Changing characteristics and spatial differentiation of spring precipitation in Southwest China during 1961–2012

Liu, Honglan; Zhang, Qiang; Zhang, Junguo; Hu, Wen-Chao; Jun-qin, Guo

doi:10.1088/1674-1056/24/2/029201

Cited by 5 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The empirical orthogonal function (EOF) analysis and rotated EOF (REOF) [17,18] are used to determine the basic characteristics of South China spring precipitation as well as their spatiotemporal structures of variability and change. Mann-Kendall testing method [17,18] is used to determine the temporal locations of abrupt changes of spring precipitation, at an a priori set = 0.05 significance level. The trend is a fifth order running trend and its statistical significance is also tested using nonparametric Mann-Kendall method.…”

Section: Methodsmentioning

confidence: 99%

“…The periodicity information of the spring precipitation is obtained using spectrum analysis. -testing [17,18] is also used to test statistical significance of abrupt changes. (a) (a) China.…”

Section: Methodsmentioning

confidence: 99%

“…To better quantify the multiscale nature of the South China spring precipitation, wavelet analysis [17,18] of spring Advances in Meteorology (a) precipitation of South China is carried out, with the corresponding results presented in Figure 7. The dominant timescales of variability of the South China spring precipitation are 7 years, 12 to 14 years, and 40 years.…”

Section: Multiscale Analysis Of the South China Spring Precipitationmentioning

confidence: 99%

“…To determine whether the spring precipitation of South China has experienced abrupt changes, we use Mann-Kendall [17,18] testing method to analyze area averaged precipitation series. Mann-Kendall testing method is a nonparametric method and widely used.…”

Section: Abrupt Changes Of Spring Precipitation In South Chinamentioning

confidence: 99%

“…An abrupt increment occurred in 1964 and an abrupt decrement occurred in 2002. These two abrupt changes are statistically significant at a significance level of = 0.05 ( 0.05 = ±1.96) [17,18].…”

Section: Abrupt Changes Of Spring Precipitation In South Chinamentioning

confidence: 99%

See 4 more Smart Citations

Spatiotemporal Variability and Change of the South China Spring Precipitation during 1961–2012

Liu¹,

Zhang

Jun-qin³

et al. 2015

Advances in Meteorology

Self Cite

View full text Add to dashboard Cite

We analyze precipitation data from 47 meteorological stations spanning between 1961 and 2012 and NCEP/NCAR reanalysis to understand spatiotemporal variability and change of spring precipitation of South China and their relations to atmospheric circulations. Empirical orthogonal function (EOF) analysis and rotated EOF (REOF) are used to reveal dominant spatial structures of precipitation anomaly and Mann-Kendall testing method to determine the temporal locations of abrupt changes during the analyzed time span. We find that the first spatial mode of the spring precipitation of the South China has a domain uniform structure; the second is dominated by a spatial dipole; and the third contains six variability centers. 1980s was the decade of the largest amount of precipitation while 1960s the decade of the smallest amount of precipitation. The spring precipitation also appeared to have a decreasing trend since 2000. We also find that spring precipitation of the South China has experienced a few abrupt changes: sudden increment at 1964, sudden decrement at 2002, and sudden increment at 1995. In addition to these abrupt changes, the precipitation could also be characterized by variability of multiple temporal scales, with dominant periodicities of 4 years, 8 years, and 14 years. The South China spring precipitation is also closely tied to the atmospheric circulations: when Aleutian Low strengthens, westerly weakens, and the center of the Western Pacific subtropical high shifts southeastward in the early spring; and the South China precipitation tends to be abundant (positive anomaly). In contrast, when Ural ridge strengthens, the southern branch of the East Asian trough weakens and the Western Pacific subtropical high shifts northwestward in the early spring, the South China precipitation tends to be reduced (negative anomaly).

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Multiscale Analysis Of the South China Spring Precipitationmentioning

confidence: 99%

Section: Abrupt Changes Of Spring Precipitation In South Chinamentioning

confidence: 99%

Section: Abrupt Changes Of Spring Precipitation In South Chinamentioning

confidence: 99%

See 3 more Smart Citations

Spatiotemporal Variability and Change of the South China Spring Precipitation during 1961–2012

Liu¹,

Zhang

Jun-qin³

et al. 2015

Advances in Meteorology

Self Cite

View full text Add to dashboard Cite

show abstract

Enhancement of the relationship between spring extreme precipitation over Southwest China and preceding winter sea surface temperature anomalies over the South Indian Ocean after the late 1980s

Nan

Sun

Zhang

et al. 2022

Intl Journal of Climatology

View full text Add to dashboard Cite

Spring extreme precipitation (SEP) significantly disturbs spring ploughing over Southwest China (SWC), bringing challenges for agricultural activities and production over the region. This study investigates the interannual relationship between SWC SEP and sea surface temperature (SST) in preceding winter, from a perspective of prediction. It is found that the dominate mode of SWC SEP interannual variability mainly reflects the variability over the eastern part. The variability of eastern SWC SEP has an enhanced connection with a dipole SST pattern over the South Indian Ocean in preceding winter after the late 1980s. Under the warmer SST background after the late 1980s, the South Indian Ocean dipole SST pattern can lead to significant convection activity over tropical central and western Indian Ocean. The tropical diabatic heating associated with enhanced convection can strengthen the western North Pacific anticyclone, which transports more water vapour to eastern SWC and induces stronger moisture convergence there, providing favourable moisture condition for the SEP occurrence. In addition, the dipole SST pattern can strengthen upward motion over eastern SWC through exiting a meridional circulation, providing a favourable dynamic condition for the SEP occurrence over there.In contrast, under the colder SST background before the late 1980s, the dipole SST pattern-related convection and atmospheric circulation anomalies are weak over the Indo-Pacific region. Therefore, the relationship of the dipole SST pattern with SEP over eastern SWC is weak before the late 1980s. The SST signals with one-season leading could provide valuable source for seasonal prediction of eastern SWC SEP variability after the late 1980s.

show abstract

Strengthened influence of the East Asian trough on spring extreme precipitation variability over eastern Southwest China after the late 1980s

Nan¹,

Sun²,

Zhang³

et al. 2022

Atmospheric and Oceanic Science Letters

View full text Add to dashboard Cite

Changing characteristics and spatial differentiation of spring precipitation in Southwest China during 1961–2012

Cited by 5 publications

References 10 publications

Spatiotemporal Variability and Change of the South China Spring Precipitation during 1961–2012

Spatiotemporal Variability and Change of the South China Spring Precipitation during 1961–2012

Enhancement of the relationship between spring extreme precipitation over Southwest China and preceding winter sea surface temperature anomalies over the South Indian Ocean after the late 1980s

Strengthened influence of the East Asian trough on spring extreme precipitation variability over eastern Southwest China after the late 1980s

Contact Info

Product

Resources

About