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Reply to comment by S. H. Larsen on “Analysis of a potential “solar radiation dose–dimethylsulfide–cloud condensation nuclei” link from globally mapped seasonal correlations”
Author(s) -
Vallina S. M.
Publication year - 2008
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2007gb003099
Subject(s) - dimethylsulfoniopropionate , phytoplankton , irradiance , cloud condensation nuclei , scavenging , chemistry , oceanography , atmospheric sciences , environmental science , nutrient , physics , aerosol , biochemistry , geology , optics , organic chemistry , antioxidant
] In the work of Vallina et al. [2007] we showed that theseasonality of the solar radiation dose received in the uppermixed layer (or SRD) was highly positively correlated withdimethylsulfide (DMS) concentration seasonality over mostoftheglobalocean.Theunderlyingmechanismwassuggestedto be an increase in phytoplankton (direct) DMS productionthrough algal cleavage of dimethylsulfoniopropionate(DMSP) in response to ultraviolet radiation (UVR) drivencell stress [Sunda et al., 2002]. In this regard, Larsen [2008]gives an alternative explanation for the observed couplingbetween DMS and the SRD. Briefly, he suggests that thedrivingforcesbehindDMSproductionareinfactseasurfacetemperature (SST) and PAR, mainly through their effect onphytoplankton growth rate.