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Changes to the drivers of fire weather with a warming climate a case study of southeast Tasmania

Citation

Grose, MR and Fox-Hughes, P and Harris, RM and Bindoff, NL, Changes to the drivers of fire weather with a warming climate - a case study of southeast Tasmania, Climatic Change, 124, (1-2) pp. 255-269. ISSN 0165-0009 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Springer

DOI: doi:10.1007/s10584-014-1070-y

Abstract

Projected changes to the global climate system have great implications for the incidence of large infrequent fires in many regions. Here we examine the synoptic-scale and local-scale influences on the incidence of extreme fire weather days and consider projections of the large-scale mean climate to explore future fire weather projections. We focus on a case study region with periodic extreme fire dangers; southeast Tasmania, Australia. We compare the performance of a dynamically downscaled regional climate model with Global Climate Model outputs as a tool for examining the local-scale influences while accounting for high regional variability. Many of the worst fires in Tasmania and the southeast Australian region are associated with deep cold fronts and strong prefrontal winds. The downscaled simulations reproduce this synoptic type with greater fidelity than a typical global climate model. The incidence of systems in this category is projected to increase through the century under a high emission scenario, driven mainly by an increase in the temperature of air masses, with little change in the strength of the systems. The regional climate model projected increase in frequency is smaller than for the global climate models used as input, with a large model range and natural variability. We also demonstrate how a blocking Foehn effect and topographic channelling contributed to the extreme conditions during an extreme fire weather day in Tasmania in January 2013. Effects such as these are likely to contribute to high fire danger throughout the century. Regional climate models are useful tools that enable various meteorological drivers of fire danger to be considered in projections of future fire danger.

Item Details

Item Type:Refereed Article
Keywords:climate change, extreme fire weather days, Tasmania
Research Division:Earth Sciences
Research Group:Atmospheric Sciences
Research Field:Climate Change Processes
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate Change Adaptation Measures
Author:Grose, MR (Dr Michael Grose)
Author:Harris, RM (Dr Rebecca Harris)
Author:Bindoff, NL (Professor Nathan Bindoff)
ID Code:92164
Year Published:2014
Web of Science® Times Cited:4
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2014-06-07
Last Modified:2015-02-23
Downloads:0

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