Nature News downplays a message found in a seawater bottle
The gap between environmental science
and its representation to the public continues to widen. The
prospective use of iron to reduce CO2 by enhancing plankton blooms at
sea has created one of the warmer fronts in the Climate Wars , so
consider Nature's online coverage
of the discovery that "Each atom of iron supplied from below pulled
more than 100,000 atoms of carbon out of the atmosphere by stimulating plankton
growth. "
This startling fact appears in Nature in a peer reviewed study of the annual outburst of sea life that teems in the waters upwelling around Kerguelen Island : Effect of
natural iron fertilization on carbon sequestration in the Southern Ocean.
Debate about its future policy implications is already off to a
false start. Science news is, by definition, new , and the research
first surfaced on April 23 in Nature News
. a free website more simply written and widely read than the erudite
(and expensive) science journal it summarizes. Few will read what
Stephane' Blain and forty-six colleagues wrote. What counts instead is
headline hype. Quintin Schiermeier's news article leads off like a
purple tyrannosaur lecturing tots in a nanny state nursery:
Only Mother Nature Knows How To Fertilize The Ocean
Its subheads are minor masterpieces of Green tabloid science . One :
'Natural input of nutrients works ten times better than
manmade injections' dis-informs readers by inverting the math -- 'manmade injections' still enjoy 10,000 to 1
leverage in carbon sequestration. The other speaks for itself
:
Geo-engineering the ocean won't
work
Despite the headline , that's not the scientific article's
subject--or its conclusion. It's about biogeochemistry from top to
bottom ,and Schiermeier's polemic dismissal of
iron fertilization is a manifest example of op-ed engineering.
Instead of
the 46 authors of the peer-reviewed Letter To Nature, he quotes
only one marine scientist , Ulf Riebesell , who "has been involved in one previous ocean fertilization experiment."
Nature News offers only Riebesell's contention that: "What the team has
observed is probably the optimal efficiency of carbon export achievable, you
just can't achieve nature's efficiency...That's why geo-engineering the ocean
won't work." It also states of fertilization studies at sea "An estimated 80-95% of the iron in these experiments has been 'lost.'
This negative spin contrasts with the Biogeochemistry review by New
Zealand oceanographer Philip Boyd in the magazine ,which notes both
the difference between
continuous mixing of deep waters and brief fertilization experiments,
and that the new study of natural iron accounts for only 20% of the
plankton bloom's uptake.
The study of optimizing iron delivery in synergy with oceanic plant nutrients has
barely begun. Yet though speculation about its economic future needs taking with a rather large grain of ferrous sulfate enriched salt. One entrepreneur quoted in today's Times story has an interesting track record , but Nature
itself concedes that , even in its present infant
form--chucking raw iron salts over the transom of research vessels --
, ocean fertilization could
reduce CO2 in the air by 3%--that's 1.4 billion tons annually.
No reasonable scientist expects a
new species of engineering , Geo- or otherwise, to converge on the
limits
of nature and practicality in the first few tries. Ocean water comes in
many flavors and unique
phytoplankton communities have evolved to take
advantage of the
taste of each. It took decades of research on land to develop the
soil-specific targeted micronutrients ( E.G. boron and copper ) that
enable the Green Revolution to fend off
famine in human communities too poor to afford bulk nitrogen and
phosphorous fertilizers.
If anything should make mother nature queasy , it's the odor of 19th century Vitalism permeating Nature News' anemic
coverage of iron's huge carbon offset return. The premise that iron
atoms touched by man somehow differ
from those upwelling from the deep green sea may appeal to Dark Greens, but it too much recalls the metaphysical aversion to
biotech of the religious Right, and pop ecologists who
blanch at ocean fertilization while exhorting us to eat farmed salmon
raised on
a Geritol spiked diet.
Half a century ago , Al Gore's erstwhile mentor, atmospheric
scientist Roger Revelle observed that in pouring CO2 into the air
"human beings are now carrying out a large scale geophysical
experiment."
Engineers instead ask how best to design the experiment
.Climate change is not a matter of one generation, and neither is
technology. Its permanance as an evolving human institution
necessarily requires an ever growing understanding of of our
interaction with nature , including the biogeochemical cycle of iron.
From colloid
chemistry ( the Victorian term for nanotech ) to nutritional ecology,
the task of learning the limits of our capacity for constructive
environmental change remains largely unpaid for and undone.
This seems lost on Al Gore. His response to the promise of geo-engineering has been to propose a
Wayback Machine instead. His call to cut CO2 90% by 2050 means turning
the energy clock back to 1880--and waving goodbye to much carbon-based
civilization has achieved in the
century since Revelle's scientific forebears launched the Challenger Expedition.By ignoring the technical depth of this new controversy , Nature News has created an hazard to scientific navigation too. Nature is a flagship journal many media leaders follow like The Economist, presuming its rigorously peer-reviewed wake will lead to safe harbor. Suffering Nature News online to pop off Green flares risks luring them all onto the scientific rocks.
So please read the whole thing-- Nature is available in any science library-- to get past the Post-Earth Day, Pre-IPCC report press conference bits and access both the Biogeochemistry review and Blair et al.