Causes and effect of haze

Observing moisture haze Haze refers to a light cloud of fine particles that consequently reduces visibility.

Causes and effect of haze

The impact on ecosystem, however, is not clearly understood. This study investigates the effect of regional haze pollution on the yields of rice and wheat in China. The spatial and temporal distributions of aerosol optical depth AOD show high particulate pollution in the North China Plain region, Yangtze River Delta region, the central eastern China, and the Si Chuan Basin, coexisted largely with crop growth in time and space.

However, there are large uncertainties of the estimate related to the diffuse solar radiation. A further detailed study is needed to clearly understand this effect to meet the growing food demand in the nation in the coming decades. Over the last 30 years, rapid urbanization and economic development in China have led to an increase in air pollution 1.

In particular, particulate pollution is a serious environmental problem, with PM2.

Associated Data

The heavy aerosol pollutions have led to many environmental problems in China, such as human health, visibility and regional climate, which have been extensively studied 1378.

However, the effects on ecosystem, such as the crop production, have not been systematically studied due to lack of measurements of horizontal and temporal distribution of aerosol in China.

In this study, we first investigated the spatial and temporal distribution of aerosol in China using the satellite measurement results of the Moderate Resolution Imagine Spectroradiometer MODIS aboard Aqua satellite. A state-of-the-art Tropospheric Ultraviolet-Visible TUV model was then applied to calculate the reduction of the solar radiation due to the scattering and absorbing of aerosol particles.

Filed experimental measurements of the relationship between the solar radiation and crop yields 91011121314 were used to estimate the effect of aerosols on the reductions of rice and wheat net yields in China. However, there are large uncertainties for estimating the effect of solar radiation on crop production, which related to the diffuse solar radiation Canopy photosynthesis tends to be significantly more light-use efficient under diffuse solar radiation than under direct solar radiation The uncertainties of diffuse solar radiation on the net yield of crop are studied under different diffuse radiation cases.

Results and Discussion Figure 1 shows the horizontal distributions of aerosol optical depth AOD which is a measure of the extinction of solar radiation by aerosol. These AOD values 0. This is consistent with ground-based observations which show that the hr integrated PM2.

Such high aerosol concentration can cause significant reduction of solar radiation to the surface, which in turn may affect the photosynthesis of plants.The Causes of Heart disease Many of you have heard that people have passed away from heart disease and that they have someone in their family that is suffering from this Words 3 Pages.

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Health Effects of Haze (and How You Can Protect Yourself) Learn the health impact of haze and what you can do to protect you and your loved ones.

Causes and effect of haze

Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog..

Since , haze . causes, nature and extent of land and/or forest fires and the resulting haze, to prevent and control the sources of such land and/or forest fires and the resulting haze by applying environmentally sound policies, practices and.

Essay cause and effect of haze