Comparison of geostatistical approaches to spatially interpolate month-year rainfall for the Hawaiian Islands

Frazier, Abby G.; Giambelluca, Thomas W.; Diaz, Henry F.; Needham, Heidi L.

doi:10.1002/joc.4437

i

Comparison of geostatistical approaches to spatially interpolate month-year rainfall for the Hawaiian Islands

2016
By Frazier, Abby G. ; Giambelluca, Thomas W. ; Diaz, Henry F. ; ...

Details

Journal Title:

International Journal of Climatology
Personal Author:

Frazier, Abby G. ; Giambelluca, Thomas W. ; Diaz, Henry F. ; Needham, Heidi L.
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

The Hawaiian Islands have one of the most spatially diverse rainfall patterns on earth. Knowledge of these patterns is critical for a variety of resource management issues and, until now, only long-term mean monthly and annual rainfall maps have been available for Hawaii. In this study, month-year rainfall maps from January 1920 to December 2012 were developed for the major Hawaiian Islands. The maps were produced using climatologically aided interpolation (CAI), where the station anomalies were interpolated first, and then combined with the mean maps. A geostatistical method comparison was performed to choose the best interpolation method. The comparison focuses on three kriging algorithms: ordinary kriging (OK), ordinary cokriging (OCK), and kriging with an external drift (KED). Two covariates, elevation and mean rainfall, were tested with OCK and KED. The combinations of methods and covariates were compared using cross-validation statistics, where OK produced the lowest error statistics. Station anomalies for each month were interpolated using OK and combined with the mean monthly maps to produce the final month-year rainfall maps.
Source:

International Journal of Climatology, 36(3), 1459-1470.
DOI:

https://doi.org/10.1002/joc.4437
Document Type:

Journal Article
Funding:

Grant no. NA09OAR4310103
Compliance:

Submitted
Main Document Checksum:

urn:sha256:7ebc6817d4c61e782e4b51159fd91380fa9e8ffef84b81548462670bb5ee8286
Download URL:

https://repository.library.noaa.gov/view/noaa/14537/noaa_14537_DS1.pdf
File Type:

[PDF - 5.72 MB ]

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