Modulation of the Pacific Decadal Oscillation on the summer precipitation over East China: a comparison of observations to 600-years control run of Bergen Climate Model

Lei, Yu; Furevik, Tore; Otterå, Odd Helge; Gao, Yongqi

doi:10.1007/s00382-014-2141-5

Cited by 90 publications

(61 citation statements)

References 50 publications

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“…An overall oscillation in regional mean ET 0 is found in China, which was not revealed by the previous studies, suggesting that the variation of ET 0 from 1961 to 2011 should be a phenomenon of earth’s atmospheric circulation. PDO is considered as the important earth’s climatic driving power for the continental hydro-meteorology abnormality such as shift of dry/wet in Asia, especially in China30313233. The PDO driven climate oscillations impart clear influences to the regional ET 0 in China as a whole, indicated by significant negative correlation between annual PDO index and annual mean ET 0 ( r = −0.384; p < 0.001).…”

Section: Resultsmentioning

confidence: 99%

Periodic fluctuation of reference evapotranspiration during the past five decades: Does Evaporation Paradox really exist in China?

Xing

Shao

et al. 2016

Sci Rep

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Evidence that the pan evaporation or reference evapotranspiration (ET0) as the indicator of atmospheric evaporation capability have decreased along with the continuous increase in temperature over the past decades (coined as “evaporation paradox”) has been reported worldwide. Here, we provide a nationwide investigation of spatiotemporal change of ET0 using meteorological data from 602 stations with the updated data (1961–2011). In addition, we explore the trigger mechanism by quantitative assessment on the contribution of climatic factors to ET0 change based on a differential equation method. In despite of different shift points regionally, our results suggest that the ET0 generally present decadal variations rather than monotonic response to climate change reported in previous studies. The significant decrease in net radiation dominate the decrease in ET0 before early 1990s in southern regions, while observed near-surface wind speed is the primary contributor to the variations of ET0 for the rest regions during the same periods. The enhancements of atmospheric evaporation capability after early 1990s are driven primarily by recent relative humidity limitation in China. From a continental scale view, as highly correlating with to Pacific Decadal Oscillation, the shift behaviors of ET0 is likely an episodic phenomenon of the ocean-atmosphere interaction in earth.

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Section: Resultsmentioning

confidence: 99%

Periodic fluctuation of reference evapotranspiration during the past five decades: Does Evaporation Paradox really exist in China?

Xing

Shao

et al. 2016

Sci Rep

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“…The successful simulation of the rainfall decadal shift is based on the successful simulation of the three-dimensional spatial structure of the decadal variation of EASM circulation. Several factors are responsible for the decadal variation of EASM and the associated rainfall, including the decadal modulation of EI Niño-Southern Oscillation (ENSO)25, Tropical Indian Ocean warming4, PDO phase transition12, SST variation in the Atlantic26, etc. It shall be noted that these signals are all from the ocean, and some of them can be regarded as the internal variability of the climate system.…”

Section: Resultsmentioning

confidence: 99%

“…AMIP-type numerical experiments implied that the recent warming over the tropical oceans, especially those associated with the PDO centered over the central and eastern Pacific, has played a major role in the weakening of the EASM during recent decades10. Numerical experiments further demonstrated that the shift of PDO from positive to negative phase probably induces warming of the Lake Baikal and the weakening of the westerly jet through the air-sea interaction in the Pacific, changing the summer precipitation pattern in East China1112. Some studies argue that, apart from PDO, Atlantic multi-decadal oscillation (AMO) can also modulate the decadal variation of the EASM through the air-sea coupled processes in the Indian Ocean and North Pacific13.…”

mentioning

confidence: 93%

Decadal shifts of East Asian summer monsoon in a climate model free of explicit GHGs and aerosols

Lin

Zhu

Zheng

2016

Sci Rep

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The East Asian summer monsoon (EASM) experienced decadal transitions over the past few decades, and the associated "wetter-South-drier-North" shifts in rainfall patterns in China significantly affected the social and economic development in China. Two viewpoints stand out to explain these decadal shifts, regarding the shifts either a result of internal variability of climate system or that of external forcings (e.g. greenhouse gases (GHGs) and anthropogenic aerosols). However, most climate models, for example, the Atmospheric Model Intercomparison Project (AMIP)-type simulations and the Coupled Model Intercomparison Project (CMIP)-type simulations, fail to simulate the variation patterns, leaving the mechanisms responsible for these shifts still open to dispute. In this study, we conducted a successful simulation of these decadal transitions in a coupled model where we applied ocean data assimilation in the model free of explicit aerosols and GHGs forcing. The associated decadal shifts of the three-dimensional spatial structure in the 1990s, including the eastward retreat, the northward shift of the western Pacific subtropical high (WPSH), and the south-cool-north-warm pattern of the upper-level tropospheric temperature, were all well captured. Our simulation supports the argument that the variations of the oceanic fields are the dominant factor responsible for the EASM decadal transitions.

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“…Yu et al (2015) recently pointed out that the existence of warm winter sea surface temperatures during positive PDO phases in the eastern subtropical Pacific would propagate to the tropics in the following summer due to the weakening of the oceanic meridional circulation and the existence of a coupled wind-evaporation-SST feedback mechanism, and would thus result in a warming in the eastern tropical Pacific Ocean in summer. As a consequence, these events would lead to increased summer precipitation over the Yangtze River and decreased precipitation over North China.…”

Section: Discussionmentioning

confidence: 99%

500-yr. precipitation variability in Southern Taihang Mountains, China, and its linkages to ENSO and PDO

et al. 2016

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An annually resolved and absolutely dated ring-width chronology spanning 657 yrs. is constructed with Whitebark pine (Pinus bungeana Zucc.) samples from the southern Taihang Mountains, Eastern China. On the basis of a significant correlation between the tree-ring width index and observed instrumental data, precipitation in current May is reconstructed for the region since AD 1510, with predictor variables accounting for 37.9 % of the variance in precipitation data.130 yrs cycles at the 95 % confidence level for the reconstructed series over the past 500 yrs, suggesting possible linkages with the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO). Correlation analysis between the tree-ring series, ENSO, and PDO index further demonstrates that precipitation is negatively correlated with PDO and ENSO in the long term.

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Modulation of the Pacific Decadal Oscillation on the summer precipitation over East China: a comparison of observations to 600-years control run of Bergen Climate Model

Abstract: Observations show that the summer precipitation over East China often goes through decadal variations of opposite sign over North

Cited by 90 publications

References 50 publications

Periodic fluctuation of reference evapotranspiration during the past five decades: Does Evaporation Paradox really exist in China?

Periodic fluctuation of reference evapotranspiration during the past five decades: Does Evaporation Paradox really exist in China?

Decadal shifts of East Asian summer monsoon in a climate model free of explicit GHGs and aerosols

500-yr. precipitation variability in Southern Taihang Mountains, China, and its linkages to ENSO and PDO

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