Solar influence on the Indian summer monsoon during the Holocene

Gupta, Anil K.; Das, Moumita; Anderson, David M.

doi:10.1029/2005gl022685

Cited by 349 publications

(224 citation statements)

References 36 publications

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“…These results are consistent with other Holocene records in and around the Arabian Sea (Fleitmann et al 2003;Gupta et al 2005) and Andaman Sea (Rashid et al 2007).…”

supporting

confidence: 82%

Late Glacial to Holocene Indian Summer Monsoon Variability Based upon Sediment Records Taken from the Bay of Bengal

Rashid¹,

England²,

Thompson³

et al. 2011

Terr. Atmos. Ocean. Sci.

148

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Paleoclimatic records from the Bay of Bengal are rare. We reconstruct the sea-surface temperature (SST) 18 O sw values suggest that the monsoon was stronger and wetter resulting in a humid climate. After ~5 ka the Indian summer monsoon weakened significantly, indicating less dilution of the sea surface by the Ganges-Brahmaputra-Meghna outflow and/or less direct rainfall. We hypothesize that the prevailing late Holocene dry climate may have caused the diminishment and subsequent abandonment of the settlements of the great Indus Valley Civilizations. Our Bay of Bengal climate records are consistent with those from the Andaman Sea, corroborating broad regional changes in the Indian summer monsoon during the last 25 ka. The general pattern and timing of monsoon variability in the Bay of Bengal and Andaman Sea seems to parallel the Arabian Sea, Africa, and Asian ice cores and speleothem records suggesting that a common tropical forcing may have induced these abrupt climate changes.

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“…These results are consistent with other Holocene records in and around the Arabian Sea (Fleitmann et al 2003;Gupta et al 2005) and Andaman Sea (Rashid et al 2007).…”

supporting

confidence: 82%

Late Glacial to Holocene Indian Summer Monsoon Variability Based upon Sediment Records Taken from the Bay of Bengal

Rashid¹,

England²,

Thompson³

et al. 2011

Terr. Atmos. Ocean. Sci.

148

View full text Add to dashboard Cite

show abstract

“…The H5 record suggests a decreasing trend of ISM strength, which is supported by most of the other well-dated and high-resolution ISM records in ISM margin areas Sun et al, 2016;Xu et al, 2012Xu et al, , 2013a. A previous study has indicated that solar irradiance has a significant influence on the ISM on multi-decadal to centennial timescales, and that reduced solar output is correlated with weaker ISM winds (Gupta et al, 2005). However, solar irradiance has increased since 1810-1820 CE (Bard et al, 2000;Lean et al, 1995) and therefore it cannot be the main reason for the weaker ISM since 1820 CE.…”

Section: Interannual Variability Of the Ism Inferred From The Regionamentioning

confidence: 54%

Decreasing Indian summer monsoon on the northern Indian sub-continent during the last 180 years: evidence from five tree-ring cellulose oxygen isotope chronologies

Sano

Dimri

et al. 2018

Clim. Past

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Abstract. We have constructed a regional tree-ring cellulose oxygen isotope (δ 18 O) record for the northern Indian subcontinent based on two new records from northern India and central Nepal and three published records from northwestern India, western Nepal and Bhutan. The record spans the common interval from 1743 to 2008 CE. Correlation analysis reveals that the record is significantly and negatively correlated with the three regional climatic indices: all India rainfall (AIR; r = −0.5, p < 0.001, n = 138), Indian monsoon index (IMI; r = −0.45, p < 0.001, n = 51) and the intensity of monsoonal circulation (r = −0.42, p < 0.001, n = 51). The close relationship between tree-ring cellulose δ 18 O and the Indian summer monsoon (ISM) can be explained by oxygen isotope fractionation mechanisms. Our results indicate that the regional tree-ring cellulose δ 18 O record is suitable for reconstructing high-resolution changes in the ISM. The record exhibits significant interannual and long-term variations. Interannual changes are closely related to the El Niño-Southern Oscillation (ENSO), which indicates that the ISM was affected by ENSO in the past. However, the ISM-ENSO relationship was not consistent over time, and it may be partly modulated by Indian Ocean sea surface temperature (SST). Long-term changes in the regional tree-ring δ 18 O record indicate a possible trend of weakened ISM intensity since 1820. Decreasing ISM activity is also observed in various high-resolution ISM records from southwest China and Southeast Asia, and may be the result of reduced land-ocean thermal contrasts since 1820 CE.

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“…Clemens et al, 2003;, and solar activities have been hypothesized as the driver of a 1500-yr cycle in Holocene monsoon dynamics (e.g. Gupta et al, 2005;. However, the patterns and causes of decadal-centennial variability are not well understood due to the limits in the length of observational records and relatively coarse resolution of proxy data.…”

Section: Introductionmentioning

confidence: 99%

Variability of summer precipitation over Eastern China during the last millennium

et al. 2009

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Abstract.We use measurements of recent decades, 1500-yr proxy data, and millennium model simulations with a variety of climate facings to study the temporal and spatial variability of summer precipitation over eastern China. Spectral analysis of the proxy data using multi-taper method reveals three statistically significant bidecadal (15-35-yr), pendadecadal (40-60-yr), and centennial (65-170-yr) oscillation bands. The results of wavelet filtering show that the amplitudes of these bands vary substantially through time depending on the temperature regimes. Weak centennial oscillation and strong pentadecadal oscillation occur in warm conditions, whereas both the centennial and pentadecadal oscillations are strong in cold conditions. A model/data intercomparison suggests that pentadecadal and bidecadal oscillations could be associated with internal variability of the climate system. It is also found that the increased frequency of drought-in-north/flood-in-south spatial pattern over eastern China during the last two decades is unusual in the past five centuries.

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Solar influence on the Indian summer monsoon during the Holocene

Cited by 349 publications

References 36 publications

Late Glacial to Holocene Indian Summer Monsoon Variability Based upon Sediment Records Taken from the Bay of Bengal

Late Glacial to Holocene Indian Summer Monsoon Variability Based upon Sediment Records Taken from the Bay of Bengal

Decreasing Indian summer monsoon on the northern Indian sub-continent during the last 180 years: evidence from five tree-ring cellulose oxygen isotope chronologies

Variability of summer precipitation over Eastern China during the last millennium

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