Enhanced impacts of the North Pacific Victoria mode on the Indian summer monsoon onset in recent decades
Tóm tắt
Victoria mode (VM), the second dominant mode of North Pacific sea surface temperature variability, has been identified as one of the important factors influencing the Indian summer monsoon (ISM) onset. The positive phase of the May VM delays the ISM onset by both tropical and extratropical pathways. Here, we found a significant interdecadal enhancement of their relationship since the early 1990s, which is mainly attributed to the structure changes and increased variance of the VM. In recent decades, the VM has shown more significant warm SST anomalies in the tropical central Pacific, which drive the large-scale divergent circulation more effectively. This enhanced divergent circulation leads to low-level divergence and reduced rainfall in the tropical Asian summer monsoon region. The reduced rainfall excites equatorial Rossby wave response and anomalous easterly winds in the northern Indian Ocean, delaying the ISM onset. Besides, the increased variance of the VM after 1992/1993 stimulates a stronger extratropical Rossby wave train. This stationary Rossby wave train induces a stronger cooling to the northwest of India, which weakens the land-sea thermal contrast and leads to the delayed ISM onset. This finding should be taken into account to improve short-term predictions of the monsoon onset.
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Tài liệu tham khảo
Aru H, Chen W, Chen S (2021) Is there any improvement in simulation of the wintertime Western Pacific teleconnection pattern and associated climate anomalies in CMIP6 compared to CMIP5 models? J Clim 34:8841–8861
Aru H, Chen S, Chen W (2022) Change in the variability in the Western Pacific pattern during boreal winter: roles of tropical Pacific sea surface temperature anomalies and North Pacific storm track activity. Clim Dyn 58:2451–2468
Bombardi RJ, Kinter JL, Frauenfeld OW (2019) A global gridded dataset of the characteristics of the rainy and dry seasons. Bull Am Meteor Soc 100:1315–1328
Bombardi RJ, Moron V, Goodnight JS (2020) Detection, variability, and predictability of monsoon onset and withdrawal dates: a review. Int J Climatol 40:641–667
Bond NA, Overland JE, Spillane M, Stabeno P (2003) Recent shifts in the state of the North Pacific. Geophys Res Lett. https://doi.org/10.1029/2003GL018597
Chen M, Xie P, Janowiak JE, Arkin PA (2002) Global land precipitation: a 50-yr monthly analysis based on gauge observations. J Hydrometeorol 3:249–266
Chen W, Wang L, Feng J, Wen Z, Ma T, Yang X, Wang C (2019) Recent progress in studies of the variabilities and mechanisms of the East Asian monsoon in a changing climate. Adv Atmos Sci 36:887–901
Chen W et al (2023) Recent advances in understanding multi-scale climate variability of the Asian monsoon. Adv Atmos Sci 40:1429–1456
Ding R, Li J, Tseng Y-H, Sun C, Guo Y (2015) The Victoria mode in the North Pacific linking extratropical sea level pressure variations to ENSO. J Geophys Res Atmos 120:27–45
Gill AE (1980) Some simple solutions for heat-induced tropical circulation. Q J R Meteorol Soc 106:447–462
Hu P, Chen W, Chen S, Wang L, Liu Y (2022a) The weakening relationship between ENSO and the South China Sea summer monsoon onset in recent decades. Adv Atmos Sci. https://doi.org/10.1007/s00376-021-1208-6
Hu P, Chen W, Chen S, Liu Y, Wang L, Huang R (2022b) The leading mode and factors for coherent variations among the subsystems of tropical Asian summer monsoon onset. J Clim 35:1597–1612
Hu P, Chen W, Wang L, Chen S, Liu Y, Chen L (2022c) Revisiting the ENSO–monsoonal rainfall relationship: new insights based on an objective determination of the Asian summer monsoon duration. Environ Res Lett 17:104050
Hu P, Chen W, Chen S, Wang L, Liu Y (2023) Impacts of Pacific Ocean SST on the interdecadal variations of tropical Asian summer monsoon onset: new eastward-propagating mechanisms. Clim Dyn 61:4733–4748
