sama a Buenos Aires ya fi girma, musamman a lokacin watanni na rani.
Buenos Aires tana cikin yankin yanayi mai zafi (Köppen climate classification: Cfa). Saboda tasirin teku daga Tekun Atlantika da ke kusa,  yanayin sa yana da matsakaici tare da matsanancin yanayin zafi (duka zafi da sanyi) yana da wuya.  Don haka, iska mai sanyi da ke zuwa kai tsaye daga kudu yana daidaitawa ta Tekun Atlantika kuma yana da dumi fiye da iskõki daga kudu maso yamma (waɗanda ba su daidaita ta ba). 

Yanayin yanayi na Bueno Aires ya mamaye ta hanyar [./S<sup id= o_Atlantic_High" id="mwTw" rel="mw:WikiLink" title="South Atlantic High">Kudancin Atlantic High] a duk shekara. Wannan yana kawo iskar da ke da laushi daga arewa maso gabas, wanda ke kawo mafi yawan ruwan sama zuwa birnin. A lokacin hunturu, yana kawo Tsarin gaba da ke da alhakin hazo a cikin birni. A cikin kaka da rani, yana haifar da tsawa wanda yawanci yake a arewacin birnin kuma yana samar da iskõki masu ƙarfi daga kudu ko kudu maso gabas wanda a wasu lokuta zai iya haifar da kumbura na Rio de la Plata, ambaliyar ruwa a yankunan bakin teku. Kudancin Pacific High shine asalin iska mai zurfi wanda ke da alhakin yanayin sanyi kuma yana haifar da yanayi mai haske da bushewa sosai. Wadannan iska sun samo asali ne daga Kudancin Pacific kuma suna motsawa a arewa maso gabas a lokacin hunturu zuwa Buenos Aires. Kodayake yana da teku mai sanyi (wannan iska ce mai laushi wanda ke samuwa daga teku da ke cikin yankunan Antarctic da Antarctic a kudancin Kudancin Amurka), yana canzawa yayin da yake wucewa a kan nahiyar Kudancin Amurka, ya zama bushe yayin da ya isa Buenos Aires. Wannan saboda yayin da iska mai sanyi daga Kudancin Pacific High ke motsawa a kan Tekun Pacific da Andes kuma suna isa ƙasar kudu da 35oS (inda Andes ba su da tsawo), anticyclogenesis yana haifar da kafa tsarin matsin lamba mai ƙarfi a tsakiyar ƙasar (a kusa da 40oS).   Wannan tsarin matsin lamba yana kawo sanyi da bushe, iska mai zurfi zuwa Buenos Aires. Yankunan sanyi sun fi yawa a lokacin hunturu fiye da lokacin rani kamar yadda Kudancin Atlantic da Kudancin Pacific suke a matsayinsu na kudanci a lokacin rani, yana mai da wuya ga Yankunan Cold su shiga.

Birnin yana cikin wani yanki inda iskar Pampero da Sudestada ke wucewa. Da yake yana cikin Pampas, yanayin yana da bambanci saboda bambancin iska da guguwa ta gaba. Iska ta Pampero tana kawo iska mai sanyi, mai bushewa daga kudu yayin da iska mai zafi mai zafi ke samar da arewa sultry (iska mai laushi yawanci daga arewa maso gabas wanda iskar kasuwanci da Kudancin Atlantic High suka kafa wanda ke kawo girgije, zafi, da yanayin zafi kuma yana da alhakin kawo raƙuman zafi).    Sau da yawa, wucewar iskar Pampero tana faruwa yayin da sanyi ke wucewa, wanda ke haifar da guguwa mai ƙarfi daga kudu ko kudu maso gabas, raguwar danshi da zafin jiki, da karuwar matsin yanayi. Lokacin da iskar Pampero mai sanyi ta haɗu da iska mai zafi daga arewa, ana samar da tsawa. An kafa iskar Sudestada lokacin da tsarin matsin lamba mai girma da ke kudancin Argentina ke hulɗa tare da tsarin matsi mai sauƙi a kan Uruguay da kudancin Brazil. Lokacin da Sudestadas suka samo asali, suna kawo dogon lokaci na hazo, yanayin hazo da yanayin sanyi. Wadannan sun zama ruwan dare a lokacin watanni na hunturu. Saboda Sudestada yana kawo saurin iska mafi girma (musamman lokacin da aka haɗa waɗannan iskõki tare da raƙuman ruwa), Sudestada tana da alhakin ambaliyar ruwa da ke faruwa a yankunan da ke ƙasa. Geomorphology tare da rashin isasshen hanyar sadarwa da ababen more rayuwa, shimfidar wuri, da ƙananan tsaunuka (yawancin Buenos Aires yana tsakanin mita 4 da 24 (13 da 79  sama da matakin teku) ya sa Buenos Aires ya kasance mai saukin ambaliyar ruwa, musamman a lokacin ruwan sama mai yawa. Ambaliyar ruwa ta shafi unguwanni La Boca da Barracas waɗanda ke cikin sassan kudancin birnin, mafi ƙasƙanci kuma matalauta ne ke zaune (na ƙasƙanci).

