English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Carbonyl sulfide (COS) is the major long-lived sulfur bearing gas in the atmosphere, and is used to estimate the rates of regional and global (both past and current) photosynthesis. Sulfur isotope measurements ( 34 S/ 32 S ratio, δ 34 S) of COS may offer a way for improved determinations of atmospheric COS sources. However, measuring the COS δ 34 S at the atmospheric concentrations of ~0.5 ppb is challenging. Here we present high-accuracy δ 34 S measurements of atmospheric COS done by gas chromatograph (GC) connected to a multicollector inductively coupled plasma mass spectrometer (MC-ICPMS), after pre-concentrating from 2-liters of air. We showed that the precision of COS δ 34 S measurement for gas standards is ≤0.2‰, and that N 2  and CO 2  in the gas standard mixture had no effect on the measured δ 34 S. Natural air samples were collected in Israel and in the Canary Islands. The COS δ 34 S values in both locations were found to be 13.2 ± 0.6‰, and are believed to represent the background tropospheric value. This δ 34 S value is markedly different from the previously reported value of 4.9‰. We estimate the expected isotopic signature of COS sources and sinks, and use the δ 34 S value of atmospheric COS we measured to estimate that ~48% of it originates from the ocean.

Sulfur isotopes ratio of atmospheric carbonyl sulfide constrains its sources