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The Upside of Climate Change

On Judith Curry’s Climate Etc. blog, Patrick J. Michaels discusses, “The most amazing greening on Earth“:

A new paper by Simon Munier, of France’s Centre National de Recherches Météorologiques, and several co-authors, segregates satellite-sensed LAI [Leaf Area Index] data into different vegetation types, taken over the period 1999-2015. This allows the researchers to quantitatively determine the amount of greening that is taking place over time, depending upon the vegetation type. …

The cool part of the paper is its Figure 8, showing mean and trend values worldwide for the LAI in six vegetation types:

Factorial simulations with multiple global ecosystem models suggest that CO2 fertilization effects explain 70% of the observed greening trend, followed by nitrogen deposition (9%), climate change (8%) and land cover change (LCC) (4%). CO2 fertilization effects explain most of the greening trends in the tropics, whereas climate change resulted in greening of the high latitudes and the Tibetan Plateau.

In other words, 78 [70 + 8] percent of observed planetary greening is caused by carbon dioxide and its effect upon climate. …

We have repeatedly demonstrated … that about a half of a degree (C) of observed planetary warming is ascribable to anthropogenerated changes in the atmosphere. The main result appears to be a planet that is becoming so much greener that it is readily apparent from space.

Jon Guze / Director of Legal Studies

Jon Guze is the Director of Legal Studies at the John Locke Foundation. Before joining the John Locke Foundation, Jon practiced law in Durham, North Carolina for over twent...

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