Orbital Asian summer monsoon dynamics revealed using an isotope-enabled global climate model

Caley, Thibaut; Roche, Didier M.; Renssen, H.

doi:10.1038/ncomms6371

Cited by 169 publications

(145 citation statements)

References 53 publications

(73 reference statements)

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“…The validity of speleothem oxygen isotope records as proxy for summer monsoon 609 intensity is still a matter of debate (Caley et al, 2014). Whereas Liu et al (2014) The SHL pollen-derived climate variables (this study) along with selected proxy records from 1210 the Western Pacific Ocean.…”

Section: Biomes Landscape Openness and Reconstructed Climate Variablmentioning

confidence: 99%

“…He et al, 2004;Zhao et al, 2009a; Wang et al, 100 2010;Cai et al, 2010; Clemens et al, 2010; Zhang et al, 2011; Ran and 101 Feng, 2013; Li et al, 2014;Yang et al, 2014), and (iii) the role of other factors, including 102 ocean-atmosphere interactions, solar activity, and high-low-latitude interactions, on the 103 regional climate (e.g. Wang and Qian, 2009;Caley et al, 2014;Jin et al, 2014). 104…”

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confidence: 99%

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Holocene vegetation and climate dynamics of NE China based on the pollen record from Sihailongwan Maar Lake

Stebich¹,

Rehfeld

Schlütz³

et al. 2015

Quaternary Science Reviews

251

164

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The East Asian summer monsoon (EASM) plays a major role in the global climate 63 system (Wang, 2009). In mid-latitude and southern Asia, ecosystems, rain-fed agriculture and 64 economic prosperity critically depend on the amount and distribution of monsoonal 65 precipitation (Yasuda and Shinde, 2004). Therefore, detailed knowledge of the monsoon 66 system variability is essential for understanding global climate processes and is of societal and 67 economic interest, particularly with regard to existing uncertainties in future rainfall 68 projections (Stocker et al., 2013). 69A large number of palaeoenvironmental records have already been generated to better 70 understand the spatio-temporal variability and control mechanisms of the Asian monsoon (e.g. 71 Wang et al., 2010;Cao et al., 2013;Ran and Feng, 2013;An, 2014;Yang et al., 2014). In 72 general, these studies primarily invoke local or regional moisture changes as most indicative 73 of variations in monsoon strength and large-scale circulation patterns. Particularly, oxygen 74 isotope records from speleothems in S/E China have substantially influenced palaeo-monsoon 75 research as they are well dated and widely considered to be high-resolution summer monsoon 76 proxies (e.g., Wang et al., 2005; Liu et al., 2014 suggesting a similar moisture evolution across the monsoon-influenced regions of China 82 (Zhao et al., 2009a; Zhang et al., 2011;Ran and Feng, 2013). 83However, other studies point to much more variability of the summer monsoon in space 84 and time. In particular, towards its northern margin, proxy records reveal region-specific 85 palaeoenvironmental changes, suggesting a complex interplay between the Indian summer 86 monsoon (ISM), the EASM and other major climatic factors, including topography and 87 vegetation (Hu et al., 2003; Maher and Hu, 2006;An et al., 2006;Zhao and Yu, 2012; Ran 88 and Feng, 2013). 89To reveal coherent spatio-temporal patterns of climate evolution in monsoonal Asia and 90 adjacent regions, available proxy data were used for summarizing compilations, over-regional 91 correlations, for constructing 'monsoon/moisture indices' and data-model comparisons (An, 92 2000;Ren and Beug, 2002; Morrill et al., 2003;An et al., 2006;Herzschuh, 2006; Chen et al., 93 2008; Zhao et al., 2009a,b;Cai et al., 2010;Wang et al., 2010; Kleinen et al., 2011; Zhao and 94 Yu, 2012;Cao et al., 2013, Dallmayer et al., 2013 Leipe et al., 2014;Yang et al., 2014). 95However, the regional behaviour of the summer monsoon and its over-regional linkages is far 96 from being well understood. This is reflected in ongoing debates regarding (i) the regional 97 impact of the major atmospheric circulation systems controlling moisture distribution patterns 98 in China (e.g. Clemens et al., 2010;Ran and Feng, 2013), (ii) the phase 99 relationships between these systems (e.g. He et al., 2004;Zhao et al., 2009a; Wang et al., 100 2010;Cai et al., 2010; Clemens et al., 2010; Zhang et al., 2011; Ran and 101 Feng, 2013; Li et al., 2014;Yang et al., 2014),...

