A review on the Indian summer monsoon rainfall, variability and its association with ENSO and IOD

Hrudya, P. H.; Varikoden, Hamza; Vishnu, R.

doi:10.1007/s00703-020-00734-5

Cited by 126 publications

(78 citation statements)

References 120 publications

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“…The IOD phenomenon has been considered as an important mode of climate variability in the tropics (Behera et al ., 2006) and it is also an important modulator of the variability of ISMR (Ashok et al ., 2004). A positive (negative) IOD event is characterized by enhanced (suppressed) rainfall in the Indian region (Ashok et al ., 2001; Hrudya et al ., 2020). It can also modulate the number of rain events in central India by forming a convergence zone over the region through the anomalous moisture transport from the southeastern equatorial Indian Ocean to the Bay of Bengal (Ajayamohan and Rao, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the Indian region, the IOD produces impact on several other tropical regions such as Europe, North and South America, South Africa, and so on (Saji and Yamagata, 2003; Preethi et al ., 2015). After the discovery of IOD, several studies were carried out to understand its characteristics and impact on ISMR (Ashok et al ., 2001, 2004; Vinayachandran et al ., 2002; Yamagata et al ., 2004; Behera et al ., 2006; Ashok and Saji, 2007; Francis et al ., 2007; Luo et al ., 2010; Du et al ., 2013; Doi et al ., 2017; Behera and Ratnam, 2018; Lu et al ., 2018; Hrudya et al ., 2020). It was well established that the frequency and strength of positive IOD has increased in recent decades (Abram et al ., 2008), and also the IOD‐ISMR relationship has strengthened (Ashok et al ., 2001, 2004; Ummenhofer et al ., 2011; Krishnaswami et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

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Changes in the relationship between Indian Ocean dipole and Indian summer monsoon rainfall in early and recent multidecadal epochs during different phases of monsoon

Hrudya

Varikoden

Vishnu

2020

Intl Journal of Climatology

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changes in the relationship between Indian Ocean dipole and Indian summer monsoon rainfall in early and recent multidecadal epochs during different phases of monsoon

Hrudya

Varikoden

Vishnu

2020

Intl Journal of Climatology

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“…During La Niña/El Niño events, the southeast to southwest Pacific Ocean temperature difference increases/decreases, which generally strengthens/weakens the Walker circulation and the trade winds. With the higher/lower ocean temperatures, Southeast Asia (partially including the LMRB) experiences more/less evaporation and clouds, and consequently more/less precipitation (e.g., Cherchi & Navarra, 2013; Hrudya et al, 2020; Juneng & Tangang, 2005; Räsänen et al, 2016; Räsänen & Kummu, 2013). During La Niña/El Niño events, the temperatures over the Arabian Sea, Indian Ocean, and the Bay of Bengal also remain cooler/warmer than normal.…”

Section: Discussionmentioning

confidence: 99%

Influential Climate Teleconnections for Spatiotemporal Precipitation Variability in the Lancang‐Mekong River Basin From 1952 to 2015

2020

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The Lancang-Mekong River Basin (LMRB) in Mainland Southeast Asia is home to~70 million people, mostly living in poverty and typically working in primary freshwater-related sectors, particularly agriculture and fishery. Understanding the mechanisms of the historical variability in precipitation (as the crucial water source) plays a key role in regional sustainable development throughout the LMRB. Herein, the spatiotemporal variability in interannual and intra-annual precipitation over the LMRB was analyzed using the Global Precipitation Climatology Centre (GPCC) data for the period 1952-2015. The empirical orthogonal function (EOF) and wavelet transform coherence methods were utilized to investigate the relationships of such historical variations in annual (water year: November-October), dry season (November-May), and wet season (June-October) precipitation with 13 different climate teleconnections (eight large-scale oceanic-atmospheric circulation patterns and five summer monsoons). On the basin scale, only a significant (p < 0.05) wetting trend in the dry season precipitation (DSP) was uncovered. Spatially, significant wetting (drying) trends in annual precipitation detected over the northeastern (most western) parts of the Mekong River Basin during the water years 1952-2015, largely contributed by the substantial increases (decreases) in historical wet season precipitation. The most important precipitation pattern (EOF1) was identified as a strong (relatively weak) positive center in the eastern (southwestern) Mekong River Basin accompanying by a significantly high (relatively low) positive value for the first EOF mode of the dry season precipitation (wet season precipitation). Precipitation variability in the LMRB was significantly associated with the South Asian Summer Monsoon Index, Southern Oscillation Index, and Indian Summer Monsoon Index. Precipitation is the most basic link between atmospheric (e.g., evaporation and cloud) and land-surface (e.g., soil moisture and infiltration) hydrological processes in the water cycle mechanism (e.g., Andersson et al., 2005). It is also considered to be one of the key hydrometeorological variables for detecting regional climatic changes around the world (e.g.,

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“…While fluctuations in the ENSO are relatively influential in the context of global climate fluctuations, the IOD is known to account for approximately 12% of Indian Ocean sea surface temperature fluctuations, which mainly affect countries adjacent to the Indian Ocean [ 20 , 21 ]. Variation in the ENSO and IOD can cause severe flooding and droughts around the world through atmospheric remote connections [ 7 , 22 ]. In particular, South and Southeast Asian regions, which are located in areas impacted by fluctuations in both the ENSO and IOD, are greatly affected by the climate.…”

Section: Discussionmentioning

confidence: 99%

Effects of El Niño/La Niña on the Number of Imported Shigellosis Cases in the Republic of Korea, 2004–2017

Kim

Sung

Kwon

et al. 2020

IJERPH

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Shigellosis is a major diarrheal disease in low- and middle-income countries. Although the incidence of such diseases in South and Southeast Asia has been associated with climate fluctuations linked to the El Niño–Southern Oscillation (ENSO), the impact of ENSO on shigellosis infections remains unknown. Data reported to being infected with shigellosis while traveling abroad from 2004 to 2017 were obtained from the Korea Centers for Disease Control and Prevention. We investigated the relationship between the Oceanic Niño Index (ONI) and Indian Ocean Dipole Mode Index and the relative risk of shigellosis in outbound travelers using distributed lag linear and non-linear models. From 2004 to 2017, 87.1% of imported shigellosis was infected in South and Southeast Asian countries. The relative risk of imported shigellosis infection in outbound travelers increased as the ONI decreased. In the association with the five-month cumulative ONI, the relative risk of infection continuously increased as the La Niña index gained strength. Climate fluctuations associated with the La Niña phenomenon in South and Southeast Asian countries can lead to issues in sanitation and water safety. Our findings suggest that the decreasing trend in the ONI is associated with an increased incidence of shigellosis in these countries.

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A review on the Indian summer monsoon rainfall, variability and its association with ENSO and IOD

Cited by 126 publications

References 120 publications

Changes in the relationship between Indian Ocean dipole and Indian summer monsoon rainfall in early and recent multidecadal epochs during different phases of monsoon

Changes in the relationship between Indian Ocean dipole and Indian summer monsoon rainfall in early and recent multidecadal epochs during different phases of monsoon

Influential Climate Teleconnections for Spatiotemporal Precipitation Variability in the Lancang‐Mekong River Basin From 1952 to 2015

Effects of El Niño/La Niña on the Number of Imported Shigellosis Cases in the Republic of Korea, 2004–2017

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