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| Titel |
Post-Pliocene establishment of the present monsoonal climate in SW China: evidence from the late Pliocene Longmen megaflora |
| VerfasserIn |
T. Su, F. M. B. Jacques, R. A. Spicer, Y.-S. Liu, Y.-J. Huang, Y.-W. Xing, Z.-K. Zhou |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 4 ; Nr. 9, no. 4 (2013-08-14), S.1911-1920 |
| Datensatznummer |
250085204
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| Publikation (Nr.) |
 copernicus.org/cp-9-1911-2013.pdf |
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| Zusammenfassung |
| The paleoclimate of the late Pliocene Longmen flora from Yongping County
located at the southeastern boundary of the Qinghai-Tibet Plateau was
reconstructed using two leaf-physiognomy-based methods, i.e., leaf margin
analysis (LMA) and Climate Leaf Analysis Multivariate Program (CLAMP), to
understand the paleoclimate condition and geographical pattern of monsoonal
climate in southwestern China during the late Pliocene. The mean annual
temperatures (MATs) estimated by LMA and CLAMP are 17.4 ± 3.3 °C
and 17.4 ± 1.3 °C, respectively, compared
with 15.9 °C at present. Meanwhile, the growing season
precipitation (GSP) estimated by CLAMP is 1735.5 ± 217.7 mm in the
Longmen flora, compared with 986.9 mm nowadays. The calculated monsoon intensity index
(MSI) of the Longmen flora is significantly lower than that of today. These
results appear consistent with previous studies on the late Pliocene floras
in western Yunnan based on the coexistence approach (CA), and further
suggest that there was a slightly warmer and much wetter climate during the
late Pliocene than the present climate in western Yunnan. We conclude that
the significant change of the monsoonal climate might have been resulted
from the continuous uplift of mountains in western Yunnan, as well as the
intensification of the eastern Asian winter monsoon, both occurring concurrently
in the post-Pliocene period. |
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