Search

The diurnal cycle of precipitation and its associated land‐sea breeze circulation over coastal northern Australia are investigated using surface wind speed and enthalpy (latent and sensible heat) fluxes from the Cyclone Global Navigation Satellite System. Composite results during the austral summer of 2018–2022 show that diurnal precipitation propagates westward from the Cape York Peninsula into the Gulf of Carpentaria. The diurnal cycle of precipitation and surface wind speed are strongly coupled, with the wind speed maximum slightly leading the precipitation maximum. Additionally, analysis of the moist static energy budget shows that surface fluxes help support the westward‐propagation of diurnal precipitation. These results—based on novel satellite data and reanalysis—are consistent with previous studies that have examined the impact of the land‐sea breeze on the diurnal cycle of precipitation. The results provide a benchmark for model representation of this important atmosphere‐ocean‐land interaction. Plain Language Summary: The modulation of the diurnal cycle of precipitation over coastal northern Australia by surface winds was studied using the recently launched NASA Cyclone Global Navigation Satellite System (CYGNSS). Results show a strong connection between the daily cycles of precipitation and surface wind speed, with an offshore wind speed maximum leading the precipitation maximum by a few hours. Westward propagation of diurnal precipitation and wind speed signals occurs from the Cape York Peninsula into the Gulf of Carpentaria. A thermodynamic analysis supports the importance of the wind speed signal and associated surface fluxes for fostering offshore precipitation propagation. The novelty of this paper lies in the use of the new CYGNSS retrievals, which provide better space and time coverage of surface wind speed than previous satellite‐based measurements and are not as negatively affected by precipitation contamination. Key Points: Cyclone Global Navigation Satellite System wind speeds and latent heat fluxes are used to study the diurnal cycle over the northern Australia coastal regionEnhanced diurnal precipitation is associated with enhanced surface wind speed and convergenceDiurnal precipitation and surface wind speed signals propagate westward in tandem from the Cape York Peninsula [ABSTRACT FROM AUTHOR]

This paper examines invasion of grasslands on Cape York Peninsula, Australia, by Melaleuca viridiflora and other woody species, and the role of storm-burning (lighting fires after the first wet season rains) in their maintenance. Trends in disturbance features, fuel characteristics, ground layer composition, and woody plants dynamics under combinations of withholding fire and storm-burning over a 3-year period were measured on 19 plots in three landscape settings. Population dynamics of M. viridiflora are described in detail and 20-year population projections based on transition matrices under different fire regimes generated. Numerous M. viridiflora suckers occurred within the grass layer, increasing each year regardless of fire regime, and were rapidly recruited to the canopy in the absence of fire. Storm-burning had little impact on fuel, ground layer or woody plant composition, but maintained open vegetation structure by substantially reducing recruitment of M. viridiflora suckers to the sapling layer, and by reducing the above-grass-layer abundance of several other invasive woody species. Population projections indicated that withholding fire for 20 years could cause a sevenfold increase of M. viridiflora density on Ti-tree flats, and that annual to triennial storm-burning should be effective at maintaining a stable open vegetation structure. These findings argue against vegetation thickening being an inevitable consequence of climate change. We conclude that a fire regime that includes regular storm-burning can be effective for maintaining grasslands and grassy woodlands being invaded by M. viridiflora. [ABSTRACT FROM AUTHOR]

The year 2006 marks the quatercentenary of the first known European charting of any part of the Australian coastline, when the Dutch mariner Willem Janszoon explored 300 kms of the north-west coast of Cape York Peninsula. He bestowed seven placenames, two of which, Moent and Dubbelde Ree have ambiguous meanings or referents. This paper attempts to resolve the enigmas behind these names by considering geographic, linguistic and historical evidence. Moent is particularly challenging, with several possible linguistic sources, some more plausible than others. The most compelling evidence points to it either referring to the western entrance to Endeavour Strait, or a Dutch rendition of an Indigenous Australian word. Dubbelde Ree is less problematic. The issue surrounding this name is whether its second element is meant to be Ree, an abbreviation of Reede (‘Roadstead’), or Rev, an abbreviation of Revier (‘River’). The search for the meaning of these placenames has provided credible evidence demonstrating that Janszoon explored the coastline in greater detail than has hitherto been thought, and that, in all likelihood, made contact with the local inhabitants. [ABSTRACT FROM AUTHOR]

