Climate Help

What is Climate?

Climate images show Australian Water Availability Project (AWAP) climate average and classification maps and graphs, and climate reanalysis maps. The images display monthly, seasonal and annual average maps of rainfall, maximum and minimum temperature, cloud cover and pressure, and climate zone (group and class) maps and (trend) graphs.

Climate Average is an update of the Bureau of Meteorology's Maps of average conditions using the latest (December 2016) Australian Water Availability Project (AWAP) monthly rainfall, and maximum and minimum temperature analyses (1911-2015), downloaded from the Bureau's online archive. Long term-averages (using 10, 20, 30 and 40 year averaging periods) are calculated from the monthly AWAP data. Monthly, seasonal and annual average rainfall, maximum and minimum temperature images are generated from these long-term averages to represent the past climate.

Climate Classification is an update of the Bureau of Meteorology's Climate Zones using the latest (December 2016) Australian Water Availability Project (AWAP) monthly rainfall, and maximum and minimum temperature analyses (1911-2015), downloaded from the Bureau's online archive. Long term-averages (using 10, 20, 30 and 40 year averaging periods) are calculated from the monthly AWAP data. Climate classification (group, class and trend) images, based on the Bureau's modified Koppen classification, are created from these long-term averages to represent the past climate (The distribution of climate zones across Australia: identifying and explaining changes during the past century).

What are the Climate Classification Group and Class Legends?



Climate Reanalysis is an update of the Climate Reanalyzer's Monthly Reanalysis Maps using the latest (February 2017) European Centre for Medium-Range Weather Forecasts (ECMWF) 6-hourly total cloud cover and mean sea level pressure analyses, downloaded from the ECMWF's dataserver. Averages (e.g. over the 30-year period, 1981-2010) are generated from the 6-hourly ERA-Interim data, and average data sets and images are created from the past climate.

To change the climate averaging period number of years (e.g. 10, 20, 30 or 40 years), from the Climate page, select the 10y, 20y, 30y or 40y buttons. The climate period, type and region will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

To change the climate reanalysis time (00, 06, 12, 0r 18 UTC), from the Climate page, select the 00, 06, 12, or 18 buttons. The climate period, type, region and averaging period number of years will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

To change the climate average period (e.g. 1986-2015), from the Climate page, swipe over the middle of the map horizontally to the right to move forward in time, or to the left to move backward in time. The default increment/decrement is 5 years. The climate period, type, region and averaging period number of years will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

To change the climate period (January, February, March, April, May, June, July, August, September, October, November, December, Spring, Summer, Autumn, Winter, Year), from the Climate page, select the month buttons under the map, or the season and year (annual) buttons. The climate average period, type, region and averaging period number of years will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

To change the climate type (Maximum Temperature, Minimum Temperature, Rainfall, Zones (Group), Zones (Class), Zones (Trend), Cloud Cover, Pressure), from the Climate page, swipe over the map vertically up or down, or select the Maximum Temperature, Minimum Temperature, Rainfall, Zones (Group), Zones (Class), Zones (Trend), Cloud Cover, Pressure button. The climate average period, period, region and averaging period number of years will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

To change the climate region (Australia, SE Australia, Victoria, New South Wales, Australian Capital Territory, SE Queensland, North Queensland, Northern Territory, Central Australia, NW Western Australia, SW Western Australia, South Australia, Tasmania), from the Climate page, swipe over the region name in the title of the map, or select the Australia map in the top left corner of your display or the REGION button. Select the region required from the list of choices displayed. The climate average period, period, type and averaging period number of years will remain unchanged. The meteogram location will be reset to the capital city associated with the selected region and be displayed with a rotating pin, and when selected will display the forecast meteogram.

To animate the climate images, from the Climate page, swipe over the middle of the image horizontally or select the Play/Stop Animation button on the top right of the map or select the CLIMATE Loop/Image button to start/stop the climate image animation. To scrub the timeline swipe the animation horizontally to interact with them while playing. The climate average period, type, period, region and averaging period number of years will remain unchanged. The meteogram location will be displayed with a rotating pin, and when selected will display the forecast meteogram.

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