Regional Scale High Resolution δ18O Prediction in Precipitation Using MODIS EVI

Wei Ping Chan, Hsiao Wei Yuan, Cho Ying Huang, Chung Ho Wang, Shou De Lin, Yi Chen Lo, Bo Wen Huang, Kent A. Hatch, Hau Jie Shiu, Cheng Feng You, Yuan Mou Chang, Sheng Feng Shen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The natural variation in stable water isotope ratio data, also known as water isoscape, is a spatiotemporal fingerprint and a powerful natural tracer that has been widely applied in disciplines as diverse as hydrology, paleoclimatology, ecology and forensic investigation. Although much effort has been devoted to developing a predictive water isoscape model, it remains a central challenge for scientists to generate high accuracy, fine scale spatiotemporal water isoscape prediction. Here we develop a novel approach of using the MODIS-EVI (the Moderate Resolution Imagining Spectroradiometer-Enhanced Vegetation Index), to predict δ18O in precipitation at the regional scale. Using a structural equation model, we show that the EVI and precipitated δ18O are highly correlated and thus the EVI is a good predictor of precipitated δ18O. We then test the predictability of our EVI-δ18O model and demonstrate that our approach can provide high accuracy with fine spatial (250×250 m) and temporal (16 days) scale δ18O predictions (annual and monthly predictabilities [r] are 0.96 and 0.80, respectively). We conclude the merging of the EVI and δ18O in precipitation can greatly extend the spatial and temporal data availability and thus enhance the applicability for both the EVI and water isoscape.

Original languageEnglish
Article numbere45496
JournalPloS one
Volume7
Issue number9
DOIs
Publication statusPublished - 2012 Sep 19

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Chan, W. P., Yuan, H. W., Huang, C. Y., Wang, C. H., Lin, S. D., Lo, Y. C., Huang, B. W., Hatch, K. A., Shiu, H. J., You, C. F., Chang, Y. M., & Shen, S. F. (2012). Regional Scale High Resolution δ18O Prediction in Precipitation Using MODIS EVI. PloS one, 7(9), [e45496]. https://doi.org/10.1371/journal.pone.0045496