Climate Change Data Portal
DOI | 10.5194/acp-22-13035-2022 |
Dynamics of ENSO-driven stratosphere-to-troposphere transport of ozone over North America | |
Albers, John R.; Butler, Amy H.; Langford, Andrew O.; Elsbury, Dillon; Breeden, Melissa L. | |
发表日期 | 2022 |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
起始页码 | 13035 |
结束页码 | 13048 |
卷号 | 22期号:19页码:14 |
英文摘要 | The El Nino-Southern Oscillation (ENSO) is known to modulate the strength and frequency of stratosphere-to-troposphere transport (STT) of ozone over the Pacific-North American region during late winter to early summer. Dynamical processes that have been proposed to account for this variability include variations in the amount of ozone in the lowermost stratosphere that is available for STT and tropospheric circulation-related variations in the frequency and geographic distribution of individual STT events. Here we use a large ensemble of Whole Atmosphere Community Climate Model (WACCM) simulations (forced by sea-surface temperature (SST) boundary conditions consistent with each phase of ENSO) to show that variability in lower-stratospheric ozone and shifts in the Pacific tropospheric jet constructively contribute to the amount of STT of ozone in the North American region during both ENSO phases. In terms of stratospheric variability, ENSO drives ozone anomalies resembling the Pacific-North American teleconnection pattern that span much of the lower stratosphere below 50 hPa. These ozone anomalies, which dominate over other ENSO-driven changes in the Brewer-Dobson circulation (including changes due to both the stratospheric residual circulation and quasi-isentropic mixing), strongly modulate the amount of ozone available for STT transport. As a result, during late winter (February-March), the stratospheric ozone response to the teleconnections constructively reinforces anomalous ENSO-jet-driven STT of ozone. However, as ENSO forcing weakens as spring progresses into summer (April-June), the direct effects of the ENSO-jet-driven STT transport weaken. Nevertheless, the residual impacts of the teleconnections on the amount of ozone in the lower stratosphere persist, and these anomalies in turn continue to cause anomalous STT of ozone. These results should prove helpful for interpreting the utility of ENSO as a subseasonal predictor of both free-tropospheric ozone and the probability of stratospheric ozone intrusion events that may cause exceedances in surface air quality standards. |
学科领域 | Environmental Sciences; Meteorology & Atmospheric Sciences |
语种 | 英语 |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
WOS记录号 | WOS:000865761700001 |
来源期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/273454 |
作者单位 | University of Colorado System; University of Colorado Boulder; National Oceanic Atmospheric Admin (NOAA) - USA; National Oceanic Atmospheric Admin (NOAA) - USA |
推荐引用方式 GB/T 7714 | Albers, John R.,Butler, Amy H.,Langford, Andrew O.,et al. Dynamics of ENSO-driven stratosphere-to-troposphere transport of ozone over North America[J],2022,22(19):14. |
APA | Albers, John R.,Butler, Amy H.,Langford, Andrew O.,Elsbury, Dillon,&Breeden, Melissa L..(2022).Dynamics of ENSO-driven stratosphere-to-troposphere transport of ozone over North America.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),14. |
MLA | Albers, John R.,et al."Dynamics of ENSO-driven stratosphere-to-troposphere transport of ozone over North America".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):14. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。