Tsibirin zafi na birni ya sa birnin ya fi zafi fiye da yankunan karkara da yankunan ƙauyuka. A matsakaici, Buenos Aires ya fi zafi fiye da yankunan da ke kewaye da shi da 1.5 zuwa 3.5 ° C (2.7 zuwa 6.3 ° F) saboda tsibirin zafi na birni. Matsakaicin tsibirin zafi ya fi girma a lokacin rani fiye da hunturu. Wannan ya bambanta da yanayi; tasirinsa a lokacin rana ya fi karfi a watan Yuli fiye da Janairu. Sabanin haka, tasirin tsibirin zafi na birane a cikin dare ya fi tsanani a watan Janairu fiye da Yuli.

El Niño-Southern Oscillation babban abu ne a cikin bambancin ruwan sama na shekara-shekara a cikin Buenos Aires da Pampas, musamman a lokacin bazara da rani. A lokacin shekara ta El Niño, ruwan sama ya fi girma, tare da karuwar ruwan sama daga Nuwamba zuwa Janairu. Sabanin haka, shekarun La Niña suna da alaƙa da ƙananan hazo;  hazo yana ƙasa da matsakaici a lokacin Oktoba-Disamba. 

 Yanayin yanayi 
alt=Jacarandas in bloom at Plaza Miserere, Buenos Aires during Spring|thumb|175x175px|Jacarandas in bloom at Plaza Miserere, Buenos Aires
Ruwan ruwa a Buenos Aires yawanci suna da sauƙi a rana tare da sanyi zuwa sanyi da dare. Matsakaicin matsakaicin shine  ° C (73.0 ° F) yayin da matsakaicin matsakaici shine  ° C (56.1 ° F).  Yana daya dag lokutan ruwan sama mafi yawa a cikin birni, matsakaicin   in) na hazo da kwanaki 28 tare da ruwan sama mai auna. Duk da haka, yawancin abubuwan da suka faru na hazo ba su da tsawo. 

Lokacin bazara yana da yanayin canji tare da yanayin zafi wanda zai iya canzawa. Iska mai sanyi daga kudu na iya kawo yanayin sanyi. Wani misali mai tsanani na wannan ya kasance a watan Nuwamba 2007, lokacin da iska mai sanyi daga kudu ya kawo yanayin zafi zuwa  ° C (36.5 ° F) a safiyar 15 ga Nuwamba. Wannan iska mai zafi ya shafi sassa da yawa na kasar, yana kawo yanayin sanyi da dusar ƙanƙara a sassan bakin teku na Patagonia. Sabanin haka, iska mai zafi daga arewa yana samar da kwanakin sultry;  mafi girman zafin jiki da aka rubuta a cikin bazara shine  ° C (98.2 ° F) a ranar 27 ga Nuwamba 1955. A wasu lokuta, raƙuman zafi,  na iya faruwa, musamman a watan Nuwamba.

 Lokacin bazara 
Lokacin bazara yana da zafi da zafi. A matsakaici, safiya da yamma suna da zafi yayin da yanayin zafi ke raguwa sosai da dare. Matsakaicin matsakaicin shine  ° C (84.7 ° F) yayin da matsakaicin matsakaici shine  ° C (66.9 ° F).  Tare da matsakaicin ruwan sama na   in), shine lokacin ruwan sama mafi yawa. Wannan ya faru ne saboda yanayin zafi mai yawa da kuma hasken rana mai yawa wanda ke haifar da ci gaban tsarin matsin lamba da ake kira Chaco Low wanda ke arewacin Argentina wanda ke hulɗa da Kudancin Atlantic High don samar da matsin lamba wanda ke kawo iskar gabas mai laushi zuwa yankin, yana son hazo, wanda galibi yana faruwa  nau'in tsawa. Chaco Low kuma yana hulɗa tare da Kudancin Atlantic high don kawo iska mai dumi da na wurare masu zafi daga arewa wanda shine mafi karfi a lokacin rani lokacin da Chaco Low ya fi karfi saboda mafi girman insolation.

