Alan N Williams
Datos Biográficos
| ID | 3636945 |
|---|---|
| NOMBRE | Alan N Williams |
| NOMBRES | Alan N |
| APELLIDO | Williams |
| FIRMA | WILLIAMS A N |
| AFILIACIONES | Extent Heritage Pty Ltd, Pyrmont, NSW 2009 |
| VERIFICADO | No |
| TOTAL DE OBRAS | 13 |
| TOTAL DE CITAS | 22 |
| TOTAL COMO AUTOR | 13 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2010 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2022 |
| ÍNDICE H | 3 |
Past Aboriginal Populations and Demographic Change Using Radiocarbon Data and Time-Series Analysis
The use of radiocarbon data as a proxy for past human demography has become common in many parts of the world with increasingly sophisticated techniques developed in the last decade. Australian archaeologists have been at the forefront of this research. Using this technique, the authors show that at a continent scale Aboriginal population remained low—in the tens of thousands—throughout the Pleistocene, followed by a stepwise growth in the last 1…
Directionally supervised cellular automaton for the initial peopling of Sahul
Reconstructing the patterns of expansion out of Africa and across the globe by modern Homo sapiens have been advanced using demographic and travel-cost models. However, modelled routes are ipso facto influenced by migration rates, and vice versa. It is therefore timely to combine these two intertwined phenomena in reconstructing the migratory history of our species. We applied such an approach to one of the world’s earliest peopling events in Sah…
Smith, Mike
Veth, Peter M.
Australian Deserts
Human-environmental interactions in Mediterranean climate regions from the Pleistocene to the Anthropocene
From mobile hunter-gatherers to a series of state societies, Mediterranean climate regions (MED) around the world have been critical areas for human and biological evolution for millennia. Comprised of five regions on six continents, the MED are important today for human settlement, global food production, transportation, industry, and tourism, but these regions are also extremely vulnerable to projected changes in their typically temperate clima…
Investigating Subantarctic 14 C Ages of Different Peat Components
Precise radiocarbon ( 14 C) dating of sedimentary sequences is important for developing robust chronologies of environmental change, but sampling of suitable components can be challenging in highly dynamic landscapes. Here we investigate radiocarbon determinations of different peat size fractions from six peat sites, representing a range of geomorphological contexts on the South Atlantic subantarctic islands of the Falklands and South Georgia. To…
When did Homo sapiens first reach Southeast Asia and Sahul?
Anatomically modern humans ( Homo sapiens , AMH) began spreading across Eurasia from Africa and adjacent Southwest Asia about 50,000–55,000 years ago ( ca . 50–55 ka). Some have argued that human genetic, fossil, and archaeological data indicate one or more prior dispersals, possibly as early as 120 ka. A recently reported age estimate of 65 ka for Madjedbebe, an archaeological site in northern Sahul (Pleistocene Australia–New Guinea), if correct…
Anomalous mid-twentieth century atmospheric circulation change over the South Atlantic compared to the last 6000 years
Determining the timing and impact of anthropogenic climate change in data-sparse regions is a considerable challenge. Arguably, nowhere is this more difficult than the Antarctic Peninsula and the subantarctic South Atlantic where observational records are relatively short but where high rates of warming have been experienced since records began. Here we interrogate recently developed monthly-resolved observational datasets from the Falkland Islan…
Advances in arid zone archaeology
Radiometric dates are a robust proxy for long‐term demographic change
Attenbrow and Hiscock (2015) raise a series of concerns about the use of radiocarbon dates as data (sum probability distributions), including sample selection, taphonomic bias, and the relationship of charcoal and radiocarbon data to human activity. We show that these concerns have been widely acknowledged and addressed in the literature. We advocate the considered use of dates as data approaches as a heuristic tool for broad regional‐ and contin…
The use of summed radiocarbon probability distributions in archaeology
Hunter‐gatherer response to late Holocene climatic variability in northern and central Australia
Sum probability analysis of 1275 radiometric ages from 608 archaeological sites across northern and central Australia demonstrates a changing archaeological signature that can be closely correlated with climate variability over the last 2 ka. Results reveal a marked increase in archaeological records across northern and central Australia over the last 2 ka, with notable declines in western and northern Australia between ca. AD 700 and 1000 and po…
Human-environmental interactions in Mediterranean climate regions from the Pleistocene to the Anthropocene
From mobile hunter-gatherers to a series of state societies, Mediterranean climate regions (MED) around the world have been critical areas for human and biological evolution for millennia. Comprised of five regions on six continents, the MED are important today for human settlement, global food production, transportation, industry, and tourism, but these regions are also extremely vulnerable to projected changes in their typically temperate clima…
Radiometric dates are a robust proxy for long‐term demographic change
