Eric Davidson

Professor Emeritus, UMCES · 1 appearance on the record.

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academicscientistauthorumces.edu/eric-davidson ↗Wikipedia ↗

Eric A. Davidson is a researcher focusing on soil nutrient cycling, terrestrial greenhouse gas emissions, and sustainable agriculture. He is a past president of the American Geophysical Union and serves as Professor Emeritus at the University of Maryland Center for Environmental Science.

9statements → 7claims → 7claims resolved → 100%fully supported → 3.89/5average certainty → 1.11/5average debate potential → ≈4.5/5argument clarity, estimated →

7 supported 0 partly supported 0 contradicted how the 7 claims stand · each chip opens the sources

7 assertions · 2 insights · every statement was checked. The predictions and assertions are the 7 claims: statements the public record can support or contradict. 7 are resolved. Everything else (opinions, insights, what ifs, disclosures) can never be settled by the record, so it carries no assessment.

The record, in short

What the tape says about how Eric argues and how the claims held up. Everything they said, and everything said about them, is in the tabs below.

Their most notable supported claim

Assertion Supported

Davidson: Nitrous oxide is the largest currently emitted ozone-depleting substance

“Now that we've been successful through the Montreal Protocol in reducing emissions of chlorofluorocarbons and now hydrofluorocarbons, N-to-O remains as the largest currently emitted ozone depleting substance.”

Eric Davidson Mar 16, 2023 ▶ 6:55 The greenhouse gas you don’t know about

Expressed certainty vs assessment result

none yet certainty 1

none yet certainty 2

100% certainty 3

100% certainty 4

none yet certainty 5

weighted support: a fully supported claim counts one, a partly supported claim counts half. Each filled bar is clickable and opens exactly those claims; "none yet" means nothing said at that certainty level has resolved yet

How they sound: not measured why? →

We measure speaking style by listening to the audio itself, and a fair number needs at least 2,000 words from one person on tape we have measured. There is too little of Eric Davidson on measured tape to publish a rate. This says nothing about how they speak.

What they said9 Episodes1

Everything Eric Davidson said on Catalyst that made the record, most notable first. Filter by type, assessment or year in the ledger →

Assertion Supported

Davidson: Nitrous oxide is the largest currently emitted ozone-depleting substance

Eric Davidson Mar 16, 2023 ▶ 6:55 The greenhouse gas you don’t know about

Insight

Davidson: Farmers overapply fertilizer as an insurance policy for bumper crop years

“That additional amount that I spend on fertilizers, yeah, it's significant, but it's, relatively speaking, it's not that bad of a deal as an insurance policy to make sure that I get the best possible yield I can.”

Eric Davidson Mar 16, 2023 ▶ 35:09 The greenhouse gas you don’t know about

Assertion Supported

Davidson: Nitrous oxide drives about 7% of radiative forcing

“About seven percent of the radiative forcing is, on the hundred-year timescale, is attributed to N to O.”

Eric Davidson Mar 16, 2023 ▶ 6:26 The greenhouse gas you don’t know about

Assertion Supported

Davidson: Atmospheric N2O is up 25% from pre-industrial levels to 335 ppb

“The atmospheric N-to-O prior to the Industrial Revolution was around 270 parts per billion. That's a B as in boy. And it's now up around 335. So it's gone up by about 25%, and it's going up more rapidly in the last decade than the decade before and the decade …”

Eric Davidson Mar 16, 2023 ▶ 8:14 The greenhouse gas you don’t know about

Assertion Supported

Davidson: Nitrous oxide emissions persist in the atmosphere for 100+ years

“It has such a long lifetime that what we're emitting now is going to stay in the atmosphere for a hundred years or more and so, you know, it's going to have an impact on several future generations.”

Eric Davidson Mar 16, 2023 ▶ 10:55 The greenhouse gas you don’t know about

Assertion Supported

Davidson: Post-WWII synthetic fertilizer adoption disrupted atmospheric N2O equilibrium

“Farmers began using synthetic fertilizers after World War II, and the rate of increase just sort of skyrocketed after that, and that was sort of the beginning of the end of An equilibrium of the N-to-O budget, because once we started using much more synthetic …”

Eric Davidson Mar 16, 2023 ▶ 20:55 The greenhouse gas you don’t know about

Assertion Supported

Davidson: Crops absorb only about half of applied nitrogen fertilizer

“They take up, on average, roughly half of the fertilizer that we apply. Some crops take up more than half, some crops take up less than half, but a good rule of thumb, on average, is that only about half of the fertilizers we put on the land, and cropland, get…”

Eric Davidson Mar 16, 2023 ▶ 25:50 The greenhouse gas you don’t know about

Assertion Supported

Davidson: US agricultural N2O emissions have remained flat over recent decades

“In the last few decades in the U.S., for example, nitrous oxide emissions from agriculture have been sort of flat. They've maybe gone up a little bit in the last few years, but they haven't gone up much, and that's because we are making some improvements in ef…”

Eric Davidson Mar 16, 2023 ▶ 39:37 The greenhouse gas you don’t know about

Insight

Davidson: Geographic separation of livestock and feed crops drives N2O emissions

“We have huge hog operations in North Carolina that's a long ways away from where we grow the corn and soybeans in Iowa and in Illinois. So we don't do a really good job of recycling the manure, so that's another place where more nitrous oxide is produced.”

Eric Davidson Mar 16, 2023 ▶ 41:38 The greenhouse gas you don’t know about

Appearances (1)

Episode	Date	Speaking time
The greenhouse gas you don’t know about	Mar 16, 2023	28m

Eric Davidson

The record, in short

Their most notable supported claim

Expressed certainty vs assessment result

How they sound: not measured why? →

Appearances (1)

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