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  Interpreting the seasonal cycles of atmospheric oxygen and carbon dioxide concentrations at American Samoa Observatory

Manning, A. C., Keeling, R. F., Katz, L. E., Paplawsky, W. J., & Mcevoy, E. M. (2003). Interpreting the seasonal cycles of atmospheric oxygen and carbon dioxide concentrations at American Samoa Observatory. Geophysical Research Letters, 30(6), 1333. doi:10.1029/2001GL014312.

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BGC0617.pdf (Verlagsversion), 341KB
 
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http://dx.doi.org/10.1029/2001GL014312 (Verlagsversion)
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 Urheber:
Manning, A. C.1, Autor           
Keeling, R. F., Autor
Katz, L. E., Autor
Paplawsky, W. J., Autor
Mcevoy, E. M., Autor
Affiliations:
1Tall Tower Atmospheric Gas Measurements, Dr. J. Lavrič, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497786              

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Schlagwörter: southern-hemisphere air; transport; o-2
 Zusammenfassung: We present seven years of atmospheric O-2/N-2 ratio and CO2 concentration data measured from flask samples collected at American Samoa. These data are unusual, exhibiting higher short-term variability, and seasonal cycles not in phase with other sampling stations. The unique nature of atmospheric data from Samoa has been noted previously from measurements of CO2, methyl chloroform, and ozone. With our O-2 data, we observe greater magnitude in the short-term variability, but, in contrast, no clear seasonal pattern to this variability. This we attribute to significant regional sources and sinks existing for O-2 in both hemispheres, and a dependence on both the latitudinal and altitudinal origins of air masses. We also hypothesize that some samples exhibit a component of "older'' air, demonstrating recirculation of air within the tropics. Our findings could be used to help constrain atmospheric transport models which are not well characterized in tropical regions.

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 Datum: 2003
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1029/2001GL014312
ISI: ://000182817500001
Anderer: BGC0617
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Titel: Geophysical Research Letters
  Kurztitel : GRL
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Geophysical Union
Seiten: - Band / Heft: 30 (6) Artikelnummer: - Start- / Endseite: 1333 Identifikator: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217