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Title: The influence of the Pacific Decadal Oscillation on North Central China precipitation during boreal autumn

Abstract

ABSTRACT Decadal variations in autumn (September–October–November, SON) precipitation over North Central China since the 1940s are investigated using observations and reanalysis data. They are found to be significantly correlated negatively with the Pacific Decadal Oscillation (PDO). Further analyses indicate that the inter‐decadal changes in SON precipitation over North Central China result from anomaly patterns in the large‐scale atmospheric circulation in the mid‐latitude Northern Hemisphere associated with the PDO. Specifically, during the negative phase of the PDO (1945–1976 and 2003–2014), an anomalous low pressure and cyclonic circulation are seen west of Lake Baikal, while positive pressure anomalies are located over the East Asia‐Japan‐North Pacific region, which weakens the East Asian trough (EAT). The weakened EAT favours southerly winds over North Central China. The negative pressure anomalies around Mongolia and Lake Baikal induce large‐scale ascent motion to the west of the EAT, which also produces southerly advection of warm and moist air into North Central China, leading to increased precipitation there. These results reinforce the notion that PDO has a large impact on SON rainfall over North Central China on decadal timescales and highlight the need to further examine how the PDO induces the Eurasia atmospheric teleconnection pattern (e.g. East Atlantic/Western Russiamore » pattern).« less

Authors:
 [1];  [2];  [3]; ORCiD logo [1];  [2]
  1. Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC‐FEMD) Nanjing University of Information Science &, Technology China, Department of Atmospheric and Environmental Sciences University at Albany, State University of New York NY USA
  2. Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC‐FEMD) Nanjing University of Information Science &, Technology China
  3. Department of Atmospheric and Environmental Sciences University at Albany, State University of New York NY USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1435488
Grant/Contract Number:  
DE‐SC0012602
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
International Journal of Climatology
Additional Journal Information:
Journal Name: International Journal of Climatology Journal Volume: 38 Journal Issue: S1; Journal ID: ISSN 0899-8418
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Qin, Minhua, Li, Dongliang, Dai, Aiguo, Hua, Wenjian, and Ma, Hedi. The influence of the Pacific Decadal Oscillation on North Central China precipitation during boreal autumn. United Kingdom: N. p., 2018. Web. doi:10.1002/joc.5410.
Qin, Minhua, Li, Dongliang, Dai, Aiguo, Hua, Wenjian, & Ma, Hedi. The influence of the Pacific Decadal Oscillation on North Central China precipitation during boreal autumn. United Kingdom. https://doi.org/10.1002/joc.5410
Qin, Minhua, Li, Dongliang, Dai, Aiguo, Hua, Wenjian, and Ma, Hedi. 2018. "The influence of the Pacific Decadal Oscillation on North Central China precipitation during boreal autumn". United Kingdom. https://doi.org/10.1002/joc.5410.
@article{osti_1435488,
title = {The influence of the Pacific Decadal Oscillation on North Central China precipitation during boreal autumn},
author = {Qin, Minhua and Li, Dongliang and Dai, Aiguo and Hua, Wenjian and Ma, Hedi},
abstractNote = {ABSTRACT Decadal variations in autumn (September–October–November, SON) precipitation over North Central China since the 1940s are investigated using observations and reanalysis data. They are found to be significantly correlated negatively with the Pacific Decadal Oscillation (PDO). Further analyses indicate that the inter‐decadal changes in SON precipitation over North Central China result from anomaly patterns in the large‐scale atmospheric circulation in the mid‐latitude Northern Hemisphere associated with the PDO. Specifically, during the negative phase of the PDO (1945–1976 and 2003–2014), an anomalous low pressure and cyclonic circulation are seen west of Lake Baikal, while positive pressure anomalies are located over the East Asia‐Japan‐North Pacific region, which weakens the East Asian trough (EAT). The weakened EAT favours southerly winds over North Central China. The negative pressure anomalies around Mongolia and Lake Baikal induce large‐scale ascent motion to the west of the EAT, which also produces southerly advection of warm and moist air into North Central China, leading to increased precipitation there. These results reinforce the notion that PDO has a large impact on SON rainfall over North Central China on decadal timescales and highlight the need to further examine how the PDO induces the Eurasia atmospheric teleconnection pattern (e.g. East Atlantic/Western Russia pattern).},
doi = {10.1002/joc.5410},
url = {https://www.osti.gov/biblio/1435488}, journal = {International Journal of Climatology},
issn = {0899-8418},
number = S1,
volume = 38,
place = {United Kingdom},
year = {Mon Jan 08 00:00:00 EST 2018},
month = {Mon Jan 08 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at https://doi.org/10.1002/joc.5410

Citation Metrics:
Cited by: 22 works
Citation information provided by
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