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CAWCR technical report, 66. Observing, Estimating and Forecasting Rainfall: From Science to Applications - abstracts of the seventh CAWCR Workshop
The CAWCR Workshop is an annual event and brings together national and international expertise to highlight latest development in research relevant to CAWCR and its stakeholders. It provides an opportunity to identify gaps, opportunities, build relationships and enhance the quality, breadth and depth of our research efforts. The CAWCR Workshop is an annual event and brings together national and international expertise to highlight latest development in research relevant to CAWCR and its stakeholders. It provides an opportunity to identify gaps, opportunities, build relationships and en ...
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CAWCR technical report, 61. Improvements in atmospheric physical parameterizations for the Australian Community Climate and Earth-System Simulator (ACCESS)
The Australian Community Climate and Earth-System Simulator (ACCESS) is a new coupled ocean and atmosphere climate modelling system being developed at the Centre for Australian Weather and Climate Research (CAWCR). ACCESS uses the UK Met Office Unified Model (Met UM, Davies et al. 2005) as its atmospheric component, which is coupled with the GFDL Ocean Model version 4.1 (MOM4p1, Griffies et al. 2009) and the Los Alamos National Laboratory Sea Ice Model version 4.1 (CICE4, Hunke and Lipscomb 2010), using the numerical coupler OASIS3.25 (Valcke 2006). The development of ACCESS has followed ...
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CAWCR technical report, 60. Defining heatwaves: heatwave defined as a heatimpact event servicing all community and business sectors in Australia
This report proposes a new objective definition for heatwaves and heatwave severity that may be applied to any location in Australia, or for that matter the world. Using this definition, it is now possible to compare severe and extreme heat events across time and space.
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CAWCR technical report, 57. The Community Atmosphere Biosphere Land Exchange (CABLE) model Roadmap for 2012-2017
Law Rachel M.; Raupach Mickael R.; Abramowitz G. - Centre for Australian Weather and Climate Research, 2012The Community Atmosphere Biosphere Land Exchange (CABLE) model describes landatmosphere exchanges of energy, carbon, water and momentum, together with related biogeochemical, vegetation-dynamic and disturbance processes. CABLE is coupled with several climate models including the UKMO Unified Model as part of ACCESS1.3, used in CAWCR for IPCC AR5 climate projections. CABLE is also a key part of the Australian contributions to two international projects: RECCAP (REgional Carbon Cycle Assessments and Processes), and LUCID (Land Use Change, IDentification of robust impacts).
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CAWCR technical report, 58. ACCESS Post-Processor Version 1.0
An important component of the submission of the ACCESS coupled model data to the Coupled Model Intercomparison Project Phase 5 (CMIP5) is publishing a comprehensive set of the CMIP5 requested data and ensuring the data meets the stringent CMIP5 format and quality requirements. CMIP5 specifies a standard for model output where each parameter is stored in a single NetCDF file and includes additional meta-data. These requirements are designed to make analysis of the data as straight forward as possible. This document describes the ACCESS Post-Processor (APP), and how it is used. The APP has been ...
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CAWCR technical report, 52. Ocean Model, Analysis and Prediction System: version 2
Brassington G.; Freeman John W.; Huang X.; et al. - Centre for Australian Weather and Climate Research, 2012The Bureau of Meteorology established operational ocean forecasting in August 2007 through the Ocean Model, Analysis and Prediction System (OceanMAPS). OceanMAPS was developed through the BLUElink project an Australian government partnership between the Australian Bureau of Meteorology, CSIRO and the Royal Australian Navy. A major upgrade to this system OceanMAPS version 2 (OceanMAPSv2) was implemented operationally in December 2011 developed through a follow-on BLUElink-2 project. The new system is based on the latest GFDL Modular Ocean Model version 4 and the BLUElink Ocean Data Assimilation ...
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CAWCR technical report, 51. Improvements in POAMA2 for the prediction of major climate drivers and south eastern Australian rainfall
Lim Eun-Pa; Hendon Harry H.; Langford Sally; et al. - Centre for Australian Weather and Climate Research, 2012Ocean-atmosphere interactions are key processes that drive seasonal climate variability. In the global sense, the atmosphere drives the upper ocean via heat flux, fresh water flux and wind stress (Anderson 2008). But in the tropics where the ocean surface temperature (hereafter, sea surface temperature, SST) is warm enough to trigger deep atmospheric convection, the ocean exerts strong controls on the atmosphere especially at longer time scales because of its slow variations and strong thermal inertia. Consequently, the highest predictability of atmospheric climate (e.g. temperature and rainfa ...
