The Intergovernmental Panel on Climate Change (IPCC), Assessment Report 6 (AR6), stated that the recent climate change is “widespread, rapid, intensifying and unprecedented in thousands of years.” It is further noted: “Climate change is already affecting every region on Earth in multiple ways. The changes we experience will increase with …
aerosols are mitigating the effects of global warming over the South Asian region, including India. This was the finding of a new study conducted by researchers from the Pune-based Indian Institute of Tropical Meteorology (iitm) and San Diego-based Scripps Institution of Oceanography. The study proves that though India's summer temperatures …
A comprehensive, spatially resolved (0.25°×0.25°) fossil fuel consumption database and emissions inventory was constructed, for India, for the first time. Emissions of sulphur dioxide and aerosol chemical constituents were estimated for 1996–1997 and extrapolated to the Indian Ocean Experiment (INDOEX) study period (1998–1999). District level consumption of coal/lignite, petroleum and …
Radiative effects of anthropogenic changes in atmospheric composition are expected to cause climate changes, in particular an intensification of the global water cycle with a consequent increase in flood risk. But the detection of anthropogenically forced changes in flooding is difficult because of the substantial natural variability, the dependence of …
aerosols may be the culprits weakening the Earth's water cycle by reducing rainfall. This was discovered during a study conducted by researchers at the Scripps Institution of Oceanography, University of California, San Diego, usa. According to the researchers, the tiny aerosols that are primarily made up of black carbon could …
Human activities are releasing tiny particles (aerosols) into the atmosphere. These human-made aerosols enhance scattering and absorption of solar radiation. They also produce brighter clouds that are less efficient at releasing precipitation. These in turn lead to large reductions in the amount of solar irradiance reaching Earth's surface, a corresponding …
Every year, from December to April, anthropogenic haze spreads over most of the North Indian Ocean, and South and Southeast Asia. The Indian Ocean Experiment (INDOEX) documented this Indo-Asian haze at scales ranging from individual particles to its contribution to the regional climate forcing. This study integrates the multiplatform observations …
black carbon aerosol pollution, produced by humans, can impact global climate as well as seasonal cycles of rainfall shows new research based upon satellite data and a multi-national field experiment. Aerosols that contain black carbon both absorb and reflect incoming sunlight, therefore they can exert a regional cooling influence on …
The most visible impact of air pollution is the haze, a brownish layer of pollutants and particles from biomass burning and industrial emissions, that pervades most regions in Asia. A recent international study, the Indian Ocean Experiment (INDOEX), has revealed that this haze is transported far beyond the source region, …
Latitudinal distribution of radiative flux at different layers has been measured for the first time over the Indian Ocean from 15°N to 20°S during intensive field phase of INDOEX 1999. Simultaneously measurements have been made over three Indian ground stations, viz. Delhi, Pune and Trivandrum. The basic feature of radiative …
Measurements and models show that enhanced aerosol concentrations can augment cloud albedo not only by increasing total droplet cross-sectional area, but also by reducing precipitation and thereby increasing cloud water content and cloud coverage. Aerosol pollution is expected to exert a net cooling influence on the global climate through these …
microscopic particles of atmospheric dust, sea salt and smoke known as aerosols are essential to the formation of clouds and the production of rain and snow. But recent years have also seen a new source of aerosols
This document contains the summary for Policymakers: The Science of Climate Change - IPCC Working Group I. It details the following key features: 1. Greenhouse gas concentrations have continued to increase 2. Anthropogenic aerosols tend to produce negative radiative forcings 3. Climate has changed over the past century 4. The …
SULPHATE aerosols are not all bad. Meteorologists now say tharsulphate aerosols help mitigate global warming. Researchers from the UK Meteorological Office's Hadley Centre have developed a computer model that simulates the way in which aerosols mitigate Predicted (1860-2050) and observed the process of global warming. The scientists claim that the …
A proper inventory of atmospheric emissions from natural sources is basic to our understanding of the atmospheric cycle of the trace metals (and metalloids), and is also needed for assessing the extent of regional and global pollution by toxic metals1. It is generally presumed that the principal natural sources of …
