Biogenic VOC emissions

Trees and natural vegetation release air pollutants (biogenic), just like people (anthropogenic).

Figure from a great website by Dr. Wilson from Duke University, with lots of information.

The overall amount of this pollution can be modelled:

http://www.sciencedirect.com/science/article/pii/S1352231005000907

Its important to put this into perspective: human (anthropogenic) emissions of VOCs can be 40 times greater than the highest modelled biogenic emissions.  But the compounds plants produce may be more effective in generating hazardous compound Ozone.  Atmospheric chemistry is complex, and it is ironic that the highest biogenic pollution emissions occur in the same areas that high anthropogenic pollution also occurs, compounding the problem.  

February Blocking Pattern

This computer model (GFS) of near-surface temperature (actually, just above the boundary layer) and atmospheric pressure shows an interesting pattern of high and low pressure areas.  A high pressure region over the Azores is predicted to hold steady for the next several weeks, in effect blocking the normal flow of the jet stream and Eastward-migrating low pressure regions.  These lows are forced to travel (clockwise) all the way around the high pressure region.  The consequence appears to be a trough in the jet stream over Eastern  North America, leading to large incursions of Arctic air, and very, very cold temperatures (see graph).

Current data shows biosphere carbon uptake holding steady

One of the biggest questions for ecosystem scientists is the degree to which terrestrial and marine ecosystems  can continue to sequester carbon in the face of continuing human emissions of CO2 and accompanying global climate change.

This is one of the best (i.e. easiest to interpret) graphs to show that the fraction of emitted CO2 remaining in the atmosphere (i.e. not sequestered) has held steady at around 50% for the last 40+ years (purple line, "Airborne Fraction").  Data Sources: Fossil fuel CO2 emissions - Land use CO2 emissions -  Airborne CO2 levels Graph by Willis Eschenbach.

Similar conclusions were reached by the National Oceanic and Atmospheric Administration’s Earth System Research Laboratory in Boulder, Colorado last year.

Best Periodic Table Ever

I've been on the lookout for the best periodic table for a couple months now, and have finally found it. Various versions can be downloaded here. An explanation of the new format.

Sunspots, Space Weather, and the Earth

Prikryl et al 2009: Solar magnetic sector boundary passage (SBP) and vorticity area index (VAI), by weather reconstruction ERA-40 dataset back to 1963-2002, confirmed the "Wilcox effect". The interplanetary magnetic field and associated "space weather" directly effect Earth's weather.

News from Dr. Leif Svalgaard at Stanford:

Wolf was right...we can use magnetic field strength to calibrate solar irradiance. The correlation between solar far-UV radiation and geomagnetic force on the Earth's surface is extremely good;

now we have an objective calibration for sunspot number.
The conclusion? Leif 2007 finds no long-term trend in solar irradience from at least 1600. through the present.

Planetary Boundaries: Safe Operating Space

More information:

+http://www.nature.com/nature/journal/v461/n7263/fig_tab/461472a_F1.html

+http://planetsave.com/2010/04/12/nine-%E2%80%98planetary-boundaries%E2%80%99-cited-as-crucial-for-human-survival/

+http://postgrowth.org/safe-operating-limits/

+http://www.stockholmresilience.org/research/researchnews/planetaryboundariespresentedattedglobal2010.5.40d64f1b129b2c781e0800098.html

Choose Life

"Two paths lie before us. One leads to death, the other to life.

If we choose the first path—then we in effect become the allies of death, and in everything we do our attachment to life will weaken: our vision, blinded to the abyss that has opened at our feet, will dim and grow confused; our will, discouraged by the thought of trying to build on such a precarious foundation, will slacken; and we will sink into stupefaction, as though we were gradually weaning ourselves from life in preparation for the end.

On the other hand, if we reject our doom, and bend our efforts toward survival-then the anesthetic fog will lift: our vision, no longer straining not to see the obvious, will sharpen; our will, finding secure ground to build on, will be restored; and we will take full and clear possession of life again. "


Schell, Jonathan. Fate of the Earth.