A counterexample of aerosol suppressing light rain in Southwest China during 1951–2011

Wu, Jian; Ling, Caiyun; Zhao, Deming; Zhao, Bin

doi:10.1002/asl.682

Cited by 9 publications

(7 citation statements)

References 21 publications

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“…Thus, this issue should be further studied in the context of climate change, since significant light rain reduction has been observed in many regions, including non‐polluted and polluted regions (Qian et al ., ; Huang and Wen, ). In recent, we have found an example of long‐term light rainfall reduction in a very clean region in Southwest China, which also be interpreted by the change of RH (Wu et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Impacts of cloud cover on long‐term changes in light rain in Eastern China

Li-ya

Gao³

et al. 2017

Intl Journal of Climatology

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Daily sunshine duration data from 384 stations in Eastern China was used to separate light rain in the warm season during the period 1979–2009 into light rain occurred in overcast and partly cloudy weather. Light rain reduction over past 30 years mainly happened in partly cloudy weather, which accounted for 84% of the decrease of total light rain days and amount in the warm seasons over Eastern China during the period 1979–2009. The primary cause of the significant reduction of light rain in partly cloudy weather was the relative humidity decrease in the low troposphere, which was induced by both the air temperature increase and water vapour content (WVC) decrease, while warming played a much more important role compared with the WVC in the change of light rain in most regions of Eastern China.

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Section: Discussionmentioning

confidence: 99%

Impacts of cloud cover on long‐term changes in light rain in Eastern China

Li-ya

Gao³

et al. 2017

Intl Journal of Climatology

Self Cite

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“…Light precipitation is considered an important factor influencing drought control, can directly affect soil moisture content and water conservation, and help to reduce the frequency of drought, especially in arid and semi-arid areas [15]. Jiang et al investigated changes in rainfall intensity from different parts of China and found that light precipitation events have been decreasing across the country in the context of continued warming of the global climate [16].…”

Section: Introductionmentioning

confidence: 99%

“…Jiang et al investigated changes in rainfall intensity from different parts of China and found that light precipitation events have been decreasing across the country in the context of continued warming of the global climate [16]. The proportion of light precipitation to total precipitation and light precipitation days to total precipitation days increased from southeast to northwest China, and light precipitation days accounted for more than 60% of the total precipitation days [12,15,17]. Additionally, a reduction in the number of light precipitation days was observed in most regions of China [12,18,19], and a lower intensity of light rain was associated with a much more significant reduction in the amount and number of light rain days [14].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variations in Light Precipitation Events in the Yellow River Basin, China, and Relationships with Large-Scale Atmospheric Circulation Patterns

Zhang

Peng

et al. 2022

Sustainability

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Light precipitation events are an essential feature of rainfall for agricultural production, risk prediction of drought or flood disasters, and natural resource management in a certain area. We investigated the spatiotemporal variations in light precipitation events with intensities of 0.1–10 mm/day, based on daily precipitation data for the Yellow River Basin (YRB), China, during 1960–2018, and explored their relationships with large-scale atmospheric circulation patterns (LSACPs) and altitude. For further analysis of the changes in the light precipitation events, we classified light rain (0.1 ≤ P < 10.0 mm/day) into five grades of intensity by using equal interval division. Results indicate that the mean annual light precipitation amount and days were 182.7 mm and 80 days, respectively, from 1960 to 2018 over the YRB, accounting for 39.2% and 85.2% of the total annual precipitation amount and days, respectively. Both the amount of light rain and the number of light precipitation days declined by −1.3 mm/decade and −1.4 days/decade, respectively, and suggested that most rain events were of low intensity (0.1 ≤ P < 2.0 mm/day). Light precipitation events mainly occurred in the upper and middle reaches of the YRB and decreased from the southwest to the north. Additionally, changes in light rain events appear to be complex and possibly related to LSACPs and altitude. We found that the LSACPs were a possible mechanism for light precipitation events in the YRB over the past decades. With increasing elevation, light precipitation events decreased significantly throughout the study period. Thus, the decrease in precipitation days mainly occurred at lower altitudes in the YRB. The results also reflect the complexity of regional climate change in the YRB because atmospheric circulation related to climate phenomena not only causes the complex variation in precipitation but also changes its altitude dependence.

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“…In China, a decrease of light-rain days has been observed in many regions as well as in the country as a whole (Huang and Wen, 2013;Li and Su, 2014;Ren et al 2015;Zhou et al, 2020). Change in temperature, aerosol concentrations, cloud, and relative humidity are examined to explain the possible reasons for light precipitation decrease, but no consensus has been reached (Huang and Wen, 2013;Wu et al, 2016. Wen, et al, 2016, though Ren et al (2016) attributed the reduction to a combined in uence of urbanization, aerosols and measurement error.…”

Section: Introductionmentioning

confidence: 99%

Urbanization Significantly Reduces Frequency of Light Rain: an Example From Beijing City

Yang

Ren

Yan

et al. 2021

Preprint

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An hour precipitation dataset of 42 automatic weather stations is developed and applied to analyze the temporal and spatial characteristics of light precipitation in urban areas of Beijing City during 2007-2017. The stations are classified into three groups, including 18 sites in central urban area (4th RR), 10 sites in peri-urban area (4th-5th RR) and 14 sites in suburban area (5th-6th RR). Light precipitation is defined as hourly rainfall of 0.1-0.3mm. Analysis shows that light precipitation occurred in urban area in the whole day, with the peak value in 0600 LST and minimum value in 1600LST; monthly variation of light precipitation frequency (LPF) was characterized by the highest value in summer and the lowest value in winter; remarkable differences are found for the various urbanized areas, with the annual and seasonal mean LPF being generally small in central urban area and gradually increasing toward suburban area; the hourly mean LPF during morning and nighttime is higher in summer than those in other seasons in each of the urban areas; relative humidity, aerosol and wind speed might have been the major influential factors for the observed temporal and spatial pattern of light precipitation.

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A counterexample of aerosol suppressing light rain in Southwest China during 1951–2011

Cited by 9 publications

References 21 publications

Impacts of cloud cover on long‐term changes in light rain in Eastern China

Impacts of cloud cover on long‐term changes in light rain in Eastern China

Spatiotemporal Variations in Light Precipitation Events in the Yellow River Basin, China, and Relationships with Large-Scale Atmospheric Circulation Patterns

Urbanization Significantly Reduces Frequency of Light Rain: an Example From Beijing City

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