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Record Details

Record 6 of 3319
Measurements of atmospheric dimethylsulfide, hydrogen sulfide, and carbon disulfide during GTE/CITE 3
Author and Affiliation:
Cooper, David J.(University of Miami, Miami, FL, United States)
Saltzman, Eric S.(University of Miami, Miami, FL, United States)
Abstract: Measurements of atmospheric dimethylsulfide (DMS), hydrogen sulfide (H2S), and carbon disulfide (CS2) were made over the North and South Atlantic Ocean as part of the Global Tropospheric Experiment/Chemical Instrumentation Test and Evaluation (GTE/CITE 3) project. DMS and CS2 samples were collected and analyzed using an automated gas chromatography/flame photometric detection system with a sampling frequency of 10 min. H2S samples were collected using silver nitrate impregnated filters and analyzed by fluorescence quenching. The DMS data from both hemispheres have a bimodal distribution. Over the North Atlantic this reflects the difference between marine and continental air masses. Over the South Atlantic it may reflect differences in the sea surface source of DMS, corresponding to different air mass source regions. The median boundary layer H2S and CS2 levels were significantly higher in the northern hemisphere than the southern hemisphere, reflecting the higher frequency of samples influenced by pollutant and/or coastal emissions. Composite vertical profiles of DMS and H2S are similar to each other, are consistent with a sea surface source. Vertical profiles of CS2 have maxima in the free troposphere, implicating a continental source. The low levels of H2S and CS2 found in the southern hemisphere constrain the role of these compounds in global budgets to significantly less than previously estimated.
Publication Date: Dec 20, 1993
Document ID:
19950049248
(Acquired Dec 28, 1995)
Accession Number: 95A80847
Subject Category: ENVIRONMENT POLLUTION
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); 98; D12; p. 23,397-23,409
Publisher Information: United States
Contract/Grant/Task Num: NSF ATM-87-09802; NAG1-918
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ATMOSPHERIC CIRCULATION; ATMOSPHERIC COMPOSITION; BIOCONVERSION; CARBON DISULFIDE; CHEMICAL COMPOSITION; DIMETHYL COMPOUNDS; HYDROGEN SULFIDE; MAN ENVIRONMENT INTERACTIONS; MARINE ENVIRONMENTS; POLLUTION TRANSPORT; SPATIAL DISTRIBUTION; ATLANTIC OCEAN; BOUNDARY CONDITIONS; BOUNDARY LAYERS; FILTRATION; FLUORESCENCE; GAS CHROMATOGRAPHY; NORTHERN HEMISPHERE; OCEAN SURFACE; PHOTOMETERS; SAMPLING; SOUTHERN HEMISPHERE; TROPOSPHERE; VERTICAL DISTRIBUTION
Imprint And Other Notes: Journal of Geophysical Research vol. 98, no. D12 p. 23,397-23,409 December 12, 1993
Availability Source: Other Sources
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