scholarly journals The 2011 southeast Queensland extreme summer rainfall: A confirmation of a negative Pacific Decadal Oscillation phase?

2012 ◽  
Vol 39 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Wenju Cai ◽  
Peter van Rensch
Keyword(s):  
Pacific Decadal Oscillation ◽  
Summer Rainfall ◽  
Oscillation Phase ◽  
Pacific Decadal Oscillation Phase ◽  
Southeast Queensland

Detecting early warning signal of the Pacific Decadal Oscillation phase  transition using complex network analysis 

2021 ◽  
Author(s):  
Zhenghui Lu ◽  
Naiming Yuan ◽  
Qing Yang ◽  
Zhuguo Ma ◽  
Juergen Kurths
Keyword(s):  
Phase Transition ◽  
Network Analysis ◽  
Pacific Decadal Oscillation ◽  
Early Warning ◽  
Heat Content ◽  
Warning Signal ◽  
Oscillation Phase ◽  
The Pacific ◽  
Pacific Decadal Oscillation Phase ◽  
Efficient Prediction

<p><span>Obtaining an efficient prediction of the Pacific Decadal Oscillation (PDO) phase transition </span><span>is a worldwide challenge. Here, we employed the climate network analysis to uncover early </span><span>warning signals prior to a PDO phase transition. This way an examination of cooperative </span><span>behavior in the PDO region revealed an enhanced signal that propagated from the western </span><span>Pacific to the northwest coast of North America. The detection of this signal corresponds </span><span>very well to the time when the upper ocean heat content in the off-equatorial northwestern </span><span>tropical Pacific reaches a threshold, in which case a PDO phase transition may be expected </span><span>with the arising of the next El Niño/La Niña event. The objectively detected early warning </span><span>signal successfully forewarned all the six PDO phase transitions from the 1890s to 2000s, and </span><span>also underpinned the possible PDO phase transition around 2015, which may be triggered </span><span>by the strong El Niño event in 2015-2016.</span></p>

scholarly journals Influence of the Pacific Decadal Oscillation on the Relationship between El Niño and the Northeast Asian Summer Monsoon

2010 ◽  
Vol 23 (17) ◽  
pp. 4525-4537 ◽  
Author(s):  
Jinhee Yoon ◽  
Sang-Wook Yeh
Keyword(s):  
Pacific Decadal Oscillation ◽  
El Niño ◽  
El Nino ◽  
Asian Summer Monsoon ◽  
Northeast Asia ◽  
Summer Rainfall ◽  
The Pacific ◽  
Asian Summer ◽  
Northeast Asian ◽  
The Relationship

Abstract The influence of the Pacific decadal oscillation (PDO) on the relationship between El Niño and the northeast Asian summer monsoon (NEASM) is examined using observational datasets for the period of 1979–2007. When El Niño occurs during the boreal winter (December–February), the amount of rainfall over northeast Asia is usually above normal during the following summer (June–August). This relationship between El Niño and the NEASM is intensified when El Niño and the PDO are in phase during the previous winter. However, when El Niño and the PDO are out of phase, the relationship is weakened. The authors argue that the PDO can constructively or destructively interfere with the summer rainfall response over northeast Asia to El Niño. They follow the hypothesis that the summer rainfall over northeast Asia could be separated into two components, that is, the tropics-related component and the extratropics-related component. Then they argue that the PDO could modulate the relationship between El Niño and the NEASM through changes in the extratropics-related rainfall, which is associated with the atmospheric circulation, such as the Eurasian pattern. The conditional composites show that when El Niño and the PDO are in phase, the Eurasian-like pattern acts to enhance the extratropics-related rainfall over northeast Asia, resulting in the strengthening of the NEASM. In contrast, the Eurasian-like pattern acts to reduce the extratropics-related rainfall when El Niño and the PDO are out of phase, resulting in the weakening of the NEASM.

Early warning of the Pacific Decadal Oscillation phase transition using complex network analysis

2020 ◽  
Author(s):  
Zhenghui Lu ◽  
Naiming Yuan ◽  
Zhuguo Ma ◽  
Qing Yang ◽  
Juergen Kurths
Keyword(s):  
Phase Transition ◽  
Network Analysis ◽  
Pacific Decadal Oscillation ◽  
Early Warning ◽  
Global Climate ◽  
Kuroshio Extension ◽  
Human Society ◽  
Decadal Climate Variability ◽  
Oscillation Phase ◽  
The Pacific

<p>The different phases of the Pacific Decadal Oscillation (PDO) are a primary source of internal decadal climate variability which have distinct impacts on global climate and human society. However, obtaining a reliable prediction of the PDO phase transition is still challenging. Here, we employed the new technique of climate network analysis to uncover early warning signals prior to a PDO phase transition. An examination of cooperative behaviors in the PDO region revealed an enhanced signal that propagated from the western Pacific, passed through the Kuroshio extension (KE) and the subtropical oceanic frontal (STF) regions, and finally reached the northwest coast of the Americas. This signal captured all six of the PDO phase transitions from the 1890s to 2000s, with a warning time of 6.5±2.3 years in advance. It also underpinned the possible PDO phase transition at years around 2015, which may be triggered by the strong El Niño in 2014-2016.</p>

The Archaeology of the Peel Island Lazaret: Part 1: Survey

2002 ◽  
Vol 13 ◽  
pp. 31 ◽  
Author(s):  
Jonathan Prangnell
Keyword(s):  
Conservation Planning ◽  
Archaeological Survey ◽  
Landscape Modification ◽  
Moreton Bay ◽  
Nineteenth And Twentieth Centuries ◽  
Southeast Queensland

<p>An archaeological survey on Peel Island in Moreton Bay, southeast Queensland, was conducted to assist the conservation planning for the Peel Island Lazaret (PIL), one of a number of institutions housed on the island during the nineteenth and twentieth centuries. The survey revealed a patterning of artefacts across the island as well as landscape modification related to its Aboriginal and European institutional uses.</p>

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

scholarly journals Moisture source variations for summer rainfall in different intensity classes over Huaihe River Valley, China

2021 ◽  
Author(s):  
Yubo Liu ◽  
Chi Zhang ◽  
Qiuhong Tang ◽  
Seyed-Mohammad Hosseini-Moghari ◽  
Gebremedhin Gebremeskel Haile ◽  
...  
Keyword(s):  
Summer Rainfall ◽  
River Valley ◽  
Huaihe River ◽  
Moisture Source ◽  
Huaihe River Valley
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