Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations
The inter-annual stable carbon isotope ratio (δ<sup>13</sup>C) of three tree-ring cores of P. euphratica (<i>Populus euphratica</i> Oliv.) was determined from Ejina Oasis in Northwest China. A robust and representative δ<sup>13</sup>C chronology is generated from...
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MDPI AG
2022-10-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/13/11/1815 |
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| author | Yanchao Wang Qiang Li Yu Liu Xiangyu Duan Changfeng Sun Huiming Song Qiufang Cai Xin Liu |
| author_facet | Yanchao Wang Qiang Li Yu Liu Xiangyu Duan Changfeng Sun Huiming Song Qiufang Cai Xin Liu |
| author_sort | Yanchao Wang |
| collection | DOAJ |
| description | The inter-annual stable carbon isotope ratio (δ<sup>13</sup>C) of three tree-ring cores of P. euphratica (<i>Populus euphratica</i> Oliv.) was determined from Ejina Oasis in Northwest China. A robust and representative δ<sup>13</sup>C chronology is generated from the three δ<sup>13</sup>C series using an arithmetic mean method. After eliminating the influence of the δ<sup>13</sup>C from elevated atmospheric carbon dioxide (CO<sub>2</sub>) concentration, we obtained a carbon isotopic discrimination (Δ<sup>13</sup>C) chronology. According to the significant correlation between the tree-ring Δ<sup>13</sup>C and instrumental data, we reconstructed the mean maximum temperature anomalies from previous December to current September (T<sub>DS</sub>) for the period 1901–2011. The reconstruction explained 43.6% of the variance over the calibration period. Three high-temperature periods (1929–1965, 1972–1974, and 1992–2006) and three low-temperature periods (1906–1926, 1966–1968, and 1975–1991) were found in the reconstructed series. Comparisons between the reconstructed T<sub>DS</sub> and the observed mean temperature from previous December to current September in Anxi meteorological station and the temperature index in north-central China demonstrated the reconstructed T<sub>DS</sub> has the advantage of reliability and stability. The significant spatial correlation declared that the reconstruction has a broad spatial representation and can represent the temperature variation characteristics in a wide geographical area. In addition, we found that the area of Ejina Oasis is smaller (larger) when the mean maximum temperature is higher (lower), which may be due to a conjunction effect of natural and anthropogenic activities. Significant periodicities and correlations suggested that the T<sub>DS</sub> variations in Ejina Oasis were regulated by solar radiation and atmospheric circulations at the interannual and interdecadal time scales. |
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| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-09T19:04:32Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-6c8f672bdaf14cf9a4313cfe74cd25132023-11-24T04:43:40ZengMDPI AGForests1999-49072022-10-011311181510.3390/f13111815Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric CirculationsYanchao Wang0Qiang Li1Yu Liu2Xiangyu Duan3Changfeng Sun4Huiming Song5Qiufang Cai6Xin Liu7Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, ChinaInstitute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, ChinaState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, ChinaInstitute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, ChinaInstitute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, ChinaInstitute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, ChinaThe inter-annual stable carbon isotope ratio (δ<sup>13</sup>C) of three tree-ring cores of P. euphratica (<i>Populus euphratica</i> Oliv.) was determined from Ejina Oasis in Northwest China. A robust and representative δ<sup>13</sup>C chronology is generated from the three δ<sup>13</sup>C series using an arithmetic mean method. After eliminating the influence of the δ<sup>13</sup>C from elevated atmospheric carbon dioxide (CO<sub>2</sub>) concentration, we obtained a carbon isotopic discrimination (Δ<sup>13</sup>C) chronology. According to the significant correlation between the tree-ring Δ<sup>13</sup>C and instrumental data, we reconstructed the mean maximum temperature anomalies from previous December to current September (T<sub>DS</sub>) for the period 1901–2011. The reconstruction explained 43.6% of the variance over the calibration period. Three high-temperature periods (1929–1965, 1972–1974, and 1992–2006) and three low-temperature periods (1906–1926, 1966–1968, and 1975–1991) were found in the reconstructed series. Comparisons between the reconstructed T<sub>DS</sub> and the observed mean temperature from previous December to current September in Anxi meteorological station and the temperature index in north-central China demonstrated the reconstructed T<sub>DS</sub> has the advantage of reliability and stability. The significant spatial correlation declared that the reconstruction has a broad spatial representation and can represent the temperature variation characteristics in a wide geographical area. In addition, we found that the area of Ejina Oasis is smaller (larger) when the mean maximum temperature is higher (lower), which may be due to a conjunction effect of natural and anthropogenic activities. Significant periodicities and correlations suggested that the T<sub>DS</sub> variations in Ejina Oasis were regulated by solar radiation and atmospheric circulations at the interannual and interdecadal time scales.https://www.mdpi.com/1999-4907/13/11/1815Ejina Oasisstable carbon isotope<i>P. euphratica</i>mean maximum temperature |
| spellingShingle | Yanchao Wang Qiang Li Yu Liu Xiangyu Duan Changfeng Sun Huiming Song Qiufang Cai Xin Liu Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations Forests Ejina Oasis stable carbon isotope <i>P. euphratica</i> mean maximum temperature |
| title | Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations |
| title_full | Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations |
| title_fullStr | Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations |
| title_full_unstemmed | Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations |
| title_short | Tree-Ring Stable Carbon Isotope-Based Mean Maximum Temperature Reconstruction in Northwest China and Its Connection with Atmospheric Circulations |
| title_sort | tree ring stable carbon isotope based mean maximum temperature reconstruction in northwest china and its connection with atmospheric circulations |
| topic | Ejina Oasis stable carbon isotope <i>P. euphratica</i> mean maximum temperature |
| url | https://www.mdpi.com/1999-4907/13/11/1815 |
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