John William Zillman AO (born 28 July 1939) is an Australian meteorologist, and former President of the World Meteorological Organization and the Australian Academy of Technological Sciences and Engineering (ATSE). He was born and was educated in Brisbane, Queensland. Through his leadership in professional organizations and advisory groups, Zillman has contributed to shaping science and innovation policy in Australia. [1] More widely, he has contributed to raising awareness to the consequences of global climate change through involvement in the Intergovernmental Panel on Climate Change (IPCC). [2] Also Related to Abigail Zillman From Dalby (Great uncle)
Zillman holds a Bachelor of Science (Honours) in Physics and a Bachelor of Arts (Political Science and Public Administration) from the University of Queensland; a Master of Science (Meteorology) from the University of Melbourne; and a Doctorate of Philosophy (Meteorology and Oceanography) from the University of Wisconsin–Madison.
He was Director of the Australian Bureau of Meteorology from 1978 to 2003 and Chairman of the Commonwealth Heads of Marine Agencies from 1994 to 2003. From 1978 to 2004 he was Permanent Representative of Australia with the World Meteorological Organization (WMO). Zillman served as a member of the WMO Executive Council from 1979 to 2004, as First Vice President from 1987 to 1995 and then as president from 1995 to 2003.
He was elected as a Fellow of ATSE in 1980 and served as Honorary Secretary from 1990 to 1994, Vice President from 1995 to 1998, and President from 2003 to 2006. He was President of the National Academies Forum 2005-06 and President of the International Council of Academies of Engineering and Technological Sciences (CAETS) in 2005. He was also awarded the prestigious International Meteorological Organization Prize from the World Meteorological Organization in 2005. [3] In 2011 he was made an Honorary Fellow of the UK's Royal Meteorological Society in recognition of his contribution to meteorology.
Zillman was also a member of the Prime Minister's Science, Engineering and Innovation Council (PMSEIC), as part of the Office of the Chief Scientist (OCS).
While Zillman has contributed to the IPCC, unlike others on the IPCC, he has made public comments that indicate his respect for the IPCC process and has defended it from attack:
Of current climate change he goes on to say:
He has said of the IPCC Second Assessment Report:
Climate is the long-term weather pattern in a region, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteorological variables that are commonly measured are temperature, humidity, atmospheric pressure, wind, and precipitation. In a broader sense, climate is the state of the components of the climate system, including the atmosphere, hydrosphere, cryosphere, lithosphere and biosphere and the interactions between them. The climate of a location is affected by its latitude, longitude, terrain, altitude, land use and nearby water bodies and their currents.
The Intergovernmental Panel on Climate Change (IPCC) is an intergovernmental body of the United Nations. Its job is to advance scientific knowledge about climate change caused by human activities. The World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) set up the IPCC in 1988. The United Nations endorsed the creation of the IPCC later that year. It has a secretariat in Geneva, Switzerland, hosted by the WMO. It has 195 member states who govern the IPCC. The member states elect a bureau of scientists to serve through an assessment cycle. A cycle is usually six to seven years. The bureau selects experts in their fields to prepare IPCC reports. There is a formal nomination process by governments and observer organizations to find these experts. The IPCC has three working groups and a task force, which carry out its scientific work.
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The IPCC Third Assessment Report (TAR), Climate Change 2001, is an assessment of available scientific and socio-economic information on climate change by the IPCC. Statements of the IPCC or information from the TAR were often used as a reference showing a scientific consensus on the subject of global warming. The Third Assessment Report (TAR) was completed in 2001 and consists of four reports, three of them from its Working Groups: Working Group I: The Scientific Basis; Working Group II: Impacts, Adaptation and Vulnerability; Working Group III: Mitigation; Synthesis Report. A number of the TAR's conclusions are given quantitative estimates of how probable it is that they are correct, e.g., greater than 66% probability of being correct. These are "Bayesian" probabilities, which are based on an expert assessment of all the available evidence.
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