Rainfall variability and vegetation recovery in rocky desertification areas recorded in recently-deposited stalagmites from Guilin, South China

Jian Jun Yin, Hong Chun Li, Wei Tang, Zhijun Wang, Horng Sheng Mii, Yushi Lin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

An actively growing stalagmite (sample DY-2) from Maomaotou Big Cave in Guilin, south China was dated using a combined approach of 230 Th/U, 210 Pb and AMS 14 C dating techniques. The post-bomb 14 C curve shows that the DY-2 was deposited during 1964–2009 CE and a fast growth rate of ∼2.25 mm/a was determined for this 9.3 cm-long stalagmite. The 210 Pb dating of the top 7 mm part of another stalagmite sample PL4 from Panlong Cave located in the same area as the Maomaotou Big Cave constrained a depositional interval during 1830–2009 CE with a much slower growth rate of ∼0.04 mm/a. The δ 18 O variations of DY-2 and PL4 are highly comparable on decadal time-scales within age uncertainties, and both reveal a good coherence with local instrumental rainfall and historic dry-wet index records. These two δ 18 O records suggest that rainfall variability in the region of Guilin is modulated by Pacific Decadal Oscillation (PDO) and El Niño-Southern Oscillation (ENSO), as the latter can affect the East Asian Summer Monsoon (EASM) and Western Pacific Subtropical High (WPSH). On annual-to-decadal scales, the increase of EASM intensity and WPSH as well as the shift of negative (cold) PDO and La Niña phases would enhance the summer rainfall in the Guilin region, as revealed by the lower stalagmite δ 18 O values. While weakening EASM and WPSH with positive (warm) PDO and El Niño phases tend to lead to a dry climate in this region of south China. In addition, the stalagmite δ 13 C and Dead Carbon Proportion (DCP) records show gradually decreasing trends over the last several decades. According to the findings of synchronous increase in both soil pCO 2 and dissolved inorganic carbon (DIC) concentrations in seepage waters from the area of Guilin, the variation of stalagmite δ 13 C and DCP may reflect a history of vegetation recovery in such a rocky desertification area like Guilin, where the area of rocky desertification has been reducing since the 1990s due to afforestation policies and measures.

Original languageEnglish
Pages (from-to)109-119
Number of pages11
JournalQuaternary International
Volume528
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

desertification
Caves
stalagmite
vegetation
caves
summer
Rain
oscillation
monsoons
China
Carbon
recovery
rain
Recovery
rainfall
Pacific Decadal Oscillation
dating
oscillations
cave
carbon

Keywords

  • Guilin
  • Rocky desertification
  • South China
  • Stalagmites
  • Summer monsoon rainfall
  • δ C and DCP
  • δ O

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Rainfall variability and vegetation recovery in rocky desertification areas recorded in recently-deposited stalagmites from Guilin, South China. / Yin, Jian Jun; Li, Hong Chun; Tang, Wei; Wang, Zhijun; Mii, Horng Sheng; Lin, Yushi.

In: Quaternary International, Vol. 528, 01.01.2019, p. 109-119.

Research output: Contribution to journalArticle

@article{b58d5c463cff43449ed5b75022e20f17,
title = "Rainfall variability and vegetation recovery in rocky desertification areas recorded in recently-deposited stalagmites from Guilin, South China",
abstract = "An actively growing stalagmite (sample DY-2) from Maomaotou Big Cave in Guilin, south China was dated using a combined approach of 230 Th/U, 210 Pb and AMS 14 C dating techniques. The post-bomb 14 C curve shows that the DY-2 was deposited during 1964–2009 CE and a fast growth rate of ∼2.25 mm/a was determined for this 9.3 cm-long stalagmite. The 210 Pb dating of the top 7 mm part of another stalagmite sample PL4 from Panlong Cave located in the same area as the Maomaotou Big Cave constrained a depositional interval during 1830–2009 CE with a much slower growth rate of ∼0.04 mm/a. The δ 18 O variations of DY-2 and PL4 are highly comparable on decadal time-scales within age uncertainties, and both reveal a good coherence with local instrumental rainfall and historic dry-wet index records. These two δ 18 O records suggest that rainfall variability in the region of Guilin is modulated by Pacific Decadal Oscillation (PDO) and El Ni{\~n}o-Southern Oscillation (ENSO), as the latter can affect the East Asian Summer Monsoon (EASM) and Western Pacific Subtropical High (WPSH). On annual-to-decadal scales, the increase of EASM intensity and WPSH as well as the shift of negative (cold) PDO and La Ni{\~n}a phases would enhance the summer rainfall in the Guilin region, as revealed by the lower stalagmite δ 18 O values. While weakening EASM and WPSH with positive (warm) PDO and El Ni{\~n}o phases tend to lead to a dry climate in this region of south China. In addition, the stalagmite δ 13 C and Dead Carbon Proportion (DCP) records show gradually decreasing trends over the last several decades. According to the findings of synchronous increase in both soil pCO 2 and dissolved inorganic carbon (DIC) concentrations in seepage waters from the area of Guilin, the variation of stalagmite δ 13 C and DCP may reflect a history of vegetation recovery in such a rocky desertification area like Guilin, where the area of rocky desertification has been reducing since the 1990s due to afforestation policies and measures.",
keywords = "Guilin, Rocky desertification, South China, Stalagmites, Summer monsoon rainfall, δ C and DCP, δ O",
author = "Yin, {Jian Jun} and Li, {Hong Chun} and Wei Tang and Zhijun Wang and Mii, {Horng Sheng} and Yushi Lin",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.quaint.2019.01.039",
language = "English",
volume = "528",
pages = "109--119",
journal = "Quaternary International",
issn = "1040-6182",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Rainfall variability and vegetation recovery in rocky desertification areas recorded in recently-deposited stalagmites from Guilin, South China

