气候变化领域集成服务门户(CCPortal): A Rossby wave breaking-induced enhancement in the tropospheric ozone over the Central Himalayan region

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DOI	10.1016/j.atmosenv.2020.117356
	A Rossby wave breaking-induced enhancement in the tropospheric ozone over the Central Himalayan region
	Kumar K.N.; Sharma S.K.; Naja M.; Phanikumar D.V.
发表日期	2020
ISSN	1352-2310
卷号	224
英文摘要	The high-altitude regions in the Himalayas are prone to high ozone concentrations frequently resulting from diverse dynamical and transport mechanisms. Here, we report an unusual enhancement in the surface and tropospheric ozone concentrations over the central Himalayan region from ground-based and space-borne measurements in the month of December 2010. The surface ozone levels (~80 ppbv) on 18–19 December 2010 is observed to be two-fold higher relative to the seasonal average (December-January-February) of about 40–50 ppbv in the central Himalayan region. The space-borne measurements from Tropospheric Emission Spectrometer and Ozone Monitoring Instrument onboard Aqua satellite also show higher values in the tropospheric column ozone over this region. The satellite observations indicate an increase in tropopause temperature of about 5 °C and decrease in tropopause altitude about 1 km during 18–19 December 2010 resulting in the occurrence of tropopause fold facilitating the stratospheric-tropospheric exchange processes over the study region. The plausible reason for the occurrence of tropopause fold and subsequent enhancement of tropospheric and surface ozone is found to be associated with the breaking Rossby waves in the upper troposphere. The wave breaking leads to the advection of high-PV (potential vorticity) air, with magnitudes of about 3–4 PVU, towards the central Himalayan region from high-latitudes. The vertical component of PV advection also shows a deep stratospheric intrusion of high-PV air into the troposphere. The isentropic transport of ozone across the folding tropopause due to the wave breaking is clearly depicted from the satellite and reanalysis datasets. Therefore, the present study has strong implications of upper tropospheric wave dynamics to the tropospheric and surface ozone over the Himalayan regions having complex topography. © 2020 Elsevier Ltd
关键词	Ozone Monitoring Instrument Potential Vorticity Rossby waves Spectrometer Tropospheric Emission Tropospheric Ozone
语种	英语
scopus关键词	Advection; Clouds; Liquid waves; Oceanography; Ozone; Satellites; Spectrometers; Topography; Ultraviolet spectrometers; Vorticity; Ozone monitoring instruments; Potential vorticity; Rossby wave; Tropospheric emissions; Tropospheric ozone; Troposphere; ozone; tropospheric ozone; unclassified drug; advection; altitude; GOME; ozone; potential vorticity; Rossby wave; satellite altimetry; tropopause; troposphere; wave breaking; advection; air quality; altitude; Article; astronomy; biogeochemistry; biogeographic region; global climate; Himalayas; priority journal; Rossby wave; topography; troposphere; Himalayas
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249277
作者单位	Physical Research Laboratory, Ahmedabad, India; Aryabhatta Research Institute of Observational Sciences, Nainital, India; Department of Science and Technology, Government of Kerala, New Delhi, India; National Centre for Medium Range Weather Forecasting, Ministry of Earth Sciences, New Delhi, India
推荐引用方式 GB/T 7714	Kumar K.N.,Sharma S.K.,Naja M.,et al. A Rossby wave breaking-induced enhancement in the tropospheric ozone over the Central Himalayan region[J],2020,224.
APA	Kumar K.N.,Sharma S.K.,Naja M.,&Phanikumar D.V..(2020).A Rossby wave breaking-induced enhancement in the tropospheric ozone over the Central Himalayan region.ATMOSPHERIC ENVIRONMENT,224.
MLA	Kumar K.N.,et al."A Rossby wave breaking-induced enhancement in the tropospheric ozone over the Central Himalayan region".ATMOSPHERIC ENVIRONMENT 224(2020).