Tree ring width‐based January–March mean minimum temperature reconstruction from Larix gmelinii in the Greater Khingan Mountains, China since AD 1765

2020 ◽  
Author(s):  
Yangao Jiang ◽  
Chuan Liu ◽  
Junhui Zhang ◽  
Shijie Han ◽  
Cassius E. O. Coombs ◽  
...  
Keyword(s):  
Tree Ring ◽  
Minimum Temperature ◽  
Ring Width ◽  
Temperature Reconstruction ◽  
Larix Gmelinii ◽  
Tree Ring Width

scholarly journals Tree-Ring-Based Summer Temperature Minimum Reconstruction for Taboshar, Sogd Province, Tajikistan, Since AD 1840: Linkages to the Oceans

2018 ◽  
Author(s):  
Zulfiyor Bakhtiyorov ◽  
Ruide Yu ◽  
Akylai Monoldorova ◽  
Zhijie Ta ◽  
Javhar Aminov
Keyword(s):  
Tree Ring ◽  
Minimum Temperature ◽  
Ring Width ◽  
Temperature Reconstruction ◽  
Forest Tree ◽  
Summer Temperature ◽  
Northwestern Part ◽  
Ocean Climate ◽  
High Asia ◽  
Ecological Importance

Despite the ecological importance of forest tree species, our study was motivated by scarce data on dendrochronology studies limited to the northwestern part of Tajikistan due to lack of access to such a part of the country which is difficult to access. Current studies on Junipers in the northwestern part of Tajikistan identified that tree ring-based climate reconstruction is possible. Cores of Juniperus Turkestanica from Taboshar area, Sogd province were developed into 176-year tree-ring width chronology. In the current study a summer (June-September) minimum temperature reconstruction spanning AD 1840–2016 was developed, which can explain 30.0% of the instrumental variableness for the period of 1940–2015. Five warmest (1856–1866, 1869–1871, 1907–1916, 1923–1935, 1988–2016) and four coldest time periods (1840–1855, 1872–1906, 1917–1922, 1940–1984) were identified. The developed reconstruction coincides with cold and warm periods with prior investigations from tree-rings in China, Mongolia, Kyrgyzstan, Kazakhstan and Tajikistan. Spatial correlation analysis with the gridded minimum temperature data shows that the temperature reconstruction covers geographical representation over High Asia. Significant correlation was found between temperature reconstruction with summer SST, which suggests strong linkages of regional temperature variability with Indian-Ocean climate system. The obtained spectral peaks from the spectral analysis of the summer temperature reconstruction were significantly at 84.7-year (90%), 2.9-year (99%), 2.6-year (99%), 2.5-year (99%), 2.4-year (99%) and 2.2-year (99%).

scholarly journals Long term January–March and May–August temperature reconstructions from tree-ring records from Bosnia and Herzegovina

2012 ◽  
Vol 8 (5) ◽  
pp. 4401-4442 ◽  
Author(s):  
S. Poljanšek ◽  
A. Ceglar ◽  
T. Levanič
Keyword(s):  
Tree Ring ◽  
Bosnia And Herzegovina ◽  
Ring Width ◽  
Temperature Reconstruction ◽  
Balkan Peninsula ◽  
Negative Influence ◽  
Tree Ring Width ◽  
Historical Sources ◽  
Climate Signal ◽  
Width Measurements

Abstract. We present the first spring and summer temperature reconstruction for the north-western part of the Balkan Peninsula. The reconstruction is based on tree-ring width measurements from 7 representative black pine (Pinus nigra Arnold) sites in Bosnia and Herzegovina (BiH). We found a significant, positive influence of above-average January–March temperatures on 4 sites (Blace, Peručica, Šator, Konjuh) and a negative influence of above-average May–August temperatures and a positive relationship with an above-average sum of May–August precipitation on tree-ring width formation from 3 sites (Krivaja, Prusac, Šipovo). A 31-yr running correlation between temperature and precipitation of the May–August period and tree-ring indices gave a stable relationship between 1901 and the 1960s, after which values of correlation coefficients decrease to the level of significance. A change in summer cyclones in the central part of the Adriatic Sea is presented as a possible cause of the divergence with the climate signal. In the period of calibration and verification of the linear model for the group of 3 sites (Krivaja, Prusac, Šipovo), the best relationship was found between tree-ring indices and mean May–August temperatures of the current year. For the group of 4 sites (Blace, Peručica, Šator, Konjuh), the relationship between tree-ring indices and mean January–March temperatures of the current year is the strongest. The developed models were used for reconstruction of May–August temperatures for BiH for the period 1701–1901 and January–March temperatures for the period 1685–1901. Using the method of percentiles (85th and 15th) we identified extreme hot/cool summers and warm/cold springs and compared them to available documentary historical sources and other reconstructions from the broader region.

scholarly journals Tree-ring reconstruction of seasonal mean minimum temperature at Mt. Yaoshan, China, since 1873 and its relevance to 20th-century warming

2014 ◽  
Vol 10 (2) ◽  
pp. 859-894 ◽  
Author(s):  
Y. Liu ◽  
Y. Zhang ◽  
H. Song ◽  
Y. Ma ◽  
Q. Cai ◽  
...  
Keyword(s):  
Spatial Correlation ◽  
20Th Century ◽  
Tree Ring ◽  
Minimum Temperature ◽  
Current Knowledge ◽  
Southern Oscillation ◽  
Ring Width ◽  
Temperature Reconstruction ◽  
Grid Data ◽  
Central Plains

Abstract. It is very important to comprehend the climate variations in the vast regions of Central Plains of China. Current knowledge about climate changes of the past few hundred years in this region is primarily based on historical documents, and lack of evidences from the natural archives. However, these documents had somewhat artificially effects caused by the recorders, and not sufficient to fully understand natural climatic changes. In this paper, based on a significant correlation between the tree-ring width of Chinese Pine and observed instrumental data in the Mt. Yaoshan, China, we formulated a transfer function to reconstruct the mean minimum temperature (MMinT) from the previous December to the current June (Tmin_DJ) for the period 1873–2011. The reconstruction explained 39.8% of the instrumental variance during the calibration period of 1958–2011. High Tmin_DJ intervals with values greater than the 139 year average occurred in 1932–1965 and 1976–2006. The intervals 1878–1894 and 1906–1931 experienced a Tmin_DJ lower than the 139 year average. The ten highest Tmin_DJ years occurred after the 1950s, especially after 1996. A distinct upward trend in the Tmin_DJ series beginning in the 1910s was apparent, and the highest value occurred around 2000. The 20th-century warming signal was captured well by the Yaoshan Tmin_DJ temperature reconstruction, indicating that the temperature rise in the sensitive Central Plains of China region reflected the global temperature change. The Tmin_DJ reconstruction also matched several other temperature series in China with similar warm-cold patterns. The distinct spatial correlation between both observed and reconstructed series and CRU TS3.10 grid data indicates that our results may represent Tmin_DJ changes on a larger scale. The spatial correlation with sea surface temperature (SST) indicated that observed and reconstructed Tmin_DJ temperatures in the Mt. Yaoshan are closely linked to the West Pacific, Indian and North Atlantic Oceans as well as El Niño-Southern Oscillation (ENSO).

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