Connect with us

Buzz

Oceans heating up faster than expected, set record in 2018 | News

Editor

Published

on

[ad_1]

The world’s oceans are heating up at an accelerating pace and faster than previously estimated, setting a new temperature record in 2018 as global warming threatens a diverse range of marine life, scientists have warned.

New measurements, aided by an international network of 3,900 floats deployed in the oceans since 2000, showed more warming since 1971 than calculated by the latest UN assessment of climate change in 2013, the researchers said.

The findings published on Thursday in the US journal Science, led by the Chinese Academy of Sciences, debunk previous reports that suggested a so-called pause in global warming in recent years.

“Global warming is here, and has major consequences already. There is no doubt, none!” the authors wrote in a statement.

Man-made greenhouse gas emissions are warming the atmosphere, according to the overwhelming majority of climate scientists, and a large part of the heat gets absorbed by the oceans. That in turn is forcing fish to flee to cooler waters.

“Ocean heating is a very important indicator of climate change, and we have robust evidence that it is warming more rapidly than we thought,” said co-author Zeke Hausfather, a graduate student in the Energy and Resources Group at the University of California, Berkeley.






How much plastic is in our oceans? (2:32)

About 93 percent of excess heat – trapped around the Earth by greenhouse gases that come from the burning of fossil fuels – accumulates in the world’s oceans.

The latest report relied on four studies, published between 2014 and 2017, that gave more precise estimates of past trends in ocean heat, allowing scientists to update past research and hone predictions for the future.

A key factor in the more accurate numbers is an ocean monitoring fleet called Argo, which includes nearly 4,000 floating robots that “drift throughout the world’s oceans, every few days diving to a depth of 2,000 metres  and measuring the ocean’s temperature, pH, salinity and other bits of information as they rise back up”, said the report.

Argo “has provided consistent and widespread data on ocean heat content since the mid-2000s”, it said.

Record temperature

The new analysis shows warming in the oceans is on pace with measurements of rising air temperature.

And if nothing is done to reduce greenhouse gases, “models predict that the temperature of the top 2,000 metres of the world’s oceans will rise 0.78 degrees Celsius by the end of the century”, it said.

The thermal expansion – water swelling as it warms – would raise sea level 30 centimeters, above any sea level rise from melting glaciers and ice sheets.

“While 2018 will be the fourth warmest year on record on the surface, it will most certainly be the warmest year on record in the oceans, as was 2017 and 2016 before that,” Hausfather said.

“The global warming signal is a lot easier to detect if it is changing in the oceans than on the surface.”






Five things we can do to combat climate change (1:52)

Lead author Lijing Cheng, of the Institute of Atmospheric Physics at the Chinese Academy of Sciences, said records for ocean warming had been broken almost yearly since 2000.

Overall, temperatures in the ocean down to 2,000 metres rose about 0.1 degree Celsius from 1971-2010, he told Reuters news agency. The 2013 UN. assessment estimated slower rates of heat uptake but did not give a single comparable number.

Almost 200 nations plan to phase out fossil fuels this century under the 2015 Paris climate agreement to limit warming. US President Donald Trump, who wants to promote US fossil fuels, plans to pull out of the pact in 2020.

A separate study on Monday, by the European Union’s Copernicus Climate Change Service, said 2018 was the fourth warmest year for global surface temperatures in records dating back to the 19th century.

Ocean temperatures are less influenced by year-to-year variations in the weather. It can take more than 1,000 years for deep ocean temperatures to adjust to changes at the surface.

Among effects, extra warmth can reduce oxygen in the oceans and damages coral reefs that are nurseries for fish, the scientists said.

Warmer seas release more moisture that can stoke more powerful storms.

Warmer ocean water also raises sea levels by melting ice, including around the edges of Antarctica and Greenland.

[ad_2]

Source link

قالب وردپرس

Buzz

Ottawa transit commission hopes to prioritize COVID-19 vaccines for OC Transpo workers

Editor

Published

on

By

Ottawa’s transit commission is pushing local and provincial health officials to recognize the role OC Transpo operators have played in keeping the city running during the COVID-19 pandemic, hoping to bump train and bus drivers in the vaccination queue amid a recent surge in coronavirus infections affecting transit workers.

More than 100 OC Transpo staff across the entire organization have tested positive for the coronavirus since the start of the pandemic, according to an update at Wednesday morning’s transit commission meeting.

Of those cases, 26 employees are currently recovering from the disease in self-isolation.

OC Transpo has seen a recent jump in COVID-19 cases, with Ottawa city council receiving reports of eight operators testing positive for the virus over a recent eight-day period.

Transit commissioner Sarah Wright-Gilbert attempted to find out how many of the total cases are traced to workplace transmission, but OC Transpo boss John Manconi said he’s been advised by medical officer of health Dr. Vera Etches that he can’t share that information for privacy reasons.

Transit operators are listed in the second priority group of essential workers as part of Ontario’s COVID-19 vaccine sequencing plans, but several commissioners speaking Wednesday wanted to get the city’s bus and train drivers bumped higher in the order.

Councillors Riley Brockington and Glen Gower both put forward motions looking to get front-line OC Transpo employees prioritization in vaccine sequencing, but others pointed out that the much-debated public health topic of who gets the vaccine and when is well beyond the scope of the transit commission.

