(1) Hamilton et al. (2020) Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene(2) Barkley et al. (2019) African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean

Pacific Ocean soluble iron dep.1Southern Ocean soluble iron dep.1 Amazon soluble phosphorus2Selected NASA im

ages of phytoplankton & fire plum

es from M

ODIS Terra & Aqua(proviso: correlation ≠ causation)

Fires in biogeochemical cycles:

2010

to 2

100

1750

to 2

010

driven mainly by altered fire regimes in:

2010

to 2

100

1750

to 2

010

driven by altered dust & fire regimes in:

Southern Ocean drives global Carbon Cycle response

Pacific drives global Nitrogen Cycle response

combustion > dust transport 76

00:1

5300

:1

1000

:1

1300

:1

200:

1

1000

:1

Dust Anth.Fire

Dust Anth.Fire

Southern OceanCarbon Export

EfficiencygC sequestered

per gFesoluble

Pacific (30S-30N) N-Fixation

gN fixed per gFesoluble

Phosphorus

Combustion

Dust

1.00.80.60.40.20.0

J F M A M J J A S O N D

African soluble phosphorus contribution