A great article discussing how local action can make an impact on broader regional and global climate. And simultaneously a story about how the news and media ecosystem impacted how we think about climate change. #climatechange #longreads https://kolektiva.social/@504DR/113100135955416496
kolektiva.social504 Battery Dr (@504DR@kolektiva.social)Regular readers of my posts know I'm always going on about how we're destroying the life sustaining systems of the planet.
Here is someone who figured that out decades ago, who has the science and credentials to not only back it up, but to make him renowned in the serious circles of the climate change world.
He explains it much better than I ever could.
______________
Millan Millan and the Mystery of the Missing Mediterranean Storms
By Rob Lewis, originally published by Resilence.org
July 17, 2023
Spanish maqui scrubland
...
Millan is a highly technical and practical scientist, steeped in physics and with an engineer’s stamp. Yet he turns poet when describing how soil, water and plants all work together to recycle water, employing the tercet: water begets water, soil is the womb, vegetation is the midwife.
What he means by water begets water is that healthy landscapes seem to grow water. Of course, water just can’t be created. There’s a set amount on earth, and though we think of it as spread amongst oceans, lakes, rivers and glaciers, it is also inside living things. Humans are 60% water, birds 75%, fish 70 to 84%. A typical cat weighs in at 67%, while plants and trees are almost entirely water, 80 to 90%. How much water a landscape can hold is therefore proportional to how much life is in the landscape and soil to hold what arrives in periodic pulses from major water bodies, like oceans and lakes, via atmospheric currents. This water, once held, is transpired by vegetation back into the atmosphere as vapor to make clouds and future rain. Like this, the same water is recycled over and over, up and down, across landscapes. Though it used to be thought that virtually all inland water came from large water bodies and atmospheric circulations, it’s now realized that 40-60% of most rain comes via this recycling, increasing the farther inland you go. It’s called the small water cycle, and in some places, like the Amazon, it is responsible for 80% of the rain. The more life in a landscape, the more water it can “milk” from ocean flows. It’s a self-amplifying circle: water, through life, begetting more water, begetting yet more life, gathering yet more water, and around it goes, the result being increased climate cooling and moderation.
Soil is the womb because it holds the water. But here again it is really life holding the water, the rich below-ground microbial community which makes the difference between compacted, water-repellent dirt and clumpy absorptive soil. Picture soil as a sponge, held together but full of tiny cavities. There are grains of sand, clay, and minerals within that matrix, but what binds them into a sponge is life, an astounding plethora of the invisible and nearly invisible: protists and bacteria, nematodes and soil mites, and up to eight miles per square inch of fungal hyphae. It is their exudates and decaying bodies which not only glue the particles together, but hold them apart, making room for the water so crucial to all life. When it’s all working together, a very fortuitous feedback loop appears—the more carbon in the soil, the more water the soil can hold. The more water in the soil, the more vegetation it can grow. The more vegetation it can grow, the more moisture it feed the sky and the more carbon it draws down into life and soil. It’s a virtuous cycle, “begetting” water, sequestering carbon, unseen and underground, womb-like.
Vegetation is the midwife because it delivers the water to the atmosphere as vapor, where it rises, condenses, and falls again as rain. But vegetation doesn’t only send up water vapor, it also delivers the seeds of future rain drops, called cloud condensation nuclei. These are microscopic grains of various biota, such as bacteria, fungal spores, and released vapors, all of which have uniquely low freeze thresholds, hastening the vapor’s condensation from vapor to water and its subsequent return to land as rain. The vegetation sending up the water is also bringing it back down in another virtuous, self-amplifying cycle.
...
The reference to “more recent times” is even more interesting. After noting that the traditional peoples of the area—the Tuareg nomads, the Haussaand farmers and Fulani pastoralists— “had developed social, economic, political, and land use systems which enabled their survival within the constraints imposed by the environment of the area,” they describe how “European colonization introduced and imposed a variety of social and economic changes, which…disrupted the symbiotic relationships which had developed between socio-economic groups of the region. Among the measures introduced were the encouragement of the pastoralists to lead sedentary lives and the introduction of the cash crop economy. The expansion of cultivated areas took place at the expense of the more southerly and thus better watered grazing lands; fallow land was reduced; while much of the bushland, which was traditionally part of the pastoralists grazing land, was incorporated into the agricultural area.”
Today’s climate narrative typically blames Saharan droughts on CO2 emissions, but these authors clearly had land-use in their sites, pointing to “overgrazing of the deserts and their margins,” and “the driving back of the nomads from parts of the steppes (leading) to degradation of the sparse vegetation cover in the surrounding semi-deserts on the one hand, and to disturbance of the ecological balance of the cultivated steppes on the other. Serious consequences also resulted from the ploughing of dry soils in particular.”
...
Full article:
https://www.resilience.org/stories/2023-07-17/millan-millan-and-the-mystery-of-the-missing-mediterranean-storms/