Opwarming slaat op hol!
Re: Opwarming slaat op hol!
Ah, naam verkeerd gelezen, komt vast door dat oude liedje van de George Baker Selection: Una paloma blanca 
Re: Opwarming slaat op hol!
Ik weet niet of het klimaat op hol slaat maar hieronder toch een paar opvallende uitspraken die de wenkbrauwen mogelijk doen fronsen
Severe hurricanes, storm surges and an increase in the number of icebergs are just some of the changes planet Earth has experienced due to warming oceans over the last 20 years, according to a new report.
The report, Explaining ocean warming: causes, scales, effects and consequences, which was presented at the IUCN World Conservation Congress in Hawaii recently (5 September 2016), has found the upper depths of the world's oceans have warmed significantly since 1995.
A chapter of the study, led by Professor Grant Bigg and Professor Edward Hanna from the University of Sheffield's Department of Geography, has revealed how this increase in sea temperatures has changed global weather patterns.
The Sheffield scientists have shown that the rise in ocean temperatures has caused an increase in the number of severe hurricanes and typhoons, such as Hurricane Katrina, which devastated New Orleans in 2005, and Typhoon Haiyan, which caused massive destruction in the Philippines in 2013.
Hurricanes have even been observed in the South Atlantic for the first time since satellite records began in the 1970s. The area was traditionally viewed as an unlikely region for hurricane formation because of its cooler sea surface temperatures, however in 2004 conditions were more favourable than normal due to warmer ocean temperatures, spawning Hurricane Catarina off the coast of Brazil.
The report also shows that warmer seas have resulted in a significant loss of ice in the Arctic region. The atmosphere in the polar regions has warmed at about twice the average rate of global warming with Arctic coasts experiencing a rise in the occurrence of storm surges.
This increase in storm surges can have a detrimental effect on fragile ecosystems in the area, such as low relief tundra, underlain by permafrost, according to the report.
Warmer oceans have also caused a distinct change in El Niño events -- the warmer currents associated with the cycle have now been observed towards the central Pacific rather than the west, according to the Sheffield scientists.
Professor Grant Bigg, from the University's Department of Geography, said: "Many people may associate warmer seas with the pleasant weather conditions they're used to experiencing while on holiday, but the fact of the matter is that an increase in sea temperatures is having a huge impact on the world's weather.
"Our study has shown that severe hurricanes, storm surges, melting ice in the Arctic region and changes to El Niño are all being caused by sea temperatures rising across the planet. These are all things that can have a devastating impact on the way we live our lives.
"We hope that this research, together with studies presented by our colleagues in Hawaii this week, will help to shape the response of conservation and sustainable development to ocean warming."
The report also predicts what implications warming seas may have for our planet in the near future if current trends continue.
The continued warming of tropical oceans is likely to cause stresses on ecosystems, such as coral bleaching, and stronger tropical cyclones. It may also cause changes to climate over land, which could reduce crop production as temperatures rise.
This research is part of a report on ocean warming by some of the world's leading climate change scientists. The report was presented at the IUCN's World Conservation Congress in Hawaii on 5 September 2016. For more information on the IUCN's World Conservation Congress, please visit:
bron ScienceDaily
Severe hurricanes, storm surges and an increase in the number of icebergs are just some of the changes planet Earth has experienced due to warming oceans over the last 20 years, according to a new report.
The report, Explaining ocean warming: causes, scales, effects and consequences, which was presented at the IUCN World Conservation Congress in Hawaii recently (5 September 2016), has found the upper depths of the world's oceans have warmed significantly since 1995.
A chapter of the study, led by Professor Grant Bigg and Professor Edward Hanna from the University of Sheffield's Department of Geography, has revealed how this increase in sea temperatures has changed global weather patterns.
The Sheffield scientists have shown that the rise in ocean temperatures has caused an increase in the number of severe hurricanes and typhoons, such as Hurricane Katrina, which devastated New Orleans in 2005, and Typhoon Haiyan, which caused massive destruction in the Philippines in 2013.
Hurricanes have even been observed in the South Atlantic for the first time since satellite records began in the 1970s. The area was traditionally viewed as an unlikely region for hurricane formation because of its cooler sea surface temperatures, however in 2004 conditions were more favourable than normal due to warmer ocean temperatures, spawning Hurricane Catarina off the coast of Brazil.
