Strengthened Relationships of Northwest China Wintertime Precipitation with ENSO and Midlatitude North Atlantic SST since the Mid-1990s

Yin, Xiaoxue; Zhou, Lian-Tong

doi:10.1175/jcli-d-19-0454.1

Cited by 17 publications

(3 citation statements)

References 64 publications

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“…Our results suggest that enhanced Indian Ocean SSTs, enhanced Pacific Ocean SSTs, and weakened Asian summer winds contribute to the warming and humidification trend in eastern Xinjiang. This further supports the linkage of Indian Ocean SSTs [33,34], Pacific Ocean SSTs [35,36], and monsoon winds [37,38] with warming and humidification across the northwest. Meanwhile, understanding the influence mechanism of regional precipitation in eastern Xinjiang leads to a more accurate reference value for guiding local water resources management [39] as well as agricultural and livestock production [40].…”

Section: Driving Mechanism Of Precipitationsupporting

confidence: 72%

Climate Change in the Eastern Xinjiang of China and Its Connection to Northwestern Warm Humidification

Li,

Wang,

Chen

et al. 2023

Atmosphere

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Eastern Xinjiang, as a typical extremely arid area, exhibits a high sensitivity to climate change. Gaining a comprehensive understanding of the climatic changes in this region, along with their driving mechanisms, and comparing these with the broader trend of “warming and humidifying” in the Northwest can provide a scientific foundation for adapting to and addressing climate change. Based on a study of precipitation and temperature data from seven meteorological stations in Eastern Xinjiang from 1960 to 2022, the following findings were observed: (1) The climate of eastern Xinjiang is generally characterized by a warming and humidifying trend, with the rates of mean annual temperature and total annual precipitation being 0.39 °C/10 a and 3.32 mm/10 a. The eastern part of Xinjiang has less precipitation, with a lower growth rate than that of the neighboring regions, and higher temperatures, with a higher growth rate than that of the neighboring regions. (2) The first principal component of precipitation explains 47.85% of the variation in total precipitation, with a significant upward trend (p < 0.05) and an abrupt change in the late 1970s. It contains strong signals of regional precipitation, temperature, and dry and wet changes. (3) The increase in the first principal component of annual precipitation in eastern Xinjiang is mainly related to the warming of SSTs in the Indian Ocean and the central-eastern part of the tropical southern Pacific Ocean as well as the weakening of the Asian monsoon.

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Section: Driving Mechanism Of Precipitationsupporting

confidence: 72%

Climate Change in the Eastern Xinjiang of China and Its Connection to Northwestern Warm Humidification

Li,

Wang,

Chen

et al. 2023

Atmosphere

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“…These results also support that tropical Atlantic SSTAs should be paid more attentions. Yin and Zhou (2020) have investigated winter rainfall in Northwest China and possible impact of ENSO and mid‐latitude NA (30°N–50°N, 60°W–30°W) SSTAs, not for SC rainfall. It is found that the enhanced negative relationship between ENSO and mid‐latitude NA SSTAs after mid‐1990s can excite a Pacific‐North American–Eurasian‐like pattern independently, causing significant precipitation anomalies in Northwest China.…”

Section: Summary and Discussionmentioning

confidence: 99%

Combined impacts of sea surface temperature in tropical Pacific and North Atlantic Oceans on the winter rainfall in southern China under decadal background

Jiang

Zhu

et al. 2021

Intl Journal of Climatology

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The sea surface temperature anomalies (SSTAs) in the tropical Pacific (TP) and North Atlantic (NA) are both important factors regulating the winter rainfall over southern China (SC). Our results show the combined impact of SSTAs exhibits an offset effect before 1985, after a decadal transition period, the two SSTAs patterns form an additive effect on the interannual timescale after 1995. These distinct impacts of the TP and NA result in the southward shift of the winter rainfall variability, which is associated with the decadal change of the TP and NA. Both the background modes in TP and NA show a phase transition during the period 1985–1995, accompanied by the interannual variations of the SSTAs in two ocean basins before 1985 and after 1995. Before 1985, the canonical El Niño‐related southerly winds of the anticyclone over the western North Pacific transport sufficient water vapour and enhance rainfall in SC. While the concurrent dipole NA SSTA‐related wave train propagates to Eurasia, causing a cyclone and divergence of water vapour fluxes suppressing the local rainfall. After 1995, the El Niño‐related warm SSTAs move westward and strengthen the rainfall anomalies in the Yangtze River basin. Meanwhile, a tripole mode of SSTAs replaces the dipole counterpart in NA, resulting in the anomalous cyclonic circulation over South Asia with more rainfall in the south edge of SC. The decadal changes of the TP and NA mode combination could affect the seasonal distribution and prediction of China winter rainfall.

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“…Summer precipitation in EP El Niño years showed a three poles structure of rising in the north and south, but falling in center, while in central Pacific (CP) El Niño years, precipitation was mainly rising [27]. Many scholars have proposed that the correlation between precipitation and ENSO in China, including central [28,29], northwestern [30], northeastern [31], etc., was weak as a whole before the 1990s. After being affected by the change of the Philippine anticyclone [26], the warming of the tropical Indian Ocean [31], the phase anomaly of the sea temperature, and the change of the walker circulation, it significantly intensified [28].…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Variation Characteristics of Summer Precipitation in China and Its Response to ENSO

Chen,

Ma,

Liu

et al. 2023

Pol. J. Environ. Stud.

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This article was to reveal the spatio-temporal variation of summer precipitation in China and its response to El Niño-Southern Oscillation (ENSO). The results showed that the precipitation increased in 1900 s~1950 s, then decreased in 1960 s~1970 s, and increased in 1980 s~2010 s again. In space, it presented a "five-layered sandwich structure" featuring rising-falling-rising-falling-rising from northwest to southeast. The precipitation was generally less when ENSO occurred, but there were differences in intensities, regions, and so on. For example, When El Niño (all types) occurred, there was more precipitation in the western Continental Basin and the southern Huaihe River Basin, but less in the Yellow River Basin. When the extremely strong and medium La Niña occurred, the precipitation was more in the central and less in the north and the south. When the weak La Niña occurred, the precipitation increased in the northwest, decreased in the southeast, and vice versa for the extremely weak La Niña. Precipitation and Oceanic Niño Index (ONI) were negatively correlated in time, however, in space, there was a negative correlation in the north, and a positive correlation in the south, the dividing line was approximately at 29°N. In addition, the correlation between precipitation and ONI was proportional to the intensity of ENSO.

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Strengthened Relationships of Northwest China Wintertime Precipitation with ENSO and Midlatitude North Atlantic SST since the Mid-1990s

Cited by 17 publications

References 64 publications

Climate Change in the Eastern Xinjiang of China and Its Connection to Northwestern Warm Humidification

Climate Change in the Eastern Xinjiang of China and Its Connection to Northwestern Warm Humidification

Combined impacts of sea surface temperature in tropical Pacific and North Atlantic Oceans on the winter rainfall in southern China under decadal background

Spatio-Temporal Variation Characteristics of Summer Precipitation in China and Its Response to ENSO

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