2025 Vanuatu Climate Maps - VanKIRAP

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Maps of the Past Climate of Vanuatu

1. Daily Rainfall and temperature data (1991-2020) was provided by VMGD from the homogenized data on the Pacific Climate Change Portal http://www.bom.gov.au/climate/pccsp/. This includes:

• Homogenised monthly total rainfall data for stations at Port Vila (ref

91558/VAN07002), Sola on Vanua Lava Island (ref 91551/VAN31001) and Aneityum

(ref 91568/VAN03001).

• Non-homogenised monthly total rainfall data for stations at Bauerfield on Efate Island

(ref 91557/VAN07001), Pekoa Airport on Santo Island (ref 91554/VAN25001), Lamap

on Malekula Island (ref 91555/VAN16001) and White Grass Airport (ref

91565/VAN26003).

• Homogenised monthly minimum, maximum and mean temperature data for Aneityum

(ref 91568/VAN03001).

• Non-homogenised monthly minimum, maximum and mean temperature data for Port

Vila (ref 91558/VAN07002), Sola on Vanua Lava Island (ref 91551/VAN31001), Pekoa

• Airport on Santo Island (ref 91554/VAN25001), Bauerfield on Efate Island (ref

91557/VAN07001), Lamap on Malekula Island (ref 91555/VAN16001) and White Grass

Airport (ref 91565/VAN26003).

2. Rainfall and temperature maps are presented in mm and degree Celcius.
3. Atlas of maps of the past climate of Vanuatu are presented in monthly and seasonal, showing historical long term average rainfall and temperature for Vanuatu, including ENSO phases.
4. Monthly mean rainfall and temperature statistics were derived from the daily data in (1).
5. Mapping the monthly climate statistics was undertaken by NIWA using a combination of in-house procedures, ArcGIS Pro Geoprocessing (Esri, 2023) Python scripting, ANUSPLIN (The Australian National University, 2023), and other mapping tools.
6. The Australian National University's Shuttle Radar Topography Mission (ASTER) Global Elevation Model (GDEM) Version 3 (ASTGM) elevation dataset was selected because it provided a 12 Maps of the Past Climate of Vanuatu consistent coverage across Vanuatu at an acceptable spatial resolution of 1 arc second (approximately 30-metre) and was freely available via the Vanuatu Environment Data Portal