一个推到真相:原子保护作为大气组成模型中的严格约束,使用物种加权校正
Patrick Obin Sturm1, Sam J Silva1,2,3
1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, United States.
概括
这项研究引入了一种新的方法,以确保大气模型保留原子,提高物理一致性. 一种加权校正方法提高了准确性,特别是在关键的低度物种,如激素.
科学领域:
- 大气化学和大气模型
- 计算科学和数值方法.
背景情况:
- 大气组成的计算模型往往缺乏物理一致性,无法保存像原子这样的基本量.
- 现有的模型可能会忽略微小的非物理偏差,依靠小的调整来保持质量保存.
研究的目的:
- 开发一种方法,将数值模型预测与物理一致的硬约束联系起来,确保原子的保存.
- 引入一种模型不可知的校正技术,最小地扰乱到最近的物理有效解决方案的预测.
主要方法:
- 引入了一个封闭形式的,模型不可知的校正,使用单个矩阵运算来强制执行原子保存.
- 训练了一个渐变增强决策树组合来模拟臭氧光化学,并测试了校正的影响.
- 开发了一种物种加权扩展,以考虑不确定性和大小,对于低度物种至关重要.
主要成果:
- 基本的推动方法对大多数物种的干扰最小,但对重要的氧化剂和激素的准确性降低.
- 按物种加权的校正稍微提高了整体准确性,通过将非物理预测调整为保存质量的解决方案.
- 权重校正被证明对于准确预测关键的低度物种,如激素,至关重要.
结论:
- 拟议的推动方法有效地将大气模型预测与物理约束联系起来,确保原子的保存.
- 按物种加权的方法对于保持准确性至关重要,特别是对于反应性物种,从而提高模型可靠性.
相关概念视频
Conservation of Mass in Fixed, Nondeforming Control Volume
879
The principle of conservation of mass is fundamental in fluid dynamics and is crucial for analyzing flow within fixed control volumes, such as pipes or ducts. This principle states that the total mass within a control volume remains constant unless altered by the inflow or outflow of mass through the control surfaces. This results in a vital relationship for steady, incompressible flow where the mass entering a system equals the mass leaving it.
In the case of a sewer pipe, which can be modeled...
In the case of a sewer pipe, which can be modeled...
879
Conservation of Mass in Moving, Nondeforming Control Volume
749
Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
749
Conservation of Mass in Finite Cotrol Volume
935
The principle of conservation of mass is a fundamental law in fluid mechanics and is applied using the continuity equation. We apply the concept to a finite control volume to derive the continuity equation.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.
935
Equation of State
1.6K
The equation of state is an equation that relates physical quantities, such as pressure, volume, temperature, and the number of moles, of a thermodynamics system with each other. The equation relating physical quantities with each other can be a simple mathematical expression or too complicated to express in mathematical form. In either case, a relationship between physical quantities exists. If the equation of state cannot be expressed in a mathematical form, then experimental data and...
1.6K
Clausius-Clapeyron Equation
55.7K
The equilibrium between a liquid and its vapor depends on the temperature of the system; a rise in temperature causes a corresponding rise in the vapor pressure of its liquid. The Clausius-Clapeyron equation gives the quantitative relation between a substance’s vapor pressure (P) and its temperature (T); it predicts the rate at which vapor pressure increases per unit increase in temperature.
55.7K
Dalton's Law of Partial Pressure
1.3K
The partial pressure of a gas is a measure of the thermodynamic activity of the gas's molecules. The pressure that a gas would create if it occupied the total volume available is called the gas's partial pressure. If two or more gases are mixed together in a container, the molecules move randomly and collide with each other, causing them to reach thermal equilibrium. When the gases have the same temperature, their molecules have the same average kinetic energy. Thus, each gas obeys the...
1.3K


