Climate Victoria: 9am Vapour Pressure (9 second, approx. 250 m)

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About this Collection

Climate Victoria: 9am Vapour Pressure (9 second, approx. 250 m)

Daily (1981-2019), monthly (1981-2019) and monthly mean (1981-2010) surfaces of 9am vapour pressure across Victoria at a spatial resolution of 9 seconds (approx. 250 m).

Climatology (excl. Climate Change Processes)

01 Jan 1981

31 Dec 2019

Stephen Stewart

climate weather daily monthly climate normals vapour pressure humidity interpolation victoria


Vapour pressure climate normals (1981-2010) published in: Fedrigo, M. Stewart, S.B. Roxburgh, S.H. Kasel, S. Bennett, L.T. Vickers, H. Nitschke, C.R. 2019. Predictive Ecosystem Mapping of South-Eastern Australian Temperate Forests Using Lidar-Derived Structural Profiles and Species Distribution Models. Remote Sens. 11, 93.


A) Data modelling: 1. Weather station observations collected by the Australian Bureau of Meteorology were obtained via the SILO patched point dataset (, followed by the removal of all interpolated records. 2. Climate normals representing the 1981-2010 reference period were calculated for each weather station. A regression patching procedure (Hopkinson et al. 2012) was used to correct for biases arising due to differences in record length where possible. 3. Climate normals for each month were interpolated using trivariate splines (latitude, longitude and elevation as spline variables). All data was interpolated using ANUSPLIN 4.4 (Hutchinson & Xu 2013). 4. Daily anomalies were calculated by subtracting daily observations from climate normals and interpolated with full spline dependence upon latitude and longitude. 5. Interpolated anomalies were added to interpolated climate normals to obtain the final daily surfaces. 6. Monthly surfaces are calculated as an aggregation of the daily product. B) Spatial data inputs: 1. Fenner School of Environment and Society and Geoscience Australia. 2008. GEODATA 9 Second Digital Elevation Model (DEM-9S) Version 3. C) Model performance: Accuracy assessment was conducted with leave-one-out cross validation. Mean monthly vapour pressure: RMSE = 0.38 hPA Daily vapour pressure: RMSE = 1.24 hPa

The research was supported by the Melbourne Research Scholarship (University of Melbourne) with additional funding provided by the State of Victoria Department of Environment, Land, Water and Planning (DELWP) through the Integrated Forest Ecosystem Research (iFER) program.

Creative Commons Attribution 4.0 International Licence

CSIRO (Australia), The University of Melbourne (Australia)

Stewart, Stephen; Fedrigo, Melissa; Roxburgh, Stephen; Kasel, Sabine; Nitschke, Craig (2020): Climate Victoria: 9am Vapour Pressure (9 second, approx. 250 m). v5. CSIRO. Data Collection.

All Rights (including copyright) CSIRO, The University of Melbourne 2020.

The metadata and files (if any) are available to the public.

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Location Details

33°58′48″ S

39°9′36″ S

149°58′39″ E

140°57′36″ E


About this Project


Stephen Stewart

Melissa Fedrigo

Stephen Roxburgh

Sabine Kasel

Craig Nitschke

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