As seen in my Seminole Voice newspaper column a few years back: http://www.seminolevoice.com/news/2014/feb/20/tom-carey-ice-ages-climate-change-and-glacial-milk/
Grade school earth science taught us that rocks get pummeled into smaller bits through freezes and thaws, erosion, wind, and gravity. Eventually reaching the size of bacterially digestible powder, the minerals of the rocks are then released into biologically necessary soil amendments. Usurped by plant roots and incorporated into the living layer on the surface of our planet, we end up with what is known as dirt. Spreading some garden limestone powder over our lawn is a common practice. Let us take this simple landscaping technique and ramp it up to an epic scale.
Ice ages, which send glaciers over vast stretches of our continental landmasses, routinely cycle through our weather patterns in time frames lasting hundreds of thousands of years. The ‘inter-glacial’ period we are now enjoying usually lasts for ten to twelve thousand years. We are now into year eleven thousand of our vacation from the glaciers.
Leading into the ice ages, vast amounts of moisture are deposited onto sheets of ice over the poles by storms brewed in equatorial regions. This ice, recognized as glaciers, slowly moves downhill, grinding the bedrock into smaller pieces. (Liquid water run-off from modern day glaciers is called ‘glacial milk’, and is considered very nutritious.) So much moisture is locked into the glaciers that much of the Earth is very dry; sea levels drop hundreds of feet. As the glacial rock dust spews into the wind, it is spread over the planet, fertilizing the soil, muddying the glaciers, and eventually bringing the ice age to another inter-glacial respite.
What we call ‘global warming’ is merely the precursor to ‘climate change,’ which will be the next glaciation. The human-exacerbated amounts of greenhouse gases in the atmosphere provoke weather responses that we recognize as gradually stronger storms. The near-term of a changing climate will be seen as a warming trend, even melting the Arctic icecap, disrupting weather patterns, dislodging even more violent storms upon a now matured civilization. What we experience as routine weather is merely the calm between the normalcy of severer storms.
Humanity can make a difference in the foregone conclusion of climate cycles by managing the amounts of greenhouse gases stockpiled in the air we breathe. Sequestering carbon by making compost or bio-char is a practice used by many gardeners. Use rock dust fertilizers to emulate the best of a portending disaster. Spread some greensand, (a potassium rich fertilizer), locally mined rock phosphate, limestone, and mineral accumulating seaweed on the garden to accelerate plant growth. We have spurred on our imminently unhappy climate coda, but we can also eschew its eventual outcome.
Weather that only a gardener could love (we hope).