Sensible heat.

It seems there is a betrayal somewhere that we need to understand. Without recognizing it, we will live in error and provide only partial or ineffective solutions to mitigate climate change. 

Is carbon dioxide the only primary culprit in climate change mitigation? Let us look at it from another angle so that we do not see only what we want to see. We need a fresh look at the thermal regime of the planet Earth.

There is one crucial connection that has escaped scientists. The state of water in the atmosphere changes depending on how we humans manage our land. 

If we drain the landscape, we weaken its natural air conditioning system, which stops working because there is less water in the local watershed. If water is not retained in the ecosystem, the natural cooling system cannot regulate the heat. 

 Here is a comparable example. Picture the car radiator. The radiator converts the heat from the fluid inside to the air outside, thereby cooling the fluid. The reduced temperature fluid cools the engine in turn. Suppose the radiator gets punctured. The damage will cause the water leak, and the car engine gets overheated and loses its function.

What is the solution?

Water is present not only in the car radiator but also in the small water cycles. Water in the small water cycles draws the heat away from the Earth’s surface, and this heat (latent heat) is released at the dew point after the condensation of water vapor and heats the colder layers of the atmosphere. This thermal energy exchange is an example of the Law of energy conservation and the Second thermodynamic theorem at work. This author would like to remind the fact that every cubic meter of evaporated water transports 700 kWh of heat.

Latent heat.

Suppose we drain the cubic meter of rainwater as inconvenient stormwater instead of leaving it in the ecosystem, giving it a chance to evaporate locally. Stormwater eventually makes its way into the sea, yet 700 kWh of its heat per cubic meter remains in the troposphere and contributes to its overheating. (We call this the sensible heat).

We know from the physical nature of the Earth’s energy flows that once the Sun rays reach the Earth’s surface, they transform into either the latent heat provided there is a sufficient amount of water, or the sensible heat should the ecosystem lacks water. Carbon dioxide is not relevant to this physical principle of energy flows.

What are we humans doing with water on the Earth’s surface? Well, terrible things. 

Wetlands reduction, corrupt agricultural practices, and negligent stormwater management reduce the watershed and cause the landscape to dry up.

We consider the rainwater to be an inconvenient waste and dispose of it anytime the rain falls on the ground.

Municipalities drain stormwater away in an attempt to keep the urban areas dry. What are the cause and the outcome of such practice? Eventually, they have to deal with the heat waves in their cities due to diminished watershed. It is time to consider data (please note that this article was initially published in 2001). Urban and real estate development is annually responsible for 57,000 km2 global runoffs.

In the pursuit of food supplies, people cut annually about 127,000 km2 of forests and convert them into arable land. Corrupt agricultural practices cause an annual drying up of over 200,000 km2 of farming land. 

To illustrate the point, this author analyzed the hydrological regime changes in Slovakia and appraised the rain runoff in Slovakia, amounting to 250 million cubic meters.

An enormous amount of water once abundant in the small water cycles in that region now drains away in sewage infrastructure. For comparison, Slovakia is a country in Central Europe with an area of 50,000 km2 (19,305 square miles, approximately the combined size of Vermont and New Hampshire).

Based on this research, we can determine that people worldwide drain away 760 cubic kilometers of rainwater from the continents annually. We are talking about 760,000,000,000 m3.

Stormwater runoff makes its way ultimately to the sea. This vast amount of water was previously circulating in the regional ecosystems, where small water cycles used to recycle it: water seeped into the soil, promoted photosynthesis, bound carbon to biomass and soil, evaporated, formed clouds, and subsequently formed rain in that region.

That’s a lot of water! Let that sink in. Excuse the pun.

A direct impact of the sewerage of 760 km3 of rainwater into the oceans will increase the ocean levels by 2.1 millimeters. The annual draining of 760 km3 of water into the oceans means that every decade the 2.1 cm rise in ocean levels is due to runoff, and in 50 years, it will be more than 10 cm. Without any consideration, people are mindlessly getting rid of water from the continents and creating a water shortage, food crisis as well as the climate change crisis. Please read the full science behind this article in the New Water Paradigm -Water For The Recovery of Climate, initially published in 2007 (www.waterparadigm.org).

Climate change models need to include a global rainwater runoff volume reduction in their assumptions. Why? The annual incremental increase in heat due to draining the continent river basins via sewage systems exceeds 500 thousand TWh. The existing climate scenarios do not include such calculations.

To provide an analogy, the Slovak Republic’s power plants supply its five million citizens with 22 TWh annually. It is time for climate scientists and climate activists to augment their observations and update the climate models. 

IPCC report states, for example, that global warming of 2°C would lead to an expansion of areas with significant increases in runoff and those affected by flood hazards. True. What if we looked at it from another point of view: What if the existing runoffs contribute to global warming all along?

Integrated river basin management practices will help to restore the natural water cycles and recover the climate.

Climate skeptics admonish the climate activists for misrepresenting the cause of global warming. Why give them the reason to do nothing and bring us to ruin, while our planet keeps overheating?  

532 000 TWh of latent heat is transported at the dew point after condensation of water vapor and heats the colder layers of the atmosphere.

Let us restore the Small Water Cycles!

It is possible to cool the hot world.

Copyright: © 2020, Michal Kravčík,

Translated by: Zuzana Mulkerin, Photos by: Michal Kravčík, Dušan Lukášik

Reference information: New Water Paradigm – Water for the Recovery of the Climate, 2007, www.waterparadigm.org