10Be/7Be implies the contribution of stratosphere-troposphere transport to the winter-spring surface O3 variation observed on the Tibetan Plateau

Zheng, Xiaodong; Shen, Chengde; Wan, Guojiang; Liu, Kexin; Tang, Jie; Xu, Xiaobin

doi:10.1007/s11434-010-4211-3

Cited by 24 publications

(67 citation statements)

References 25 publications

(74 reference statements)

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“…Key words: Accelerator Mass Spectrometry, 7 Be, 10 Be, rainwater, atmospheric tracer PACS: 07.75.+h, 29.90+r, 92.60Xg…”

Section: Amsmentioning

confidence: 99%

“…This article describes sample preparation procedures and analytical benchmarks for 7 Be and 10 Be measurements at the Xi'an Accelerator Mass Spectrometry (Xi'an-AMS) laboratory for the study of rainwater samples. We describe a sample preparation procedure to fabricate beryllium oxide (BeO) AMS targets that includes co-precipitation, anion exchange column separation and purification.…”

mentioning

confidence: 99%

“…We describe a sample preparation procedure to fabricate beryllium oxide (BeO) AMS targets that includes co-precipitation, anion exchange column separation and purification. We then provide details for the AMS measurement of 7 Be and 10 Be following the sequence Be ratio of rainwater collected in Xi'an is shown to be about 1.3 at the time of rainfall. The virtue of the method described here is that both 7 Be and 10 Be are measured in the same sample, and is suitable for routine analysis of large numbers of rainwater samples by…”

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confidence: 99%

“…Be and 7 Be are mainly produced in the stratosphere and upper troposphere by spallation reactions by secondary cosmic ray particles (principally neutrons and protons) with nitrogen and oxygen [1].…”

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confidence: 99%

“…The half-life of 7 Be is 53.3 d, and it has been recognized as a natural tracer for atmospheric transport since the 1960s [3], and been widely used in the research of atmospheric dynamics in recent years [4][5][6][7]. 7 Be deposited on the ground is also used as a tracer in studies of soil erosion [8].…”

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confidence: 99%

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Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Zhang

2017

Chinese Phys. C

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“…Key words: Accelerator Mass Spectrometry, 7 Be, 10 Be, rainwater, atmospheric tracer PACS: 07.75.+h, 29.90+r, 92.60Xg…”

Section: Amsmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Zhang

2017

Chinese Phys. C

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Resolving the impact of stratosphere‐to‐troposphere transport on the sulfur cycle and surface ozone over the Tibetan Plateau using a cosmogenic ³⁵S tracer

Lin

Zhang

et al. 2016

JGR Atmospheres

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The Himalayas were recently identified as a global hot spot for deep stratosphere-to-troposphere transport (STT) in spring. Although the STT in this region may play a vital role in tropospheric chemistry, the hydrological cycle and aquatic ecosystems in Asia, there is no direct measurement of a chemical stratospheric tracer to verify and evaluate its possible impacts. Here we use cosmogenic 35 S as a tracer for air masses originating in the stratosphere and transported downward. We measure concentrations of 35 S in fresh surface snow and river runoff samples collected from Mount Everest in April 2013 to be more than 10 times higher than previously reported by any surface measurement, in support of the Himalayas as a gateway of springtime STT. In light of this result, measurements of 35 SO 2 and 35 SO 4 2À at Nam Co in spring 2011 are reanalyzed to investigate the magnitudes of stratospheric air masses from the Himalayas to the tropospheric sulfur cycle and surface O 3 level over the Tibetan Plateau. A simple one-box model reveals that the oxidative lifetime of SO 2 is reduced in aged STT plumes. Triple oxygen isotopic measurements of sulfate samples suggest that enhanced O 3 levels may shift the oxidation pathway of SO 2 in the troposphere, which may be constrained by further intensive sampling and measurements. Comparison with surface O 3 measurements and traditional meteorological tracing methods shows that 35 S is a potentially unique and sensitive tracer to quantify the contribution of stratospheric air to surface O 3 levels in fresh or aged STT plumes.

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A modeling assessment of the origin of Beryllium‐7 and Ozone in the Canadian Rocky Mountains

et al. 2013

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[1] This paper seeks to investigate the extent to which stratosphere-to-troposphere transport (STT) impacts the Canadian Rocky Mountain foothills. Beryllium-7 ( 7 Be) was monitored weekly at Harlech, Alberta, from July 2003 to June 2004, and daily during the spring of 2004. These data, together with hourly ozone (O 3 ) and relative humidity (RH) measurements, are presented and analyzed, with a focus on the spring of 2004. A Lagrangian dispersion model was used to help determine the origin of air parcels arriving at Harlech in order to assess if these periods were related to well-defined stratospheric intrusions. The modeling results show that events consisting of above average surface observations of 7 Be and O 3 , and below average surface observations of RH, are the result of the arrival of air originating from the middle and upper troposphere. During the spring of 2004, no direct STTs were observed; all identified events were determined to be indirect STTs or middle to upper troposphere transport that occurred several days prior to being detected at Harlech. The most significant event occurred between 2 and 11 April, which had the longest period of elevated 7 Be and O 3 observations and the lowest RH measured during the spring of 2004, and where the modeling showed a strong stratospheric input. This input can be connected with two well-defined stratospheric intrusions occurring over the northern Pacific Ocean, more than 5 days before the associated surface observations. Furthermore, the modeling shows that periods of below average 7 Be and O 3 occurred when the station was mainly influenced by air masses circulating in the boundary layer.

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10Be/7Be implies the contribution of stratosphere-troposphere transport to the winter-spring surface O3 variation observed on the Tibetan Plateau

Cited by 24 publications

References 25 publications

Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Resolving the impact of stratosphere‐to‐troposphere transport on the sulfur cycle and surface ozone over the Tibetan Plateau using a cosmogenic ³⁵S tracer

A modeling assessment of the origin of Beryllium‐7 and Ozone in the Canadian Rocky Mountains

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10Be/7Be implies the contribution of stratosphere-troposphere transport to the winter-spring surface O3 variation observed on the Tibetan Plateau

Cited by 24 publications

References 25 publications

Preliminary study of 10 Be/ 7 Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Preliminary study of 10 Be/ 7 Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Resolving the impact of stratosphere‐to‐troposphere transport on the sulfur cycle and surface ozone over the Tibetan Plateau using a cosmogenic 35S tracer

A modeling assessment of the origin of Beryllium‐7 and Ozone in the Canadian Rocky Mountains

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Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Preliminary study of ¹⁰ Be/ ⁷ Be in rainwater from Xi’an by Accelerator Mass Spectrometry

Resolving the impact of stratosphere‐to‐troposphere transport on the sulfur cycle and surface ozone over the Tibetan Plateau using a cosmogenic ³⁵S tracer