AU - Yin, Jian Jun

AU - Li, Hong Chun

AU - Tang, Wei

AU - Wang, Zhijun

AU - Mii, Horng Sheng

AU - Lin, Yushi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - An actively growing stalagmite (sample DY-2) from Maomaotou Big Cave in Guilin, south China was dated using a combined approach of 230 Th/U, 210 Pb and AMS 14 C dating techniques. The post-bomb 14 C curve shows that the DY-2 was deposited during 1964–2009 CE and a fast growth rate of ∼2.25 mm/a was determined for this 9.3 cm-long stalagmite. The 210 Pb dating of the top 7 mm part of another stalagmite sample PL4 from Panlong Cave located in the same area as the Maomaotou Big Cave constrained a depositional interval during 1830–2009 CE with a much slower growth rate of ∼0.04 mm/a. The δ 18 O variations of DY-2 and PL4 are highly comparable on decadal time-scales within age uncertainties, and both reveal a good coherence with local instrumental rainfall and historic dry-wet index records. These two δ 18 O records suggest that rainfall variability in the region of Guilin is modulated by Pacific Decadal Oscillation (PDO) and El Niño-Southern Oscillation (ENSO), as the latter can affect the East Asian Summer Monsoon (EASM) and Western Pacific Subtropical High (WPSH). On annual-to-decadal scales, the increase of EASM intensity and WPSH as well as the shift of negative (cold) PDO and La Niña phases would enhance the summer rainfall in the Guilin region, as revealed by the lower stalagmite δ 18 O values. While weakening EASM and WPSH with positive (warm) PDO and El Niño phases tend to lead to a dry climate in this region of south China. In addition, the stalagmite δ 13 C and Dead Carbon Proportion (DCP) records show gradually decreasing trends over the last several decades. According to the findings of synchronous increase in both soil pCO 2 and dissolved inorganic carbon (DIC) concentrations in seepage waters from the area of Guilin, the variation of stalagmite δ 13 C and DCP may reflect a history of vegetation recovery in such a rocky desertification area like Guilin, where the area of rocky desertification has been reducing since the 1990s due to afforestation policies and measures.

AB - An actively growing stalagmite (sample DY-2) from Maomaotou Big Cave in Guilin, south China was dated using a combined approach of 230 Th/U, 210 Pb and AMS 14 C dating techniques. The post-bomb 14 C curve shows that the DY-2 was deposited during 1964–2009 CE and a fast growth rate of ∼2.25 mm/a was determined for this 9.3 cm-long stalagmite. The 210 Pb dating of the top 7 mm part of another stalagmite sample PL4 from Panlong Cave located in the same area as the Maomaotou Big Cave constrained a depositional interval during 1830–2009 CE with a much slower growth rate of ∼0.04 mm/a. The δ 18 O variations of DY-2 and PL4 are highly comparable on decadal time-scales within age uncertainties, and both reveal a good coherence with local instrumental rainfall and historic dry-wet index records. These two δ 18 O records suggest that rainfall variability in the region of Guilin is modulated by Pacific Decadal Oscillation (PDO) and El Niño-Southern Oscillation (ENSO), as the latter can affect the East Asian Summer Monsoon (EASM) and Western Pacific Subtropical High (WPSH). On annual-to-decadal scales, the increase of EASM intensity and WPSH as well as the shift of negative (cold) PDO and La Niña phases would enhance the summer rainfall in the Guilin region, as revealed by the lower stalagmite δ 18 O values. While weakening EASM and WPSH with positive (warm) PDO and El Niño phases tend to lead to a dry climate in this region of south China. In addition, the stalagmite δ 13 C and Dead Carbon Proportion (DCP) records show gradually decreasing trends over the last several decades. According to the findings of synchronous increase in both soil pCO 2 and dissolved inorganic carbon (DIC) concentrations in seepage waters from the area of Guilin, the variation of stalagmite δ 13 C and DCP may reflect a history of vegetation recovery in such a rocky desertification area like Guilin, where the area of rocky desertification has been reducing since the 1990s due to afforestation policies and measures.

KW - Guilin

KW - Rocky desertification

KW - South China

KW - Stalagmites

KW - Summer monsoon rainfall

KW - δ C and DCP

KW - δ O

UR - http://www.scopus.com/inward/record.url?scp=85060955483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060955483&partnerID=8YFLogxK

U2 - 10.1016/j.quaint.2019.01.039

DO - 10.1016/j.quaint.2019.01.039

M3 - Article

AN - SCOPUS:85060955483

VL - 528

SP - 109

EP - 119

JO - Quaternary International

JF - Quaternary International

SN - 1040-6182

ER -