Guguwar zafi abu ne na gama gari a lokacin bazara a cikin birni.  Wadannan raƙuman zafi suna ba da ƙarin buƙatu akan amfani da wutar lantarki, wanda ke haifar da ƙarancin ƙarfi.  A cikin matsanancin yanayi, waɗannan ƙarancin wutar lantarki a lokacin raƙuman zafi na iya haifar da cunkoson ababen hawa da zanga-zanga, kamar zafin rana na 12 ga Maris 2023 mai gudana, zafi mafi tsayi da aka taɓa yin rikodin a Buenos Aires[4] Duk da haka, yawancin raƙuman zafi ba su wuce tsawon mako guda ba,  kuma ana biye da yanayin sanyi, bushewar iska ta Pampero, wanda ke haifar da tashin hankali da zafi mai ƙarfi.  da ƙarancin zafi.[

]  Lokaci-lokaci, guguwa na iya tasowa, wanda zai iya afkawa cikin birni;  yawancin guguwa suna da rauni kuma ba kasafai suke haifar da mutuwa ba.[8]  Mafi girman haɗari ga guguwa yana faruwa a lokacin rani saboda kyawawan yanayi.[8]  Wadannan guguwa mai tsanani na iya lalata motoci, gidaje da kuma dakile ayyukan jama'a kamar sufuri da tarawa da zubar da dattin gari..

 Lokacin kaka 
A farkon kaka, yanayin zafi yana da zafi zuwa zafi da rana yayin da dare da safe suke da sauƙi. Daga baya  kakar, yanayin ya fi sanyi tare da nuna yamma mai sauƙi, da dare mai sanyi da safiya. Matsakaicin sama da ƙasa sune  ° C (73.8 ° F) da  ° C (57.7 ° F) bi da bi yayin da ruwan sama ya kai   in) a lokacin wannan kakar. Kamar bazara, yanayin yanayi mai canzawa yana da yanayin zafi wanda zai iya canzawa;  yanayin zafi har zuwa  ° C (100.2 ° F) kuma kamar yadda yake ƙasa kamar -4.0 ° C (24.8 ° F) an rubuta shi. Lokaci na ruwan sama yana faruwa kodayake waɗannan yawanci gajeren lokaci ne. Ruwan sanyi ba ya faruwa, kodayake suna iya faruwa tun farkon Mayu.
+Snowfall a Buenos Airesalt=Picture showing snow covering Plaza de Mayo in 1918|border|180x180pxSnow a Plaza de Mayo a cikin 1918alt=Snowfall in Buenos Aires in 2007|border|120x120pxSnow a Buenos Aires a cikin 2007
Yuni zuwa Agusta watanni ne na hunturu a Buenos Aires.  Lokacin sanyi yana da sanyi tare da yanayin zafi a rana da sanyi dare.  Maɗaukaki a lokacin matsakaita 16.6 °C (61.9 °F) yayin da ya ragu matsakaicin 8.3 °C (46.9 °F).  Ana iya samun raƙuman sanyi a cikin waɗannan watanni waɗanda lokutan sanyi na iya dawwama na kwanaki.  Wadannan raƙuman sanyi, musamman a lokacin sanyi mai tsanani suna haifar da haɓakar buƙatar makamashi, wanda zai iya haifar da ƙarancin makamashi.  tun lokacin da aka fara lura da yanayin yanayi a shekarar 1906 a cibiyar lura da yanayi ta tsakiya, sau uku ne kawai ake ganin dusar ƙanƙara: Yuni 1918, Yuli 1928, da Yuli 2007.] Wannan ya faru ne saboda tsakiyar birnin yana da yanayin zafi fiye da wuraren da ke kewaye da shi saboda tasirin tsibiri na zafi na birane..

