Tree-ring based hydroclimate reconstruction over northern Vietnam from Fokienia hodginsi

Eighteenth century mega-drought and tropical Pacific influence

Masaki Sano, Brendan M. Buckley, Tatsuo Sweda

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We present here the first statistically calibrated and verified tree-ring reconstruction of climate from continental Southeast Asia. The reconstructed variable is March-May (MAM) Palmer Drought Severity Index (PDSI) based on ring widths from 22 trees (42 radial cores) of rare and long-lived conifer, Fokienia hodginsii (Po Mu as locally called) from northern Vietnam. This is the first published tree ring chronology from Vietnam as well as the first for this species. Spanning 535 years, this is the longest cross-dated tree-ring series yet produced from continental Southeast Asia. Response analysis revealed that the annual growth of Fokienia at this site was mostly governed by soil moisture in the pre-monsoon season. The reconstruction passed the calibration-verification tests commonly used in dendroclimatology, and revealed two prominent periods of drought in the mid-eighteenth and late-nineteenth centuries. The former lasted nearly 30 years and was concurrent with a similar drought over northwestern Thailand inferred from teak rings, suggesting a "mega-drought" extending across Indochina in the eighteenth century. Both of our reconstructed droughts are consistent with the periods of warm sea surface temperature (SST) anomalies in the tropical Pacific. Spatial correlation analyses with global SST indicated that ENSO-like anomalies might play a role in modulating droughts over the region, with El Niño (warm) phases resulting in reduced rainfall. However, significant correlation was also seen with SST over the Indian Ocean and the north Pacific, suggesting that ENSO is not the only factor affecting the climate of the area. Spectral analyses revealed significant peaks in the range of 53.9-78.8 years as well as in the ENSO-variability range of 2.0 to 3.2 years.

Original languageEnglish
Pages (from-to)331-340
Number of pages10
JournalClimate Dynamics
Volume33
Issue number2-3
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

eighteenth century
tree ring
drought
El Nino-Southern Oscillation
sea surface temperature
dendroclimatology
response analysis
climate
nineteenth century
temperature anomaly
coniferous tree
chronology
monsoon
soil moisture
calibration
anomaly
rainfall

Keywords

  • Dendrochronology
  • ENSO
  • Fokienia hodginsii
  • PDSI
  • Vietnam

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Tree-ring based hydroclimate reconstruction over northern Vietnam from Fokienia hodginsi : Eighteenth century mega-drought and tropical Pacific influence. / Sano, Masaki; Buckley, Brendan M.; Sweda, Tatsuo.

In: Climate Dynamics, Vol. 33, No. 2-3, 2009, p. 331-340.

Research output: Contribution to journalArticle

@article{e69c3ca5bac6424c92b9053e96c21157,
title = "Tree-ring based hydroclimate reconstruction over northern Vietnam from Fokienia hodginsi: Eighteenth century mega-drought and tropical Pacific influence",
abstract = "We present here the first statistically calibrated and verified tree-ring reconstruction of climate from continental Southeast Asia. The reconstructed variable is March-May (MAM) Palmer Drought Severity Index (PDSI) based on ring widths from 22 trees (42 radial cores) of rare and long-lived conifer, Fokienia hodginsii (Po Mu as locally called) from northern Vietnam. This is the first published tree ring chronology from Vietnam as well as the first for this species. Spanning 535 years, this is the longest cross-dated tree-ring series yet produced from continental Southeast Asia. Response analysis revealed that the annual growth of Fokienia at this site was mostly governed by soil moisture in the pre-monsoon season. The reconstruction passed the calibration-verification tests commonly used in dendroclimatology, and revealed two prominent periods of drought in the mid-eighteenth and late-nineteenth centuries. The former lasted nearly 30 years and was concurrent with a similar drought over northwestern Thailand inferred from teak rings, suggesting a {"}mega-drought{"} extending across Indochina in the eighteenth century. Both of our reconstructed droughts are consistent with the periods of warm sea surface temperature (SST) anomalies in the tropical Pacific. Spatial correlation analyses with global SST indicated that ENSO-like anomalies might play a role in modulating droughts over the region, with El Ni{\~n}o (warm) phases resulting in reduced rainfall. However, significant correlation was also seen with SST over the Indian Ocean and the north Pacific, suggesting that ENSO is not the only factor affecting the climate of the area. Spectral analyses revealed significant peaks in the range of 53.9-78.8 years as well as in the ENSO-variability range of 2.0 to 3.2 years.",
keywords = "Dendrochronology, ENSO, Fokienia hodginsii, PDSI, Vietnam",
author = "Masaki Sano and Buckley, {Brendan M.} and Tatsuo Sweda",
year = "2009",
doi = "10.1007/s00382-008-0454-y",
language = "English",
volume = "33",
pages = "331--340",
journal = "Climate Dynamics",
issn = "0930-7575",
publisher = "Springer Verlag",
number = "2-3",

