Assessment of 20th‐century reanalysis circulation patterns associated with El Niño–Southern Oscillation impacts on the tropical Atlantic and northeastern Brazil rainy season

2020 ◽  
Author(s):  
Enzo Pinheiro ◽  
Rosmeri Porfirio da Rocha ◽  
Anita Drumond
Keyword(s):  
20Th Century ◽  
El Niño ◽  
Rainy Season ◽  
El Nino ◽  
Southern Oscillation ◽  
Northeastern Brazil ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Tropical Atlantic ◽  
Circulation Patterns

scholarly journals ASSESSING CARBON SEQUESTRADED IN BRAZILIAN NORTHEASTERN BIOMES UNDER ENSO EVENTS

Gaia Scientia ◽  
2019 ◽  
Vol 13 (4) ◽  
Author(s):  
Robson de Sousa Nascimento ◽  
José Ivaldo Barbosa de Brito ◽  
Valéria Peixoto Borges
Keyword(s):  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
Net Primary Production ◽  
Amazon Rainforest ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Tropical Atlantic ◽  
Enso Events ◽  
Caatinga Biome

The goal of the present study it was to know the behavior of the Net Primary Production (NPP) in years that have occurred El Niño Southern Oscillation (ENSO) and during the temperature anomalies of the surface of the Sea (SST) in the Tropical Atlantic, that is Atlantic Dipole. The results showed that the Amazon Rainforest, Atlantic Forest, and the Cerrado were not enough affected by the occurrence of El Niño Southern Oscillation and Atlantic Dipole. However, the Caatinga biome has shown to be quite sensitive to these events and patterns, especially in years of occurrence of El Niño, which contributed to a reduction in NPP; while in years of El Niña and negative dipole, the NPP achieved the highest values. The amount of rainfall in the previous year to the El Niño Southern Oscillation episodes showed influence on the amount of carbon sequestered by biomes in the year of study.

scholarly journals El Niño-Southern oscillation and under-5 diarrhea in Botswana

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Alexandra K. Heaney ◽  
Jeffrey Shaman ◽  
Kathleen A. Alexander
Keyword(s):  
El Niño ◽  
Rainy Season ◽  
Diarrheal Disease ◽  
El Nino ◽  
Southern Oscillation ◽  
La Niña ◽  
Sub Saharan Africa ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
La Nina

AbstractChildhood diarrheal disease causes significant morbidity and mortality in low and middle-income countries, yet our ability to accurately predict diarrhea incidence remains limited. El Niño-Southern Oscillation (ENSO) has been shown to affect diarrhea dynamics in South America and Asia. However, understanding of its effects in sub-Saharan Africa, where the burden of under-5 diarrhea is high, remains inadequate. Here we investigate the connections between ENSO, local environmental conditions, and childhood diarrheal disease in Chobe District, Botswana. Our results demonstrate that La Niña conditions are associated with cooler temperatures, increased rainfall, and higher flooding in the Chobe region during the rainy season. In turn, La Niña conditions lagged 0–5 months are associated with higher than average incidence of under-5 diarrhea in the early rainy season. These findings demonstrate the potential use of ENSO as a long-lead prediction tool for childhood diarrhea in southern Africa.

scholarly journals KLIMATOLOGI BADAI PETIR DI WILAYAH JAKARTA DAN SEKITARNYA BERDASARKAN OBSERVASI SYNOP TAHUN 2000-2012

2016 ◽  
Vol 17 (1) ◽  
pp. 1
Author(s):  
Ardhi Adhary Arbain
Keyword(s):  
El Niño ◽  
Rainy Season ◽  
El Nino ◽  
Southern Oscillation ◽  
La Niña ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Madden Julian Oscillation ◽  
Peak Period ◽  
La Nina

