An evaluation of snowline data across New Guinea during the last major glaciation, and area-based glacier snowlines in the Mt. Jaya region of Papua, Indonesia, during the Last Glacial Maximum

Prentice, M. L.; Hope, Geoffrey; Maryunani, Khoiril Anwar; Peterson, James A.

doi:10.1016/j.quaint.2005.02.008

Cited by 56 publications

(14 citation statements)

References 38 publications

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“…Furthermore, limited pollen data suggest that climatic conditions in New Guinea highland likely remained humid during 35–10 ka (Haberle, 1998; Williams et al , 2009). In addition, the increasing erosion rate resulting from expanded glaciers during the austral spring could be a possible factor for this pattern (Prentice et al , 2005). These results suggest that even though the precipitation decreased in LGM at the Sahul Land and other lowlands, terrestrial detritus could still be supplied by the fluvial processes in the relatively humid PNG highland.…”

Section: Discussionsupporting

confidence: 91%

“…These terrestrial flux minima and maxima appear to link to the large‐amplitude glacio‐eustatic sea‐level changes of the 100 ka cycle. In addition, glacier growth on the highest mountains in PNG could promote the glacial erosion of terrestrial detritus during the cooling periods (Prentice et al , 2005). The retreat of mountain glaciers might be also one factor in the minima of 232 Th activity and detritus fluxes in MIS 1 and MIS 5.5.…”

Section: Discussionmentioning

confidence: 99%

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Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

Shiau

Chen

Huh

et al. 2012

J Quaternary Science

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The Australian summer monsoon (ASM) is primarily a synoptic feature determined by the differential thermal response to solar insolation between the Australian continent and the western Pacific warm pool (WPWP) in austral summer. Little is known about the process involved in driving long‐term ASM variability. Here we present a 180 ka record of terrestrial fluxes into offshore southeastern Papua New Guinea (PNG), a prevailing monsoon area in the WPWP. Terrestrial fluxes were estimated by a 230Th‐normalized method, indicating higher terrestrial inputs into the ocean during glacial stages. We argue that the higher terrestrial fluxes are mainly fluvial, which in turn are linked to stronger ASM precipitation on land, though the increased terrestrial flux could possibly also be due to the lowstand or glacial erosion of mountain glaciers. Cross‐spectral analysis indicates that the ASM precipitation maxima are controlled by local summer insolation maxima, WPWP sea‐surface temperature minima and East Asian winter monsoon (EAWM) maxima in precession frequency bands (21 ka−1). This result suggests that the 21 ka components of the ASM in the past 180 ka are not only insolation driven but also a dynamic component strengthened by cross‐hemispheric pressure gradient resulted from the precession maxima forcing. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

Shiau

Chen

Huh

et al. 2012

J Quaternary Science

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“…Prentice et al (2005) report evidence for a glacial advance early in the period and a later advance around 17ka, followed by a full retreat by 15ka. At maximum, ice covered about 2200km 2 and alpine grasslands about 50,000km 2 of the island's spine.…”

Section: Humans and The Lgmmentioning

confidence: 96%

Pleistocene occupation of New Guinea's highland and subalpine environments

2006

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New Guinea's mountains provide an important case study for understanding early modern human environmental adaptability and early developments leading to agriculture. Evidence is presented showing that human colonization pre-dated 35ka (ka ¼ thousands of uncalibrated radiocarbon years before present) and was accompanied by landscape modification using fire. Sorties into the subalpine zone may have occurred before the Late Glacial Maximum (LGM), and perhaps contributed to megafaunal extinction. Humans persisted in the intermontane valleys through the LGM and expanded rapidly into the subalpine on climatic warming, when burning and clearance may have retarded vegetation re-colonization. Plant food use dates from at least 31ka, confirming that some of New Guinea's distinctive agricultural practices date to the earliest millennia of human presence.

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“…Currently only discontinuous remnants occur above 4800 m (Kaser et al ., 2004; Cullen et al ., 2006). In New Guinea, the equilibrium line has increased from around 3600–4000 m during the last glacial maximum to around 4850 m (Prentice et al ., 2005; Hastenrath, 2009).…”

Section: Past Climate Change In Tropical Alpine Environmentsmentioning

confidence: 99%

Potential impacts of climate change on the environmental services of humid tropical alpine regions

Buytaert

Cuesta²,

Tobón

2010

Global Ecology and Biogeography

360

258

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Aim Humid tropical alpine environments are crucial ecosystems that sustain biodiversity, biological processes, carbon storage and surface water provision. They are identified as one of the terrestrial ecosystems most vulnerable to global environmental change. Despite their vulnerability, and the importance for regional biodiversity conservation and socio-economic development, they are among the least studied and described ecosystems in the world. This paper reviews the state of knowledge about tropical alpine environments, and provides an integrated assessment of the potential threats of global climate change on the major ecosystem processes.Location Humid tropical alpine regions occur between the upper forest line and the perennial snow border in the upper regions of the Andes, the Afroalpine belt and Indonesia and Papua New Guinea.Results and main conclusions Climate change will displace ecosystem boundaries and strongly reduce the total area of tropical alpine regions. Displacement and increased isolation of the remaining patches will induce species extinction and biodiversity loss. Drier and warmer soil conditions will cause a faster organic carbon turnover, decreasing the below-ground organic carbon storage. Since most of the organic carbon is currently stored in the soils, it is unlikely that an increase in above-ground biomass will be able to offset soil carbon loss at an ecosystem level. Therefore a net release of carbon to the atmosphere is expected. Changes in precipitation patterns, increased evapotranspiration and alterations of the soil properties will have a major impact on water supply. Many regions are in danger of a significantly reduced or less reliable stream flow. The magnitude and even the trend of most of these effects depend strongly on local climatic, hydrological and ecological conditions. The extreme spatial gradients in these conditions put the sustainability of ecosystem management at risk.

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An evaluation of snowline data across New Guinea during the last major glaciation, and area-based glacier snowlines in the Mt. Jaya region of Papua, Indonesia, during the Last Glacial Maximum

Cited by 56 publications

References 38 publications

Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

Insolation and cross‐hemispheric controls on Australian monsoon variability over the past 180 ka: new evidence from offshore southeastern Papua New Guinea

Pleistocene occupation of New Guinea's highland and subalpine environments

Potential impacts of climate change on the environmental services of humid tropical alpine regions

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