The impact of varying seasonal lengths of the rainy seasons of India on its teleconnections with tropical sea surface temperatures

Misra, Vasubandhu; Bhardwaj, Amit

doi:10.1002/asl.959

Cited by 4 publications

(4 citation statements)

References 36 publications

(51 reference statements)

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“…We understand that during the process of the northward movement of the southwestern monsoon, onset in different sub-regions (SRs) (Figure 1) is influenced by ENSO and Indian Ocean Dipole (IOD)-like phenomena [9][10][11][12][13]. Monsoon Intra-Seasonal Oscillation (MISO) is one important player in the intra-seasonal variability in monsoon rainfall, and considering the context of the present study, it has a strong relationship with the onset of monsoons [14].…”

Section: Introductionmentioning

confidence: 67%

“…Hence, the inclusion of independent flood and drought years (considering the years with the absence of any of the modes of climate variations) in the present study is to understand the spatio-temporal onset characteristics of the Indian summer monsoon under different conditions. We understand that during the process of the northward movement of the southwestern monsoon, onset in different sub-regions (SRs) (Figure 1) is influenced by ENSO and Indian Ocean Dipole (IOD)-like phenomena [9][10][11][12][13]. Monsoon Intra-Seasonal Oscillation (MISO) is one important player in the intra-seasonal variability in monsoon rainfall, and considering the context of the present study, it has a strong relationship with the onset of monsoons [14].…”

Section: Introductionmentioning

confidence: 67%

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The Spatio-Temporal Onset Characteristics of Indian Summer Monsoon Rainfall and Their Relationship with Climate Indices

et al. 2022

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Regional variations of monsoon onset dates across India were analyzed for 67 years (1951–2017) under different modes of climate variations, i.e., El Niño, La Niña, and the Indian Ocean Dipole (IOD), along with flood and drought years using the objective method and statistical techniques. Monsoon onset analysis revealed that the northern, northeastern, and southern parts were highly susceptible to the early onset of La Niña, and the northern and northern northwest parts were highly susceptible to the early onset of El Niño. The onset dates were early (late) in the sub-regions of the central, southern, and northeastern (northern, northwestern, and western) parts of India during flood (drought) years. Further, onset dates in flood years occurred earlier than those in La Niña years, and onset dates in drought years were later than those in El Niño years. The onset occurrence probability and influence of the synoptic events are discussed. This research could help in understanding the onset of monsoon and its predictability for societal applications.

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Section: Introductionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 67%

The Spatio-Temporal Onset Characteristics of Indian Summer Monsoon Rainfall and Their Relationship with Climate Indices

et al. 2022

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“…Three month running means of sea surface temperature (SST) anomalies over Nino 3.4 region that is, Oceanic Nino Index (ONI) is an important index for ENSO. El Niño events having warmest SST anomalies over the central equatorial Pacific region increase the likelihood of a drier pre‐monsoon and a drought inducing subsidence over India (Kumar et al., 2006 ; Misra & Bhardwaj, 2020 ). Moreover, simultaneous multiple atmospheric extremes events for example, El Niño, drought and heat waves often result in severe compounding impacts and greatly increase the risk of forest fires (Jain, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Investigation of Forest Fire Activity Changes Over the Central India Domain Using Satellite Observations During 2001–2020

et al. 2021

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Forest fire is an increasingly common phenomenon that affects almost all forest types and biomes on earth, largely causing global to regional changes in the air quality, radiation budget, land-atmosphere interactions, nutrient cycles, and ecological balance (Bowman et al., 2011;Cochrane, 2009;Giglio et al., 2016). Recurrent fires also pose considerable threat to nearby residents who often suffer from cardiovascular and respiratory diseases such as asthma, chronic bronchitis, and emphysema. In cases of massive forest fires, people are forced to evacuate or permanently relocate their homes. High fatalities of residents, firefighters, and fauna, severe air pollution ranging from few to thousands of kilometers, and huge economy losses from property damages, national park closures,

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“…The transitional periods between wet and dry seasons are vital to vegetation productivity [2][3][4], forest involvement [5][6][7], and disaster adaptation [8][9][10]. Therefore, concerns over changes in seasonal transitions [11,12] are crucial in addressing regional climate, ecology, and hydrology problems [1,13].…”

Section: Introductionmentioning

confidence: 99%

Regime shifts of the wet and dry seasons in the tropics under global warming

Guo

Guan

2022

Environ. Res. Lett.

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The main seasonal characteristics in the tropics include both spatial patterns and temporal parameters of onset, cessation, duration, and the number of wet and dry seasons. Previous studies showed that wet seasons shortened and dry seasons extended with global warming, but the changes in spatial distribution and the number of wet and dry seasons are still unclear. Here, we analyze the climatic characteristics of once wet and dry season a year (annual regime) and twice wet and dry seasons a year (biannual regime), and find that regimes of wet and dry seasons have changed from 1935 to 2014. Across the equator and the Tropic of Cancer and Capricorn, some regions where there used to be an annual regime have become a biannual regime; instead, other regions have shifted from a biannual regime into an annual regime. With seasonal regimes shifting, areas of the biannual regime have expanded at a rate of 31000 km2/decade. Meanwhile, in annual regime regions, wet seasons have been shortened in 60.3% of regions, with an average of 7 days; the onset dates of wet seasons have been delayed in 64.8%, with an average of 6 days. Besides, wet seasons have become wetter in 51.1% of regions, and dry seasons have become drier in 59.9%. In biannual regime regions, the shortened wet seasons have occurred in 83.7% of regions, with an average shortening of 8 days, and precipitation has decreased in both wet and dry seasons. Moreover, the shorter wet seasons will amplify further by the end of the 21st century. The continuous seasonal changes will threaten agricultural, ecological security, and even human well-being.

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The impact of varying seasonal lengths of the rainy seasons of India on its teleconnections with tropical sea surface temperatures

Cited by 4 publications

References 36 publications

The Spatio-Temporal Onset Characteristics of Indian Summer Monsoon Rainfall and Their Relationship with Climate Indices

The Spatio-Temporal Onset Characteristics of Indian Summer Monsoon Rainfall and Their Relationship with Climate Indices

Investigation of Forest Fire Activity Changes Over the Central India Domain Using Satellite Observations During 2001–2020

Regime shifts of the wet and dry seasons in the tropics under global warming

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