Precession phasing offset between Indian summer monsoon and Arabian Sea productivity linked to changes in Atlantic overturning circulation

Ziegler, Martin; Lourens, Lucas Joost; Tuenter, E.; Hilgen, F.J.; Reichart, Gert‐Jan; Weber, Nanne

doi:10.1029/2009pa001884

Cited by 72 publications

(85 citation statements)

References 81 publications

(144 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This divergence in opinion has provoked a hot debate as to which proxies are representative of the Asian monsoon: the marine records from the Arabian Sea or the speleothem records from Asia (e.g., Clemens and Prell, 2007;Clemens et al, 2010;Ziegler et al, 2010a;Weber and Tuenter, 2011), which will be discussed in our follow-up work. Here, our goal is to note that the divergence in opinion is, at least partly, related to the different natures of the proxies used, with upwelling records based on wind being physically distinct from the speleothem records based on rain (e.g., Liu et al, 2006a;Clemens et al, 2010).…”

Section: P X Wang Et Al: the Global Monsoon Across Timescales 2013mentioning

confidence: 99%

The global monsoon across timescales: coherent variability of regional monsoons

et al. 2014

View full text Add to dashboard Cite

Abstract. Monsoon has earned increasing attention from the climate community since the last century, yet only recently have regional monsoons been recognized as a global system. It remains a debated issue, however, as to what extent and at which timescales the global monsoon can be viewed as a major mode of climate variability. For this purpose, a PAGES (Past Global Changes) working group (WG) was set up to investigate the concept of the global monsoon and its future research directions. The WG's synthesis is presented here. On the basis of observation and proxy data, the WG found that the regional monsoons can vary coherently, although not perfectly, at various timescales, varying between interannual, interdecadal, centennial, millennial, orbital and tectonic timescales, conforming to the global monsoon concept across timescales. Within the global monsoon system, each subsystem has its own features, depending on its geographic and topographic conditions. Discrimination between global and regional components in the monsoon system is a key to revealing the driving factors in monsoon variations; hence, the global monsoon concept helps to enhance our understanding and to improve future projections of the regional monsoons. This paper starts with a historical review of the global monsoon concept in both modern and paleoclimatology, and an assessment of monsoon proxies used in regional and global scales. The main body of the paper is devoted to a summary of observation data at various timescales, providing evidence of the coherent global monsoon system. The paper concludes with a projection of future monsoon shifts in a warming world. The synthesis will be followed by a companion paper addressing driving mechanisms and outstanding issues in global monsoon studies.

show abstract

Section: P X Wang Et Al: the Global Monsoon Across Timescales 2013mentioning

confidence: 99%

The global monsoon across timescales: coherent variability of regional monsoons

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Kutzbach, 1981). However, other monsoon records for which precession is not the dominant spectral feature, have a different phase in the precession band (often May or November) (Clemens and Prell, 2003;Clemens et al, 1991;Ziegler et al, 2010a). Because most of these latter records come from the Arabian Sea where the summer monsoon is well expressed, this late phase is usually accepted as the "monsoon phase", and the records that display an early phase are considered as independent tropical climatic phenomena.…”

Section: Relationship Between the Australian Summer Monsoon And Othermentioning

confidence: 99%

Past dynamics of the Australian monsoon: precession, phase and links to the global monsoon concept

et al. 2010

View full text Add to dashboard Cite

Past variations in the dynamics of the Australian monsoon have been estimated from multi-proxy analysis of a core retrieved in the Eastern Banda Sea. Records of coccolith and pollen assemblages, spanning the last 150 000 years, allow reconstruction of past primary production in the Banda Sea, summer moisture availability, and the length of the dry season in northern Australia and southeastern Indonesia. The amount of moisture available during the summer monsoon follows typical glacial/interglacial dynamics with a broad asymmetrical 100-kyr cycle. Primary production and length of the dry season appear to be closely related, given that they follow the precessional cycle with the same phase. This indicates their independence from ice-volume variations. The present inter-annual variability of both parameters is related to El Niño Southern Oscillation (ENSO), which modulates the Australian Winter Monsoon (AWM). The precessional pattern observed in the past dynamics of the AWM is found in ENSO and monsoon records of other regions. A marked shift in the monsoon intensity occurring during the mid Holocene during a period of constant ice volume, suggests that low latitude climatic variation precedes increases in global ice volume. This precessional pattern suggests that a common forcing mechanism underlies low latitude climate dynamics, acting specifically and synchronously on the different monsoon systems

show abstract

“…However, alternative mechanisms have been proposed to drive the observed changes in Arabian Sea biological productivity. For instance, D-O variability in the Arabian Sea records could also be controlled by changes in AMOC strength via its impact on the global nutrient distribution (Schmittner, 2005;Schmittner et al, 2007;Ziegler et al, 2010).…”

Section: Marzin Et Al: Indian Monsoon and North Atlantic Abrupt Cmentioning

confidence: 99%

Glacial fluctuations of the Indian monsoon and their relationship with North Atlantic climate: new data and modelling experiments

et al. 2013

View full text Add to dashboard Cite

Abstract. Several paleoclimate records such as from Chinese loess, speleothems or upwelling indicators in marine sediments present large variations of the Asian monsoon system during the last glaciation. Here, we present a new record from the northern Andaman Sea (core MD77-176) which shows the variations of the hydrological cycle of the Bay of Bengal. The high-resolution record of surface water δ18O dominantly reflects salinity changes and displays large millennial-scale oscillations over the period 40 000 to 11 000 yr BP. Their timing and sequence suggests that events of high (resp. low) salinity in the Bay of Bengal, i.e. weak (resp. strong) Indian monsoon, correspond to cold (resp. warm) events in the North Atlantic and Arctic, as documented by the Greenland ice core record. We use the IPSL_CM4 Atmosphere-Ocean coupled General Circulation Model to study the processes that could explain the teleconnection between the Indian monsoon and the North Atlantic climate. We first analyse a numerical experiment in which such a rapid event in the North Atlantic is obtained under glacial conditions by increasing the freshwater flux in the North Atlantic, which results in a reduction of the intensity of the Atlantic meridional overturning circulation. This freshwater hosing results in a weakening of the Indian monsoon rainfall and circulation. The changes in the continental runoff and local hydrological cycle are responsible for an increase in salinity in the Bay of Bengal. This therefore compares favourably with the new sea water δ18O record presented here and the hypothesis of synchronous cold North Atlantic and weak Indian monsoon events. Additional sensitivity experiments are produced with the LMDZ atmospheric model to analyse the teleconnection mechanisms between the North Atlantic and the Indian monsoon. The changes over the tropical Atlantic are shown to be essential in triggering perturbations of the subtropical jet over Africa and Eurasia, that in turn affect the intensity of the Indian monsoon. These relationships are also found to be valid in additional coupled model simulations in which the Atlantic meridional overturning circulation (AMOC) is forced to resume.

show abstract

Precession phasing offset between Indian summer monsoon and Arabian Sea productivity linked to changes in Atlantic overturning circulation

Cited by 72 publications

References 81 publications

The global monsoon across timescales: coherent variability of regional monsoons

The global monsoon across timescales: coherent variability of regional monsoons

Past dynamics of the Australian monsoon: precession, phase and links to the global monsoon concept

Glacial fluctuations of the Indian monsoon and their relationship with North Atlantic climate: new data and modelling experiments

Contact Info

Product

Resources

About