This paper develops an alternative interpretation of shell mound phenomena at Albatross Bay, near Weipa on the west coast of Cape York Peninsula. Past researchers have interpreted these distinct mounded middens as functional edifices, constructed to enable small family groups to camp closer to resources during the late wet season. Here I propose that the mounds at Weipa were associated with relatively large groups of people intensively exploiting the shell fish Anadara granosa. This argument is based on a range of factors, including the biological characteristics of Anadara, a species that makes up over 904570360f the composition of shell mounds, as well as archaeological and ethnographic evidence. [ABSTRACT FROM AUTHOR]

Five new species of bees are described from the Quinkan region of Cape York Peninsula, Queensland, Australia: Austrothurgus nanussp. nov. (Megachilidae), Nomia (Paulynomia) eburatasp. nov. (Halictidae), Leioproctus (Protomorpha) quinkanensissp. nov., Chrysocolletes loripessp. nov., Chrysocolletesaureussp. nov. (Colletidae). A sixth species, Chrysocolletes doreyisp. nov. (Colletidae), is described from Walker Creek, East of Karumba in the Gulf Country, Queensland. Most descriptions are associated with DNA‐barcodes. Modified identification keys and image plates with diagnostic characters are provided. [ABSTRACT FROM AUTHOR]

Copyright of Archaeology in Oceania is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the roaming of Indigenous community dogs and potential interaction with wild dogs and dingoes. Design Cross-sectional survey and longitudinal follow-up study. Methods Six remote Indigenous communities in Cape York Peninsula and Arnhem Land in northern Australia were selected. Hair samples were collected from community dogs and microsatellite DNA analyses were used to determine hybrid (>10% dingo DNA) status. Dogs were fitted with GPS collars and home range (ha) was estimated during monitoring periods of up to 3 days. Results In Cape York Peninsula, 6% of the 35 dogs sampled were dingo hybrids, whereas in Arnhem Land 41% of the 29 dogs sampled were hybrids. The median extended home range was estimated to be 4.54 ha (interquartile range, 3.40 − 7.71). Seven community dogs were identified with an estimated home range > 20 ha and home ranges included the bushland surrounding communities. No significant difference in home ranges was detected between hybrid and non-hybrid dogs. Conclusions Study results provide some evidence (dingo hybridisation, bushland forays) of the potential interaction between domestic and wild dogs in northern Australia. The nature of this interaction needs further investigation to determine its role in disease transmission; for example, in the case of a rabies incursion in this region. [ABSTRACT FROM AUTHOR]

B actrocera frauenfeldi ( Schiner), the 'mango fruit fly', is a horticultural pest originating from the Papua New Guinea region. It was first detected in Australia on Cape York Peninsula in north Queensland in 1974 and had spread to Cairns by 1994 and Townsville by 1997. B actrocera frauenfeldi has not been recorded further south since then despite its invasive potential, an absence of any controls and an abundance of hosts in southern areas. Analysis of cue-lure trapping data from 1997 to 2012 in relation to environmental variables shows that the distribution of B . frauenfeldi in Queensland correlates to locations with a minimum temperature for the coldest month >13.2°C, annual temperature range <19.3°C, mean temperature of the driest quarter >20.2°C, precipitation of the wettest month >268 mm, precipitation of the wettest quarter >697 mm, temperature seasonality <30.9°C (i.e. lower temperature variability) and areas with higher human population per square kilometre. Annual temperature range was the most important variable in predicting this species' distribution. Predictive distribution maps based on an uncorrelated subset of these variables reasonably reflected the current distribution of this species in northern Australia and predicted other areas in the world potentially at risk from invasion by this species. This analysis shows that the distribution of B . frauenfeldi in Australia is correlated to certain environmental variables that have most likely limited this species' spread southward in Queensland. This is of importance to Australian horticulture in demonstrating that B . frauenfeldi is unlikely to establish in horticultural production areas further south than Townsville. [ABSTRACT FROM AUTHOR]

