Atmosphere And Ozone Layer

Order of the National Green Tribunal regarding ozone pollution across urban India, 21/03/2025

Order of the National Green Tribunal in the matter of News Item titled “CSE report finds dangerous increase in ozone pollution across urban India” appearing in Down to Earth dated 06.08.2024. The Principal Bench of the NGT heard the matter on March 21, 2025. In the original application, registered suo …

Ozone and UV bulletin

The stratosphere ozone layer is slowly recovering and the recovery will be complete in most parts of the atmosphere in the coming decades, according to the latest bulletin by the World Meteorological Organization (WMO). The bulletin with the updated status of the ozone layer by WMO-Global Atmosphere Watch bulletin returned …

Scientific assessment of ozone depletion: 2022 - executive summary

Science has been one of the foundations of the success of the Montreal Protocol. This assessment highlights advances and updates in the scientific understanding of ozone depletion since the 2018 Scientific Assessment of Ozone Depletion and provides policy-relevant scientific information on current challenges and future policy choices. The latest edition …

A study on the impacts of HFC consumption trends in Article 5 countries

As part of the workplan agreed under the workstream to complement the implementation of the Kigali Amendment, the Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants (CCAC) has commissioned a study to provide a profile of current and projected hydrofluorocarbon (HFC) consumption in Montreal Protocol Article 5 countries …

Healing the ozone layer through diplomacy

The Montreal Protocol shows what is possible when science, diplomacy, and business cooperate to implement international environmental agreements. When the people became aware of a hole in the ozone layer over Antarctica—and damage to the protective layer of atmosphere around the world—leaders around the world coordinated action on ozone depleting …

Induced innovation and international environmental agreements: evidence from the ozone regime

Global environmental problems are some of the most pressing issues that humanity is facing. There are few examples of success at resolving them; the fight to protect the ozone layer is one of them. This paper provides evidence that the Montreal Protocol’s restrictions on chlorofluorocarbons (CFCs) triggered a substantial increase …

Montreal Protocol and beyond: 17 stories along the journey from ozone layer protection to sustainable development

This publication is a collection of stories that celebrate the changing face of industry, reflecting on how the efforts supported by UNIDO to improve the environmental performance of the productive sector, have brought about sustainable solutions to other global challenges. This work is broad in nature, engulfing a multitude of …

Optimal cooling pathways of India: an implementation framework of ICAP

The demand of active cooling systems such as air conditioners and chillers is increasing rapidly. This leads to an increase in emissions of Chlorofluorocarbons (CFC) and Hydro-Chlorofluorocarbons (HCFC), which negatively impact the Earth's ozone layer. Over the past years, ozone depletion has become a serious concern both at the national …

Differential upper ocean response depicted in moored buoy observations during the pre-monsoon cyclone Viyaru

The pre-monsoon cyclone Viyaru in the Bay of Bengal during May 2013 traversed a long track from 5°N to 22°N over 7 days with basin-wide response, which was well captured by the time series observations of OMNI buoy network along with satellite data. Original Source

Ozone-depleting substances 2019

The European Union (EU) has achieved its goals to phase out ozone-depleting substances under the Montreal Protocol. A new European Environment Agency (EEA) report shows that in 2018 the EU again destroyed or exported more ozone-depleting substances than it produced or imported. The EEA’s annual report on ozone-depleting substances confirms …

Global distribution of methane emissions, emission trends, and OH concentrations and trends inferred from an inversion of GOSAT satellite data for 2010–2015

We use 2010–2015 observations of atmospheric methane columns from the GOSAT satellite instrument in a global inverse analysis to improve estimates of methane emissions and their trends over the period, as well as the global concentration of tropospheric OH (the hydroxyl radical, methane's main sink) and its trend. Our inversion …

Persistent spring shortwave cloud radiative effect and the associated circulations over Southeastern China

Clouds strongly modulate regional radiation balance and their evolution is profoundly influenced by circulations. This study uses 2001–16 satellite and reanalysis data together with regional model simulations to investigate the spring shortwave cloud radiative effect (SWCRE) and the associated circulations over southeastern China (SEC). Strong SWCRE, up to 2110 W …

China factories releasing thousands of tonnes of illegal CFC gases, study finds

Industries in north-eastern China have released large quantities of an ozone-depleting gas into the atmosphere in violation of an international treaty, scientists have said. Since 2013, annual emissions of the banned chemical Chlorofluorocarbon-11 (CFC-11) from that region have increased by about 7,000 tonnes, according to a report in peer-reviewed journal …

Japan weather bureau sees 80 percent chance of El Nino continuing into summer

Japan’s weather bureau on Wednesday said the El Nino weather pattern appeared to be continuing, with an 80 percent chance it would stretch into the northern hemisphere summer. El Nino is a warming of ocean surface temperatures in the eastern and central Pacific that typically happens every few years, sometimes …

Climate services go local in Western Kenya

Making sure that important weather and climate information reaches everyone is critical for local development – as demonstrated by a WISER (Weather and Climate Information Services for Africa) project in Western Kenya. From its rain-soaked hills to the sweeping Masai Mara, Western Kenya has a vast and varied landscape. But …

India Cooling Action Plan (ICAP)

Union Environment Minister released the India Cooling Action Plan (ICAP) that seeks to provide an integrated approach towards cooling and related areas including reduction in the cooling demand, in order to reduce emissions. Reduction of cooling demand across sectors by 20-25 per cent and refrigerant demand by 25-30 per cent …

El Nino makes trouble for broad areas of China, may hurt rice farmers

El Nino, a periodic event that involves warming currents in the Pacific Ocean, is to blame for the unusually wet winter in southern parts of China and has been responsible for air pollution retained in areas of the north, experts said. Since June, the area with rising temperatures in the …

2015-2016 El Nino triggered disease outbreaks across globe

The 2015-2016 El Niño event brought weather conditions that triggered regional disease outbreaks throughout the world, according to a new NASA study that is the first to comprehensively assess the public health impacts of the major climate event on a global scale. El Niño is an irregularly recurring climate pattern …

Acting on many fronts: incentives and regulations to phase-down HFCs in India

This report provides insights on creating an ecosystem for India's successful transition away from hydrofluorocarbons (HFCs), maps the global regulatory options that could be adopted, and emphasises on the need for policy certainty. The report, published in collaboration with the Norwegian Environment Agency, is based on in-depth interviews with more …

Scientific assessment of ozone depletion: 2018

The Assessment documents the advances in scientific understanding of ozone depletion reflecting the thinking of the many international scientific experts who have contributed to its preparation and review. These advances add to the scientific basis for decisions made by the Parties to the Montreal Protocol. It is based on longer …

Ozone layer on recovery track, northern hemisphere likely to heal by 2030s: UN Report

NEW DELHI: The earth’s protective ozone layer is well on track to recovery, thanks to international efforts against ozone-depleting substances. The healing signs of ozone layer was revealed on Monday by a new assessment report on Montreal Protocol (MP), the over 30-year-old global treaty which deals with reduction of ozone-depleting …

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