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    Remote Sensing Retrieval of Isoprene Concentrations in the Southern Ocean

    80278.pdf (4.283Mb)
    Access Status
    Open access
    Authors
    Rodriguez-Ros, Pablo
    Gali, Marti
    Cortes, Pau
    Robinson, Charlotte
    Antoine, David
    Wohl, Charel
    Yang, MingXi
    Simo, Rafel
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rodriguez-Ros, P. and Gali, M. and Cortes, P. and Robinson, C.M. and Antoine, D. and Wohl, C. and Yang, M. et al. 2020. Remote Sensing Retrieval of Isoprene Concentrations in the Southern Ocean. Geophysical Research Letters. 47 (13): Article No e2020GL087888.
    Source Title
    Geophysical Research Letters
    DOI
    10.1029/2020GL087888
    ISSN
    0094-8276
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP160103387
    Remarks

    Copyright © 2020 American Geophysical Union

    URI
    http://hdl.handle.net/20.500.11937/80196
    Collection
    • Curtin Research Publications
    Abstract

    Isoprene produced by marine phytoplankton acts as a precursor of secondary organic aerosol and thereby affects cloud formation and brightness over the remote oceans. Yet the marine isoprene emission is poorly constrained, with discrepancies among estimates that reach 2 orders of magnitude. Here we present ISOREMS, the first satellite‐only based algorithm for the retrieval of isoprene concentration in the Southern Ocean. Sea surface concentrations from six cruises were matched with remotely sensed variables from MODIS Aqua, and isoprene was best predicted by multiple linear regression with chlorophyll a and sea surface temperature. Climatological (2002–2018) isoprene distributions computed with ISOREMS revealed high concentrations in coastal and near‐island waters, and within the 40–50°S latitudinal band. Isoprene seasonality paralleled phytoplankton productivity, with annual maxima in summer. The annual Southern Ocean emission of isoprene was estimated at 63 Gg C yr−1. The algorithm can provide spatially and temporally realistic inputs to atmospheric and climate models.

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