ORCID Profile
0000-0003-4051-7568
Current Organisation
William Paterson University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Related Links
Publications
Abrupt increase in east Indonesian rainfall from flooding of the Sunda Shelf ~9500years ago
Publisher: Elsevier BV
Date: 08-2013
Western Pacific hydroclimate linked to global climate variability over the past two millennia
Publisher: Springer Science and Business Media LLC
Date: 08-06-2016
DOI: 10.1038/NCOMMS11719
Abstract: Interdecadal modes of tropical Pacific ocean-atmosphere circulation have a strong influence on global temperature, yet the extent to which these phenomena influence global climate on multicentury timescales is still poorly known. Here we present a 2,000-year, multiproxy reconstruction of western Pacific hydroclimate from two speleothem records for southeastern Indonesia. The composite record shows pronounced shifts in monsoon rainfall that are antiphased with precipitation records for East Asia and the central-eastern equatorial Pacific. These meridional and zonal patterns are best explained by a poleward expansion of the Australasian Intertropical Convergence Zone and weakening of the Pacific Walker circulation (PWC) between ∼1000 and 1500 CE Conversely, an equatorward contraction of the Intertropical Convergence Zone and strengthened PWC occurred between ∼1500 and 1900 CE . Our findings, together with climate model simulations, highlight the likelihood that century-scale variations in tropical Pacific climate modes can significantly modulate radiatively forced shifts in global temperature.
Antarctic link with East Asian summer monsoon variability during the Heinrich Stadial–Bølling interstadial transition
Publisher: Elsevier BV
Date: 11-2016
Increasing Australian-Indonesian monsoon rainfall linked to early Holocene sea-level rise
Publisher: Springer Science and Business Media LLC
Date: 02-08-2009
DOI: 10.1038/NGEO605
Hydrological control of the dead carbon fraction in a Holocene tropical speleothem
Publisher: Elsevier BV
Date: 12-2012
East Asian hydroclimate modulated by the position of the westerlies during Termination I.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 02-11-2018
Abstract: Speleothem oxygen isotope records have revolutionized our understanding of the paleo East Asian monsoon, yet there is fundamental disagreement on what they represent in terms of the hydroclimate changes. We report a multiproxy speleothem record of monsoon evolution during the last deglaciation from the middle Yangtze region, which indicates a wetter central eastern China during North Atlantic cooling episodes, despite the oxygen isotopic record suggesting a weaker monsoon. We show that this apparent contradiction can be resolved if the changes are interpreted as a lengthening of the Meiyu rains and shortened post-Meiyu stage, in accordance with a recent hypothesis. Model simulations support this interpretation and further reveal the role of the westerlies in communicating the North Atlantic influence to the East Asian climate.
Australasian monsoon response to Dansgaard-Oeschger event 21 and teleconnections to higher latitudes
Publisher: Elsevier BV
Date: 05-2013
Hydroclimatic variability in Southeast Asia over the past two millennia
Publisher: Elsevier BV
Date: 11-2019
Rapid interhemispheric climate links via the Australasian monsoon during the last deglaciation
Publisher: Springer Science and Business Media LLC
Date: 06-12-2013
DOI: 10.1038/NCOMMS3908
Abstract: Recent studies have proposed that millennial-scale reorganization of the ocean-atmosphere circulation drives increased upwelling in the Southern Ocean, leading to rising atmospheric carbon dioxide levels and ice age terminations. Southward migration of the global monsoon is thought to link the hemispheres during deglaciation, but vital evidence from the southern sector of the vast Australasian monsoon system is yet to emerge. Here we present a 230thorium-dated stalagmite oxygen isotope record of millennial-scale changes in Australian-Indonesian monsoon rainfall over the last 31,000 years. The record shows that abrupt southward shifts of the Australian-Indonesian monsoon were synchronous with North Atlantic cold intervals 17,600-11,500 years ago. The most prominent southward shift occurred in lock-step with Heinrich Stadial 1 (17,600-14,600 years ago), and rising atmospheric carbon dioxide. Our findings show that millennial-scale climate change was transmitted rapidly across Australasia and lend support to the idea that the 3,000-year-long Heinrich 1 interval could have been critical in driving the last deglaciation.
Palaeoenvironmental change in tropical Australasia over the last 30,000 years - a synthesis by the OZ-INTIMATE group
Publisher: Elsevier BV
Date: 08-2013
Comparing proxy and model estimates of hydroclimate variability and change over the Common Era
Publisher: Copernicus GmbH
Date: 20-12-2017
Abstract: Abstract. Water availability is fundamental to societies and ecosystems, but our understanding of variations in hydroclimate (including extreme events, flooding, and decadal periods of drought) is limited because of a paucity of modern instrumental observations that are distributed unevenly across the globe and only span parts of the 20th and 21st centuries. Such data coverage is insufficient for characterizing hydroclimate and its associated dynamics because of its multidecadal to centennial variability and highly regionalized spatial signature. High-resolution (seasonal to decadal) hydroclimatic proxies that span all or parts of the Common Era (CE) and paleoclimate simulations from climate models are therefore important tools for augmenting our understanding of hydroclimate variability. In particular, the comparison of the two sources of information is critical for addressing the uncertainties and limitations of both while enriching each of their interpretations. We review the principal proxy data available for hydroclimatic reconstructions over the CE and highlight the contemporary understanding of how these proxies are interpreted as hydroclimate indicators. We also review the available last-millennium simulations from fully coupled climate models and discuss several outstanding challenges associated with simulating hydroclimate variability and change over the CE. A specific review of simulated hydroclimatic changes forced by volcanic events is provided, as is a discussion of expected improvements in estimated radiative forcings, models, and their implementation in the future. Our review of hydroclimatic proxies and last-millennium model simulations is used as the basis for articulating a variety of considerations and best practices for how to perform proxy–model comparisons of CE hydroclimate. This discussion provides a framework for how best to evaluate hydroclimate variability and its associated dynamics using these comparisons and how they can better inform interpretations of both proxy data and model simulations. We subsequently explore means of using proxy–model comparisons to better constrain and characterize future hydroclimate risks. This is explored specifically in the context of several ex les that demonstrate how proxy–model comparisons can be used to quantitatively constrain future hydroclimatic risks as estimated from climate model projections.
Evidence for Holocene changes in Australian–Indonesian monsoon rainfall from stalagmite trace element and stable isotope ratios
Publisher: Elsevier BV
Date: 15-03-2010
Younger Dryas-Holocene temperature and rainfall history of southern Indonesia from δ18O in speleothem calcite and fluid inclusions
Publisher: Elsevier BV
Date: 06-2010
Related Organisations
Related Funding Activities
No related grants have been discovered for Michael Griffiths.