The national security implications of solar geoengineering: an Australian perspective

ABSTRACT

Given current emissions trends an increase in global temperatures in excess of 2°C is highly likely in the coming century. In this context, it seems increasingly probable that states may consider solar geoengineering as a stop-gap climate response. Solar geoengineering refers to measures that aim to alleviate some measure of global warming by intentionally increasing the amount of the sun’s energy that is reflected into space. Currently the two most discussed solar geoengineering techniques involve either marine cloud brightening or dispersing aerosols in the stratosphere. These techniques could be relatively inexpensive, are within the technological capacities (after a brief period of development) of technologically-advanced countries, and could have an almost immediate impact on temperatures. Yet, while solar geoengineering might potentially be utilised to manage some climate-linked security threats, it itself would create new security challenges. Consequently, this paper explores potential international security implications for Australia if a regional state, or group of states, initiates a solar geoengineering program. We conclude that since solar geoengineering is unlikely to become a first-order international issue, disputation over solar geoengineering will likely reflect, or act as a proxy for, wider patterns of state interaction. However, scenarios in which China and the United States take different positions, or in which there are divisions among regional powers, such as Indonesia, Malaysia, India and Singapore would pose the greatest threat to Australia’s national security.     

Bring Me Three Large Beers: Wooden Tankards at Roman Vindolanda

This paper presents, and places in context, two tankard staves and part of a lathe‐turned tankard base, all made from yew wood (Taxus baccata), identified as part of a review of over 1500 wooden small finds from the Roman fort of Vindolanda. These were originally part of large, skilfully produced, communal drinking vessels of a type that has recently been the subject of a major review. Wooden tankards of this type are currently considered to be at their earliest a Late Iron Age phenomenon but one which extends well into the Roman period and which has, so far, been recognized predominantly within Britain. The three elements, found at Vindolanda, must have derived from three separate vessels and come from different periods within the site. This paper explores, adds to and amplifies current thinking on the construction, use and discard of these vessels and, in particular, considers how the tankards were perceived within the context of a Roman fort.     

At the dawn of Arabian fisheries: Fishing activities of the inhabitants of the Neolithic tripartite house of Marawah Island,Abu Dhabi Emirate (United Arab Emirates)

This paper presents the results of a study of nearly 8000 fish bones from MR11 Area A, a Neolithic stone-built house located on Marawah Island, United Arab Emirates. Radiocarbon dating indicates that the site was inhabited from the first half of the 6th to the mid-5th millennium BC, making it one of the oldest Neolithic occupation sites in the whole of the Arabian Gulf. Initial excavations between 2003 and 2004 revealed a single room and then more recent excavations in 2016–2017 uncovered two adjacent structures which proved to be a tripartite house. Examination of the fish remains from this particular site allows both a spatial and diachronic analysis. Archaeo-ichthyological studies can determine the role of fisheries within the subsistence strategies of past societies and the fishing techniques they adopted. This study provides important evidence regarding coastal and island lifestyle during the Neolithic. It outlines the predominance of small coastal fish such as grunts, emperors, and seabreams in the faunal assemblage. It thus suggests that fishing was essentially carried out in the surrounding shallow waters where soft-bottoms and seagrass meadows predominate. Non-selective fishing techniques probably involved the use of small-mesh devices such as beach seines and coastal barrier traps.