Brown carbon aerosol in the North American continental troposphere: sources, abundance, and radiative forcing

Liu, J.; Scheuer, E.; Dibb, J.; Diskin, G. S.; Ziemba, L. D.; Thornhill, K. L.; Anderson, B. E.; Wisthaler, A.; Mikoviny, T.; Devi, J. J.; Bergin, M.; Perring, A. E.; Markovic, M. Z.; Schwarz, J. P.; Campuzano-Jost, P.; Day, D. A.; Jimenez, J. L.; Weber, R. J.

doi:10.5194/acp-15-7841-2015

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Brown carbon aerosol in the North American continental troposphere: sources, abundance, and radiative forcing

2015
By Liu, J. ; Scheuer, E. ; Dibb, J. ; ...
Source: Atmospheric Chemistry and Physics, 15(14), 7841-7858.

[PDF-416.94 KB]

Details Related Documents You May Also Like

Details:

Journal Title:

Atmospheric Chemistry and Physics
Personal Author:

Liu, J. ; Scheuer, E. ; Dibb, J. ; Diskin, G. S. ; Ziemba, L. D. ; ... More +

Liu, J. ; Scheuer, E. ; Dibb, J. ; Diskin, G. S. ; Ziemba, L. D. ; Thornhill, K. L. ; Anderson, B. E. ; Wisthaler, A. ; Mikoviny, T. ; Devi, J. J. ; Bergin, M. ; Perring, A. E. ; Markovic, M. Z. ; Schwarz, J. P. ; Campuzano-Jost, P. ; Day, D. A. ; Jimenez, J. L. ; Weber, R. J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) Less -
Description:

Chemical components of organic aerosol (OA) selectively absorb light at short wavelengths. In this study, the prevalence, sources, and optical importance of this so-called brown carbon (BrC) aerosol component are investigated throughout the North American continental tropospheric column during a summer of extensive biomass burning. Spectrophotometric absorption measurements on extracts of bulk aerosol samples collected from an aircraft over the central USA were analyzed to directly quantify BrC abundance. BrC was found to be prevalent throughout the 1 to 12 km altitude measurement range, with dramatic enhancements in biomass-burning plumes. BrC to black carbon (BC) ratios, under background tropospheric conditions, increased with altitude, consistent with a corresponding increase in the absorption Angstrom exponent (AAE) determined from a three-wavelength particle soot absorption photometer (PSAP). The sum of inferred BC absorption and measured BrC absorption at 365 nm was within 3% of the measured PSAP absorption for background conditions and 22% for biomass burning. A radiative transfer model showed that BrC absorption reduced top-of-atmosphere (TOA) aerosol forcing by similar to 20% in the background troposphere. Extensive radiative model simulations applying this study background tropospheric conditions provided a look-up chart for determining radiative forcing efficiencies of BrC as a function of a surface-measured BrC : BC ratio and single scattering albedo (SSA). The chart is a first attempt to provide a tool for better assessment of brown carbon's forcing effect when one is limited to only surface data. These results indicate that BrC is an important contributor to direct aerosol radiative forcing.
Source:

Atmospheric Chemistry and Physics, 15(14), 7841-7858.
DOI:

https://doi.org/10.5194/acp-15-7841-2015
Document Type:

Journal Article
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:4095125f95b69d825bed31b579db5241caabc448b49187f018e5b21460e68808
Download URL:

https://repository.library.noaa.gov/view/noaa/21721/noaa_21721_DS1.pdf
File Type:

No Additional Files

More +

Brown carbon aerosol in the North American continental troposphere: sources, abundance, and radiative forcing

Details:

Supporting Files

Related Documents

You May Also Like