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Title: Composition and physical properties of the Asian Tropopause Aerosol Layer and the North American Tropospheric Aerosol Layer: Composition of ATAL and NATAL

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2015gl063181· OSTI ID:1354907
ORCiD logo [1];  [1];  [2];  [3];  [4]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Atmospheric and Oceanic Sciences and Lab. for Atmospheric and Space Physics
  2. Univ. of Leeds (United Kingdom). National Centre for Atmospheric Science and Inst. of Climate and Atmospheric Science; National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry Division; Univ. of Colorado, Boulder, CO (United States). CIRES
  3. Lund Univ. (Sweden). Division of Nuclear Physics
  4. Air Chemistry Division, Max Planck Institute for Chemistry (Otto Hahn Institute), Mainz Germany; Max Planck Society, Mainz (Germany). Max Planck Inst. for Chemistry. Division of Nuclear Physics

Recent studies revealed layers of enhanced aerosol scattering in the upper troposphere and lower stratosphere over Asia (Asian Tropopause Aerosol Layer (ATAL)) and North America (North American Tropospheric Aerosol Layer (NATAL)). We use a sectional aerosol model (Community Aerosol and Radiation Model for Atmospheres (CARMA)) coupled with the Community Earth System Model version 1 (CESM1) to explore the composition and optical properties of these aerosol layers. The observed aerosol extinction enhancement is reproduced by CESM1/CARMA. Both model and observations indicate a strong gradient of the sulfur-to-carbon ratio from Europe to the Asia on constant pressure surfaces. We found that the ATAL is mostly composed of sulfates, surface-emitted organics, and secondary organics; the NATAL is mostly composed of sulfates and secondary organics. In conclusion, the model also suggests that emission increases in Asia between 2000 and 2010 led to an increase of aerosol optical depth of the ATAL by 0.002 on average which is consistent with observations.

Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FC02-97ER62402
OSTI ID:
1354907
Journal Information:
Geophysical Research Letters, Vol. 42, Issue 7; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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Cited By (27)

Stratospheric aerosol-Observations, processes, and impact on climate: Stratospheric Aerosol journal May 2016
Transport of chemical tracers from the boundary layer to stratosphere associated with the dynamics of the Asian summer monsoon: CHEMICAL TRANSPORT BY THE ASIAN MONSOON journal December 2016
Cirrus Clouds and Their Response to Anthropogenic Activities journal February 2017
Efficient In-Cloud Removal of Aerosols by Deep Convection journal January 2019
Ammonium nitrate particles formed in upper troposphere from ground ammonia sources during Asian monsoons journal July 2019
Origin, Maintenance and Variability of the Asian Tropopause Aerosol Layer (ATAL): The Roles of Monsoon Dynamics journal March 2018
Elevated aerosol layer over South Asia worsens the Indian droughts journal July 2019
Efficient transport of tropospheric aerosol into the stratosphere via the Asian summer monsoon anticyclone journal June 2017
Five-S-isotope evidence of two distinct mass-independent sulfur isotope effects and implications for the modern and Archean atmospheres journal August 2018
The South Asian monsoon—pollution pump and purifier journal June 2018
Variability and evolution of the midlatitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations journal January 2017
Investigation of the aerosol–cloud–rainfall association over the Indian summer monsoon region journal January 2017
Modeling the aerosol chemical composition of the tropopause over the Tibetan Plateau during the Asian summer monsoon journal January 2019
Transport of the 2017 Canadian wildfire plume to the tropics via the Asian monsoon circulation journal January 2019
Relationship between Asian monsoon strength and transport of surface aerosols to the Asian Tropopause Aerosol Layer (ATAL): interannual variability and decadal changes journal January 2019
Improvement of stratospheric aerosol extinction retrieval from OMPS/LP using a new aerosol model journal January 2018
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway journal January 2019
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design journal January 2018
Improved tropospheric and stratospheric sulfur cycle in the aerosol–chemistry–climate model SOCOL-AERv2 journal January 2019
Improvement of stratospheric aerosol extinction retrieval from OMPS/LP using a new aerosol model posted_content July 2018
Ammonium nitrate particles formed in upper troposphere from ground ammonia sources during Asian monsoons text January 2019
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design text January 2018
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above Northern Norway posted_content March 2019
Improved tropospheric and stratospheric sulfur cycle in the aerosol-chemistry-climate model SOCOL-AERv2 text January 2019
Exploring the inorganic composition of the Asian Tropopause Aerosol Layer using medium-duration balloon flights text January 2022
Global modelling studies of composition and decadal trends of the Asian Tropopause Aerosol Layer journal August 2020
Global modeling studies of composition and decadal trends of the Asian Tropopause Aerosol Layer journal February 2021

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