The Weipa Mission (1898-1932) on Cape York Peninsula (north-eastern Australia) was one of seven Australian missions designed and staffed by the Moravian Church during the nineteenth and early twentieth centuries. We present findings of archaeological and historical research that illustrate key aspects of the settlement's development and operations. Moravian missionaries at Weipa aimed to create a built landscape that reshaped Aboriginal social, cultural and economic relations, with particular emphasis on children through the use of a dormitory system. However, their efforts were mediated by the open spatial and social boundaries of the settlement, which enabled Aboriginal people to make choices about the nature and extent to which they engaged with the mission. Adopting a political economy approach, we show that this openness emerged through complex social relationships between missionaries and Aboriginal people. While missionaries required access to children and adults, they lacked the ability (or will) to maintain a resident population through force, with limited financial resources also hampering their activities. Instead, Aboriginal people came and went from the settlement, with some establishing and maintaining social relationships with missionaries to access economic and social benefits. We argue that these social relationships led to the development of the settlement as a more open domain. [ABSTRACT FROM AUTHOR]

Observations and analyses of low-level convergence lines over the Gulf of Carpentaria region of northeastern Australia made during the second and third Gulf Lines EXperiments (GLEX II and GLEX III) are reported. During GLEX II, the initiation of the North Australian Cloud Line (NACL) was documented using a small autonomous aircraft and two Doppler sodars. NACLs are long convergence lines that form on the western side of northern Cape York Peninsula and are typically marked by a line of contiguous cumulus or cumulus congestus cloud. The observations show that the degree of asymmetry between west-coast and east-coast sea breezes (as characterized by the wind field) depends on the strength of the background easterlies, and that NACLs develop only when the background easterlies are sufficiently large (≥ 5 m s−1). GLEX III focused on morning glories, which are (mostly) southwestward-moving bore-like convergence lines that originate over the southern part of the gulf region. The field experiment involved Doppler sodar measurements as well as high-temporal-resolution data from operational automatic weather stations. The sodar measurements showed that undular bore-like morning glory cloud lines develop only when the background easterlies are sufficiently weak (≤ 10 m s−1) and that strong bore-like morning glories develop when the background winds exceed about 10 m s−1. If the background easterlies are too strong, no morning glories develop. Numerical simulations show that the structure of convergence line produced depends on the strength of the collision between the sea breezes from each side of the Cape York Peninsula, which in turn depends on the strength of the background easterlies. When the easterlies are weak (≤ 10 m s−1), the sea breezes have similar depths and strengths, and their collision is relatively violent, whereas when the background easterlies are strong (> 10 m s−1) the sea breezes have very different depths and strengths and their collision is comparatively benign. [ABSTRACT FROM AUTHOR]

Discusses reasons for optimism regarding the future of Indigenous health in Australia. Willingness of Premier Peter Beattie to engage with Noel Pearson and other leaders as they seek solutions for the people of Cape York; Intimate familiarity of Indigenous Australians with disadvantage and the ramifications of the change of political tides; Cape York's Alcohol Management Plans; Appreciation of the history of black-white relations in Australia.

To study the prevalence of rheumatic disorders in two Aboriginal populations on the western coast of Cape York Peninsula.Physical and radiological examination of 217 adult Aborigines at Aurukun Aboriginal Mission and 71 Aboriginal adults at Weipa Mission. The study was performed in October 1965.Mild to moderate degenerative arthritis was not uncommon in the populations examined. However, generalised or nodal osteoarthritis was not seen. One young woman had definite sero-positive rheumatoid arthritis. This woman's appearance suggested some Torres Strait Islander influence. No case of gouty arthritis or classical ankylosing spondylitis was encountered. An incidental finding of retrospective interest was that the calculated body mass index showed that the majority of adults were underweight by Caucasian standards.These findings are of historic interest given the health impacts of social, cultural and environmental circumstances of Aborigines currently reported. [ABSTRACT FROM AUTHOR]

Accounts of European explorers between 1623 and 1880 indicate that fires were lit by Aboriginal people on Cape York Peninsula in northeast Australia throughout the dry season (May-October). Diaries kept by three generations of pastoralists in the Musgrave area (1913-1952, 1953-1974 and 1976-1992) show that burning activities were largely confined to a two to six week period between May and early August. The timing of burning depended on the amount and date of cessation of wet season rainfall. More rarely, 'storm-burning', burning under hot conditions within a few days of the first heavy rains of the wet season, was undertaken. Long-term pastoralists felt a responsibility to use fire wisely and had a detailed knowledge of the role of fire in land management. Their decisions to burn were based on the extent of grass curing, and soil and weather conditions, all of which affected the extent of each burn. They used early dry season fires mainly to maintain forage and control cattle movements. Storm-burns were reputed to control woody weeds, but were used infrequently because of difficulty in controlling their spread and uncertainty as to when the next rains would stimulate new grass growth. [ABSTRACT FROM AUTHOR]