Greenhouse gas concentrations in the atmosphere hit new record highs in 2022, with no end in sight to the rising trend, according to this new report by the World Meteorological Organisation (WMO). This Bulletin represents the latest analysis of observations from the WMO GAW Programme. It shows globally averaged surface …
Nitrous oxide (N2O) is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. Anthropogenic nitrogen (N) loading to river networks is a potentially important source of N2O via microbial denitrification that converts N to N2O and dinitrogen (N2). The fraction of denitrified N that escapes as …
Biomass burning is an important source of greenhouse gas emissions, most importantly carbon dioxide (CO2). In this study, we used burnt area estimates derived from the L3JRC product to estimate the CO2 emissions from forests. The results suggested than an average of 2,414 sq.kms is burnt annually.
Fire plays important role in shaping ecosystem structure and function. Depending upon the complex effects of fire, it can have either beneficial or harmful effects. In this article, we briefly review the potential of satellite remote sensing data for mapping and monitoring vegetation fires.
Distributions and climate impacts of biomass-burning aerosols were simulated by a global aerosol climate model, SPRINTARS, which was fully coupled to a general circulation model. The model included calculations of the direct, semi-direct and indirect effects of aerosols.
Nitric oxide reductase (NOR) is an iron-containing enzyme that catalyzes the reduction of nitric oxide (NO) to generate a major greenhouse gas, nitrous oxide (N2O). Here, we report the crystal structure of NOR from Pseudomonas aeruginosa at 2.7 angstrom resolution. The structure reveals details of the catalytic binuclear center. The …
Dozens of helicopters are whirring above Florida's valuable and sensitive veggie crops, an unusual approach by farmers worried that an uncommon freeze could wipe out their harvests. They hover low over green bean and sweet corn fields, moving back and forth in the early morning hours to push warmer air …
Pune The Ministry of Earth Sciences has requested the state government to part with 17 gunthas of land in Mahabaleshwar for its cloud-seeding project, for which it had got a green signal early in the year. City-based Indian Institute of Tropical Meteorology (IITM), which will be operating the centre, is …
BETWA SHARMA CANCUN As delegates strug gle to arrive at a consensus on key climate change issues at the annual climate change conference in Cancun, the World Meteorological Organisation has released a report which says 2010 is the hottest year ever recorded. "The year 2010 is almost certain to rank …
Meena Menon January-October 2010 temperatures are near record levels Surface air temperatures over land were above normal across most parts of the world CANCUN: The year 2010 is almost certain to rank in the top three warmest years since the beginning of instrumental climate records in 1850, according to data …
The Ozone Secretariat has released a report of the Environmental Effects Assessment Panel, titled "Environmental Effects of Ozone Depletion and its Interactions with Climate Change: 2010 Assessment." The report outlines the interactions between climate change and the ozone layer, including changes in atmospheric conditions that affect the chemical production and …
WHILE harnessing wind energy could satisfy growing demand for electricity and reduce emissions of greenhouse gases, turbulence from wind turbines could affect the growth of surrounding crops, US researchers said. Led by atmospheric sciences professor at University of Illinois, Somnath Baidya Roy, the researchers suggest careful placement of windfarms. Roy …
Impact of black carbon on climate by J.Srinivasan, Divecha Centre for Climate Change, Indian Institute of Science, Bangalore presented at the South Asian Media Briefing on Climate Change, CSE, India Habitat Centre, New Delhi, 24
Transient eddies in the extratropical storm tracks are a primary mechanism for the transport of momentum, energy, and water in the atmosphere, and as such are a major component of the climate system. Changes in the extratropical storm tracks under global warming would impact these transports, the ocean circulation and …
Emissions of a broad range of greenhouse gases of varying lifetimes contribute to global climate change. Carbon dioxide displays exceptional persistence that renders its warming nearly irreversible for more than 1,000 y. Here we show that the warming due to non-CO2 greenhouse gases, although not irreversible, persists notably longer than …
Organic aerosol particles are ubiquitous in the atmosphere. In forests, such particles can occur in solid form — a finding that will lead to a re-evaluation of how they are formed, and their properties and effects.
Secondary organic aerosol (SOA) particles are formed in the atmosphere from condensable oxidation products of anthropogenic and biogenic volatile organic compounds (VOCs). On a global scale, biogenic VOCs account for about 90% of VOC emissions and of SOA formation (90 billion kilograms of carbon per year). SOA particles can scatter …
New Delhi: Does the winter fog carry deadly antibiotic resistant germs? Is it safe for patients suffering from HIV or TB to travel during winter in India? Is the fog around a hospital more dangerous, if at all, than that enveloping an airport? In a first-of-its-kind study in the country, …
New Delhi: Worried over rain playing spoilsport in the run-up to the Games, the government on Monday asked the Govt seeks daily weather updates Indian Meteorological Department (IMD) to provide weather updates on daily basis. Such is the importance of good weather that it found more than a mention at …
