The natural science that studies matter, energy, and their interactions, forming the basis of climate models.Physics is the natural science that studies matter, energy, and their interactions, from the smallest subatomic particles to the largest cosmic structures. It provides the fundamental laws that govern everything from the motion of planets to the behavior of electrons in a semiconductor. In the context of climate models, physics supplies the equations of fluid dynamics, thermodynamics, and radiation transfer that describe how the atmosphere, oceans, and ice respond to energy inputs.
Physics as a modern science emerged in the 17th century with Isaac Newton's laws of motion and universal gravitation. The field expanded through the 19th century with thermodynamics and electromagnetism, and in the 20th century with relativity and quantum mechanics.
Physics works by identifying universal principles—such as conservation of energy, momentum, and charge—and expressing them as mathematical equations. These equations can be solved exactly for simple systems or approximated numerically for complex ones. In climate modeling, the Navier-Stokes equations for fluid flow are coupled with radiative transfer equations to simulate the Earth's energy balance, while statistical mechanics connects microscopic molecular behavior to macroscopic temperature and pressure.
Physics underpins virtually all modern technology, from smartphones and GPS to medical imaging and renewable energy systems, and is the foundation of climate modeling used to project future warming.
The equations of fluid dynamics used in climate models are the same ones that describe the flow of crowds in a stampede, as explored in the article 'Толпа как жидкость'.
