Latitude gradients in the natural variance in stratospheric conductivity – Implications for studies of long-term changes

Bering, Edgar A.; Benbrook, J. R.; Holzworth, R. H.; Byrne, Gregory; Gupta, S.P.

doi:10.1016/j.asr.2005.04.017

Cited by 6 publications

(3 citation statements)

References 32 publications

(69 reference statements)

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“…The ultrafine aerosol layer has a significant effect on the column resistance after the volcanic eruption. Tinsley (2005) claimed that there was an ultrafine aerosol layer in the upper stratosphere formed by ion media nucleation, as suggested by Yu and Turco(2001), which could be consistent with the unexplained variability on all time scales in measured stratospheric conductivity (Tinsley, 2005;Bering et al, 2005), especially in the descending branch of the Brewer-Dobson circulation at high latitudes. In the GEC model of the TZ06 model, the artificial ultrafine aerosol layer centered at 40 km was modeled based on the numerical simulation by Yu and Turco (2001) for an H 2 SO 4 mass concentration of 6.35 × 10 2 μg m −3 , which corresponds to a mass mixing ratio of 16 ppbm for the liquid droplets.…”

Section: Discussionsupporting

confidence: 55%

Evaluating the Response of Global Column Resistance to a Large Volcanic Eruption by an Aerosol-Coupled Chemistry Climate Model

et al. 2021

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Global electric circuits could be the key link between space weather and lower atmosphere climate. It has been suggested that the ultrafine erosol layer in the middle to upper stratosphere could greatly contribute to local column resistance and return current density. In previous work by Tinsley, Zhou, and Plemmons (Atmos. Res., 2006, 79 (3–4), 266–295), the artificial ultrafine layer was addressed and caused a significant symmetric effect on column resistance at high latitudes. In this work, we use an updated erosol coupled chemistry-climate model to establish a new global electric circuit model. The results show that the ultrafine aerosol layer exits the middle stratosphere, but due to the Brewer-Dobson circulation, there are significant seasonal variations in the ion loss due to variations in the ultrafine aerosol layer. In the winter hemisphere in the high latitude region, the column resistance will consequently be higher than that in the summer hemisphere. With an ultrafine aerosol layer in the decreasing phase of solar activity, the column resistance would be more sensitive to fluctuations in the low-energy electron precipitation (LEE) and middle-energy electron precipitation (MEE) particle fluxes.

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Section: Discussionsupporting

confidence: 55%

Evaluating the Response of Global Column Resistance to a Large Volcanic Eruption by an Aerosol-Coupled Chemistry Climate Model

et al. 2021

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“…In view of the approximations in this model in the treatment of ultrafine aerosol concentrations and stratospheric ion mobility, it seems premature to make a detailed comparison with balloon measurements of stratospheric conductivity. There is unexplained variability on all timescales in measured stratospheric conductivity [ Tinsley , 2005; Bering et al , 2005, and references therein], especially at high latitudes. The presence at balloon altitudes of small amounts of ultrafine aerosol, and especially of the day‐to‐day variability of the relativistic electron flux and its X‐ray Bremsstrahlung, which can penetrate down to the 25–30 km level [ Frahm et al , 1997]) are both potential sources of such variability.…”

Section: Discussionmentioning

confidence: 99%

Initial results of a global circuit model with variable stratospheric and tropospheric aerosols

2006

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[1] A new model of the global circuit has been constructed that treats more realistically than previous models the external influences due to varying charged particle fluxes from space, the internal variability due to the transport of radon by atmospheric dynamics, and the varying aerosol populations. An approximate treatment of the effects of explosive volcanic eruptions, that introduce SO 2 and H 2 O into the stratosphere, involves the creation of ultrafine aerosol particles in the downward branch of the Brewer-Dobson circulation from sulfuric acid aerosol particles vaporized in the upward branch. A large increase in stratospheric column resistance occurs at high latitudes, but for much of the time this column resistance is reduced by stratospheric ionizing radiation due to relativistic electron precipitation. Here we present results for the variability of the global circuit due to the variations of the aerosol populations in the stratosphere and troposphere, the variability of the cosmic ray flux, and the geographical and seasonal variability of the near-surface radioactivity. We discuss inferred changes in the circuit parameters associated with climate change, on interannual to Milankovich timescales.

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“…In view of the approximations in this model in the treatment of ultrafine aerosol concentrations and stratospheric ion mobility, it seems premature to make a detailed comparison with balloon measurements of stratospheric conductivity. There is unexplained variability on all time scales in measured stratospheric conductivity (Tinsley, 2005;Bering et al, 2005), especially at high latitudes. The presence at balloon altitudes of small amounts of ultrafine aerosol, and especially of the day-to-day variability of the relativistic electron flux and its X-ray Bremsstrahlung, which can penetrate down to the 25-30 km level Frahm et al, 1997) are both potential sources of such variability.…”

Section: Discussionmentioning

confidence: 96%

Response of a global circuit model with stratospheric aerosol to cosmic ray flux changes and its impact on the climate change

Zhou

Fang²,

Zheng³

2010

2010 18th International Conference on Geoinformatics

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A new model of the global circuit has been constructed that treats more realistically than previous models the external influences due to varying charged particle fluxes from space, the internal variability due to the transport of radon by atmospheric dynamics, and the varying aerosol populations. Here we present results for the variability of the global circuit due to the variations of the aerosol populations in the stratosphere and troposphere; the variability of the cosmic ray flux especially for little ice age period.

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Latitude gradients in the natural variance in stratospheric conductivity – Implications for studies of long-term changes

Cited by 6 publications

References 32 publications

Evaluating the Response of Global Column Resistance to a Large Volcanic Eruption by an Aerosol-Coupled Chemistry Climate Model

Evaluating the Response of Global Column Resistance to a Large Volcanic Eruption by an Aerosol-Coupled Chemistry Climate Model

Initial results of a global circuit model with variable stratospheric and tropospheric aerosols

Response of a global circuit model with stratospheric aerosol to cosmic ray flux changes and its impact on the climate change

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