Discover and read the best of Twitter Threads about #LaNina
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Torno sull'eccezionale ondata di calore marino che sta vivendo il Nord Atlantico (NATL), i. p. la regione E a ridosso delle coste europee e quella N. SST nel complesso (0-60N, 0-80W) > 23° C, SSTA > 1° C, std >+3σ! ↙️↘️ #marineHeatwave 🧵 (1/9) @Giulio_Firenze @RobertoIngross2 
Come tutte le forti anomalie, si tratta di una sovrapposizione fra variabilità interna e forzata. Una combinazione insolita delle due, anche perché insolita è la situazione della variabilità interna. Cominciamo con la prima.▶️ tinyurl.com/5x5zztxk (2/9)
C'è una modesta tendenza al rialzo guidata dal cambiamento climatico. In un mondo che si riscalda anche le SST sul NATL ne subiscono l’influenza.▶️ tinyurl.com/4z2zbtrj . Infatti l’indice che definisce la principale variabilità multi-decennale delle SST del NATL…(3/9)
[#Infographie] > Circulation thermohaline au cours des interglaciaires schématisée bit.ly/3NeEg2m via @ResearchGate #ScienceCQFD
En route probable vers un épisode chaud #ElNino pour 2023. Les conditions +froides que la normale, qui ont dominé le Pacifique tropical depuis 3 ans (épisode dit #LaNiña), étaient le dernier verrou qui "empêchait" de battre le record de température globale de la 🌍; il saute 🥵 !
Les relations statistiques entre #ElNino et le climat en France ne sont pas robustes et sont non-systematiques. L’Europe est une des régions les moins affectées sauf pour certains épisodes #ElNino forts.
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Si la connexion s’établit, elle est plutôt en Automne (Europe Med.) puis hiver. Il est encore trop tôt pour connaître l’intensité et les particularités de l'événement 2023-2024 qui va probablement se déclarer.
Latest seasonal predictions from NMME/IMME ensembles out today. Overall North Pacific pattern still looks very #LaNina-like: unusually wet PacNW and BC; unusually dry in SoCal & Lower Colorado Basin due to persistent NE Pacific ridging. HOWEVER... #WAwx #CAwx #AZwx (1/4)
...However, exact position of N. Pac. ridge is key. Too far east, & CA stays dry, but far enough west & Sierra benefits from cold storms diving south. High confidence in winter ridge, but CA will be on razor's edge--exact position will dictate dry vs wet overall. (2/4)#CAwx
For the first time since 1941, the Atlantic has had no named storm (e.g., tropical storm or #hurricane) activity from July 3rd-August 30th.
Since 1950, two Augusts have had no Atlantic named storm formations: 1961 and 1997. It remains to be seen if 2022 will join this list. 1961 ended up a hyperactive #hurricane season with an extremely busy September-November, while 1997 was a below-average season.
This remarkable quiet period is even more impressive given we have a robust #LaNina in the tropical Pacific and anomalously warm tropical Atlantic. Current 30-day-averaged tropical Atlantic sea surface temperatures are 6th warmest since 1982 and typical of a hyperactive season.
A pesar de q se preveía una activa temporada de #Huracanes, el #Atlántico no ha registrado tormentas relevantes (vientos >60km/h) en casi 2 meses.
Julio-Agosto2022 podría convertirse en el bimestre Julio-Agosto más calmo en el Atlántico en últimos 40años!nhc.noaa.gov/cyclones/
Julio-Agosto2022 podría convertirse en el bimestre Julio-Agosto más calmo en el Atlántico en últimos 40años!nhc.noaa.gov/cyclones/
La temporada de #Huracanes comenzó en Junio con la tormenta Alex👇
Las últimas 2 temporadas (2020 y 2021) fueron tan activas q se agotaron los nombres de 21 tormentas dispuestas a inicios de temporada para identificas a las tormentas.
Our #Food and #Water crisis' are rapidly getting worse. Two of the founding necessities for human life and wellbeing are rapidly #collapsing.
