Influence of aerosol-cloud interaction on austral summer precipitation over Southern Africa during ENSO events

Ruchith, R. D.; Sivakumar, Venkataraman

doi:10.1016/j.atmosres.2017.11.011

Cited by 5 publications

(5 citation statements)

References 44 publications

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“…Precipitation exhibits a clear and distinct pattern during different phases of ENSO. Dynamical parameters, specific humidity and horizontal wind also exhibit clear differences for both ENSO phases [81].…”

Section: Discussionmentioning

confidence: 96%

“…An in-phase relationship between rainfall and Niño 3.4 is found too at the band period of 128-256 months from 1970 to 2005. Since ENSO events can have substantial influence on African rainfall [80], the equatorial region exhibits more rainfall during El-Niño years than La-Nina years [81]. In the Indian Ocean basin, Narasimha and Bhattacharyya [82] suggested that the stronger coherence between Homogeneous Indian Monsoon and Niño 3.4 is found in the 2-7-year band and that both rainfall and the Niño 3.4 index appear irregular and random.…”

Section: Wavelet Analysismentioning

confidence: 99%

“…region exhibits more rainfall during El-Niño years than La-Nina years [81]. In the Indian Ocean basin, Narasimha and Bhattacharyya [82] suggested that the stronger coherence between Homogeneous Indian Monsoon and Niño 3.4 is found in the 2-7-year band and that both rainfall and the Niño 3.4 index appear irregular and random.…”

Section: Wavelet Analysismentioning

confidence: 99%

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Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016

Loua

Benchérif

Mbatha

et al. 2019

Climate

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The monthly averaged data time series of temperatures and rainfall without interruption of Conakry Airport (9.34° N 13.37° W, Guinea) from 1960 to 2016 were used. Inter-annual and annual changes in temperature and rainfall were investigated. Then, different models: Mann-Kendall Test, Multi-Linear-Regression analysis, Theil-Sen’s slope estimates and wavelet analysis where used for trend analysis and the dependency with these climate forcings. Results showed an increase in temperature with semi-annual and annual cycles. A sharp and abrupt rise in the temperature in 1998 was found. The results of study have shown increasing trends for temperature (about 0.21°/year). A decrease in rainfall (about −8.14 mm/year) is found since the end of 1960s and annual cycle with a maximum value of about 1118.3 mm recorded in August in average. The coherence between the two parameters and climate indices: El Niño 3.4, Atlantic Meridional Mode, Tropical Northern Atlantic and Atlantic Niño, were investigated. Thus, there is a clear need for increased and integrated research efforts in climate parameters variations to improve knowledge in climate change.

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Section: Discussionmentioning

confidence: 96%

Section: Wavelet Analysismentioning

confidence: 99%

See 1 more Smart Citation

Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016

Loua

Benchérif

Mbatha

et al. 2019

Climate

View full text Add to dashboard Cite

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“…The so-called curriculum evaluation is the process of judging the value or characteristics of related issues such as the plan, activities, and results of curriculum and teaching by certain methods and ways. Reference [22] research shows that the establishment of this teaching mode has realized the transformation of postgraduate English learning from teacher-centered to teacher-led and studentcentered dual-subject teaching mode, from passive and cramming learning to creative learning with autonomy, interaction, cooperation and inquiry and from students' busy exam-oriented education in the past to qualityoriented education to improve postgraduates' comprehensive practical English application ability. According to reference [22], teachers should modify the previous curriculum 2…”

Section: Related Workmentioning

confidence: 99%

Construction of Public English Curriculum System Based on Cloud Interactive Teaching Mode and Cloud Computing

Zhou

2022

Wireless Communications and Mobile Computing

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English teaching can be divided into two complementary ways: classroom teaching and neural network autonomous learning, namely, physical English teaching and virtual English teaching. On the cloud interaction and cloud computing platform, teachers upload teaching resources, and students can view learning resources, submit assignments, and interact through mobile terminals such as mobile phones, notebooks, and iPads, so as to achieve all-round teacher-student interaction that breaks through time and space constraints and create a “live” classroom for ubiquitous English learning. This paper constructs a public English curriculum system based on the “cloud interaction” teaching mode. This model fully combines the actual English level of students and adopts practical teaching methods in both classroom introduction and classroom teaching. The model lets students easily integrate into regular learning activities, interpret language on the examples and life fragments around students, and accept language naturally and improves the effect of language teaching.

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“…Compared to the studies regarding aerosol effects on weather and climate, the impacts of weather and climate on aerosols are relatively less studied. From the climatological view, aerosols can be influenced by the global warming and large-scale circulation variations, such as the Arctic warming [14], the El Niño event [15], and so on. From the weather view, aerosols can be influenced by various meteorological factors [16].…”

Section: Introductionmentioning

confidence: 99%

Impact of Precipitation with Different Intensity on PM2.5 over Typical Regions of China

et al. 2020

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Atmospheric aerosol pollution has significant impacts on human health and economic society. One of the most efficient way to remove the pollutants from the atmosphere is wet deposition. This study selected three typical atmospheric pollution regions in China, the Beijing-Tianjin-Hebei (BTH), the Yangtze River Delta (YRD) and the Pearl River Delta (PRD) regions, as research areas, and used the hourly precipitation and PM2.5 mass concentration data from 2015 to 2017 to investigate the removal impacts of precipitation on PM2.5. The PM2.5 mass concentration difference before and after the hourly precipitation events was used to denote as the impacts of precipitation. Hourly precipitation event was selected so that the time difference between two PM2.5 observations was short enough to limit the PM2.5 change caused by other factors. This study focused on the differences in the removal effect of precipitation on PM2.5 under different precipitation intensities and pollution levels. The results show that both precipitation intensity and aerosol amount affected the removal effect. A negative removal effect existed for both light precipitation and low PM2.5 mass concentration conditions. In contrast, a positive removal effect occurred for both high precipitation and high PM2.5 mass concentration conditions. The removal effect increased with increasing precipitation intensity and PM2.5 mass concentration before precipitation and was consistent with the change trend of wind speed at a height of 100 m. The findings of this study can help understand the mechanism of wet scavenging on air pollution, providing support for air pollution control in future.

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Influence of aerosol-cloud interaction on austral summer precipitation over Southern Africa during ENSO events

Cited by 5 publications

References 44 publications

Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016

Study on Temporal Variations of Surface Temperature and Rainfall at Conakry Airport, Guinea: 1960–2016

Construction of Public English Curriculum System Based on Cloud Interactive Teaching Mode and Cloud Computing

Impact of Precipitation with Different Intensity on PM2.5 over Typical Regions of China

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