Attenbrow and Hiscock (2015) raise a series of concerns about the use of radiocarbon dates as data (sum probability distributions), including sample selection, taphonomic bias, and the relationship of charcoal and radiocarbon data to human activity. We show that these concerns have been widely acknowledged and addressed in the literature. We advocate the considered use of dates as data approaches as a heuristic tool for broad regional‐ and contin…
Investigating Subantarctic 14 C Ages of Different Peat Components
Precise radiocarbon ( 14 C) dating of sedimentary sequences is important for developing robust chronologies of environmental change, but sampling of suitable components can be challenging in highly dynamic landscapes. Here we investigate radiocarbon determinations of different peat size fractions from six peat sites, representing a range of geomorphological contexts on the South Atlantic subantarctic islands of the Falklands and South Georgia. To…
Hunter‐gatherer response to late Holocene climatic variability in northern and central Australia
Sum probability analysis of 1275 radiometric ages from 608 archaeological sites across northern and central Australia demonstrates a changing archaeological signature that can be closely correlated with climate variability over the last 2 ka. Results reveal a marked increase in archaeological records across northern and central Australia over the last 2 ka, with notable declines in western and northern Australia between ca. AD 700 and 1000 and po…
The use of summed radiocarbon probability distributions in archaeology
Anomalous mid-twentieth century atmospheric circulation change over the South Atlantic compared to the last 6000 years
Determining the timing and impact of anthropogenic climate change in data-sparse regions is a considerable challenge. Arguably, nowhere is this more difficult than the Antarctic Peninsula and the subantarctic South Atlantic where observational records are relatively short but where high rates of warming have been experienced since records began. Here we interrogate recently developed monthly-resolved observational datasets from the Falkland Islan…
Advances in arid zone archaeology
Radiometric dates are a robust proxy for long‐term demographic change
Attenbrow and Hiscock (2015) raise a series of concerns about the use of radiocarbon dates as data (sum probability distributions), including sample selection, taphonomic bias, and the relationship of charcoal and radiocarbon data to human activity. We show that these concerns have been widely acknowledged and addressed in the literature. We advocate the considered use of dates as data approaches as a heuristic tool for broad regional‐ and contin…
When did Homo sapiens first reach Southeast Asia and Sahul?
Anatomically modern humans ( Homo sapiens , AMH) began spreading across Eurasia from Africa and adjacent Southwest Asia about 50,000–55,000 years ago ( ca . 50–55 ka). Some have argued that human genetic, fossil, and archaeological data indicate one or more prior dispersals, possibly as early as 120 ka. A recently reported age estimate of 65 ka for Madjedbebe, an archaeological site in northern Sahul (Pleistocene Australia–New Guinea), if correct…
Investigating Subantarctic 14 C Ages of Different Peat Components
Precise radiocarbon ( 14 C) dating of sedimentary sequences is important for developing robust chronologies of environmental change, but sampling of suitable components can be challenging in highly dynamic landscapes. Here we investigate radiocarbon determinations of different peat size fractions from six peat sites, representing a range of geomorphological contexts on the South Atlantic subantarctic islands of the Falklands and South Georgia. To…
Smith, Mike
Veth, Peter M.
Australian Deserts
Human-environmental interactions in Mediterranean climate regions from the Pleistocene to the Anthropocene
From mobile hunter-gatherers to a series of state societies, Mediterranean climate regions (MED) around the world have been critical areas for human and biological evolution for millennia. Comprised of five regions on six continents, the MED are important today for human settlement, global food production, transportation, industry, and tourism, but these regions are also extremely vulnerable to projected changes in their typically temperate clima…
Past Aboriginal Populations and Demographic Change Using Radiocarbon Data and Time-Series Analysis
The use of radiocarbon data as a proxy for past human demography has become common in many parts of the world with increasingly sophisticated techniques developed in the last decade. Australian archaeologists have been at the forefront of this research. Using this technique, the authors show that at a continent scale Aboriginal population remained low—in the tens of thousands—throughout the Pleistocene, followed by a stepwise growth in the last 1…
Directionally supervised cellular automaton for the initial peopling of Sahul
Reconstructing the patterns of expansion out of Africa and across the globe by modern Homo sapiens have been advanced using demographic and travel-cost models. However, modelled routes are ipso facto influenced by migration rates, and vice versa. It is therefore timely to combine these two intertwined phenomena in reconstructing the migratory history of our species. We applied such an approach to one of the world’s earliest peopling events in Sah…
Archaeology (10 obras) · Geography (10 obras) · Archaeology and ancient environmental studies (9 obras) · Geology and Paleoclimatology Research (8 obras) · Pleistocene-Era Hominins and Archaeology (6 obras) · Geology (5 obras) · Physical geography (5 obras) · Climate change (4 obras) · Geology (4 obras) · Radiocarbon dating (4 obras)