South Asian perspective on temperature and rainfall extremes: A review

Naveendrakumar, G.; Vithanage, Meththika; Kwon, Hyun‐Han; Chandrasekara, S. S. K.; Iqbal, M. C. M.; Pathmarajah, S.; Fernando, W. C. D. K.; Obeysekera, Jayantha

doi:10.1016/j.atmosres.2019.03.021

Cited by 74 publications

(26 citation statements)

References 105 publications

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“…Climate change has caused an increase in extreme rainfall and snowfall in many parts of the world (Donat et al 2016). Over the last few decades, extreme weather events have become more significant in countries in South Asia, such as Afghanistan, Bangladesh, Bhutan, India, and Sri Lanka (Naveendrakumar et al 2019). In Europe, anomalies of extreme rainfall are also considered to have a strong connection with climate change (Tabari and Willems 2018).…”

Section: Changes In Precipitation Conditionsmentioning

confidence: 99%

Effect of climate change induced extreme precipitation on landslide activity in the Three Gorges Reservoir, China

Zhu

Song

et al. 2020

Bull Eng Geol Environ

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Climate change has caused an increase in extreme rainfall and snowfall in many parts of the world. For example, in the Three Gorges Reservoir area, annual precipitation has gradually increased and the occurrence of heavy precipitation events has become more frequent. As the reservoir water level rises in October, the high water combined with heavy precipitation creates a "special hydrological environment," which recently caused the Yanguan landslide. The Yanguan landslide is a large-scale soil landslide that has undergone two slides, pushed the Yanguan Road Bridge into the reservoir, and caused serious damage to roads and buildings. In the present study, the combined effects of high water and heavy precipitation on landslide deformation characteristics (movement patterns and evolution processes) have been analyzed and a stability evaluation was conducted through a field investigation and numerical simulation. To comparatively analyze these combined effects of high water and heavy precipitation, a two-dimensional finite element model was created, and four cases of the hydrological environment were calculated with the model. Results show that the factor of safety was maintained in the range of 1.013 to 1.059 before the precipitation conditions changed. However, as heavy precipitation increased in October 2017 (reaching 356.4 mm in 1 month), this "special hydrological environment" potentially decreased the FoS to 0.948, which is 9.6% lower than that observed under normal conditions, and helped drive the Yanguan landslide activity. The analysis of these various combined effects can also indicate the impacts of climate change on landslides in other areas of the Three Gorges Reservoir.

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Section: Changes In Precipitation Conditionsmentioning

confidence: 99%

Effect of climate change induced extreme precipitation on landslide activity in the Three Gorges Reservoir, China

Zhu

Song

et al. 2020

Bull Eng Geol Environ

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“…Numerous studies have reported that precipitation extremes appear to intensify with global warming [6][7][8][9]. Precipitation extremes are directly responsible for floods, droughts, landslides, and soil erosion, which have notable impacts on both the environment and society [10,11].…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution and Temporal Trends in the Daily Precipitation Concentration across the Yarlung Tsangpo River Basin: Eastern Himalaya of China

Zhu

Li²,

Liu

et al. 2020

Advances in Meteorology

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Understanding the temporal inequality in precipitation is of great importance for water resource management, environmental risk management, and ecological conservation. This study investigated the spatial patterns and trends of the daily precipitation concentration over the Yarlung Tsangpo River Basin using the concentration index (CI) and the Lorentz asymmetric coefficient (LAC). A Mann–Kendall test and Hurst’s rescaled range analysis were used to detect the change in CI trends. The CI ranged from 0.58 to 0.65, suggesting that a quarter of the rainiest days contributed approximately 69–78% of the total precipitation. The LAC analysis indicated that the nonuniform distribution of precipitation was mainly attributed to a large proportion of days with light rainfall. Compared with that of the central region, the daily precipitation in the western and eastern regions was more irregular. At a seasonal scale, the dry season had a less homogeneous spatial distribution of CI compared to that of the wet season. Most areas exhibited no significant trends in CI from 1970 to 2017. A quarter of the stations presented a significant downward trend in CI, which were primarily found in the central and northern regions. In addition, the future trends of CI in most areas mostly agree with those of the current state; however, the majority of stations exhibited an uneven precipitation distribution in the dry season.

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“…Temperature and precipitation extremes have been studied both on global [3,6,11,12] and on regional scales [13][14][15][16][17]. Previous studies have found widespread significant changes in temperature extremes associated with warming, however, spatial patterns of changes in extreme precipitation trends appear mixed on regional scales [3,9].…”

Section: Introductionmentioning

confidence: 99%

Observed Changes in Temperature and Precipitation Extremes Over the Yarlung Tsangpo River Basin during 1970–2017

Liu

et al. 2019

Atmosphere

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Twenty-five climate indices based on daily maximum and minimum temperature and precipitation at 15 meteorological stations were examined to investigate changes in temperature and precipitation extremes over the Yarlung Tsangpo River Basin (1970–2017). The trend-free prewhitening (TFPW) Mann–Kendall test and Pettitt’s test were used to identify trends and abrupt changes in the time series, respectively. The results showed widespread significant changes in extreme temperature indices associated with warming, most of which experienced abrupt changes in the 1990s. Increases in daily minimum and maximum temperature were detected, and the magnitude of daily minimum temperature change was greater than that of the daily maximum temperature, revealing an obvious decrease in the diurnal temperature range. Warm days and nights became more frequent, whereas fewer cold days and nights occurred. The frequency of frost and icing days decreased, while summer days and growing season length increased. Moreover, cold spell length shortened, whereas warm spell length increased. Additionally, changes in the precipitation extreme indices exhibited much less spatial coherence than the temperature indices. Spatially, mixed patterns of stations with positive and negative trends were found, and few trends in the precipitation extreme indices at individual stations were statistically significant. Generally, precipitation extreme indices showed a tendency toward wetter conditions, and the contribution of extreme precipitation to total precipitation has increased. However, no significant regional trends and abrupt changes were detected in total precipitation or in the frequency and duration of precipitation extremes.

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South Asian perspective on temperature and rainfall extremes: A review

Cited by 74 publications

References 105 publications

Effect of climate change induced extreme precipitation on landslide activity in the Three Gorges Reservoir, China

Effect of climate change induced extreme precipitation on landslide activity in the Three Gorges Reservoir, China

Spatial Distribution and Temporal Trends in the Daily Precipitation Concentration across the Yarlung Tsangpo River Basin: Eastern Himalaya of China

Observed Changes in Temperature and Precipitation Extremes Over the Yarlung Tsangpo River Basin during 1970–2017

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