In #Kansas thousands of cattle died from the heat and humidity. #WetBulb temperatures hit agricultural production hard.
reuters.com/world/us/heat-…
reuters.com/world/us/heat-…
In #Ethiopia the #drought is so bad that monkeys are attacking children.
independent.co.uk/climate-change…
independent.co.uk/climate-change…
"Listening well entails perceiving others as individuals with valuable and credible knowledge of their experience, and engaging in communication that does not discount or distort what is meaningful to both parties. -- Rosa Ritunnano @RRitunnano greeneracresvaluenetwork.wordpress.com/2022/06/10/dai…
The Theft of the Commons | The New Yorker
newyorker.com/culture/essay/…
#TheCommons, #enclosures, #LandOwnership, #capitalism, #farming, #environment
newyorker.com/culture/essay/…
#TheCommons, #enclosures, #LandOwnership, #capitalism, #farming, #environment
A huge Atlantic ocean current is slowing down—if it collapses, La Niña could become the norm for Australia
theconversation.com/a-huge-atlanti…
#ClimateChange, #LaNina, #AtlanticMeridionalOverturningCirculation, #CurrentSlowdown, #GlobalConsequences
theconversation.com/a-huge-atlanti…
#ClimateChange, #LaNina, #AtlanticMeridionalOverturningCirculation, #CurrentSlowdown, #GlobalConsequences
Forecasters believe La Nina is the most likely ENSO state through the end of 2022 into early 2023. #LaNina has been present since mid-2020 and has caused crop problems in Argentina, southern Brazil and the southern U.S. Plains.
If you're not familiar with ENSO and its cool (warm) phase La Nina (El Nino), or need a refresher, this is for you. Differences in atmospheric pressure influence the tropical trade winds in the equatorial Pacific. That impacts surface water temps and ultimately climate patterns.
This is a visualization of La Nina and El Nino, which are usually strongest during the N. Hemispheric winter months. Surface waters are cool during La Nina, warm during El Nino. Can also have neutral ENSO. ENSO = El Nino-Southern Oscillation, the name for this cycle.
#LaNina #ENSO & drought expectations in Africa - a deep dive into latest satellite imagery and model atmospheric precipitable water data.
Thread...
[image: There is remarkably complex water transport activiy underway over North Africa and the Middle East.]
Thread...
[image: There is remarkably complex water transport activiy underway over North Africa and the Middle East.]
First some background. ENSO, La Nina and El Nino is an oscillation related to sea surface temperatures in the Eastern Pacific. It is an important indicator of drought activity, especially in the US, but also as far away as Africa and NZ. La Nina typically mean less rain.
The image above shows equatorial tropical atmospheric water flows, and helps with understanding of why the Eastern Pacific sea surface temperature is important. Less convective storms in the Eastern Pacific leads to less atmospheric water everywhere.
Severa #Sequía en Sur de #Brasil🇧🇷desde 2019 ha disparado precio internacional de Café&Soya, y costo local de Electricidad (hidroeléctricas abastecen ~65% de consumo nacional). Situación agravada por #CambioClimatico, #LaNiña y deforestación de #Amazonas.nature.com/articles/d4158…
El bajo nivel de los embalses obligados a aumentar el uso de #CombustiblesFósiles para la generación de electricidad...
La #Sequía en Brasil explica el bajo nivel del Paraná aguas abajo👇
Enfin une « bonne » nouvelle en provenance des États-Unis 🇺🇸 : La #sécheresse en partie résorbée en #Californie après plusieurs épisodes d’#intempéries ces dernières semaines. L’État de l'Ouest #américain était en proie à une sécheresse historique à l’automne dernier. #Thread 🧵
📈Contexte : Les #USA contigus ont connu un été météorologique (Juin-Août) 2021 record 🌡, l’un des plus chaud jamais enregistré, à égalité avec l’été 1936. Sur la période Janvier-Août 2021, les températures sur tout l’ouest américain ont été bien au-dessus des normales. @NOAA
Zoom 🔎 sur l’Ouest américain : Tout simplement l’été météorologique le plus chaud depuis le début des relevés en 1895. Près de 3°C au-dessus de la normale 🥵 (1901-2000). Du jamais vu !
Source : @NOAA
Source : @NOAA
Afghanistan's drought will end: 🧵
Despite early warnings of drought extension to 2022 based on seasonal predictions, recent heavy snow has changed the precipitation deficit observed since the start of the wet season in October 2021. If predictions of the next months...1/13
Despite early warnings of drought extension to 2022 based on seasonal predictions, recent heavy snow has changed the precipitation deficit observed since the start of the wet season in October 2021. If predictions of the next months...1/13
...come true, the severe drought in Afghanistan will be over.