Yawancin hazo ya fito ne daga tsarin gaba da ke da alaƙa da cyclogenesis da iska mai ƙarfi na kudu maso gabas (Sudestada), wanda ke kawo dogon lokaci na hazo, yanayin hazo da yanayin sanyi. Lokacin hunturu yana da hazo yayin da yanayin dangi yana da yawa, sau da yawa 90% ko mafi girma, yana sa yanayin ya zama mara kyau, launin toka da sanyi. Lokaci-lokaci, iska mai dumi daga arewa yana kawo yanayin zafi. Wadannan iska mai dumi na iya kawo yanayin rana, musamman a lokacin da rana lokacin da suka zo daga arewa ko arewa maso yamma sakamakon rami da ke tsakiyar Argentina. A gefe guda, iska mai dumi daga Brazil yana kawo yanayin zafi, yana nuna zafi mai yawa tare da murfin girgije mai girma wanda ya dace da gaba mai dumi na tsarin gaba da kuma yanayin iska mai zafi. Wadannan iska mai dumi waɗanda ke da alhakin zafi mai yawa da girgije sune iska mafi zafi, wanda ke haifar da yanayin zafi mafi zafi. Duk da haka, waɗannan ba su da rai kamar yadda Chaco Low, wanda ke da alhakin kawo iska mai dumi da na wurare masu zafi daga arewa ya fi rauni a cikin hunturu saboda ƙananan insolation, wanda ke haifar da iskõki daga arewa ba su da ƙarfi kuma sun fi guntu.

Zuwa ƙarshen hunturu a watan Agusta, akwai muhimman canje-canje a cikin yaduwar yanayi. Rashin zafi, iska mai laushi yana shiga cikin birni, hasken rana mafi girma da kuma rikice-rikicen yanayi na yau da kullun daga yamma yana faruwa a ƙarshen hunturu. Saboda haka, ƙarshen hunturu yawanci ana nuna shi da guguwa mai ƙarfi tare da walƙiya. Wannan an san shi da Santa Rosa Storm, a kusa da 30 ga watan Agusta. Dangane da shekaru 111 na lura da yanayi (1906-2016) daga cibiyar lura da tsakiya, shekaru 61 (55% na lokacin) sun ga yanayin guguwa da ke faruwa a kwanakin kusa da 30 ga Agusta, kodayake ba duk waɗannan ba ne suka haifar da ruwan sama mai yawa.

 Yanayin zafi 
A cewar cibiyar lura da tsakiya, wacce ke da daya daga cikin mafi aminci da tsofaffin rikodin a Kudancin Amurka,  mafi girman zafin jiki a Buenos Aires,  ° C (109.9 ° F), an rubuta shi a ranar 29 ga Janairun 1957 yayin da mafi ƙarancin zafin jiki da aka rubuta shine -5.4 ° C (22.3 ° F) a ranar 9 ga Yuli 1918.  Shekarar da ta fi zafi a rubuce ita , tare da matsakaicin zafin shekara-shekara na  ° C (66.6 ° F).  A gefe guda, 1911 ita ce shekara mafi sanyi, tare da matsakaicin zafin shekara-shekara na  ° C (59.7 ° F). 
Ƙididdigar zafin jiki mai tsanani (1906-yanzu) Ma'auniJan Fabrairu Maris Afrilu Mayu Yuni Yuli Aug Satumba Oktoba Nuwamba Disamba Mafi yawan zafin jiki na kowane wataMafi sanyi matsakaicin zafin jiki na wataMafi ƙarancin zafin jikiMafi ƙarancin zafin jiki
Shekarar da aka samu mafi yawan ruwan sama ita ce 1900, lokacin da birnin ya sami   in) na ruwan sama. A gefe guda, 1916 ta kasance shekarar da ta fi bushewa, tare da matsakaicin ruwan sama na shekara-shekara na   in).  An rubuta mafi girman hazo na rana ɗaya a ranar 27 ga Fabrairu 1930, lokacin da   in) na hazo ya faɗi.
Ƙididdigar ruwan sama mai yawa (1906-yanzu) Ma'auniJan Fabrairu Maris Afrilu Mayu Yuni Yuli Aug Satumba Oktoba Nuwamba Disamba Ruwan sama mafi zafi a kowane wataRuwan sama mafi bushewa a kowane wataMafi yawan ruwan sama a rana ɗaya

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