On the Relationship of Variance Spectra of Temperature to the Large-Scale Atmospheric Circulation

1971 ◽  
Vol 10 (2) ◽  
pp. 186-193 ◽  
Author(s):  
Robert R. Dickson
Keyword(s):  
Atmospheric Circulation ◽  
Large Scale ◽  
Relationship Of ◽  
The Relationship ◽  
Large Scale Atmospheric Circulation

Changes of the relationship between spring sand dust frequency and large-scale atmospheric circulation

2019 ◽  
Vol 226 ◽  
pp. 102-109 ◽  
Author(s):  
Mingzhu Yang ◽  
Xiaying Zhu ◽  
Hongxing Pan ◽  
Wanxiu Ai ◽  
Wenling Song ◽  
...  
Keyword(s):  
Atmospheric Circulation ◽  
Large Scale ◽  
The Relationship ◽  
Large Scale Atmospheric Circulation ◽  
Sand Dust

scholarly journals Stable isotope compositions of precipitation over Central Asia

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11312
Author(s):  
Junqiang Yao ◽  
Xinchun Liu ◽  
Wenfeng Hu
Keyword(s):  
Central Asia ◽  
Atmospheric Circulation ◽  
Moisture Transport ◽  
Environmental Variables ◽  
Large Scale ◽  
Meteoric Water ◽  
Water Cycle ◽  
East Asian Monsoon ◽  
The Relationship ◽  
Large Scale Atmospheric Circulation

Central Asia is one of the driest regions in the world with a unique water cycle and a complex moisture transport process. However, there is little information on the precipitation δ18O content in Central Asia. We compiled a precipitation δ18O database from 47 meteorological stations across Central Asia to reveal its spatial-temporal characteristics. We determined the relationship between precipitation δ18O and environmental variables and investigated the relationship between δ18O and large-scale atmospheric circulation. The Central Asia meteoric water line was established as δ2H = 7.30 δ18O + 3.12 (R2 = 0.95, n = 727, p < 0.01), and precipitation δ18O ranged from +2‰ to −25.4‰ with a mean of −8.7‰. The precipitation δ18O over Central Asia was related to environmental variables. The δ18O had a significant positive correlation with temperature, and the δ18O-temperature gradient ranged from 0.28‰/°C to 0.68‰/°C. However, the dependence of δ18O on precipitation was unclear; a significant precipitation effect was only observed at the Zhangye and Teheran stations, showing δ18O-precipitation gradients of 0.20‰/mm and −0.08‰/mm, respectively. Latitude and altitude were always significantly correlated with annual δ18O, when considering geographical controls on δ18O, with δ18O/LAT and δ18O/ALT gradients of −0.42‰/° and −0.001‰/m, respectively. But both latitude and longitude were significantly correlated with δ18O in winter. The relationship between δ18O and large-scale atmospheric circulation suggested that the moisture in Central Asia is mainly transported by westerly circulation and is indirectly affected by the Indian monsoon. Meanwhile, the East Asian monsoon may affect the precipitation δ18O content in westerly and monsoon transition regions. These results improve our understanding of the precipitation δ18O and moisture transport in Central Asia, as well as the paleoclimatology and hydrology processes in Central Asia.

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