气候变化领域集成服务门户(CCPortal): The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: Microphysical properties derived from aircraft-borne in situ measurements

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DOI	10.5194/acp-21-15259-2021
	The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: Microphysical properties derived from aircraft-borne in situ measurements
	Mahnke C.; Weigel R.; Cairo F.; Vernier J.-P.; Afchine A.; Krämer M.; Mitev V.; Matthey R.; Viciani S.; D'Amato F.; Ploeger F.; Deshler T.; Borrmann S.
发表日期	2021
ISSN	1680-7316
起始页码	15259
结束页码	15282
卷号	21 期号:19
英文摘要	The Asian summer monsoon is an effective pathway for aerosol particles and precursors from the planetary boundary layer over Central, South, and East Asia into the upper troposphere and lower stratosphere. An enhancement of aerosol particles within the Asian monsoon anticyclone (AMA), called the Asian tropopause aerosol layer (ATAL), has been observed by satellites. We discuss airborne in situ and remote sensing observations of aerosol microphysical properties conducted during the 2017 StratoClim field campaign within the AMA region. The aerosol particle measurements aboard the high-altitude research aircraft M55 Geophysica (maximum altitude reached of ∼20.5km) were conducted with a modified ultra-high-sensitivity aerosol spectrometer-airborne (UHSAS-A; particle diameter detection range of 65nm to 1μm), the COndensation PArticle counting System (COPAS, detecting total concentrations of submicrometer-sized particles), and the New Ice eXpEriment-Cloud and Aerosol Spectrometer with Detection of POLarization (NIXE-CAS-DPOL). In the COPAS and UHSAS-A vertical particle mixing ratio (PMR) profiles and the size distribution profiles (for number, surface area, and volume concentration), the ATAL is evident as a distinct layer between ∼370 and 420K potential temperature. Within the ATAL, the maximum detected PMRs (from the median profiles) were ∼700mg-1 for particle diameters between 65nm and 1μm (UHSAS-A) and higher than 2500mg-1 for diameters larger than 10nm (COPAS). These values are up to 2 times higher than those previously found at similar altitudes in other tropical locations. The difference between the PMR profiles measured by the UHSAS-A and the COPAS indicate that the region below the ATAL at levels from 350 to 370K is influenced by the nucleation of aerosol particles (diameter <65nm). We provide detailed analyses of the vertical distribution of the aerosol particle size distributions and the PMR and compare these with previous tropical and extratropical measurements. The backscatter ratio (BR) was calculated based on the aerosol particle size distributions measured in situ. The resulting data set was compared with the vertical profiles of the BR detected by the multiwavelength aerosol scatterometer (MAS) and an airborne miniature aerosol lidar (MAL) aboard the M55 Geophysica and by the satellite-borne Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). The data of all four methods largely agree with one another, showing enhanced BR values in the altitude range of the ATAL (between 15 and 18.5km) with a maximum at 17.5km altitude. By means of the AMA-centered equivalent latitude calculated from meteorological reanalysis data, it is shown that such enhanced values of the BR larger than 1.1 could only be observed within the confinement of the AMA. © 2021 Christoph Mahnke et al.
语种	英语
scopus关键词	aerosol; airborne survey; anticyclone; boundary layer; in situ measurement; monsoon; particle size; size distribution; tropopause; Satellites
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/246507
作者单位	Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Institute for Atmospheric Physics, Johannes Gutenberg University, Mainz, Germany; Institute of Atmospheric Sciences and Climate, ISAC-CNR, Rome, Italy; National Institute of Aerospace, Hampton, VA, United States; Nasa Langley Research Center, Hampton, VA, United States; Institute of Energy and Climate Research-IEK7, Forschungszentrum Jülich, Jülich, Germany; Centre Suisse d'Electronique et de Microtechnique, Csem Sa, Neuchâtel, Switzerland; Institut de Physique, Université de Neuchâtel, Neuchâtel, Switzerland; National Institute of Optics, CNR-INO, Sesto Fiorentino, Florence, Italy; Department of Atmospheric Science, University of Wyoming, Laramie, WY, United States; Institute of Energy and Climate Research-IEK8, Forschungszentrum Jülich, Jülich, Germany
推荐引用方式 GB/T 7714	Mahnke C.,Weigel R.,Cairo F.,et al. The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: Microphysical properties derived from aircraft-borne in situ measurements[J],2021,21(19).
APA	Mahnke C..,Weigel R..,Cairo F..,Vernier J.-P..,Afchine A..,...&Borrmann S..(2021).The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: Microphysical properties derived from aircraft-borne in situ measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Mahnke C.,et al."The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: Microphysical properties derived from aircraft-borne in situ measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).