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 …
More than twenty years ago, a biological regulation of climate was proposed whereby emissions of dimethyl sulphide from oceanic phytoplankton resulted in the formation of aerosol particles that acted as cloud condensation nuclei in the marine boundary layer. In this hypothesis—referred to as CLAW—the increase in cloud condensation nuclei led …
This document contains the presentation by Sagnik Dey, Centre for Atmospheric Sciences, Indian Institute of Technology Delhi on “Aerosol-Cloud-Climate Interaction: A Case Study from the Indian Ocean” during Second National Research Conference on Climate Change, organized by the Centre for Science and Environment, IIT Delhi and IIT Madras on November …
This document contains the presentation by S. Das et al, Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai and University of Iowa, Iowa City, USA on “Data assimilation using optimal interpolation: Correcting chemical transport model predictions with satellite observations” during Second National Research Conference on Climate Change, organized …
A recent surge in the intensity of tropical cyclones in the Arabian Sea has brought unprecedented damage and loss of life. Anthropogenic air pollution might be increasing the destructiveness of these storms.
Throughout the year, average sea surface temperatures in the Arabian Sea are warm enough to support the development of tropical cyclones1, but the atmospheric monsoon circulation and associated strong vertical wind shear limits cyclone development and intensification, only permitting a pre-monsoon and post-monsoon period for cyclogenesis. Thus a recent increase …
This paper reports the atmospheric concentrations of PM2.5 and PM1 mass, water soluble inorganic components and their seasonal variations measured between the period of July 2009 and June 2010 in Durg city (20°23' to 22°02'N and 80°46' to 81°58'E), India.
Read this indepth review by Stockholm Environment Institute of new developments in climate economics and science since the Stern Review (2006) and the Intergovernmental Panel on Climate Change’s Fourth Assessment Report (2007). Economic analysis has become increasingly central to the climate policy debate, but the models and assumptions of climate …
For the first time in India, scientific tests will be conducted on the Himalayan glaciers in Uttarakhand to measure the impact of carbon soot on glaciers. Scientists from Indian Space Research Organisation, Uttarakhand Space Application Centre and Space Physics Laboratory, Thiruvananthapuram, will conduct these tests slated to begin September 24, …
We review the sea-level and energy budgets together from 1961, using recent and updated estimates of all terms. From 1972 to 2008, the observed sea-level rise (1.8 ± 0.2 mm yr−1 from tide gauges alone and 2.1 ± .2 mm yr−1 from a combination of tide gauges and altimeter observations) …
Manufactured nanomaterials (MNs) are commonly considered to be commercial products possessing at least one dimension in the size range of 10−9 m to 10−7 m. As particles in this size range represent the smaller fraction of colloidal particles characterized by dimensions of 10−9 m to 10−6 m, they differ from …
Dust has the potential to modify global climate by influencing the radiative balance of the atmosphere and by supplying iron and other essential limiting micronutrients to the ocean. Indeed, dust supply to the Southern Ocean increases during ice ages, and ‘iron fertilization’ of the subantarctic zone may have contributed up …
The present article provides a brief overview of Indian Network for Climate Change Assessment (INCCA) which is a new initiative of the Ministry of Environment and Forests. It has been visualized as a network of institutions countrywide and is designed to undertake a range of activities in the area of …
Dust is all that's needed to plunge the world into an ice age. When blown into the sea, the iron it contains can fertilise plankton growth on a scale large enough to cause global temperatures to drop. The finding adds support to the idea of staving off climate change by …
Satellite-based estimates of the aerosol indirect effect (AIE) are consistently smaller than the estimates from global aerosol models, and, partly as a result of these differences, the assessment of this climate forcing includes large uncertainties. Satellite estimates typically use the present-day (PD) relationship between observed cloud drop number concentrations (Nc) …
MONITORING air pollution just got simpler. A handy and low-cost instrument has been developed for researchers to measure and analyse soot level in the air. Soot, or black carbon, is the second biggest contributor to global warming after carbon dioxide. It is released in the air by incomplete combustion of …
Remote lakes are usually unaffected by direct human infl uence, yet they receive inputs of atmospheric pollutants, dust, and other aerosols, both inorganic and organic. In remote, alpine lakes, these atmospheric inputs may infl uence the pool of dissolved organic matter, a critical constituent for the biogeochemical functioning of aquatic …
Whether salt crystals, spores or sulphates: aerosols have an influence on the yield and performance of solar thermal power plants that should not be underestimated.
Efforts to limit climate change generally focus on reducing carbon dioxide emissions caused by burning fossil fuels. However, another byproduct of fossil fuel combustion is black carbon, a major component of soot. Sources include diesel truck and car engines as well as wood fires, kilns, and stoves. Particles of black …
Trace greenhouse gases are a fundamentally important component of Earth’s global climate system sensitive to global change. However, their concentration in the pre-Pleistocene atmosphere during past warm greenhouse climates is highly uncertain because we lack suitable geochemical or biological proxies. This long-standing issue hinders assessment of their contribution to past …
The government has launched an initiative to study the phenomenon of black carbon, commonly known as soot. Black carbon is a form of particulate air pollution, produced from incomplete combustion from biomass burning, cooking with solid fuels, and diesel exhaust. Over the last few years there has been a concerted …