}

TY - JOUR

T1 - Tree-ring based hydroclimate reconstruction over northern Vietnam from Fokienia hodginsi

T2 - Eighteenth century mega-drought and tropical Pacific influence

AU - Sano, Masaki

AU - Buckley, Brendan M.

AU - Sweda, Tatsuo

PY - 2009

Y1 - 2009

N2 - We present here the first statistically calibrated and verified tree-ring reconstruction of climate from continental Southeast Asia. The reconstructed variable is March-May (MAM) Palmer Drought Severity Index (PDSI) based on ring widths from 22 trees (42 radial cores) of rare and long-lived conifer, Fokienia hodginsii (Po Mu as locally called) from northern Vietnam. This is the first published tree ring chronology from Vietnam as well as the first for this species. Spanning 535 years, this is the longest cross-dated tree-ring series yet produced from continental Southeast Asia. Response analysis revealed that the annual growth of Fokienia at this site was mostly governed by soil moisture in the pre-monsoon season. The reconstruction passed the calibration-verification tests commonly used in dendroclimatology, and revealed two prominent periods of drought in the mid-eighteenth and late-nineteenth centuries. The former lasted nearly 30 years and was concurrent with a similar drought over northwestern Thailand inferred from teak rings, suggesting a "mega-drought" extending across Indochina in the eighteenth century. Both of our reconstructed droughts are consistent with the periods of warm sea surface temperature (SST) anomalies in the tropical Pacific. Spatial correlation analyses with global SST indicated that ENSO-like anomalies might play a role in modulating droughts over the region, with El Niño (warm) phases resulting in reduced rainfall. However, significant correlation was also seen with SST over the Indian Ocean and the north Pacific, suggesting that ENSO is not the only factor affecting the climate of the area. Spectral analyses revealed significant peaks in the range of 53.9-78.8 years as well as in the ENSO-variability range of 2.0 to 3.2 years.

AB - We present here the first statistically calibrated and verified tree-ring reconstruction of climate from continental Southeast Asia. The reconstructed variable is March-May (MAM) Palmer Drought Severity Index (PDSI) based on ring widths from 22 trees (42 radial cores) of rare and long-lived conifer, Fokienia hodginsii (Po Mu as locally called) from northern Vietnam. This is the first published tree ring chronology from Vietnam as well as the first for this species. Spanning 535 years, this is the longest cross-dated tree-ring series yet produced from continental Southeast Asia. Response analysis revealed that the annual growth of Fokienia at this site was mostly governed by soil moisture in the pre-monsoon season. The reconstruction passed the calibration-verification tests commonly used in dendroclimatology, and revealed two prominent periods of drought in the mid-eighteenth and late-nineteenth centuries. The former lasted nearly 30 years and was concurrent with a similar drought over northwestern Thailand inferred from teak rings, suggesting a "mega-drought" extending across Indochina in the eighteenth century. Both of our reconstructed droughts are consistent with the periods of warm sea surface temperature (SST) anomalies in the tropical Pacific. Spatial correlation analyses with global SST indicated that ENSO-like anomalies might play a role in modulating droughts over the region, with El Niño (warm) phases resulting in reduced rainfall. However, significant correlation was also seen with SST over the Indian Ocean and the north Pacific, suggesting that ENSO is not the only factor affecting the climate of the area. Spectral analyses revealed significant peaks in the range of 53.9-78.8 years as well as in the ENSO-variability range of 2.0 to 3.2 years.

KW - Dendrochronology

KW - ENSO

KW - Fokienia hodginsii

KW - PDSI

KW - Vietnam

UR - http://www.scopus.com/inward/record.url?scp=67649238478&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67649238478&partnerID=8YFLogxK

U2 - 10.1007/s00382-008-0454-y

DO - 10.1007/s00382-008-0454-y

M3 - Article

VL - 33

SP - 331

EP - 340

JO - Climate Dynamics

JF - Climate Dynamics

SN - 0930-7575

IS - 2-3

ER -