“We are not in a position in transit commission to be decreeing, or making an edict, about what group of essential workers is more at risk than others and should be prioritized. That should be left up to public health experts,” Wright-Gilbert said.

Knoxdale-Merivale Coun. Keith Egli, who also chairs the Ottawa Board of Health, reflected on the board’s four-plus-hour meeting on Monday evening, during which vaccine sequencing and prioritizing essential workers dominated the conversation.

“Vaccine sequencing is obviously a very difficult maze to get through,” he said.

Continue Reading

Buzz

COVID-19: Ottawa police announce end of 24-7 presence at Ontario-Quebec border

Editor

Published

on

By

Less than two days after the Ontario government’s latest COVID-19 restrictions came into effect, calling for non-essential traffic to be stopped at the province’s borders with Quebec and Manitoba, the Ottawa Police Service has announced it is stopping its 24-hour checkpoints.

According to a statement issued by the service Tuesday evening, the around-the-clock border checkpoints were set to end as of 8 p.m. on Tuesday in favour of rotating checkpoints across the city throughout the day until Ontario’s temporary regulations end.

“Since the onset of the border operations, the OPS has been working closely with Ottawa Public Health (OPH) along with local stakeholders and interprovincial stakeholders (the City of Ottawa, the City of Gatineau, the Ontario Provincial Police etc.) to assess any local public health, traffic and safety impacts. The assessment resulted in today’s operational changes,” the statement said.

“The operational changes announced today are designed to better ensure the health and safety of all, to minimize delays and/or hazards for travellers and to ensure essential workers can get to their places of employment on time.”

The statement also said the police service, while working to comply with the provincial order, was focused on education and enforcement actions that “support improved public health outcomes and respect the concerns of our most marginalized and racialized communities”

Officers said they will be conducting daily assessments on border crossings and that there could be further changes.

In a statement to Global News, a spokesperson for Solicitor General Sylvia Jones said that the border closures are ultimately subject to the discretion of local police enforcing the regulations.

“Local police services are best positioned to determine the operational deployments necessary to ensure the continued safety of their communities,” the spokesperson said, noting that the order’s regulations still apply to individuals entering the province.

The temporary order restricts Quebec residents from entering Ontario. If prompted, individuals must stop when directed by an enforcement officials and provide their reason for entering the province.

The main exemptions to the restrictions include if the person’s main home is in the province, if they work in Ontario, if they’re transporting goods, if they’re exercising Indigenous or treaty rights, if they need health care or if there’s a basis on compassionate grounds.

Continue Reading

Buzz

COVID-19 vaccines in Ottawa: Nearly half of all residents in their 60s have at least one dose

Editor

Published

on

By

OTTAWA — Ottawa Public Health’s latest COVID-19 vaccination update shows that nearly half of all residents 60 to 69 years old have had at least one dose of a COVID-19 vaccine, a figure that has all but doubled in the past week.

OPH’s COVID-19 vaccination dashboard shows 58,000 residents 60 to 69 have had at least one dose of a COVID-19 vaccine, accounting for 49.3 per cent of that age group’s population in Ottawa. Last Wednesday, OPH reported 30,000 residents 60 to 69 had had at least one dose, which was 25.4 per cent.

As age demographics get younger, the population grows larger and the coverage by percentage may appear to grow more slowly, even if clinics are vaccinating greater numbers of people. For example, the latest figures show that 83 per cent of people aged 70 to 79 have had at least one dose. By raw population that’s 60,000 people, only slightly higher than half of all people in their 60s.

Vaccinations are open through the Ontario portal to anyone 60 and older and, this week, the AstraZeneca vaccine was approved for administration at pharmacies and primary care clinics to anyone in Ontario 40 and older.

OPH reported a new shipment this week of 25,740 doses of the Pfizer-BioNTech vaccine. To date, Ottawa has received 305,130 doses of COVID-19 vaccines from the provincial government.

The number of eligible residents (i.e. 16 and older) with at least one dose of a vaccine is now up to 28 per cent.

Tuesday was Ottawa’s second-busiest day for vaccinations overall, with the OPH reporting 9,729 shots administered. Last Friday saw 9,887 shots administered in a single day.

QUICK STATS

  • Ottawa residents with at least one dose: 248,668
  • Ottawa residents with two doses: 26,722
  • Percent of eligible population (residents 16 and older) with at least one dose: 28 per cent
  • Percent of eligible population (residents 16 and older) with two doses: 3 per cent
  • Percent of total population with at least one dose: 24 per cent
  • Percent of total population with two doses: 3 per cent

VACCINATION COVERAGE BY AGE FOR OTTAWA RESIDENTS WITH AT LEAST ONE DOSE

  • 10-19: 1.6 per cent (1,804 people)
  • 20-29: 8.3 per cent (13,452 people)
  • 30-39: 9.5 per cent (14,999 people)
  • 40-49: 12.9 per cent (17,350 people)
  • 50-59: 28.8 per cent (40,320 people)
  • 60-69: 49.3 per cent (58,627 people)
  • 70-79: 82.9 per cent (62,808 people)
  • 80-89: 87.5 per cent (29,358 people)
  • 90+: 89.2 per cent (7,893 people)
  • Unknown age: 2,057 people 

Continue Reading

Chat

Trending