The decadal shift of the long persistent rainfall over the northern part of China and the associated ocean conditions

Yan, Peng; Huang, Danqing; Zhu, Jieshun; Kuang, Xueyuan; Huang, Ying

doi:10.1002/joc.6001

Cited by 8 publications

(4 citation statements)

References 73 publications

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“…Rainfall is determined by both the circulation and the moisture conditions. Subtropical highs, westerlies, and other planetary-scale systems also have intraseasonal, seasonal, interannual, even interdecadal differences (e.g., Chen and Weng, 1999;Teng and Wang, 2003;Yang and Li, 2016;Huang et al, 2017;Huang et al, 2019;Yan et al, 2019;Zhang et al, 2019). According to the quantitative diagnosis method of multiscale interactions , some studies indicated that the rainfall ISO could be affected not only by intraseasonal activities but also by higher frequency disturbances (e.g., Maloney and Dickinson, 2003;Ren et al, 2011;.…”

Section: Introductionmentioning

confidence: 99%

The 10–30‐day oscillation of winter rainfall in southern China and its relationship with circulation patterns in different latitudes

Yao

Tong

et al. 2019

Intl Journal of Climatology

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Intraseasonal oscillation (ISO) of winter rainfall in southern China and its relationship with the circulation patterns in different latitudes are investigated using ERA-Interim reanalysis data and observations. The results show that the rainfall in southern China has obvious ISO characteristics, with a dominant period of 10-30 days. The convergence of the whole layer integral water vapour flux can satisfactorily represent the rainfall rate, and the intraseasonal (10-30-day filtered) rainfall is converted into a function of different time scale wind and water vapour. At the intraseasonal time scale, rainfall (10-30-day filtered) is determined by both the 10-30-day wind and the background (greater than 30 days) moisture. Nine days before the peak day of the intraseasonal rainfall in southern China, there is an abnormal low-pressure system (10-30-day filtered) in the polar region (east to Novaya Zemlya), and the lowpressure system gradually strengthens because of the intraseasonal relative vorticity advection at high levels. The intraseasonal relative vorticity advection guides the intraseasonal geopotential anomaly to move from the high latitude to the low latitude, and the low-pressure system at the surface also moves southward. There is no intraseasonal precipitation until the low-pressure system at the surface moves to the region near southern China, because there is little water vapour in northern China and ample water vapour in the south.After the occurrence of precipitation, the vorticity advection from the high latitude no longer affects the strength of the low-pressure system, but the intraseasonal diabatic heating accompanied by precipitation causes a second drop in pressure from −3 days to −1 day and makes the low-pressure system strongest here. In addition, the geopotential anomaly (10-30-day filtered) in low latitudes moves eastward along the southern foothills of the Tibetan plateau, which can guide the low-pressure system to move southward until it reaches southern China. K E Y W O R D S10-30-day oscillation, circulation in different latitudes, diabatic heating, relative vorticity advection, winter rainfall

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Section: Introductionmentioning

confidence: 99%

The 10–30‐day oscillation of winter rainfall in southern China and its relationship with circulation patterns in different latitudes

Yao

Tong

et al. 2019

Intl Journal of Climatology

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“…Long-term changes to precipitation characteristics that vary on a decadal scale are often related to changes in sea surface temperature (Wang et al, 2014;Ning and Bradley, 2015;Yan et al, 2019). For example, an increase in the daily variability of precipitation from the Indian monsoon was caused by a warming trend in the tropical Indian Ocean, which resulted in more heavy precipitation events and fewer moderate precipitation events (Goswami et al, 2006).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Changes in Slight and Extreme Precipitation Events From 1963 to 2017 Over Northern Xinjiang, China

Zhao

et al. 2021

Front. Earth Sci.