IntisariKlimatologi badai petir (TS) dianalisis dengan memanfaatkan pengamatan SYNOP per 3-jam dari 8 stasiun cuaca BMKG yang berada di wilayah Jakarta dan sekitarnya selama periode tahun 2000-2012. Frekuensi kejadian TS pada tiap lokasi dihitung berdasarkan perbandingan antara jumlah laporan TS pada data SYNOP dengan jumlah total observasi yang dilakukan oleh stasiun yang bersangkutan. Hasil pengolahan data menunjukkan bahwa TS memiliki dua pola klimatologi yang dominan dan paling sering terjadi pada periode sebelum dan sesudah musim hujan, terutama pada bulan November dan April. Hasil analisis juga menunjukkan bahwa TS sangat bergantung pada topografi dari lokasi yang bersangkutan, yang mengindikasikan pengaruh kuat dari siklus harian akibat konveksi kuat dan pola angin darat-laut di wilayah Jakarta dan sekitarnya. Pada beberapa lokasi yang berdekatan dengan Teluk Jakarta, periode puncak kejadian TS juga terjadi pada puncak musim hujan akibat pengaruh dari monsun barat laut dan seruak dingin yang datang dari Laut Tiongkok Selatan. Variabilitas iklim global seperti ENSO (El Nino Southern Oscillation) dan MJO (Madden-Julian Oscillation) turut memberikan pengaruh signifikan terhadap frekuensi TS. Hasil analisis menunjukkan bahwa frekuensi TS mengalami peningkatan pada periode La Nina kuat, serta pada periode sebelum dan sesudah MJO melintasi Indonesia bagian barat.    AbstractThunderstorm (TS) climatology was analyzed by utilizing 3-hourly SYNOP observation of 8 BMKG’s weather stations in Jakarta capital and surrounding area during the period of 2000-2012. The frequency of TS occurrences at each location was calculated based on the ratio of TS reports to the total number of SYNOP observations conducted by the stations. The results show that the TS has two dominant climatological patterns in which most cases, the peak periods both preced and succeed the rainy season, especially in November and April. The results also imply that TS occurences are heavily influenced by the topography at each location, which indicate the great dependency of TS to the diurnal cycle generated by strong convective activity and land-sea breeze circulation over Jakarta and surronding regions. On the other hand, the peak period of TS at some locations close to Jakarta Bay, occurs simultaneously with the peak of rainy season by the influence of north-westerly monsoon and cold surge coming from the South China Sea. Global climate variabilities such as ENSO (El Nino Southern Oscillation) and MJO (Madden-Julian Oscillation) also significantly contribute to the anomaly of TS frequency. The results show an enhancement of TS frequency during the period of strong La Nina, as well as the period before and after MJO passes the western part of Indonesia. 

VARIABILIDAD CLIMÁTICA, CAMBIO CLIMÁTICO Y PESQUERÍAS EN EL ECUADOR.

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Johnny Chavarría Viteri ◽  
Dennis Tomalá Solano
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Pacific Decadal Oscillation ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Current Action ◽  
Palabras Clave

La variabilidad climática es la norma que ha modulado la vida en el planeta. Este trabajo demuestra que las pesquerías y acuicultura costera ecuatorianas no son la excepción, puesto que tales actividades están fuertemente influenciadas por la variabilidad ENSO (El Niño-Oscilación del Sur) y PDO (Oscilación Decadal del Pacífico), planteándose que la señal del cambio climático debe contribuir a esta influencia. Se destaca también que, en el análisis de los efectos de la variabilidad climática sobre los recursos pesqueros, el esfuerzo extractivo también debe ser considerado. Por su parte, la acción actual de la PDO está afectando la señal del cambio climático, encontrándose actualmente en fases opuestas. Se espera que estas señales entren en fase a finales de esta década, y principalmente durante la década de los 20 y consecuentemente se evidencien con mayor fuerza los efectos del Cambio Climático. Palabras Clave: Variabilidad Climática, Cambio Climático, ENSO, PDO, Pesquerías, Ecuador. ABSTRACT Climate variability is the standard that has modulated life in the planet. This work shows that the Ecuadorian  fisheries and aquaculture are not the exception, since such activities are strongly influenced by ENSO variability (El Niño - Southern Oscillation) and PDO (Pacific Decadal Oscillation), considering that the signal of climate change should contribute to this influence. It also emphasizes that in the analysis of the effects of climate variability on the fishing resources, the extractive effort must also be considered. For its part, the current action of the PDO is affecting the signal of climate change, now found on opposite phases. It is hoped that these signals come into phase at the end of this decade, and especially during the decade of the 20’s and more strongly evidencing the effects of climate change. Keywords: Climate variability, climate change, ENSO (El Niño - Southern Oscillation) and PDO  (Pacific Decadal Oscillation); fisheries, Ecuador. Recibido: mayo, 2012Aprobado: agosto, 2012

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