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Rapid climate fluctuations over the past millennium: evidence from a lacustrine record of Basomtso Lake, southeastern Tibetan Plateau.

Li K, Liu X, Herzschuh U, Wang Y - Sci Rep (2016)

Bottom Line: At the centennial time scale, the Medieval Climate Anomaly (MCA), Little Ice Age (LIA) and Current Warm Period (CWP) are distinct in the Basomtso region.These episodes with higher and lower sediment input are characterized by abrupt climate changes and short time durations.Spectral analysis indicates that the climate variations at the centennial scale on the southeastern Tibetan Plateau are influenced by solar activity during the past millennium.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.

ABSTRACT
Abrupt climate changes and fluctuations over short time scales are superimposed on long-term climate changes. Understanding rapid climate fluctuations at the decadal time scale over the past millennium will enhance our understanding of patterns of climate variability and aid in forecasting climate changes in the future. In this study, climate changes on the southeastern Tibetan Plateau over the past millennium were determined from a 4.82-m-long sediment core from Basomtso Lake. At the centennial time scale, the Medieval Climate Anomaly (MCA), Little Ice Age (LIA) and Current Warm Period (CWP) are distinct in the Basomtso region. Rapid climate fluctuations inferred from five episodes with higher sediment input and likely warmer conditions, as well as seven episodes with lower sediment input and likely colder conditions, were well preserved in our record. These episodes with higher and lower sediment input are characterized by abrupt climate changes and short time durations. Spectral analysis indicates that the climate variations at the centennial scale on the southeastern Tibetan Plateau are influenced by solar activity during the past millennium.

No MeSH data available.


Related in: MedlinePlus

Climate fluctuations in Basomtso Lake recorded by (a) LOI and (b) silt fractions and their comparisons with (c) the temperature anomaly from Nyingchi16 and (d) the temperature anomaly from the Northern Hemisphere7. Black lines in (a,b,d) are 11-yr running averages.
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f5: Climate fluctuations in Basomtso Lake recorded by (a) LOI and (b) silt fractions and their comparisons with (c) the temperature anomaly from Nyingchi16 and (d) the temperature anomaly from the Northern Hemisphere7. Black lines in (a,b,d) are 11-yr running averages.

Mentions: The Basomtso Lake record is significantly correlated with the Nyingchi mean January–June temperature anomaly inferred from tree ring data from the southeastern TP16 (Fig. 5c), suggesting that the sediment input in Basomtso Lake is related to the mean January-June temperature on the southeastern TP. The episodes with higher/lower sediment input in the Basomtso Lake record are also consistent with other climate reconstructions4956. Our reconstruction is also correlated with temperature changes in the Northern Hemisphere7 (Fig. 5d), which suggests that the variations in sediment input of the Basomtso Lake record are sensitive to global temperature variations. However, the most striking feature of our record is the detailed climate fluctuations characterized by abrupt changes and short time durations. Rapid climate fluctuations over the past several hundred years have been reported for the TP5384950, suggesting that the TP is sensitive to climate fluctuations at decadal to annual time scales. Further research is needed to confirm these rapid climate fluctuations on the TP as well as worldwide.


Rapid climate fluctuations over the past millennium: evidence from a lacustrine record of Basomtso Lake, southeastern Tibetan Plateau.

Li K, Liu X, Herzschuh U, Wang Y - Sci Rep (2016)

Climate fluctuations in Basomtso Lake recorded by (a) LOI and (b) silt fractions and their comparisons with (c) the temperature anomaly from Nyingchi16 and (d) the temperature anomaly from the Northern Hemisphere7. Black lines in (a,b,d) are 11-yr running averages.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835813&req=5

f5: Climate fluctuations in Basomtso Lake recorded by (a) LOI and (b) silt fractions and their comparisons with (c) the temperature anomaly from Nyingchi16 and (d) the temperature anomaly from the Northern Hemisphere7. Black lines in (a,b,d) are 11-yr running averages.
Mentions: The Basomtso Lake record is significantly correlated with the Nyingchi mean January–June temperature anomaly inferred from tree ring data from the southeastern TP16 (Fig. 5c), suggesting that the sediment input in Basomtso Lake is related to the mean January-June temperature on the southeastern TP. The episodes with higher/lower sediment input in the Basomtso Lake record are also consistent with other climate reconstructions4956. Our reconstruction is also correlated with temperature changes in the Northern Hemisphere7 (Fig. 5d), which suggests that the variations in sediment input of the Basomtso Lake record are sensitive to global temperature variations. However, the most striking feature of our record is the detailed climate fluctuations characterized by abrupt changes and short time durations. Rapid climate fluctuations over the past several hundred years have been reported for the TP5384950, suggesting that the TP is sensitive to climate fluctuations at decadal to annual time scales. Further research is needed to confirm these rapid climate fluctuations on the TP as well as worldwide.

Bottom Line: At the centennial time scale, the Medieval Climate Anomaly (MCA), Little Ice Age (LIA) and Current Warm Period (CWP) are distinct in the Basomtso region.These episodes with higher and lower sediment input are characterized by abrupt climate changes and short time durations.Spectral analysis indicates that the climate variations at the centennial scale on the southeastern Tibetan Plateau are influenced by solar activity during the past millennium.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.

ABSTRACT
Abrupt climate changes and fluctuations over short time scales are superimposed on long-term climate changes. Understanding rapid climate fluctuations at the decadal time scale over the past millennium will enhance our understanding of patterns of climate variability and aid in forecasting climate changes in the future. In this study, climate changes on the southeastern Tibetan Plateau over the past millennium were determined from a 4.82-m-long sediment core from Basomtso Lake. At the centennial time scale, the Medieval Climate Anomaly (MCA), Little Ice Age (LIA) and Current Warm Period (CWP) are distinct in the Basomtso region. Rapid climate fluctuations inferred from five episodes with higher sediment input and likely warmer conditions, as well as seven episodes with lower sediment input and likely colder conditions, were well preserved in our record. These episodes with higher and lower sediment input are characterized by abrupt climate changes and short time durations. Spectral analysis indicates that the climate variations at the centennial scale on the southeastern Tibetan Plateau are influenced by solar activity during the past millennium.

No MeSH data available.


Related in: MedlinePlus