Hu P, Chen W, Chen S et al (2024) Revisiting the linkage between the Pacific-Japan pattern and Indian summer monsoon rainfall: the crucial role of the Maritime Continent. Geophys Res Lett 51:e2023GL106982
Joseph PV, Sooraj KP, Rajan CK (2006) The summer monsoon onset process over South Asia and an objective method for the date of monsoon onset over Kerala. Int J Climatol 26:1871–1893
Kalnay E et al (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteor Soc 77:437–472
Kumar KK, Rajagopalan B, Cane MA (1999) On the weakening relationship between the Indian monsoon and ENSO. Science 284:2156–2159
Kumar KK, Rajagopalan B, Hoerling M, Bates G, Cane M (2006) Unraveling the mystery of Indian monsoon failure during El Niño. Science 314:115–119
Lee J-Y, Wang B, Wheeler MC, Fu X, Waliser DE, Kang I-S (2013) Real-time multivariate indices for the boreal summer intraseasonal oscillation over the Asian summer monsoon region. Clim Dyn 40:493–509
Li J, Thompson D (2021) Widespread changes in surface temperature persistence under climate change. Nature 599:425–430
Li Z, Ding R, Mao J, Ren Z (2023) Understanding the driving forces of the North Pacific Victoria mode. J Clim 36:6547–6560
Liu Z, Di Lorenzo E (2018) Mechanisms and predictability of Pacific decadal variability. Curr Clim Change Rep 4:128–144
Liu B, Duan Y (2023) Diverse interannual variability of Asian summer monsoon onset process. Geophys Res Lett 50:e2022GL100583
Matsuno T (1966) Quasi-geostrophic motions in the equatorial area. J Meteorol Soc Jpn 44:25–43
Newman M et al (2016) The Pacific decadal oscillation, revisited. J Clim 29:4399–4427
Noska R, Misra V (2016) Characterizing the onset and demise of the Indian summer monsoon. Geophys Res Lett 43:4547–4554
Pai DS, Rajeevan MN (2009) Summer monsoon onset over Kerala: new definition and prediction. J Earth Syst Sci 118:123–135
Qian Y, Hsu P-C, Kazuyoshi K (2019) New real-time indices for the quasi-biweekly oscillation over the Asian summer monsoon region. Clim Dyn 53:2603–2624
Rayner N et al (2003) Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. J Geophys Res Atmos 108:4407
Takaya K, Nakamura H (2001) A formulation of a phase-independent wave-activity flux for stationary and migratory quasigeostrophic eddies on a zonally varying basic flow. J Atmos Sci 58:608–627
Tian Z, Ding R, Zhou X (2024) Effect of eastward shift of North Pacific Oscillation on the wind-evaporation-SST feedback. Clim Dyn. https://doi.org/10.1007/s00382-023-07061-6
Wang B, Ding Q, Joseph PV (2009) Objective definition of the Indian summer monsoon onset. J Clim 22:3303–3316
Watanabe T, Yamazaki K (2014) Decadal-scale variation of South Asian summer monsoon onset and its relationship with the Pacific decadal oscillation. J Clim 27:5163–5173
Xiang B, Wang B (2013) Mechanisms for the advanced Asian summer monsoon onset since the mid-to-late 1990s. J Clim 26:1993–2009
Yang X, Huang P (2021) Restored relationship between ENSO and Indian summer monsoon rainfall around 1999/2000. Innovation 2:100102
Yeh SW, Yi DW, Sung MK et al (2018) An eastward shift of the North Pacific Oscillation after the mid-1990s and its relationship with ENSO. Geophys Res Lett 45:6654–6660
Yu SY, Fan L, Zhang Y, Zheng XT, Li Z (2021a) Reexamining the Indian summer monsoon rainfall–ENSO relationship from its recovery in the 21st century: role of the Indian Ocean SST anomaly associated with types of ENSO evolution. Geophys Res Lett 48:e2021GL092873
Yu W, Liu YM, Yang XQ, Wu GX, He B, Li JX, Bao Q (2021b) Impact of North Atlantic SST and Tibetan Plateau forcing on seasonal transition of springtime South Asian monsoon circulation. Clim Dyn 56:559–579
Yu W et al (2022) Potential impact of spring thermal forcing over the Tibetan Plateau on the following winter El Niño-Southern Oscillation. Geophys Res Lett 49:e2021GL097234
Zhang S, Hu P, Huang G, Qu X (2024) Observed impacts of the North Pacific Victoria Mode on Indian summer monsoon onset. Atmos Res 297:107126