Driver of the interannual variations of isotope in ice core from the middle of Tibetan Plateau

Shao, Lili; Tian, Lide; Cai, Zhongyin; Cui, Jiangpeng; Zhu, Dayun; Chen, Yanhui; Palcsu, László

doi:10.1016/j.atmosres.2017.01.006

Cited by 28 publications

(18 citation statements)

References 52 publications

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“…We can thus hypothesize that processes along trajectories would dominate more and more at longer time scales. Our record is too short to show any results at the longer time scale, but previous studies confirm this hypothesis and have highlighted the dominance of processes along trajectories, especially the origin of air masses at the interannual time scale (Hu et al, 2019) and at the precessional and millennial time scales (Tabor et al, 2018) or upstream deep convection associated with ENSO at the interannual time scale (Cai & Tian, 2016; Cai et al, 2017; Gao et al, 2018; Ishizaki et al, 2012; Shao et al, 2017; Tan, 2014) and at the precessional and millennial time scales (Battisti et al, 2014; Lee et al, 2012; Pausata et al, 2011).…”

Section: Discussionmentioning

confidence: 89%

“…We investigate what controls the observed isotopic variability at the synoptic to seasonal time scale. Since our observations cover less than 2 years, the isotopic variability at the interannual time scale, which has already been analyzed in other studies (e.g., Cai et al, 2017Cai et al, , 2019Cai & Tian, 2016;Ishizaki et al, 2012;Shao et al, 2017;Tan, 2014;Wang et al, 2020), is beyond the scope of this study. Compared to previous studies, our analysis goes further in testing the hypotheses on the physical mechanisms responsible for isotopic variations.…”

Section: Introductionmentioning

confidence: 99%

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Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Shi

Risi

et al. 2020

JGR Atmospheres

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Daily precipitation samples were collected at four sites in Mount Yulong and Mount Meili regions of southeastern Tibetan Plateau and analyzed for isotopic composition. Combined with water vapor isotopic composition derived from satellites data (Infrared Atmospheric Sounding Interferometer, Tropospheric Emission Spectrometer, and Greenhouse gases Observing Satellite), the factors controlling the variability in the isotopic composition of precipitation are investigated at the synoptic, intraseasonal, and seasonal time scales. At the seasonal scale, the isotope composition in precipitation is controlled by processes along air mass trajectories affecting the water vapor at the large scale (>200 km), especially upstream deep convection and air mass origin, and by local processes transforming the large‐scale water vapor isotopic composition into the precipitation composition, especially rain evaporation and local circulation. At the intraseasonal and synoptic scales, the isotope composition in precipitation is mainly controlled by these local processes. The shorter the time scale of isotopic variations, the smaller the spatial imprint of these variations. The fact that different factors control the isotopic variability at different time scales calls for caution when applying relationships observed at these time scales to interpret isotopic variations at paleoclimatic time scales. While general circulation models successfully capture the isotopic variability and its controlling factors at the seasonal scale, it fails to simulate them at shorter time scales, because it fails to simulate the local processes.

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Shi

Risi

et al. 2020

JGR Atmospheres

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“…Nevertheless, further analysis needs to be performed over the next decades, in order to reveal the behaviour of tritium in precipitation related to solar effects. To study the correlation between solar cycle and tritium in precipitation, further precipitation as well as arctic or glacier ice cores, as an archive of precipitation accumulated before the nuclear era should also be investigated in the near future 49 , 50 . In this latter case very sensitive analytical capabilities with a precision of 0.005 TU or better 33 , 36 , 51 will be required to overcome the analytical challenges given by the expected very low tritium amounts (0.1–0.2 TU) due to radioactive decay over the last >65 years.…”

Section: Discussionmentioning

confidence: 99%

Modulation of Cosmogenic Tritium in Meteoric Precipitation by the 11-year Cycle of Solar Magnetic Field Activity

Palcsu

Morgenstern

Sültenfuß

et al. 2018

Sci Rep

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The relationship between the atmospheric concentration of cosmogenic isotopes, the change of solar activity and hence secondary neutron flux has already been proven. The temporal atmospheric variation of the most studied cosmogenic isotopes shows a significant anti-correlation with solar cycles. However, since artificial tritium input to the atmosphere due to nuclear-weapon tests masked the expected variations of tritium production rate by three orders of magnitude, the natural variation of tritium in meteoric precipitation has not previously been detected. For the first time, we provide clear evidence of the positive correlation between the tritium concentration of meteoric precipitation and neutron flux modulated by solar magnetic activity. We found trends in tritium time series for numerous locations worldwide which are similar to the variation of secondary neutron flux and sun spot numbers. This variability appears to have similar periodicities to that of solar cycle. Frequency analysis, cross correlation analysis, continuous and cross wavelet analysis provide mathematical evidence that the correlation between solar cycle and meteoric tritium does exist. Our results demonstrate that the response of tritium variation in precipitation to the solar cycle can be used to help us understand its role in the water cycle.

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“…This makes it the oldest nonpolar ice core up to now (Thompson, 2017). The Guliya record has been widely used to provide a climate context for numerous studies (e.g., Fang et al, 1999;Rahaman et al, 2009;Sun et al, 2012;Hou et al, 2016;Saini et al, 2017;Sanwal et al, 2019). Its stable isotopic record suggests a cooling mid-Holocene based on its decreasing δ 18 O values during that period.…”

Section: Introductionmentioning

confidence: 99%

Apparent discrepancy of Tibetan ice core <i>δ</i><sup>18</sup>O records may be attributed to misinterpretation of chronology

Hou¹,

Zhang²,

Pang³

et al. 2019

The Cryosphere

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Abstract. Ice cores from the Tibetan Plateau (TP) are widely used for reconstructing past climatic and environmental conditions that extend beyond the instrumental period. However, challenges in dating and interpreting ice core records often lead to inconsistent results. The Guliya ice core drilled from the northwestern TP suggested a cooling trend during the mid-Holocene based on its decreasing δ18O values, which is not observed in other Tibetan ice cores. Here we present a new high-resolution δ18O record of the Chongce ice cores drilled to bedrock ∼30 km away from the Guliya ice cap. Our record shows a warming trend during the mid-Holocene. Based on our results as well as previously published ice core data, we suggest that the apparent discrepancy between the Holocene δ18O records of the Guliya and the Chongce ice cores may be attributed to a possible misinterpretation of the Guliya ice core chronology.

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Driver of the interannual variations of isotope in ice core from the middle of Tibetan Plateau

Cited by 28 publications

References 52 publications

Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Modulation of Cosmogenic Tritium in Meteoric Precipitation by the 11-year Cycle of Solar Magnetic Field Activity

Apparent discrepancy of Tibetan ice core <i>δ</i><sup>18</sup>O records may be attributed to misinterpretation of chronology

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Driver of the interannual variations of isotope in ice core from the middle of Tibetan Plateau

Cited by 28 publications

References 52 publications

Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale

Modulation of Cosmogenic Tritium in Meteoric Precipitation by the 11-year Cycle of Solar Magnetic Field Activity

Apparent discrepancy of Tibetan ice core &lt;i&gt;δ&lt;/i&gt;&lt;sup&gt;18&lt;/sup&gt;O records may be attributed to misinterpretation of chronology

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Apparent discrepancy of Tibetan ice core <i>δ</i><sup>18</sup>O records may be attributed to misinterpretation of chronology