On the Recent Change of the Indian Summer Monsoon-ENSO Relationship

Kawamura, Ryuichi; Uemura, Keiko; Suppiah, Ramasamy

doi:10.2151/sola.2005-052

Cited by 11 publications

(6 citation statements)

References 23 publications

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“…The correlation coefficient is − 0.16 in the Niño‐3 SST and almost zero in the MTG (Table I). The MTG, defined as the difference in area‐averaged upper tropospheric (200–500 hPa) thickness between the Tibetan Plateau (50°–100°E, 20°–40°N) and the Indian Ocean (50°–100°E, 0°–20°N) regions, has shown good correlation with ENSO and another large‐scale monsoon index proposed by Webster and Yang (1992) (Kawamura, 1998; Kawamura et al , 2005). The correlation coefficient between the MTG and Niño‐3 SST indices during the 20 years of our study is 0.68, which exceeds the 99% confidence level.…”

Section: Interannual Variability Over Bangladeshmentioning

confidence: 99%

Characteristic intraseasonal oscillation of rainfall and its effect on interannual variability over Bangladesh during boreal summer

Fujinami

Hatsuzuka

Yasunari

et al. 2011

Intl Journal of Climatology

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Intraseasonal oscillation (ISO) of rainfall during the summer monsoon season (June-August) and its plausible effect on interannual variation (IAV) of total summer monsoon rainfall over Bangladesh are examined using daily rainfall data from 25 rain-gauge stations for 20 years (1981)(1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000). Submonthly scale (7-25 days) ISO is a dominant mode of summer rainfall fluctuation over Bangladesh. In the active (suppressed) ISO phases, a cyclonic (anticyclonic) circulation anomaly develops at the low-level troposphere from northeastern India to Bangladesh, and an anticyclonic (cyclonic) circulation anomaly appears over the Bay of Bengal, accompanied by the enhancement of westerly/southwesterly (easterly/southeasterly) moisture flux anomalies over Bangladesh. The IAV of total summer monsoon rainfall is significantly correlated with that of the rainfall variance, mainly in the submonthly scale, suggesting that the ISO activity controls the IAV of the total summer monsoon rainfall. Moreover, the spatial patterns of atmospheric circulation and convection associated with the ISO and the IAV are quite similar to each other around the monsoon trough, especially from northeastern India to Bangladesh. In wet monsoon years, more frequent strong submonthly scale ISOs and a larger number of rainy days related to the active ISO phase are evident compared with that of dry monsoon years. Climatologically, Bangladesh is one of the most predominant areas of submonthly scale ISO; however, 30-60-day ISO is not prominent. These characteristic features probably allow the submonthly scale ISO to modulate the total seasonal rainfall and the spatial patterns of circulation and convection over and near Bangladesh.

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Section: Interannual Variability Over Bangladeshmentioning

confidence: 99%

Characteristic intraseasonal oscillation of rainfall and its effect on interannual variability over Bangladesh during boreal summer

Fujinami

Hatsuzuka

Yasunari

et al. 2011

Intl Journal of Climatology

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“…The impact of El Nino/Southern Oscillation (ENSO) on the SWMR has been explored intensively (Rasmusson and Carpenter, 1983;Krishna Kumar et al, 1999;Ailikun and Yasunari, 2001;Chang et al, 2001;Kawamura et al, 2005). The El Nino years are generally associated with below-normal SWMR rainfall (Rasmusson and Carpenter, 1983;Yasunari, 1990) and above-normal NEMR rainfall (Suppiah, 1996(Suppiah, , 1997.…”

Section: Introductionmentioning

confidence: 99%

Interannual variability of atmospheric water balance over South Peninsular India and Sri Lanka during northeast monsoon season

Venkatraman

Yasunari

2008

Intl Journal of Climatology

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ABSTRACT:In this study we have investigated atmospheric water balance over South Peninsular India and Sri Lanka during the months October to December (OND) using computed moisture convergence (C) and residual evaporation (E) from National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data and Global Precipitation and Climatology Project (GPCP) precipitation data. The interannual signatures of OND precipitation, moisture convergence and evaporation over the South Peninsular India and Sri Lanka have been captured. The spatial and temporal characteristics of the hydrological cycle and the contribution of evaporation (E) and convergence (C) to precipitation (P ) are discussed in detail. Over the South Peninsular India and Sri Lanka, evaporation (E) dominates during the entire monsoon months (OND). However, the interannual variability of precipitation over the domain is not necessarily influenced by the same criteria which influences the mean seasonal precipitation. The moisture from the Indian Ocean (IO) sector also modulates the precipitation over this region on a year-to-year basis. It has been noted that the positive northeast monsoon rainfall (NEMR) is associated with El Nino coupled with IO dipole, but negative NEMR is weakly associated only with La Nina over South Peninsular India and Sri Lanka. There also exists a significant landatmospheric interaction over the region in modulating the hydrological cycle on a year-to-year basis.

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“…However, the relationship between submonsoon and ENSO is complex. For example, the relationship between ISM precipitation and ENSO is sensitive to the selection of ISM domain and has shown significant interdecadal variation (Kawamura et al., 2005; Roy, 2017). Hence, the response to ENSO in each submonsoon region such as EASM‐ENSO and ISM‐ENSO and the underlying mechanisms are not discussed in this work, and will be further detailed in future studies.…”

Section: Future Changes In the Aam Systemmentioning

confidence: 99%

Future Changes in the Asian‐Australian Monsoon System With 1.5°C and 2°C Rise in Temperature

Wang

Zhu

et al. 2021

JGR Atmospheres

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The Asian-Australian monsoon (AAM) system, including three Asian submonsoons (namely East Asian monsoon, Indian monsoon, and western North Pacific monsoon) and one southern hemisphere (SH) monsoon (Indonesian-Australian monsoon), covers approximately one-third of the global tropics and subtropics (Wang et al., 2008). The climatology and multiscale variability of the entire AAM and its submonsoons, as well as the relationship with El Niño-Southern Oscillation (ENSO), has been widely studied (Chen et al., 2004; Lee et al., 2013; Wang et al., 2003; Webster & Yang, 1992). The AAM system can not only directly affect the local temperature, precipitation and extreme events, which are closely related to social production and human activities, but also indirectly affect the global climate through circumglobal teleconnection patterns such as the "

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On the Recent Change of the Indian Summer Monsoon-ENSO Relationship

Cited by 11 publications

References 23 publications

Characteristic intraseasonal oscillation of rainfall and its effect on interannual variability over Bangladesh during boreal summer

Characteristic intraseasonal oscillation of rainfall and its effect on interannual variability over Bangladesh during boreal summer

Interannual variability of atmospheric water balance over South Peninsular India and Sri Lanka during northeast monsoon season

Future Changes in the Asian‐Australian Monsoon System With 1.5°C and 2°C Rise in Temperature

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