Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3)

Abstract. This paper presents an updated estimation of the bottom-up global surface seawater dimethyl sulfide (DMS) climatology. update, called DMS-Rev3, is third its kind and includes five significant changes from last climatology, L11 (Lana et al., 2011), that was released about a decade ago. The first change inclusion new observations have become available over decade, creating database 873 539 leading to ∼ 18-fold increase in raw data as compared estimation. second improvements handling, processing, filtering, avoid biases due different observation frequencies which result measurement techniques. Thirdly, we incorporate dynamic seasonal observed geographic boundaries ocean biogeochemical provinces. fourth involves refinement interpolation algorithm used fill missing data. Lastly, upgraded smoothing based on DMS variability length scales (VLS) helps reproduce more realistic distribution concentration results show DMS-Rev3 estimates annual mean be 2.26 nM (2.39 without sea-ice mask), i.e., 4 % lower than previous However, regional differences 100 are observed. sea-to-air flux estimated at 27.1 TgS yr−1, L11, although, like distribution, large were largest high regions such polar oceans, although oceanic under-sampled past also between revisions Finally, reduces previously patchiness productivity regions. along with algorithm, can found online repository: https://doi.org/10.17632/hyn62spny2.1 (Mahajan, 2021).