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A Five-Century Reconstruction of Hawaiian Islands Winter Rainfall
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2016
Source: Journal of Climate, 29(15), 5661-5674.
[PDF-2.47 MB]
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Journal Title:Journal of Climate
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Description:Few if any high-resolution (annually resolved) paleoclimate records are available for the Hawaiian Islands prior to; similar to 1850 CE, after which some instrumental records start to become available. This paper shows how atmospheric teleconnection patterns between North America and the northeastern North Pacific (NNP) allow for reconstruction of Hawaiian Islands rainfall using remote proxy information from North America. Based on a newly available precipitation dataset for the state of Hawaii and observed and reconstructed December-February (DJF) sea level pressures (SLPs) in the North Pacific Ocean, the authors make use of a strong relationship between winter SLP variability in the northeast Pacific and corresponding DJF Hawaii rainfall variations to reconstruct and evaluate that season's rainfall over the period 1500-2012 CE. A general drying trend, though with substantial decadal and longer-term variability, is evident, particularly during the last; similar to 160 years. Hawaiian Islands rainfall exhibits strong modulation by El Nino-Southern Oscillation (ENSO), as well as in relation to Pacific decadal oscillation (PDO)-like variability. For significant periods of time, the reconstructed large-scale changes in the North Pacific SLP field described here and by construction the long-term decline in Hawaiian winter rainfall are broadly consistent with long-term changes in tropical Pacific sea surface temperature (SST) based on ENSO reconstructions documented in several other studies, particularly over the last two centuries. Also noted are some rather large multidecadal fluctuations in rainfall (and hence in NNP SLP) in the eighteenth century of undetermined provenance.
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Source:Journal of Climate, 29(15), 5661-5674.
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Rights Information:Other
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Compliance:Submitted
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Main Document Checksum:urn:sha256:e6d6c1c073b55295af3bd0b79c73460c869a67dfbbee07d32e73557e141a43ce
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