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 …
The fact that water vapor is the most dominant greenhouse gas underscores the need for an accurate understanding of the changes in its distribution over space and time. Although satellite observations have revealed a moistening trend in the upper troposphere, it has been unclear whether the observed moistening is a …
The recent decade has seen an exceptional number of boreal summer weather extremes, some causing massive damage to society. There is a strong scientific debate about the underlying causes of these events. We show that high-amplitude quasi-stationary Rossby waves, associated with resonance circulation regimes, lead to persistent surface weather conditions …
Dissolved iron is an essential micronutrient for marine phytoplankton, and its availability controls patterns of primary productivity and carbon cycling throughout the oceans. The relative importance of different sources of iron to the oceans is not well known, however, and flux estimates from atmospheric dust, hydrothermal vents and oceanic sediments …
Several large and rapid changes in atmospheric temperature and the partial pressure of carbon dioxide in the atmosphere—probably linked to changes in deep ocean circulation—occurred during the last deglaciation. The abrupt temperature rise in the Northern Hemisphere and the restart of the Atlantic meridional overturning circulation at the start of …
SURAT: Surat City Climate Change Trust (SCCT) will chalk out a definite strategy to tackle major challenges of reduction of greenhouse gas emission, pollution and atmospheric heat. "We are the only city in India to be included in the Rockefeller Foundation (RF) list of top 100 resilient cities of the …
The US space agency is to launch today a satellite that tracks atmospheric carbon dioxide, a leading greenhouse gas that contributes to global warming. The launch of the Orbiting Carbon Observatory-2 is expected at 2:56 am Pacific time from Vandenberg Air Force Base in California. “Now that humans are acknowledging …
We report the initial results of the methane flux measured using eddy covariance method during summer months from the world’s largest mangrove ecosystem, Sundarbans of India. Mangrove ecosystems are known sources for methane (CH4) having very high global warming potential. In order to quantify the methane flux in mangroves, an …
The temporal and spatial variability of the various meteorological parameters over India and its different subregions is high. The Indian subcontinent is surrounded by the complex Himalayan topography in north and the vast oceans in the east, west and south. Such distributions have dominant influence over its climate and thus …
Australia maintained an El Nino alert as indicators of the event, which can bring drought to the Asia-Pacific region and heavier-than-usual rains to South America, begin to emerge before the pattern develops in coming months. Climate models indicate the weather event is likely to develop by spring, which starts in …
A Bill to establish a task force to review policies and measures to promote, and to develop best practices for, reduction of short-lived climate pollutants, and for other purposes. See also: Bipartisan team to introduce Super Pollutants Act to cut HFCs, black carbon, methane http://www.indiaenvironmentportal.org.in/content/bipartisan-team-introduce-super-pollutants-act-cut-hfcs-black-carbon-methane Primer on Hydrofluorocarbons http://www.indiaenvironmentportal.org.in/reports-documents/primer-hydrofluorocarbons-0 Primer …
The President shall establish an interagency task force on short‐lived climate pollutant mitigation, whose members will consist of the secretaries/administrators/chairmen of all relevant federal regulators and cabinet agencies (or their designated representatives), including EPA, DoD, Interior, Energy, Commerce, State, Transportation, and Agriculture. See also: Bipartisan team to introduce Super Pollutants …
The researchers investigate the balance between two mechanisms that remove carbon from the atmosphere and oceans over long timescales—weathering of terrestrial silicates and alteration of the ocean floor. We show that this balance should strongly influence atmospheric oxygen concentration, since it dictates the delivery rate of the ultimate limiting nutrient …
Poor air quality causes an estimated 2.6–4.4 million premature deaths per year. Hazardous conditions form when meteorological components allow the accumulation of pollutants in the near-surface atmosphere. Global-warming-driven changes to atmospheric circulation and the hydrological cycle are expected to alter the meteorological components that control pollutant build-up and dispersal, but …
The world’s meteorologists and climate experts are watching closely for another burst of westerly winds across the Pacific that could trigger the first El Nino weather pattern since 2009-2010. “Basically it is primed for a strong El Nino, but it needs the final push,” said Axel Timmermann, the professor of …
Australia's weather bureau said on Tuesday the chance of an El Nino forming over the next few months remains at 70 percent, though the agency said some key indicators associated with the weather pattern had eased in recent weeks. "We still believe an El Nino is likely," Andrew Watkins, Supervisor …
The city witnessed high pollution last weekend as the concentration of particulate matter (PM10) suspended in the atmosphere exceeded the permissible limit of 100 micro grams per cubic metre. While the PM10 level increased to over 600 micro grams per cubic metre several times on Saturday, it crossed 800 on …
An El Nino weather pattern may be established by August as Australia remains on alert for the event that brings drought to the Asia-Pacific region and heavier-than-usual rains to South America. The alert indicates at least a 70 percent chance of an El Nino developing in 2014, the Bureau of …
The South Asian summer monsoon directly affects the lives of more than 1/6th of the world’s population. There is substantial variability within the monsoon season, including fluctuations between periods of heavy rainfall (wet spells) and low rainfall (dry spells). These fluctuations can cause extreme wet and dry regional conditions that …
Thunderstorm development is a rapid process occurring within a short period of a few hours. Prior to this development, there is a continuous and gradual change in the atmospheric conditions and the conditions just before the time of occurrence of the thunderstorm may be different from the conditions earlier at …
Wheat-growing regions in Australia are set for a drier winter amid a looming El Nino event, which can bring below-average rain to the country’s east and south. The odds for below-average rainfall is more than 60 percent from June to August in parts of southern Western Australia, most of South …