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Based on daily measured data from 25 stations in Xinjiang Province from 1963 to 2017, we discuss the statistical characteristics, linear trends, and temporal concentration of slight precipitation (SP) and extreme precipitation (EP) events, and consider relationships between SP and EP events and daily mean temperature. The results show that SP events contribute strongly to the total annual number of wet days, and that EP events contribute strongly to the total annual precipitation amount. In consist with the decrease in SP events and the increase in EP events over the 55-year period, the contribution of SP events to total annual number of wet days has decreased significantly while the contribution of EP events to total annual precipitation amount has increased significantly. SP event usually distributes through most months of the year, whereas EP event usually concentrates in summer (JJA). Influenced by the negative trends for SP events frequency and positive trends of EP events frequency during recent decades, the concentration degree for SP and EP events have significantly increased and decreased, respectively. Distinct differences are found between the relationships of SP events and EP events to daily mean temperature. The daily mean temperature recorded at the stations in Northern Xinjiang on days with SP events was between –35°C and +34°C, and for EP events ranged from –21°C to +30°C. Regionally averaged curves for the change in SP and EP event frequency with temperature have bimodal and unimodal distributions, respectively. Trends for daily mean temperatures and for the frequency of SP events at different temperatures agree well over nearly the entire temperature range, while trends for daily mean temperatures and for the frequency of EP events at different temperatures are not always consistent. These results will help to improve our understanding of the characteristics and variability of precipitation in arid regions within the context of climate warming.

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“…Referring to wet periods (Zolina et al, 2010) and long persistent rainfall definitions (Yan et al, 2019), a SPR event is defined as the precipitation event that persists a duration of 3-day or longer during the MAM with the daily precipitation exceeding 1 mmÁday −1 . The SIOD index is expressed by the difference between the area-averaged SSTs anomalies in the regions of 45-30 S, 45-75 E and 25-15 S, 80-100 E. The EOF analysis is performed to reveal spatiotemporal variation characteristics of the leading modes of the SPR precipitation amount over the YHRV.…”

Section: Methodsmentioning

confidence: 99%

Decreasing spring persistent rainfall over the Yangtze‐Huai River Valley of China during 1960–2019 and its possible causes

Tang

Wang

et al. 2021

Intl Journal of Climatology

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Based on the observations, reanalysis and sea surface temperature (SST) data sets, the spatio-temporal distribution characteristics of the decreasing spring persistent rainfall (SPR) over the Yangtze-Huai River Valley (YHRV) of China during 1960-2019 are revealed, and corresponding causes of the first leading two modes from the empirical orthogonal function (EOF) analysis on the SPR are also explored. Results indicate that the SPR decreases northwards and exhibits spatially consistent declining trends over the YHRV, with the maximum along the middle and lower reaches of the Yangtze River, attributing to the decrease in total spring rainfall over the YHRV. The first EOF mode of the SPR (EOF-1) over the YHRV shows a spatial mono-sign pattern, while the South Indian Ocean dipole plays an important role in modulating its variability. Among them, the warming SST in the southwestern Indian Ocean is more important for the spatially consistent decrease of the SPR over the YHRV. The second EOF mode of the SPR (EOF-2) over the YHRV exhibits a spatial distribution of north-south dipole pattern, while the North Atlantic Oscillation (NAO) contributes to the variation of EOF-2. The inter-decadal decreases of SPR at different rates are attributed to the transition between the first leading two EOF modes of SPR associated with the inter-decadal changes of the external forcing factors and atmospheric circulations. From mid-1970s to 1990s when the southern Indian Ocean SST increases rapidly, a mono-sign pattern of the SPR is observed with a rapid decrease SPR over the whole YHRV. Since the mid-1980s, when the NAO gradually reaches a predominantly positive phase, the SPR exhibits an increasing trend over the south of the YHRV, while a decreasing trend over the north part, causing the overall slowing of the precipitation decreasing trend.

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The decadal shift of the long persistent rainfall over the northern part of China and the associated ocean conditions

Cited by 8 publications

References 73 publications

The 10–30‐day oscillation of winter rainfall in southern China and its relationship with circulation patterns in different latitudes

The 10–30‐day oscillation of winter rainfall in southern China and its relationship with circulation patterns in different latitudes

Changes in Slight and Extreme Precipitation Events From 1963 to 2017 Over Northern Xinjiang, China

Decreasing spring persistent rainfall over the Yangtze‐Huai River Valley of China during 1960–2019 and its possible causes

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