Quantifying the intra-regional precipitation variability in northwestern China over the past 1,400 years

Harry F. LEE, Qing PEI, David D. ZHANG, Kan P. K. CHOI

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8 Citations (Scopus)

Abstract

There has been a surge of paleo-climatic/environmental studies of Northwestern China (NW China), a region characterized by a diverse assortment of hydro-climatic systems. Their common approach, however, focuses on “deducing regional resemblance” rather than “exploring regional variance.” To date, efforts to produce a quantitative assessment of long-term intra-regional precipitation variability (IRPV) in NW China has been inadequate. In the present study, we base on historical flood/drought records to compile a decadal IRPV index for NW China spanned AD580–1979 and to find its major determinants via wavelet analysis. Results show that our IRPV index captures the footprints of internal hydro-climatic disparity in NW China. In addition, we find distinct ~120–200 year periodicities in the IRPV index over the Little Ice Age, which are attributable to the change of hydro-climatic influence of ocean-atmospheric modes during the period. Also, we offer statistical evidence of El Niño Southern Oscillation (Indo-Pacific warm pool sea surface temperature and China-wide land surface temperature) as the prominent multi-decadal to centennial (centennial to multi-centennial) determinant of the IRPV in NW China. The present study contributes to the quantitative validation of the long-term IRPV in NW China and its driving forces, covering the periods with and without instrumental records. It may help to comprehend the complex hydro-climatic regimes in the region. Copyright © 2015 Lee et al.
Original languageEnglish
Article numbere0131693
JournalPLoS One
Volume10
Issue number7
DOIs
Publication statusPublished - Jul 2015

Citation

Lee, H. F., Pei, Q., Zhang, D. D., & Choi, K. P. K. (2015). Quantifying the intra-regional precipitation variability in northwestern China over the past 1,400 years. PLoS One, 10(7), e0131693. doi: 10.1371/journal.pone.0131693.

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