Interannual Variation and Regime Shift of the Evaporative Moisture Sources for Wintertime Precipitation Over Southern China

Zifan Yang; Wenyu Huang; Tianpei Qiu; Xinsheng He; Jonathon S. Wright; Bin Wang

doi:10.1029/2018JD029513

Interannual Variation and Regime Shift of the Evaporative Moisture Sources for Wintertime Precipitation Over Southern China

Zifan Yang
, Wenyu Huang
, Tianpei Qiu
, Xinsheng He
, Jonathon S. Wright
, Bin Wang

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The evaporative moisture source for wintertime precipitation over southern China during 1979–2017 is determined using a Lagrangian methodology. The five most important moisture source regions, in descending order, are the South China Sea, southern China (local moisture recycling), southeastern Asia, the East China Sea, and the western North Pacific. The dominant mode of variability of moisture contribution appears at the interannual time scale, which is closely related to the El Niño Southern Oscillation variability. The conventional El Niño signal favors moisture transport from the surrounding moisture source regions through an enhancement of an anticyclonic anomaly over the western North Pacific, while El Niño Modoki drives moisture recycling over southern China by cutting off access to moisture sources from surrounding regions. A regime shift of the evaporative moisture source is identified to occur around 1991/1992, after which there was a significant eastward migration of the moisture source. This migration is closely related to the presence of a cyclonic anomaly over the South China Sea. Both the observational and experimental results reveal that the appearance of this cyclonic anomaly is due to the warming over the Maritime Continent during the last two decades.

Original language	English
Pages (from-to)	13,168-13,185
Journal	Journal of Geophysical Research: Atmospheres
Volume	123
Issue number	23
DOIs	https://doi.org/10.1029/2018JD029513
State	Published - Dec 16 2018
Externally published	Yes

Funding

We thank the Editors and three anonymous reviewers for constructive comments that led to improvement of the manuscript. Bin Wang acknowledges the National Natural Science Foundation of China (41875127 and 91737307). Wenyu Huang acknowledges the National Natural Science Foundation of China (41505063) and the China Meteorological Welfare Research Fund (GYHY201406007). The ERA-Interim reanalysis data set is available at https://www.ecmwf.int/en/forecasts/ datasets/reanalysis-datasets/era-interim. The observed precipitation compiled by the China Meteorological Administration is available at http://data.cma.cn/en/?r=data/ detail&dataCode=SURF_CLI_CHN_MUL_ DAY_CES_V3.0. The HadISST data set can be accessed at https://www. metoffice.gov.uk/hadobs/hadisst/.

Keywords

Lagrangian approach
eastward migration
evaporative moisture source
interannual variation
regime shift

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10.1029/2018JD029513

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title = "Interannual Variation and Regime Shift of the Evaporative Moisture Sources for Wintertime Precipitation Over Southern China",

abstract = "The evaporative moisture source for wintertime precipitation over southern China during 1979–2017 is determined using a Lagrangian methodology. The five most important moisture source regions, in descending order, are the South China Sea, southern China (local moisture recycling), southeastern Asia, the East China Sea, and the western North Pacific. The dominant mode of variability of moisture contribution appears at the interannual time scale, which is closely related to the El Ni{\~n}o Southern Oscillation variability. The conventional El Ni{\~n}o signal favors moisture transport from the surrounding moisture source regions through an enhancement of an anticyclonic anomaly over the western North Pacific, while El Ni{\~n}o Modoki drives moisture recycling over southern China by cutting off access to moisture sources from surrounding regions. A regime shift of the evaporative moisture source is identified to occur around 1991/1992, after which there was a significant eastward migration of the moisture source. This migration is closely related to the presence of a cyclonic anomaly over the South China Sea. Both the observational and experimental results reveal that the appearance of this cyclonic anomaly is due to the warming over the Maritime Continent during the last two decades.",

keywords = "Lagrangian approach, eastward migration, evaporative moisture source, interannual variation, regime shift",

author = "Zifan Yang and Wenyu Huang and Tianpei Qiu and Xinsheng He and Wright, \{Jonathon S.\} and Bin Wang",

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doi = "10.1029/2018JD029513",

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T1 - Interannual Variation and Regime Shift of the Evaporative Moisture Sources for Wintertime Precipitation Over Southern China

AU - Yang, Zifan

AU - Huang, Wenyu

AU - Qiu, Tianpei

AU - He, Xinsheng

AU - Wright, Jonathon S.

AU - Wang, Bin

PY - 2018/12/16

Y1 - 2018/12/16

N2 - The evaporative moisture source for wintertime precipitation over southern China during 1979–2017 is determined using a Lagrangian methodology. The five most important moisture source regions, in descending order, are the South China Sea, southern China (local moisture recycling), southeastern Asia, the East China Sea, and the western North Pacific. The dominant mode of variability of moisture contribution appears at the interannual time scale, which is closely related to the El Niño Southern Oscillation variability. The conventional El Niño signal favors moisture transport from the surrounding moisture source regions through an enhancement of an anticyclonic anomaly over the western North Pacific, while El Niño Modoki drives moisture recycling over southern China by cutting off access to moisture sources from surrounding regions. A regime shift of the evaporative moisture source is identified to occur around 1991/1992, after which there was a significant eastward migration of the moisture source. This migration is closely related to the presence of a cyclonic anomaly over the South China Sea. Both the observational and experimental results reveal that the appearance of this cyclonic anomaly is due to the warming over the Maritime Continent during the last two decades.

AB - The evaporative moisture source for wintertime precipitation over southern China during 1979–2017 is determined using a Lagrangian methodology. The five most important moisture source regions, in descending order, are the South China Sea, southern China (local moisture recycling), southeastern Asia, the East China Sea, and the western North Pacific. The dominant mode of variability of moisture contribution appears at the interannual time scale, which is closely related to the El Niño Southern Oscillation variability. The conventional El Niño signal favors moisture transport from the surrounding moisture source regions through an enhancement of an anticyclonic anomaly over the western North Pacific, while El Niño Modoki drives moisture recycling over southern China by cutting off access to moisture sources from surrounding regions. A regime shift of the evaporative moisture source is identified to occur around 1991/1992, after which there was a significant eastward migration of the moisture source. This migration is closely related to the presence of a cyclonic anomaly over the South China Sea. Both the observational and experimental results reveal that the appearance of this cyclonic anomaly is due to the warming over the Maritime Continent during the last two decades.

KW - Lagrangian approach

KW - eastward migration

KW - evaporative moisture source

KW - interannual variation

KW - regime shift

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M3 - Article

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JF - Journal of Geophysical Research: Atmospheres

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ER -

Interannual Variation and Regime Shift of the Evaporative Moisture Sources for Wintertime Precipitation Over Southern China

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