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Title: Global ocean dimethyl sulfide climatology estimated from observations and an artificial neural network

Journal Article · · Biogeosciences (Online)
 [1];  [2];  [1];  [1]; ORCiD logo [3];  [1]
  1. Univ. of California, Irvine, CA (United States)
  2. Tianjin Univ., Tianjin (China)
  3. Univ. of California, Irvine, CA (United States); Plymouth Marine Lab. (United Kingdom)
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Marine dimethyl sulfide (DMS) is important to climate due to the ability of DMS to alter Earth's radiation budget. Knowledge of the global-scale distribution, seasonal variability, and sea-to-air flux of DMS is needed in order to improve understanding of atmospheric sulfur, aerosol/cloud dynamics, and albedo. Here we examine the use of an artificial neural network (ANN) to extrapolate available DMS measurements to the global ocean and produce a global climatology with monthly temporal resolution. A global database of 82 996 ship-based DMS measurements in surface waters was used along with a suite of environmental parameters consisting of latitude–longitude coordinates, time of day, time of year, solar radiation, mixed layer depth, sea surface temperature, salinity, nitrate, phosphate, and silicate. Linear regressions of DMS against the environmental parameters show that on a global-scale mixed layer depth and solar radiation are the strongest predictors of DMS. These parameters capture ~9 % and ~7 % of the raw DMS data variance, respectively. Multilinear regression can capture more of the raw data variance (~39 %) but strongly underestimates DMS in high-concentration regions. In contrast, the artificial neural network captures ~66 % of the raw data variance in our database. Like prior climatologies our results show a strong seasonal cycle in surface ocean DMS with the highest concentrations and sea-to-air fluxes in the high-latitude summertime oceans. We estimate a lower global sea-to-air DMS flux (20.12±0.43 Tg S yr–1) than the prior estimate based on a map interpolation method when the same gas transfer velocity parameterization is used. Our sensitivity test results show that DMS concentration does not change unidirectionally with each of the environmental parameters, which emphasizes the interactions among these parameters. The ANN model suggests that the flux of DMS from the ocean to the atmosphere will increase with global warming. Given that larger DMS fluxes induce greater cloud albedo, this corresponds to a negative climate feedback.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Aeronautics and Space Administration (NASA); Natural Key Research and Development Program of China
Grant/Contract Number:
SC0016539; NNX15AF31G; 2017YFC1404403
OSTI ID:
1852288
Journal Information:
Biogeosciences (Online), Vol. 17, Issue 21; ISSN 1726-4189
Publisher:
Copernicus Publications, EGUCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

