title: Antarctic lakes suggest millennial reorganizations of Southern Hemisphere atmospheric and oceanic circulation

authors: Hall, Brenda L.

subjects: Antarctica

abstract: The phasing of millennial-scale oscillations in Antarctica relative to those elsewhere in the world is important for discriminating among models for abrupt climate change, particularly those involving the Southern Ocean. However, records of millennial-scale variability from Antarctica dating to the last glacial maximum are rare and rely heavily on data from widely spaced ice cores, some of which show little variability through that time. Here, we present new data from closed-basin lakes in the Dry Valleys region of East Antarctica that show high-magnitude, high-frequency oscillations in surface level during the late Pleistocene synchronous with climate fluctuations elsewhere in the Southern Hemisphere. These data suggest a coherent Southern Hemisphere pattern of climate change on millennial time scales, at least in the Pacific sector, and indicate that any hypothesis concerning the origin of these events must account for synchronous changes in both high and temperate latitudes.

text: Antarctic lakes suggest millennial reorganizations of Southern Hemisphere atmospheric and oceanic circulation The phasing of millennial-scale oscillations in Antarctica relative to those elsewhere in the world is important for discriminating among models for abrupt climate change, particularly those involving the Southern Ocean. However, records of millennial-scale variability from Antarctica dating to the last glacial maximum are rare and rely heavily on data from widely spaced ice cores, some of which show little variability through that time. Here, we present new data from closed-basin lakes in the Dry Valleys region of East Antarctica that show high-magnitude, high-frequency oscillations in surface level during the late Pleistocene synchronous with climate fluctuations elsewhere in the Southern Hemisphere. These data suggest a coherent Southern Hemisphere pattern of climate change on millennial time scales, at least in the Pacific sector, and indicate that any hypothesis concerning the origin of these events must account for synchronous changes in both high and temperate latitudes.

year: 2010

title: Investigating the relationships between the yield curve, output and inflation using an arbitrage-free version of the Nelson and Siegel class of yield curve models

authors: Krippner, Leo

subjects: yield curve

abstract: This article provides a theoretical economic foundation for the popular Nelson and Siegel (1987) class of yield curve models (which has been absent up to now). This foundation also offers a new framework for investigating and interpreting the relationships between the yield curve, output and inflation that have already been well-established empirically in the literature. Specifically, the level of the yield curve as measured by the VAO model is predicted to have a cointegrating relationship with inflation, and the shape of the yield curve as measured by the VAO model is predicted to correspond to the profile (that is, timing and magnitude) of future changes in the output gap (that is, output growth less the growth in potential output). These relationships are confirmed in the empirical analysis on 50 years of United States data.

text: Investigating the relationships between the yield curve, output and inflation using an arbitrage-free version of the Nelson and Siegel class of yield curve models This article provides a theoretical economic foundation for the popular Nelson and Siegel (1987) class of yield curve models (which has been absent up to now). This foundation also offers a new framework for investigating and interpreting the relationships between the yield curve, output and inflation that have already been well-established empirically in the literature. Specifically, the level of the yield curve as measured by the VAO model is predicted to have a cointegrating relationship with inflation, and the shape of the yield curve as measured by the VAO model is predicted to correspond to the profile (that is, timing and magnitude) of future changes in the output gap (that is, output growth less the growth in potential output). These relationships are confirmed in the empirical analysis on 50 years of United States data.

year: 2005-02

title: Kava and Maaori: New drug fashion or re-engagement with 'kawa'? [Invited presentation]

authors: Aporosa, S. 'Apo'

abstract: It is estimated there are more than 20,000 kava users in New Zealand on an average Friday or Saturday night, with increasing interest and uptake of this indigenous drink by Māori. This presentation argues that some of that increased use of kava by Māori can be interpreted as a cultural expression of pre-migration Hawaiki, rather than simply a new interaction with a foreign drug substance.

text: Kava and Maaori: New drug fashion or re-engagement with 'kawa'? [Invited presentation] It is estimated there are more than 20,000 kava users in New Zealand on an average Friday or Saturday night, with increasing interest and uptake of this indigenous drink by Māori. This presentation argues that some of that increased use of kava by Māori can be interpreted as a cultural expression of pre-migration Hawaiki, rather than simply a new interaction with a foreign drug substance.

year: 2016