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Title

Remote Sensing Retrieval of Isoprene Concentrations in the Southern Ocean

AuthorsRodríguez-Ros, P. ; Galí, Martí ; Cortes, Pau ; Robinson, Charlotte Mary; Antoine, D.; Wohl, Charel; Yang, MingXi; Simó, Rafel
Issue DateJul-2020
PublisherAmerican Geophysical Union
CitationGeophysical Research Letters 47(13): e2020GL087888 (2020)
AbstractIsoprene 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
Description10 pages, 4 figures, supporting information https://doi.org/10.1029/2020GL087888.-- Data are available at the Zenodo repository (https://doi.org/10.5281/zenodo.3822547, DOI: 10.5281/zenodo.3822547)
Publisher version (URL)https://doi.org/10.1029/2020GL087888
URIhttp://hdl.handle.net/10261/216315
DOI10.1029/2020GL087888
ISSN0094-8276
E-ISSN1944-8007
Appears in Collections:(ICM) Artículos
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