ab0de386-01cc-43ae-9d8a-ec9116a59f3f eng utf8 dataset dataset Enquiries NIWA enquiries@niwa.co.nz pointOfContact 2021-08-12 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 2193 EPSG 7.9.4(9.0.0) Evaporation AET 1960_06 NZ NZTM Woods, R.A.; Hendrikx, J.; Henderson, R.D.; Tait, A.B. (2006). Estimating mean flow of New Zealand rivers. 2006-08-01 publication tableDigital Woods, R.A.; Hendrikx, J.; Henderson, R.D.; Tait, A.B. (2006). Estimating mean flow of New Zealand rivers. Journal of Hydrology (NZ) 45(2): 95-110. Actual evaporation is an estimated average annual value for 1960-2006. The values are calculated using AE = PE .* ( 1 + P/PE - (1+ (P/PE)^w)^(1./w) )whereAE = average annual actual evaporationPE = average annual potential evaporation (item 2 above)P = average annual precipitation (item 1 above)W = 4.35 (empirical constant value) This is a surface showing Actual evaporation, the units are mm/year. Area: NZ. Projection: NZTM (New Zealand Transverse Mercator) NIWA, The reference for this method is: Woods, R.A.; Hendrikx, J.; Henderson, R.D.; Tait, A.B. (2006). Estimating mean flow of New Zealand rivers. Journal of Hydrology (NZ) 45(2): 95-110. Downloadable Data Evaporation actual NZ grid eng utf8 climatologyMeteorologyAtmosphere environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 true -180 180 -42.431194 -27.112196 SDE Raster Dataset 10.1