Bureau of Meteorology, Department of the Environment and Heritage ( Australia )
The following 11 out of 15 criteria
|1.||Serve as a robust indicator of environmental change|
|2.||Reflect a fundamental or highly-valued aspect of the environment or an important environmental issue|
|3.||Be either national in scope or applicable to regional environmental issues of national significance|
|4.||Provide an early warning of potential problems|
|5.||Be capable of being monitored to provide statistically verifiable and reproducible data that shows trends over time and, preferably, apply to a broad range of environmental regions|
|6.||Be scientifically credible|
|7.||Be easy to understand|
|11.||Contribute to monitoring of progress towards implementing commitments in nationally important environmental policies|
|13.||Contribute to the fulfillment of reporting obligations under international agreements|
|15.||Where possible and appropriate, be consistent and comparable with other countries� and state and territory indicators|
Temporal range of the available data, as described by the metadata record, is from 01-Apr-4848 .
To view or download any of the data, you must be logged in
'This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SOE_low_strato when using these data.'
'Data arising from this project are available from the state of the environment indicator URL given below.'
The annual cycle can be clearly seen in the plots of monthly mean lower stratospheric temperature, though the range is smaller for Macquarie Island than for the Antarctic sites. This cycle makes it hard to see long-term trends but can be removed by using monthly anomalies, which show the difference between the value for a given month and the long-term mean value for that month. This process also helps to remove any biases that may result from missing data.
The anomaly data indicate significant cooling at all sites, especially the Antarctic sites where the temperature appears to have decreased by about 3 degrees in 40 years.
It should be noted that the data have not been corrected for any changes in instrumentation or observing practices.
Over the whole period of record there has been a significant cooling at all sites, especially the Antarctic sites where the temperature appears to have decreased by about 3 degrees. However, temperatures have steadied over recent years at Antarctic sites, with a slight warming at Macquarie Island.
Of interest for the Antarctic sites are the cold spike of late 2001 and the relatively warm spike of early 2003.
For definitions of the Scale categories, consult the Explanation of the Status Categories
|Project 805 - Meteorology Observations|
|Scientific Bibliography 17309 - French, J., Burns, G., Greet, P. & French, K. (2000) Antarctic Noctilucent Clouds: The Upper atmosphere Exposed to View. The Physicist, volume 37, Number 3|
|SOE Indicator 1 - Monthly mean air temperatures at Australian Antarctic Stations|
|SOE Indicator 2 - Highest monthly air temperatures at Australian Antarctic Stations|
|SOE Indicator 3 - Lowest monthly air temperatures at Australian Antarctic Stations|
|SOE Indicator 5 - Monthly mean mid-tropospheric temperatures above Australian Antarctic Stations|
|SOE Indicator 6 - Daily mean 10m Firn Temperatures at AWS sites in the AAT (deg C)|
|SOE Indicator 8 - Monthly mean atmospheric pressure at Australian Antarctic Stations|
|SOE Indicator 11 - Atmospheric concentrations of greenhouse gas species|
|SOE Indicator 12 - Noctilucent cloud observations at Davis|
|SOE Indicator 13 - Polar stratospheric cloud observations at Davis|
|SOE Indicator 14 - Midwinter atmospheric temperature at altitude 87km|
|SOE Indicator 16 - Extent of summer surface glacial melt (sq km)|
|SOE Indicator 42 - Antarctic sea ice extent and area|
|SOE Indicator 56 - Monthly fuel usage of the generator sets and boilers|
|SOE Indicator 59 - Monthly electricity usage at Australian Antarctic Stations|
|SOE Indicator 76 - Monthly fuel usage of ships travelling to Australian Antarctic Stations|
The properties link can be used to view details of the parameters measured for this indicator.
|Parameter Name||Unit of measure||Properties|
|Air Temperature||deg C||Properties|
|Air Temperature Anomaly||deg C||Properties|
The following parameters and/or sensor notes are from the metadata record.
Citation reference for this metadata record and dataset
Download page for Australian Antarctic Data Centre