title: IntCal04 terrestrial radiocarbon age calibration, 0–26 cal kyr BP

authors: Reimer, Paula J.

subjects: calibration curve

abstract: A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0–26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than IntCal98. Dendrochronologically-dated tree-ring samples cover the period from 0–12.4 cal kyr BP. Beyond the end of the tree rings, data from marine records (corals and foraminifera) are converted to the atmospheric equivalent with a site-specific marine reservoir correction to provide terrestrial calibration from 12.4–26.0 cal kyr BP. A substantial enhancement relative to IntCal98 is the introduction of a coherent statistical approach based on a random walk model, which takes into account the uncertainty in both the calendar age and the ¹⁴C age to calculate the underlying calibration curve (Buck and Blackwell, this issue). The tree-ring data sets, sources of uncertainty, and regional offsets are discussed here. The marine data sets and calibration curve for marine samples from the surface mixed layer (Marine04) are discussed in brief, but details are presented in Hughen et al. (this issue a). We do not make a recommendation for calibration beyond 26 cal kyr BP at this time; however, potential calibration data sets are compared in another paper (van der Plicht et al., this issue).

text: IntCal04 terrestrial radiocarbon age calibration, 0–26 cal kyr BP A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0–26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than IntCal98. Dendrochronologically-dated tree-ring samples cover the period from 0–12.4 cal kyr BP. Beyond the end of the tree rings, data from marine records (corals and foraminifera) are converted to the atmospheric equivalent with a site-specific marine reservoir correction to provide terrestrial calibration from 12.4–26.0 cal kyr BP. A substantial enhancement relative to IntCal98 is the introduction of a coherent statistical approach based on a random walk model, which takes into account the uncertainty in both the calendar age and the ¹⁴C age to calculate the underlying calibration curve (Buck and Blackwell, this issue). The tree-ring data sets, sources of uncertainty, and regional offsets are discussed here. The marine data sets and calibration curve for marine samples from the surface mixed layer (Marine04) are discussed in brief, but details are presented in Hughen et al. (this issue a). We do not make a recommendation for calibration beyond 26 cal kyr BP at this time; however, potential calibration data sets are compared in another paper (van der Plicht et al., this issue).

year: 2004

title: Cost Optimal Area Allocation in Heat Exchanger Networks

authors: Walmsley, Timothy Gordon

abstract: This paper discusses the cost optimal area allocation in heat exchanger networks.

text: Cost Optimal Area Allocation in Heat Exchanger Networks This paper discusses the cost optimal area allocation in heat exchanger networks.

year: 2013-10-01

title: Indigenous Peoples and the State - International Perspectives on the Treaty of Waitangi [Book Review]

authors: Te Aho, Linda

abstract: Just over thirty years ago, in the High Court decision Huakina Development Trust v Waikato Valley Authority, Justice Chilwell famously stated: “There can be no doubt that the Treaty is part of the fabric of New Zealand society.” ¹ At a symposium celebrating 30 years of the Huakina decision, Tom Bennion described the judgment as “a marker, a significant new structure sticking out in the legal landscape, indicating the shape of arguments to come.” This collection of work brings together a range of arguments for our time concerning the meaning and importance of the Treaty of Waitangi, shaped by different perspectives on its context and history.

text: Indigenous Peoples and the State - International Perspectives on the Treaty of Waitangi [Book Review] Just over thirty years ago, in the High Court decision Huakina Development Trust v Waikato Valley Authority, Justice Chilwell famously stated: “There can be no doubt that the Treaty is part of the fabric of New Zealand society.” ¹ At a symposium celebrating 30 years of the Huakina decision, Tom Bennion described the judgment as “a marker, a significant new structure sticking out in the legal landscape, indicating the shape of arguments to come.” This collection of work brings together a range of arguments for our time concerning the meaning and importance of the Treaty of Waitangi, shaped by different perspectives on its context and history.

year: 2019