जलवायु परिवर्तन – Page 23 – आवारा मुसाफिर

Earlier flowering raises risks for ecosystem

February 4, 2022763 Views

Study on UK but can be applied for all other areas if larger datasets are available Climate change is causing plants in the UK to flower a month earlier on average, which could have profound consequences for wildlife, agriculture and gardeners. Using a citizen science database with records going back to the mid-18th century, a research team led by the University of Cambridge has found that the effects of climate change are causing plants in the UK to flower one month earlier under recent global warming. The researchers based their analysis on more than 400,000 observations of 406 plant species from Nature’s Calendar, maintained by the Woodland Trust, and collated the first flowering dates with instrumental temperature measurements. FILE PHOTO: A wild flower meadow is pictured ...

जलवायु परिवर्तन

Safe havens for coral reefs predicted to decline dramatically as Earth warms

AWARA MUSAFIR BUREAU

February 2, 2022284 Views

Coral reefs in every region of the world are threatened by climate change, no matter how remote or well protected. A new study predicts that climate change will result in near-total to total loss of existing locations where coral reefs are sheltered from rising ocean temperatures. Adele Dixon of the University of Leeds, U.K., and colleagues present these findings, which are at higher resolution than any previous analysis, in the open-access journal PLOS Climate on February 1, 2022. As climate change progresses, rising ocean temperatures threaten coral reefs around the world. However, in some locations, local ocean dynamics such as upwelling and strong currents were thought to buffer the effects of warming seas, providing protection to reefs. Nonetheless, it was not known if thes...

आस्ट्रेलियाजलवायु परिवर्तन

Australia promises $700 million more to protect Great Barrier Reef

AWARA MUSAFIR BUREAU

January 28, 2022613 Views

Australian Prime Minister Scott Morrison on Friday promised a further A$1 billion ($703 million) to protect the Great Barrier Reef to support thousands of tourism jobs, just months out from a federal election. The reef, one of Australia's best-known natural attractions but under threat from global warming, has been a lightning rod for criticism of the ruling conservative coalition's support for fossil fuels. Morrison, already under pressure over his handling of the country's worst COVID-19 outbreak fuelled by the Omicron variant, said the investment will help protect about 64,000 jobs in Queensland that depend on the reef. The northeastern state will be a major battleground when Morrison goes to the polls by May, seeking a fourth consecutive term for his party. His conservati...

अंटार्कटिकाजलवायु परिवर्तन

World’s most famous ‘mega iceberg’ released 152 billion tonnes of fresh water into ocean

AWARA MUSAFIR BUREAU

January 22, 2022374 Views

Scientists monitoring the giant A68A Antarctic iceberg from space reveal that a huge amount of fresh water was released as it melted around the sub-Antarctic island of South Georgia 152 billion tonnes of fresh water – equivalent to 20 x Loch Ness or 61 million Olympic sized swimming pools, entered the seas around the sub-Antarctic island of South Georgia when the megaberg A68A melted over 3 months in 2020/2021, according to a new study. In July 2017, the A68A iceberg snapped off the Larsen-C Ice Shelf on the Antarctic Peninsula and began its epic 3.5 year, 4000 km journey across the Southern Ocean. At 5719 square kilometres in extent – quarter the size of Wales –, it was the biggest iceberg on Earth when it formed and the sixth largest on record. Around Christmas 2020, the berg rece...

जलवायु परिवर्तन

Climate crisis drives Mediterranean coral populations to collapse

AWARA MUSAFIR BUREAU

January 21, 2022982 Views

A new study led by teams of the Faculty of Biology, the Biodiversity Research Institute (IRBio) of the University of Barcelona, and the Institute of Marine Sciences (ICM-CSIC) of Barcelona has revealed that marine heatwaves associated with the climate crisis are bringing down the populations of coral in the Mediterranean, the biomass of which in some cases has been reduced by 80 to 90%. According to the study, published in the journal Proceedings of the Royal Society B, coral populations of the Mediterranean —essential for the functioning of the coral reefs, one of the most emblematic habitats in this sea— could be unable to recover from the recurrent impact of these extreme episodes, with water temperatures reaching high degrees for days and even weeks. This is the first study ...

