Characterization of organic residues of size-resolved fog droplets and their atmospheric implications

Chakraborty, Abhishek; Ervens, Barbara; Gupta, Tarun; Tripathi, Sachchida N.

doi:10.1002/2015jd024508

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

i

Characterization of organic residues of size-resolved fog droplets and their atmospheric implications

2016
By Chakraborty, Abhishek ; Ervens, Barbara ; Gupta, Tarun ; ...
Source: Journal of Geophysical Research-Atmospheres, 121(8), 4317-4332.

[PDF-724.45 KB]

Details Related Documents You May Also Like

Details:

Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Chakraborty, Abhishek ; Ervens, Barbara ; Gupta, Tarun ; Tripathi, Sachchida N.

Chakraborty, Abhishek ; Ervens, Barbara ; Gupta, Tarun ; Tripathi, Sachchida N. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

Size-resolved fog water samples were collected in two consecutive winters at Kanpur, a heavily polluted urban area of India. Samples were analyzed by an aerosol mass spectrometer after drying and directly in other instruments. Residues of fine fog droplets (diameter: 4-16 mu m) are found to be more enriched with oxidized (oxygen to carbon ratio, O/C = 0.88) and low volatility organics than residues of coarse (diameter > 22 mu m) and medium size (diameter: 16-22 mu m) droplets with O/C of 0.68 and 0.74, respectively. These O/C ratios are much higher than those observed for background ambient organic aerosols, indicating efficient oxidation in fog water. Accompanying box model simulations reveal that longer residence times, together with high aqueous OH concentrations in fine droplets, can explain these trends. High aqueous OH concentrations in smaller droplets are caused by their highest surface-volume ratio and high Fe and Cu concentrations, allowing more uptake of gas phase OH and enhanced Fenton reaction rates, respectively. Although some volatile organic species may have escaped during droplet evaporation, these findings indicate that aqueous processing of dissolved organics varies with droplet size. Therefore, large (regional, global)-scale models need to consider the variable reaction rates, together with metal-catalyzed radical formation throughout droplet populations for accurately predicting aqueous secondary organic aerosol formation.
Source:

Journal of Geophysical Research-Atmospheres, 121(8), 4317-4332.
DOI:

https://doi.org/10.1002/2015jd024508
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:a02a81d15eba0e02a2d93bf1b14a2e14c5c5dff63b610bb528346c1d9f0ed641
Download URL:

https://repository.library.noaa.gov/view/noaa/21502/noaa_21502_DS1.pdf
File Type:

No Additional Files

More +

Characterization of organic residues of size-resolved fog droplets and their atmospheric implications

Details:

Supporting Files

Related Documents

You May Also Like