Article Type:
Research Article

The Queensland Cloud Seeding Research Program

Sarah A. Tessendorf National Center for Atmospheric Research, Boulder, Colorado;

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Roelof T. Bruintjes National Center for Atmospheric Research, Boulder, Colorado;

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Courtney Weeks National Center for Atmospheric Research, Boulder, Colorado;

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James W. Wilson National Center for Atmospheric Research, Boulder, Colorado;

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Charles A. Knight National Center for Atmospheric Research, Boulder, Colorado;

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Rita D. Roberts National Center for Atmospheric Research, Boulder, Colorado;

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Justin R. Peter Queensland Climate Change Centre of Excellence, Indooroopilly, Queensland, and Monash University, Melbourne, Victoria, Australia

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Scott Collis Centre for Australian Weather and Climate Research, Melbourne, Victoria, Australia

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Peter R. Buseck Arizona State University, Tempe, Arizona

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Evelyn Freney Arizona State University, Tempe, Arizona

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Michael Dixon National Center for Atmospheric Research, Boulder, Colorado;

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Matthew Pocernich National Center for Atmospheric Research, Boulder, Colorado;

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Kyoko Ikeda National Center for Atmospheric Research, Boulder, Colorado;

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Duncan Axisa National Center for Atmospheric Research, Boulder, Colorado;

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Eric Nelson National Center for Atmospheric Research, Boulder, Colorado

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Peter T. May Centre for Australian Weather and Climate Research, Melbourne, Victoria, Australia

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Harald Richter Bureau of Meteorology Training Centre, Melbourne, Victoria, Australia

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Stuart Piketh University of the Witwatersrand, Johannesburg, South Africa

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Roelof P. Burger University of the Witwatersrand, Johannesburg, South Africa

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Louise Wilson Monash University, Melbourne, Victoria, Australia

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Steven T. Siems Monash University, Melbourne, Victoria, Australia

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Michael Manton Monash University, Melbourne, Victoria, Australia

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Roger C. Stone University of Southern Queensland, Toowoomba, Queensland, Australia

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Acacia Pepler Macquarie University, Sydney, New South Wales, Australia

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Don R. Collins Texas A&M University, College Station, Texas

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V. N. Bringi Colorado State University, Fort Collins, Colorado

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M. Thurai Colorado State University, Fort Collins, Colorado

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Lynne Turner Queensland Climate Change Centre of Excellence, Dutton Park, Queensland, Australia

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David McRae Queensland Climate Change Centre of Excellence, Dutton Park, Queensland, Australia

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Online Publication:
01 Jan 2012
Print Publication:
01 Jan 2012
DOI:
https://doi.org/10.1175/BAMS-D-11-00060.1
Page(s):
75–90
Full access

As a response to extreme water shortages in southeast Queensland, Australia, brought about by reduced rainfall and increasing population, the Queensland government decided to explore the potential for cloud seeding to enhance rainfall. The Queensland Cloud Seeding Research Program (QCSRP) was conducted in the southeast Queensland region near Brisbane during the 2008/09 wet seasons. In addition to conducting an initial exploratory, randomized (statistical) cloud seeding study, multiparameter radar measurements and in situ aircraft microphysical data were collected. This comprehensive set of observational platforms was designed to improve the physical understanding of the effects of both ambient aerosols and seeding material on precipitation formation in southeast Queensland clouds. This focus on gaining physical understanding, along with the unique combination of modern observational platforms utilized in the program, set it apart from previous cloud seeding research programs. The overarching goals of the QCSRP were to 1) determine the characteristics of local cloud systems (i.e., weather and climate), 2) document the properties of atmospheric aerosol and their microphysical effects on precipitation formation, and 3) assess the impact of cloud seeding on cloud microphysical and dynamical processes to enhance rainfall. During the course of the program, it became clear that there is great variability in the natural cloud systems in the southeast Queensland region, and understanding that variability would be necessary before any conclusions could be made regarding the impact of cloud seeding. This article presents research highlights and progress toward achieving the goals of the program, along with the challenges associated with conducting cloud seeding research experiments

As a response to extreme water shortages in southeast Queensland, Australia, brought about by reduced rainfall and increasing population, the Queensland government decided to explore the potential for cloud seeding to enhance rainfall. The Queensland Cloud Seeding Research Program (QCSRP) was conducted in the southeast Queensland region near Brisbane during the 2008/09 wet seasons. In addition to conducting an initial exploratory, randomized (statistical) cloud seeding study, multiparameter radar measurements and in situ aircraft microphysical data were collected. This comprehensive set of observational platforms was designed to improve the physical understanding of the effects of both ambient aerosols and seeding material on precipitation formation in southeast Queensland clouds. This focus on gaining physical understanding, along with the unique combination of modern observational platforms utilized in the program, set it apart from previous cloud seeding research programs. The overarching goals of the QCSRP were to 1) determine the characteristics of local cloud systems (i.e., weather and climate), 2) document the properties of atmospheric aerosol and their microphysical effects on precipitation formation, and 3) assess the impact of cloud seeding on cloud microphysical and dynamical processes to enhance rainfall. During the course of the program, it became clear that there is great variability in the natural cloud systems in the southeast Queensland region, and understanding that variability would be necessary before any conclusions could be made regarding the impact of cloud seeding. This article presents research highlights and progress toward achieving the goals of the program, along with the challenges associated with conducting cloud seeding research experiments

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