जलवायु परिवर्तन

Climate change will limit choice for Winter Games hosts, says study

AWARA MUSAFIR BUREAU

January 19, 20221310 Views

Of the 21 cities to host the Winter Olympics, only Sapporo, Japan would be able to provide fair and safe conditions to stage them again by the end of the century if greenhouse gases are not dramatically reduced, said a University of Waterloo study released on Tuesday. An international team of researchers, led by the University of Waterloo, reviewed historical climate data from the 1920s along with future climate change trends. They determined that winter playgrounds such as St. Moritz and Lillehammer could become Olympic relics by the mid to late century, with unreliable conditions ruling them out as Games hosts. A worker sets up an installation featuring Bing Dwen Dwen, the Beijing 2022 Winter Olympic Mascot and Shuey Rhon Rhon, the 2022 Beijing Winter Paralympic Games Mascot, i...

जलवायु परिवर्तन

2021 fifth warmest year in India since 1901

AWARA MUSAFIR BUREAU

January 14, 2022263 Views

The year 2021 was the fifth warmest year in India since 1901, with the country recording its annual mean air temperature at 0.44 degree Celsius above normal, the India Meteorological Department said on Friday. The country also reported 1,750 deaths due to extreme weather events such as floods, cyclonic storms, heavy rain, landslides, lightning, among others, during the year, it said. "The year 2021 was the fifth warmest year after 2016, 2009, 2017 and 2010 since 1901. The annual mean air temperature for the country was recorded at 0.44 degree Celsius above normal," the MeT department's annual climate statement, 2021 stated. "The warm temperature during winter and post-monsoon season mainly contributed to this," it said In 2016, the annual mean air temperature for the country w...

जलवायु परिवर्तन

EU scientists say 2021 was world’s fifth-hottest year on record

AWARA MUSAFIR BUREAU

January 10, 2022672 Views

Last year was the world's fifth hottest on record, while levels of planet-warming carbon dioxide and methane in the atmosphere hit new highs in 2021, European Union scientists said. The EU's Copernicus Climate Change Service (C3S) said in a report on Monday that the last seven years were the world's warmest "by a clear margin" in records dating back to 1850 and the average global temperature in 2021 was 1.1-1.2C above 1850-1900 levels. The hottest years on record were 2020 and 2016. Countries committed under the 2015 Paris Agreement to try to limit global temperature rise to 1.5C, the level scientists say would avoid its worst impacts. That would require emissions to roughly halve by 2030, but so far they have charged higher. As greenhouse gas emissions change the planet's...

उत्तर अमेरिकाजलवायु परिवर्तन

Climate change might be behind disappearance of ancient bears and lions

AWARA MUSAFIR BUREAU

January 6, 2022406 Views

Lions and brown bears colonized North America in multiple synchronous waves of dispersal across the Bering Land Bridge An international team of researchers led by the University of Adelaide, suggest a change in climate is the likely cause of the mysterious disappearance of ancient lions and bears from parts of North America for a thousand years or more prior to the last Ice Age. In a study in Molecular Ecology, the researchers sequenced DNA from fossils of cave lions and bears from North America and Eurasia to better understand the timing and drivers of their past movement between continents. Co-author, Dr Kieren Mitchell from the University of Adelaide’s Australian Centre for Ancient DNA said, “There's a common perception that outside of mass extinctions or direct human inte...

अर्जेंटीनाजलवायु परिवर्तन

Mass die-off of Magellanic penguins seen during 2019 heat wave

AWARA MUSAFIR BUREAU

January 5, 2022270 Views

In June 2021, an unprecedented heat wave hit the Pacific Northwest and Canada, killing an estimated 1,400 people. On June 28, Seattle reached 108 F — an all-time high — while the village of Lytton in British Columbia recorded Canada’s highest-ever temperature of 121.3 F on June 29, the day before it was destroyed by a heat-triggered wildfire. Climate change is expected to bring more such extreme heat events globally, with far-reaching consequences not just for humans, but for wildlife and ecosystems. In 2019, University of Washington researchers witnessed this in Argentina at one of the world’s largest breeding colonies for Magellanic penguins. On Jan. 19, temperatures at the site in Punta Tombo, on Argentina’s southern coast, spiked to 44 C, or 111.2 F, and that was in the shade. A...