My background is in soils... not climate science.
Depending upon transitional management practices and slope... after
clear cutting there's likely to be significant soil (and soc) erosion
relative to the remaining forested soil.
There are deep soc deposits in stream beds throughout ag country. Are
these reserves usually taken into account in global soc estimates?
Anecdotally...
A soil mapper told me he encountered a family woodlot on ag land. The
original soil under each was a mollisol (high soc)... but the eroded
agronomic soil had lost significant surface SOC and was, therefore,
classed into a different soil map unit than the woodlot soil. fwiw...
The point of his story was that NRCS wouldn't let him draw a rectangular
soil map unit around the rectangular woodlot.
On 9/6/2018 2:00 AM, Andrew Lockley wrote:
Forests also create biogenic aerosols, which influence both albedo and
rainfall. This is a complex effect, as
A) emissions aren't constant, typically rising in hot weather
B) rainfall effects vary depending on local conditions, especially
background aerosol pollution.
The smoky mountains are well-known for this effect
A
On Thu, 6 Sep 2018, 01:54 Jessica Gurevitch,
<[email protected]
<mailto:[email protected]>> wrote:
I haven't read the paper, but forests also have a cooling effect
due to transpiration (and can benefit regional rainfall if the
forest is large enough). Also, the soil is much cooler under a
forest than when the forest is cut; not sure what this does beyond
a regional level (i.e. maybe this effect is lost at a global
scale?). Biodiversity losses from natural forests (as opposed to
tree plantations) are another thing to consider, whether they
'count' as ecosystem service losses or some other valuation--e.g.,
without trees, soil erosion and even landslides can occur
(depending on topography and other factors) and result in various
short and long term costs.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jessica Gurevitch
Professor
Department of Ecology and Evolution
Stony Brook University
Stony Brook, NY 11794-5245 USA
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On Wed, Sep 5, 2018 at 2:09 PM, Russell Seitz
<[email protected] <mailto:[email protected]>> wrote:
This is the first article I have seen to economically
formalize how to weigh the climatic and social cost of
agricultural albedo change against the carbons sequestration
and land and crop value benefits of farming and forestry
A the authors note :
"The value of land in both uses is decreased by the warming
impact of albedo
[(14) and (16)]. Carbon sequestration acts as an opposite
force (16). These two
forces also contribute to the optimal timber harvest decision
(17): the clear-
cutting stops the carbon sequestration and releases the
sequestered carbon
with a given time profile, but prevents albedo warming caused
by a dense
forest stand. The relative effect of these forces is
determined by the natural
properties of the stand (stand growth, carbon release from
carbon pools and
the strength of albedo’s warming power), and the prices
assigned to carbon
and albedo. The interplay of the natural processes and the
prices of the
externalities determines the optimal harvesting behavior and
land use."
i intend to alert them to the relevance of their methodology
to other areas of anthopogenic albedo change, algricultural
reservoir albedo included/
On Monday, September 3, 2018 at 10:35:47 AM UTC-4, Andrew
Lockley wrote:
Market-Level Implications of
Regulating Forest Carbon Storage and
Albedo for Climate Change Mitigation
Aapo Rautiainen, Jussi Lintunen, and Jussi Uusivuori
We explore the optimal regulation of forest carbon and
albedo for climate change
mitigation. We develop a partial equilibrium market-level
model with socially
optimal carbon and albedo pricing and characterize optimal
land allocation and
harvests. We numerically assess the policy’s market-level
impacts on land
allocation, harvests, and climate forcing, and evaluate
how parameter choices
(albedo strength, productivity of forest land, and carbon
and albedo prices) affect
the outcomes. Carbon pricing alone leads to an
overprovision of climate benefits
at the expense of food and timber production.
Complementing the policy with
albedo pricing reduces these welfare losses.
Key Words: albedo, carbon, climate, externality, forest,
harvest, land use,
optimization, timber
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