Atmosphere

Greenhouse Gas bulletin: the state of greenhouse gases in the atmosphere based on global observations through 2022

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 …

February breaks global temperature records by 'shocking' amount

Global temperatures in February smashed previous monthly records by an unprecedented amount, according to Nasa data, sparking warnings of a climate emergency. The result was “a true shocker, and yet another reminder of the incessant long-term rise in global temperature resulting from human-produced greenhouse gases”, wrote Jeff Masters and Bob …

Record leap in carbon dioxide seen in 2015

The level of carbon dioxide in the atmosphere increased at a record pace last year, US government scientists reported, raising new concern about one of the top greenhouse gases and the effects of global warming. The measurement came from the National Oceanic and Atmospheric Administration's Mauna Loa Observatory in Hawaii. …

Hot February shatters records as scientists warn global warming is advancing more rapidly

This year is shaping up to be possibly the hottest in human history after satellite readings showed how February obliterated the temperature record set in January. The record comes as a new study warns that the rate of warming around the globe is faster than previously predicted with dire consequences …

The terrestrial biosphere as a net source of greenhouse gases to the atmosphere

The terrestrial biosphere can release or absorb the greenhouse gases, carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), and therefore has an important role in regulating atmospheric composition and climate. Anthropogenic activities such as land-use change, agriculture and waste management have altered terrestrial biogenic greenhouse gas fluxes, and the …

Japan says El Nino weakens, to return to normal weather in summer

Japan's weather bureau said on Thursday the El Nino weather pattern, which is often linked to heavy rainfall and droughts, was expected to continue weakening and that there was a high possibility the weather would return to normal by summer. The Japan Meteorological Agency projected a similar forecast last month. …

Assessment of net mitigation in the context of international greenhouse gas emissions control mechanisms

This paper discusses the scope for market mechanisms, already established for greenhouse gas mitigation in Annex 1 countries that ratified the Kyoto Protocol, for implementing "net mitigation," defined here as mitigation beyond Annex 1 countries' formal mitigation requirements under the Kyoto Protocol. Such market mechanisms could be useful for establishing …

Contrasting impacts of urban forms on the future thermal environment: example of Beijing metropolitan area

This study investigated impacts of urban forms on the future thermal environment over Beijing, the capital city of China. Beijing is experiencing remarkable urban expansion and is planned to undergo the transformation of urban forms from single-centric (compact-city)to poly-centric city (dispersedcity). Impacts of urban forms on the future thermal environment …

Delayed La Nina seen buoying U.S., Asia crops: MDA weather

A delay in the onset of the La Nina weather pattern this year is likely to buoy crops across key growing regions in the United States, Australia and India, a leading weather forecaster said on Thursday. Another year of bumper production of crops such as corn, wheat and soybeans would …

Does chronic nitrogen deposition during biomass growth affect atmospheric emissions from biomass burning?

Chronic nitrogen deposition has measureable impacts on soil and plant health. We investigate burning emissions from biomass grown in areas of high and low NO x deposition. Gas and aerosol-phase emissions were measured as a function of photochemical aging in an environmental chamber at UC-Riverside. Though aerosol chemical speciation was …

The Arctic freshwater system in a changing climate

The World Climate Research Programme (WCRP) Climate and Cryosphere (CliC) Project, the Arctic Monitoring and Assessment Programme (AMAP) and the International Arctic Science Committee (IASC) have released a summary report, titled 'The Arctic Freshwater System in a Changing Climate,' which outlines the effects of the changing Arctic atmosphere on the …

Saturday hottest February day in two decades: Met office

With the mercury topping 36.5 degrees Celsius on Saturday, Karachi witnessed it the hottest day of the month in over two decades, the Met office said on Sunday. The heat wave is expected to continue till Monday or Tuesday after which temperatures will gradually dwindle down, officials say. The reason …

El Niño–Southern Oscillation influence on tropospheric mercury concentrations

The El Niño–Southern Oscillation (ENSO) affects the tropospheric concentrations of many trace gases. Here we investigate the ENSO influence on mercury concentrations measured in the upper troposphere during Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrumented Container flights and at ground at Cape Point, South …

High sediment mercury level in Artic: Study

There is a high sediment mercury levels in Artic which is more prone for pollution in the region, a recent study has revealed. The study was conducted on 'Kongsfjorden', one of the Fjord located at Ny-Alesund, Svalbard, by a group of researchers from Kottayam Kerala' School of Environmental Sciences affiliated …

El Nino may give way to better monsoon in 2016

After two straight years of drought, there's finally reason to hope for a normal monsoon this year. Most international models indicate that El Nino, the scourge of the monsoon in India, would dissipate by summer, providing neutral conditions for the rainy season in the country. Although it is early days …

January 2016 warmest on record: U.S. agency

The past month is the warmest since record keeping began in 1880, which continues a nine-month streak of record high monthly temperatures, according to the latest report released by the U.S. National Oceanic and Atmospheric Administration (NOAA). The average temperature across global land and ocean surfaces in January was 1.04 …

El Niño has passed peak strength but impacts will continue, UN warns

The El Niño that caused record temperatures, drought and floods over the last year has passed its peak strength but will continue to have humanitarian impacts for months to come, the UN has said. The World Meteorological Organisation (WMO) said the event, which plays havoc with weather systems around the …

Hottest January smashes global temperature record

Last month was the hottest January in modern times, US data showed on Wednesday, the latest in a string of heat records fuelling concerns over the pace of climate change. The average temperature across global land and ocean surfaces was 1.87 degrees Fahrenheit (1.04 Celsius) above the 20th century average …

Global temperatures leap higher in January, smashing records

This year has got off to a scorching start, with global temperatures marching to new highs as a giant El Nino rode on the back of creeping climate change, data from Japan and the US show. Just a month after the world notched its hottest year on record, January's global …

Transatlantic flight times and climate change

Aircraft do not fly through a vacuum, but through an atmosphere whose meteorological characteristics are changing because of global warming. The impacts of aviation on climate change have long been recognised, but the impacts of climate change on aviation have only recently begun to emerge. These impacts include intensified turbulence …

Greenhouse gases fuelling long-term global warming

The Earth is known to be able to restore its temperature equilibrium after a period of natural warming. But the phenomenon tends to be overwhelmed locally by external drivers like greenhouse gases that can cause sustained changes in global temperature in the long run, a study has found. Researchers at …

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