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Section: Biomes Landscape Openness and Reconstructed Climate Variablmentioning

confidence: 99%

mentioning

confidence: 99%

Holocene vegetation and climate dynamics of NE China based on the pollen record from Sihailongwan Maar Lake

Stebich¹,

Rehfeld

Schlütz³

et al. 2015

Quaternary Science Reviews

251

164

View full text Add to dashboard Cite

show abstract

“…Although a surface-cooling anomaly of the WNP is observed in spring (not shown in the figure) in our CAM/SOM simulation, the SST change is not significant in the eastern tropical Pacific. Internal oceanic feedback could significantly influence the monsoon response to precessional forcing (Caley et al 2014); this feedback is not accounted for in this study, and warrants further study.…”

Section: Concluding Remarks and Discussionmentioning

confidence: 99%

Orbital control of the western North Pacific summer monsoon

Chiang

Hsu

et al. 2015

Clim Dyn

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spaceAbstract Orbital forcing exerts a strong influence on global monsoon systems, with higher summer insolation leading to stronger summer monsoons in the Northern Hemisphere. However, the associated regional and sea-sonal changes, particularly the interaction between regional monsoon systems, remain unclear. Simulations using the Community Earth System Model demonstrate that the western North Pacific (WNP) summer monsoon responds to orbital forcing opposite to that of other major Northern Hemisphere monsoon systems. Compared with its current climate state, the simulated WNP monsoon and associated lower-tropospheric trough is absent in the early Holocene when the precessionmodulated Northern Hemisphere summer insolation is higher, whereas the summer mon-soons in South and East Asia are stronger and shift farther northward. We attribute the weaker WNP monsoon to the stronger diabatic heating of the summer Asian monsoon-in particular over the southern Tibetan Plateau and Mari-time Continent-that in turn strengthens the North Pacific subtropical high through atmospheric teleconnections. By contrast, the impact of the midlatitude circulation changes on the WNP monsoon is weaker when the solar insola-tion is higher. Prior to the present WNP monsoon onset, the uppertropospheric East Asian jet stream weakens and shifts northward; the monsoon onset is highly affected by the jetinduced high potential vorticity intrusion. In the spaceinstance of the extreme perihelion-summer, the WNP mon-soon is suppressed despite a stronger midlatitude precursor than present-day, and the midlatitude circulation response to the enhanced South Asian precipitation is considerable. These conditions indicate internal monsoon interactions of an orbital scale, implying a potential mechanistic control of the WNP monsoon.

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“…The datasets had to cover more than 400 years of the Holocene, between 10 000BP and present day, and had to have sufficient overlap with at least one other complementary record. Note that we did not consider individual speleothem δ 18 O time series for our analyses, as the attribution to precipitation or temperature may be ambiguous on long timescales [5]. Preliminary analyses indicated that individual cave speleothem time series correlated more strongly with the temperature reconstructions in the set of reconstructions, than with the rainfall reconstructions (not shown).…”

Section: Paleoclimate Datamentioning

confidence: 99%

Warmer and wetter or warmer and dryer? Observed versus simulated covariability of Holocene temperature and rainfall in Asia

Rehfeld

Laepple

2016

Earth and Planetary Science Letters

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Temperatures in Asia, and globally, are very likely to increase with greenhouse gas emissions, but future projections of rainfall are far more uncertain. Here we investigate the linkage between temperature and precipitation in Asia on interannual to multicentennial timescales using instrumental data, late Holocene paleoclimate proxy data and climate model simulations. We find that in the instrumental and proxy data, the relationship between temperature and precipitation is timescale-dependent. While on annual to decadal timescales, negative correlations dominate and thus cool summers tend to be rainy summers, on longer timescales precipitation and temperature are positively correlated; cool centuries tend to be dryer centuries in monsoonal Asia. In contrast, the analyzed CMIP5/PMIP3 climate model simulations show a negative correlation between precipitation and temperature on all timescales. Although many uncertainties exist in the interpretation of the proxy data, there is consistency between them and the instrumental evidence. This, and the persistence of the result across independent proxy datasets, suggests that the climate model simulations might be considerably biased, overestimating the short-term negative associations between regional rainfall and temperature and lacking long-term positive relationships between them.

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Orbital Asian summer monsoon dynamics revealed using an isotope-enabled global climate model

Cited by 169 publications

References 53 publications

Holocene vegetation and climate dynamics of NE China based on the pollen record from Sihailongwan Maar Lake

Holocene vegetation and climate dynamics of NE China based on the pollen record from Sihailongwan Maar Lake

Orbital control of the western North Pacific summer monsoon

Warmer and wetter or warmer and dryer? Observed versus simulated covariability of Holocene temperature and rainfall in Asia

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