Phytoplankton taxa, irradiance and nutrient availability determine the seasonal cycle of DMSP in temperate shelf seas journal November 2009
Efficient dissolved organic carbon production and export in the oligotrophic ocean journal December 2017
Simulating dimethylsulphide seasonality with the Dynamic Green Ocean Model PlankTOM5 journal January 2010
Convergent estimates of marine nitrogen fixation journal February 2019
Empirical methods for the estimation of Southern Ocean CO2: support vector and random forest regression journal January 2017
Antarctic Sea Ice--a Habitat for Extremophiles journal January 2002
Influence of explicit Phaeocystis parameterizations on the global distribution of marine dimethyl sulfide journal November 2015
A time series of photosynthetically available radiation at the ocean surface from SeaWiFS and MODIS data conference December 2012
A high-resolution time-depth view of dimethylsulphide cycling in the surface sea journal August 2016
Global ocean emission of dimethylsulfide predicted from biogeophysical data: GLOBAL DMS FROM BIOGEOPHYSICAL DATA journal November 2002
The role of differential DMSP production and community composition in predicting variability of global surface DMSP concentrations journal October 2018
A first appraisal of prognostic ocean DMS models and prospects for their use in climate models: CODiM-COMPARISON OF OCEAN DMS MODELS journal September 2010
MIMOC: A global monthly isopycnal upper-ocean climatology with mixed layers: MIMOC journal April 2013
Global trends in marine nitrate N isotopes from observations and a neural network-based climatology journal January 2019
Aerosol–cloud–precipitation interactions. Part 1. The nature and sources of cloud-active aerosols journal July 2008
Examining the consistency of products derived from various ocean color sensors in open ocean (Case 1) waters in the perspective of a multi-sensor approach journal November 2007
On the relationship between ocean DMS and solar radiation journal January 2009
Physiological aspects of the production and conversion of DMSP in marine algae and higher plants journal August 2000
Industrial-era decline in subarctic Atlantic productivity journal May 2019
New and important roles for DMSP in marine microbial communities journal August 2000
Carbon-to-chlorophyll ratio and growth rate of phytoplankton in the sea journal May 2009
Potential impact of climate change on marine dimethyl sulfide emissions journal January 2003
Flux of Gases across the Air-Sea Interface journal January 1974
Differential response of planktonic primary, bacterial, and dimethylsulfide production rates to static vs. dynamic light exposure in upper mixed-layer summer sea waters journal January 2013
A Non-singular Horizontal Position Representation journal May 2010
Effects of solar radiation on dimethylsulfide cycling in the western Atlantic Ocean journal January 2006
Extreme spikes in DMS flux double estimates of biogenic sulfur export from the Antarctic coastal zone to the atmosphere journal February 2019
Evaluation of diverse approaches for estimating sea-surface DMS concentration and air–sea exchange at global scale journal January 2016
Dependence of DMS global sea-air flux distribution on transfer velocity and concentration field type: DMS GLOBAL SEA-AIR FLUX DISTRIBUTION journal April 2009
The marine chemistry of dimethylsulfide journal February 1984
Diel patterns of oceanic dimethylsulfide (DMS) cycling: Microbial and physical drivers: DIEL PATTERNS OF DMS CYCLING journal July 2013
A remote sensing algorithm for planktonic dimethylsulfoniopropionate (DMSP) and an analysis of global patterns journal December 2015
Strong Relationship Between DMS and the Solar Radiation Dose over the Global Surface Ocean journal January 2007
Decadal increase in Arctic dimethylsulfide emission journal September 2019
Temporal variability of dimethylsulfide and dimethylsulfoniopropionate in the Sargasso Sea journal December 1998
Spatial predictions of sea surface dimethylsulfide concentrations in the high arctic journal January 2012
The North Atlantic Aerosol and Marine Ecosystem Study (NAAMES): Science Motive and Mission Overview journal March 2019
Production of atmospheric sulfur by oceanic plankton: biogeochemical, ecological and evolutionary links journal June 2001
An updated climatology of surface dimethlysulfide concentrations and emission fluxes in the global ocean: UPDATED DMS CLIMATOLOGY journal January 2011
Machine learning for data-driven discovery in solid Earth geoscience journal March 2019
Biogeochemistry of dimethylsulfide in the South China Sea journal January 1999
Experimental determination of the diffusion coefficient of dimethylsulfide in water journal January 1993
Sea-surface dimethylsulfide (DMS) concentration from satellite data at global and regional scales journal January 2018
Spectral irradiance dependence of sunlight effects on plankton dimethylsulfide production journal February 2013
The Dimethylsulfide Cycle in the Eutrophied Southern North Sea: A Model Study Integrating Phytoplankton and Bacterial Processes journal January 2014
Light-driven cycling of dimethylsulfide (DMS) in the Sargasso Sea: Closing the loop: LIGHT-DRIVEN DMS CYCLING journal May 2004
Water-air flux of dimethylsulfide journal January 2000
In situ evaluation of air-sea gas exchange parameterizations using novel conservative and volatile tracers journal March 2000
Incorporating Phaeocystis into a Southern Ocean ecosystem model journal January 2011
Increased intrusion of warming Atlantic water leads to rapid expansion of temperate phytoplankton in the Arctic journal February 2018
A global database of sea surface dimethylsulfide (DMS) measurements and a procedure to predict sea surface DMS as a function of latitude, longitude, and month journal June 1999
Short-term variability in the open ocean cycle of dimethylsulfide journal December 1999
The non-linear influence of wind-speed variability on gas transfer in lakes journal January 1993
The analysis of dimethylsulfide and dimethylsulfoniopropionate in sea ice: Dry-crushing and melting using stable isotope additions journal January 2012
An antioxidant function for DMSP and DMS in marine algae journal July 2002

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54 ENVIRONMENTAL SCIENCES
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