title: Multi-decadal variations in Southern Hemisphere atmospheric ¹⁴C: Evidence against a Southern Ocean sink at the end of the Little Ice Age CO₂ anomaly.

authors: Turney, Chris S.M.

abstract: Northern Hemisphere-wide cooling during the Little Ice Age (LIA; CE 1650-1775) is associated with a ~5 ppmv decrease in atmospheric carbon dioxide. Changes in terrestrial and ocean carbon reservoirs have been postulated as possible drivers of this relatively large shift in atmospheric CO₂, potentially providing insights into the mechanisms and sensitivity of the global carbon cycle. Here we report decadally-resolved radiocarbon (¹⁴C) levels in a network of tree rings series spanning CE 1700-1950 located along the northern boundary of, and within, the Southern Ocean. We observe regional dilutions in atmospheric radiocarbon (relative to the Northern Hemisphere) associated with upwelling of ¹⁴CO₂–depleted abyssal waters. We find the inter-hemispheric ¹⁴C offset approaches zero during increasing global atmospheric CO₂ at the end of the LIA, with reduced ventilation in the Southern Ocean and a Northern Hemisphere source of old carbon (most probably originating from deep Arctic peat layers). The coincidence of the atmospheric CO₂ increase and reduction in the inter-hemispheric ¹⁴C offset imply a common climate control. Possible mechanisms of synchronous change in the high latitudes of both hemispheres are discussed.

text: Multi-decadal variations in Southern Hemisphere atmospheric ¹⁴C: Evidence against a Southern Ocean sink at the end of the Little Ice Age CO₂ anomaly. Northern Hemisphere-wide cooling during the Little Ice Age (LIA; CE 1650-1775) is associated with a ~5 ppmv decrease in atmospheric carbon dioxide. Changes in terrestrial and ocean carbon reservoirs have been postulated as possible drivers of this relatively large shift in atmospheric CO₂, potentially providing insights into the mechanisms and sensitivity of the global carbon cycle. Here we report decadally-resolved radiocarbon (¹⁴C) levels in a network of tree rings series spanning CE 1700-1950 located along the northern boundary of, and within, the Southern Ocean. We observe regional dilutions in atmospheric radiocarbon (relative to the Northern Hemisphere) associated with upwelling of ¹⁴CO₂–depleted abyssal waters. We find the inter-hemispheric ¹⁴C offset approaches zero during increasing global atmospheric CO₂ at the end of the LIA, with reduced ventilation in the Southern Ocean and a Northern Hemisphere source of old carbon (most probably originating from deep Arctic peat layers). The coincidence of the atmospheric CO₂ increase and reduction in the inter-hemispheric ¹⁴C offset imply a common climate control. Possible mechanisms of synchronous change in the high latitudes of both hemispheres are discussed.

year: 2016

title: RECOLED: A group-aware collaborative text editor for capturing document history

authors: Masoodian, Masood

subjects: computer science

abstract: This paper presents a usability analysis of RECOLED, a shared document editor which supports recording of audio communication in remote collaborative writing sessions, and transparent monitoring of interactions, such as editing, gesturing and scrolling. The editor has been designed so that the collaboration results in the production of a multimedia document history which enriches the final product of the writing activity and can serve as a basis for post-meeting information retrieval. A discussion is presented on how post-meeting processing can highlight the usefulness of such histories in terms of tracking information that would be normally lost in usual collaborative editing settings.

text: RECOLED: A group-aware collaborative text editor for capturing document history This paper presents a usability analysis of RECOLED, a shared document editor which supports recording of audio communication in remote collaborative writing sessions, and transparent monitoring of interactions, such as editing, gesturing and scrolling. The editor has been designed so that the collaboration results in the production of a multimedia document history which enriches the final product of the writing activity and can serve as a basis for post-meeting information retrieval. A discussion is presented on how post-meeting processing can highlight the usefulness of such histories in terms of tracking information that would be normally lost in usual collaborative editing settings.

year: 2005

title: The Unmet Legal, Social and Cultural Needs of Māori with Disabilities

authors: Hickey, Susan Jane

subjects: Māori

abstract: There is little work done in the area of indigenous disability identity issues and how they are recognised in domestic and international human rights laws. The discourse of disability has always been based on social constructionism and without it, there is no identity. I discuss its relevance to indigenous (Māori) with disabilities and how the multiplicitous nature of the identity of  other  has a particular impact when indigenous, gender and disability are all identified from marginalised groups. I also explore the impact of westernised thinking around impairment, in particular the models of disabilities on indigenous well-being. The issues of family (whānau), whakawhanaungatanga (family relationships), interdependence (community) and collectivity identities central to indigenous thinking are largely ignored by law and policy, yet central to indigenous identity. This ignorance in policy has led to the disparities that continue to remain for indigenous persons with disabilities, particularly those from within thematic identity groups.

text: The Unmet Legal, Social and Cultural Needs of Māori with Disabilities There is little work done in the area of indigenous disability identity issues and how they are recognised in domestic and international human rights laws. The discourse of disability has always been based on social constructionism and without it, there is no identity. I discuss its relevance to indigenous (Māori) with disabilities and how the multiplicitous nature of the identity of  other  has a particular impact when indigenous, gender and disability are all identified from marginalised groups. I also explore the impact of westernised thinking around impairment, in particular the models of disabilities on indigenous well-being. The issues of family (whānau), whakawhanaungatanga (family relationships), interdependence (community) and collectivity identities central to indigenous thinking are largely ignored by law and policy, yet central to indigenous identity. This ignorance in policy has led to the disparities that continue to remain for indigenous persons with disabilities, particularly those from within thematic identity groups.

year: 2008