scholarly journals Intraseasonal variability of winter precipitation over central asia and the western tibetan plateau from 1979 to 2013 and its relationship with the North Atlantic Oscillation

2017 ◽  
Vol 79 ◽  
pp. 31-42 ◽  
Author(s):  
Heng Liu ◽  
Xiaodong Liu ◽  
Buwen Dong
Keyword(s):  
Tibetan Plateau ◽  
North Atlantic Oscillation ◽  
Central Asia ◽  
North Atlantic ◽  
Intraseasonal Variability ◽  
Winter Precipitation ◽  
The North ◽  
Western Tibetan Plateau ◽  
The North Atlantic ◽  
The North Atlantic Oscillation

scholarly journals An Observed Connection between the North Atlantic Oscillation and the Madden–Julian Oscillation

2009 ◽  
Vol 22 (2) ◽  
pp. 364-380 ◽  
Author(s):  
Hai Lin ◽  
Gilbert Brunet ◽  
Jacques Derome
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Wave Train ◽  
Intraseasonal Variability ◽  
Winter Season ◽  
Tropical Indian Ocean ◽  
Madden Julian Oscillation ◽  
The North ◽  
The North Atlantic ◽  
The North Atlantic Oscillation

Abstract Based on the bivariate Madden–Julian oscillation (MJO) index defined by Wheeler and Hendon and 25 yr (1979–2004) of pentad data, the association between the North Atlantic Oscillation (NAO) and the MJO on the intraseasonal time scale during the Northern Hemisphere winter season is analyzed. Time-lagged composites and probability analysis of the NAO index for different phases of the MJO reveal a statistically significant two-way connection between the NAO and the tropical convection of the MJO. A significant increase of the NAO amplitude happens about 5–15 days after the MJO-related convection anomaly reaches the tropical Indian Ocean and western Pacific region. The development of the NAO is associated with a Rossby wave train in the upstream Pacific and North American region. In the Atlantic and African sector, there is an extratropical influence on the tropical intraseasonal variability. Certain phases of the MJO are preceded by the occurrence of strong NAOs. A significant change of upper zonal wind in the tropical Atlantic is caused by a modulated transient westerly momentum flux convergence associated with the NAO.

scholarly journals The north atlantic oscillation and winter precipitation totals in Slovakia

2013 ◽  
Vol 21 (4) ◽  
pp. 38-49 ◽  
Author(s):  
Labudová Lívia ◽  
Pavel Šťastný ◽  
Milan Trizna
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
Correlation Coefficients ◽  
Winter Precipitation ◽  
The North ◽  
Northern Atlantic ◽  
The North Atlantic ◽  
The North Atlantic Oscillation ◽  
The Relationship ◽  
Spearman’S Correlation

Abstract The North Atlantic Oscillation (NAO) is the most important circulation phenomenon in the Northern Atlantic which impacts climate in Europe in various ways. Precipitation is a basic climatic element which affects the landscape significantly. Therefore in this paper, the relationship between the NAO and winter precipitation in Slovakia is analysed. A Spearman’s correlation analysis was used, which detected the impacts of NAO on the above-mentioned seasonal precipitation in different regions of Slovakia. The correlation coefficients obtained positive values in the region of Orava and Kysuce and changed to negative ones in a southward direction. The detected zonal configuration can be explained by the topographic barrier effect of the Carpathians

Malthus and the North Atlantic Oscillation: A Reply to Kyle Harper

2016 ◽  
Vol 46 (4) ◽  
pp. 563-578
Author(s):  
John L. Brooke
Keyword(s):  
Climate Change ◽  
North Atlantic Oscillation ◽  
Central Asia ◽  
North Atlantic ◽  
Large Scale ◽  
Classical Antiquity ◽  
The North ◽  
The North Atlantic ◽  
The North Atlantic Oscillation ◽  
The Impact

Subsequent to Harper’s review essay centered on Brooke’s Climate Change and the Course of Global History: A Rough Journey, Brooke concedes that he could have focused more attention on the problem of the Malthusian trap. He stresses, nevertheless, that his reservations regarding the concept of Malthusian crises in pre-industrial societies are well placed, given the concept’s prominence in the large-scale environmental histories written during the past several decades. Turning to the impact of climate change in late classical antiquity, Brooke discusses established and new evidence for increasing, sometimes catastrophic, precipitation from the Mediterranean area into central Asia after a.d. 500 and after 1250, as a result of shifts toward the negative mode of the North Atlantic Oscillation. He also surveys the evidence for emerging arguments that this cooling-driven precipitation may have triggered outbreaks of bubonic plague in Central Asia.

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