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CAWCR technical report, 48. Seasonal Climate Prediction in the Pacific using the POAMA coupled model forecast system
Cottrill A.; Hendon Harry H.; Lim Eun-Pa; et al. - Centre for Australian Weather and Climate Research, 2012The tropical Pacific Ocean basin is home to over 20 Pacific Island nations, many of which are sensitive to climate extremes from the El Niño-Southern Oscillation (ENSO) and rainfall variability associated the Inter-Tropical Convergence Zone and the South Pacific Convergence Zone. These Pacific Island countries are highly dependent on agriculture, fishing and tourism as a major source of food production and income, which can vary greatly depending on the weather and climate experienced from year to year. Hence, the provision of skilful seasonal forecasts is important to allow these countries to ...
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CAWCR technical report, 50. On the sensitivity of Australian temperature trends and variability to analysis methods and observation networks
Fawcett R.J.B.; Trewin B.; Braganza K.; et al. - Centre for Australian Weather and Climate Research, 2012This report presents an exploration of Australian temperature trends and variability using the new Australian Climate Observations Reference Network (ACORN) Surface Air Temperature (SAT) dataset. We compare changes in nationally and annually averaged daily-maximum, dailyminimum and daily-mean temperature variability to a range of alternative Australian temperature analyses over the last 100 years (1911-2010).
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CAWCR technical report, 49. Techniques involved in developing the Australian Climate Observations Reference Network - Surface Air Temperature (ACORN-SAT) dataset
The Australian Climate Observations Reference Network – Surface Air Temperature (ACORNSAT) data set is a long-term data set of Australian daily air temperature, covering the period from 1910 to the present. The purpose of this data set is to provide the best possible data set to underlie analyses of variability and change of temperature in Australia, including both analyses of annual and seasonal mean temperatures, and of extremes of temperature and other information derived from daily temperatures. A full discussion of the motivation underlying the ACORN-SAT data set is contained in a compani ...
CAWCR technical report, 43. Exploring the co-benefit of electric vehicle uptake and ozone pollution reduction in Sydney - Final report.
Given the likely pace of change in the electric vehicle market, it is important that the environmental externalities are identified and quantified. In this report we present the results of a modelling study which investigated how ozone pollution in the Greater Metropolitan Region of Sydney NSW, Australia would respond to the replacement of Sydney’s internal combustion engine (ICE) passenger vehicle fleet with a fleet of electric vehicles. A brief description of the modelling methodology is provided in the next section, and a summary of the modelling outcomes is provided in the following sectio ...
CAWCR technical report, 46. Abstracts of the Fifth International Verification Methods Workshop, 1 - 7 December 2011, Melbourne, Australia
This year's scientific workshop offers a stimulating and informative array of presentations on forecast verification relevant to a variety of topics including ensemble and probability forecasts, seasonal forecast and climate projections, aviation forecasts, user-focused verification, tropical cyclones and high impact weather forecasts and warnings, as well as methodologies and issues that apply to many areas. The workshop features five keynote talks by international experts, as well as a public lecture by renowned climate researcher, Professor Neville Nicholls of Monash University on, "Can wea ...
CAWCR technical report, 45. Evaluation of the TIGER SuperDARN Over-The-Horizon radar systems for providing remotely sensed marine and oceanographic data over the Southern Ocean
Greenwood Robert; Schuiz Eric; Parkinson Murray; et al. - Centre for Australian Weather and Climate Research, 2011The Tasman International Geospace Environment Radar systems (TIGER) located in Tasmania and New Zealand are High Frequency (HF) Over-The-Horizon Radar (OTHR) systems and represent Australia’s contribution to the Super Dual Auroral Radar Network (SuperDARN). SuperDARN is a network of more than 20 HF radars located at mid-high latitudes with fields of view covering the polar regions for the study of ionospheric physics. The TIGER systems have overlapping fields of view that cover much of the Southern Ocean in the Australian sector. The development and operation of TIGER has been led by La Trobe ...
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