In addition to the observation of experts, international organizations have warned about the continuation of drought to 2022. Why have such changes occurred? How it affects the next months’ precipitation? 2/13
In addition to the observation of experts, international organizations have warned about the continuation of drought to 2022. Why have such changes occurred? How it affects the next months’ precipitation? 2/13
The 2021/2022 wet year began dry. Precipitation deficit from October till mid-December was significant, raising fears of drought extension to 2022. 3/13
Afghanistan’s precipitation status: Thread 👇
The water year in Afghanistan begins from the 1st of October and continue till May. As almost 2.5 months have gone, blow I look in to some of the Afghanistan's precipitation statistics. 1/9
The water year in Afghanistan begins from the 1st of October and continue till May. As almost 2.5 months have gone, blow I look in to some of the Afghanistan's precipitation statistics. 1/9
Afghanistan began a drier water year in comparison to the average and last year conditions. The reason is recurrence of the #LaNina in the Pacific Ocean.
A comparison of the current and last year is shown here. 2/9
A comparison of the current and last year is shown here. 2/9
The cumulative decline in precipitation from October till Dec 05, 2021 is depicted here. As can be observed most parts of Afghanistan received less than 50 % precipitation of the normal conditions. 3/9
Probabilidad de q #LaNiña vuelva a fin de año aumentó a 70%. Este enfriamiento en superficie del #Pacífico tropical altera Temp./Lluvias/Vientos en gran parte del🌍. Podría prolongar #Sequía en México, Chile y Brasil (e intensificar temporada de #Huracanes)cpc.ncep.noaa.gov/products/analy…
#LaNiña2020 terminó hace pocos meses👇 Desafortunadamente no es poco común q #LaNiña se presente en 2 años consecutivos.
Las causas de la bajante extrema del río Paraná están dando a lugar múltiples especulaciones. Como investigadora de la variabilidad climática y el #cambioclimático, comparto a título personal unos primeros análisis. Abro HILO
Para el análisis es importante entender que, aguas arriba, a la altura de Corrientes, el río Paraná recibe tanto las aguas del río Paraguay como del Paraná que viene de Brasil y del río Iguazú
Según el #INA el caudal del Paraguay comenzó a disminuir a mediados de 2019, situación que persiste hasta la fecha (con picos en los 2 veranos). En marzo 2020 el Paraná en Brasil y el Iguazú comenzaron también a disminuir su caudal sensiblemente bit.ly/3eEtjoP
#LaNiña se fortaleció durante Noviembre y hay 95% de probabilidades de q se mantenga hasta Marzo. Al contrario q #ElNiño, #LaNiña resulta del enfriamiento de PacíficoTropical👇Se asocia a temperaturas relativamente bajas y Sequía en CostaOeste Sudamericana.climate.gov/news-features/…
El brazo de #LaNiña es largo, y al afectar los patrones de viento, contribuyó también a la activa temporada de #Huracanes q recién terminó en el Atlántico👇
#LaNina is forecast to likely continue through the Northern Hemisphere winter season (2020-21).
What does this mean for our region? La Niña typically results in a colder than normal winter for us.
However...not always. Once in a while, the opposite occurs. Remember the really warm winter of 2011-12? (80s in the Twin Cities in mid-March.)
That was a La Niña winter.
We have attached a graphic comparing US temperature anomalies during past La Niña winters.
That was a La Niña winter.
We have attached a graphic comparing US temperature anomalies during past La Niña winters.
@EmmanuelMacron The image on the left shows a fire from 1989, and the image on the right has been online since at least 2012. A number of other outdated and unrelated photographs have also been circulated as if they depicted the 2019 #AmazonFires.
snopes.com/fact-check/ama…
snopes.com/fact-check/ama…
@EmmanuelMacron Plankton that are plants, known as #phytoplankton, grow and get their own energy through photosynthesis and are responsible for producing an estimated 80% of the world’s oxygen. They need #CO2 to thrive.
eos.org/research-spotl…
eos.org/research-spotl…
@EmmanuelMacron Many use fire to maintain farmland or to clear land.
Typically, activity peaks in early Sept & mostly stops by Nov.
#NASA satellite data indicates total fire activity across the #AmazonBasin this year has been close to the average of the past 15 years.
earthobservatory.nasa.gov/images/145464/…
Typically, activity peaks in early Sept & mostly stops by Nov.
#NASA satellite data indicates total fire activity across the #AmazonBasin this year has been close to the average of the past 15 years.
earthobservatory.nasa.gov/images/145464/…
