The sources of the water soluble organic matter contained in the aerosols over the Atlantic ocean decoded

Organic matter is an important component of aerosols, which can absorb (or scatter) light, contributing a warming (or cooling) effect to the atmospheric radiative budget. However, this impact is tightly linked to the molecular characteristics of aerosol organic matter. It is, therefore, of prime importance to establish the organic matter molecular details of aerosols from different sources.

This characterization is the aim of Wozniak et al. paper (2014, see reference below). Based on aerosols samples collected in the framework of the North Atlantic US GEOTRACES GA03 cruise, the authors analyzed their water soluble organic matter (WSOM) molecular characteristics using an ultrahigh-resolution analytical method*. Multivariate statistics allowed the identification of five sources with very different distinguishing WSOM characteristics, enlightening the origin of these different aerosol components.

*electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry.

14 Wozniak l
Figure. Three dimensional plots showing the principal component analysis a) scores for samples from the five aerosol emission sources and the b) molecular formula loadings that distinguish each source from the others. Click here to view the image larger.

 

Reference:

Wozniak, A. S., Willoughby, A. S., Gurganus, S. C., & Hatcher, P. G. (2014). Distinguishing molecular characteristics of aerosol water soluble organic matter from the 2011 trans-North Atlantic US GEOTRACES cruise. Atmospheric Chemistry and Physics, 14(16), 8419–8434. doi: 10.5194/acp-14-8419-2014 Click here to access the paper.

 

Latest highlights

Science Highlights

The most important thorium-234 disequilibrium compilation you ever saw

Elena Ceballos-Romero and her colleagues propose a comprehensive global oceanic compilation of Thorium-234 measurements.

23.06.2022

Science Highlights

Machine learning approach led to the first iron climatology

Huang and co-workers propose the first data-driven surface-to-seafloor dissolved iron climatology.

21.06.2022

Science Highlights

Insight on the aluminium cycling during the inter-monsoon period in the Arabian Sea and Equatorial Indian Ocean

Full vertical water column profiles were established by Singh and Singh along the GI05 transect in the Indian Ocean during the fall inter-monsoon period in 2015.

Science Highlights

Distributions, boundary inputs, and scavenging processes of trace metals in the East Sea (Japan Sea)

Seo and his colleagues show pronounced atmospheric and shelf inputs of trace elements in the Japan Sea.

14.06.2022

Rechercher