The report also shows that warmer seas have resulted in a significant loss of ice in the Arctic region. The atmosphere in the polar regions has warmed at about twice the average rate of global warming with Arctic coasts experiencing a rise in the occurrence of storm surges.
This increase in storm surges can have a detrimental effect on fragile ecosystems in the area, such as low relief tundra, underlain by permafrost, according to the report.
Warmer oceans have also caused a distinct change in El Niño events -- the warmer currents associated with the cycle have now been observed towards the central Pacific rather than the west, according to the Sheffield scientists.
Professor Grant Bigg, from the University's Department of Geography, said: "Many people may associate warmer seas with the pleasant weather conditions they're used to experiencing while on holiday, but the fact of the matter is that an increase in sea temperatures is having a huge impact on the world's weather.
"Our study has shown that severe hurricanes, storm surges, melting ice in the Arctic region and changes to El Niño are all being caused by sea temperatures rising across the planet. These are all things that can have a devastating impact on the way we live our lives.
"We hope that this research, together with studies presented by our colleagues in Hawaii this week, will help to shape the response of conservation and sustainable development to ocean warming."
The report also predicts what implications warming seas may have for our planet in the near future if current trends continue.
The continued warming of tropical oceans is likely to cause stresses on ecosystems, such as coral bleaching, and stronger tropical cyclones. It may also cause changes to climate over land, which could reduce crop production as temperatures rise.
This research is part of a report on ocean warming by some of the world's leading climate change scientists. The report was presented at the IUCN's World Conservation Congress in Hawaii on 5 September 2016. For more information on the IUCN's World Conservation Congress, please visit:
bron ScienceDaily
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Oud-forumlid
- Berichten: 514
Re: Opwarming slaat op hol!
Tot nog toe neig ik naar de conclusie dat er (nog!) geen duidelijke trend (m.u.v. het Atlantische en Caribische gebied) in aantal en intensiteit van tropische cyclonen is te ontdekken.
Zie: http://www.euronet.nl/users/e_wesker/atlhur.html
Ik eindig het stukje met: "One cannot draw from this the conclusion that there is no link between a warming climate and the intensity of tropical storms. There are good thermodynamic reasons to expect such a link to be present. However, there are probably other factors - e.g.: think of wind shear and the thickness of the warm water layer in the tropical oceans - at play which currently prevent a rise in intensity."
Er zijn echter ook recente publicaties waarin wordt gesteld dat de intensiteit van aanlandende tropische stormen in de NW Pacific lijkt toe te nemen. Opmerkelijk genoeg lijkt dat niet te gelden voor de exemplaren die boven zee blijven.
Ik heb dat verband in mijn stukje over tropische stormen niet bekeken (zou trouwens ook een zeer omvangrijke klus zijn om dat zelf te doen).
Overigens: Dat we met menselijke activiteiten naar een meer duurzame (staats)huishouding moeten streven ... dat is wat mij betreft geen punt van discussie meer.
Mazzel & broge, Evert
Zie: http://www.euronet.nl/users/e_wesker/atlhur.html
Ik eindig het stukje met: "One cannot draw from this the conclusion that there is no link between a warming climate and the intensity of tropical storms. There are good thermodynamic reasons to expect such a link to be present. However, there are probably other factors - e.g.: think of wind shear and the thickness of the warm water layer in the tropical oceans - at play which currently prevent a rise in intensity."
Er zijn echter ook recente publicaties waarin wordt gesteld dat de intensiteit van aanlandende tropische stormen in de NW Pacific lijkt toe te nemen. Opmerkelijk genoeg lijkt dat niet te gelden voor de exemplaren die boven zee blijven.
Ik heb dat verband in mijn stukje over tropische stormen niet bekeken (zou trouwens ook een zeer omvangrijke klus zijn om dat zelf te doen).
Overigens: Dat we met menselijke activiteiten naar een meer duurzame (staats)huishouding moeten streven ... dat is wat mij betreft geen punt van discussie meer.
Mazzel & broge, Evert
Laatst gewijzigd door Oud-forumlid op 25-09-2016 15:27, 1 keer totaal gewijzigd.