Rising temps are drastically changing rainfall patterns
FRISCO — After carefully analyzing 30 years of rainfall data in Australia, scientists said they tracked a clear pattern of intensifying peak rainfall during storms that will lead to increased flash flood risks in Australia’s urban catchments.
New study says IPCC projections are too conservative
By Summit Voice
FRISCO — In a classic case of climate disruption, research shows that the dry season in southern Amazonia has lengthened by about one week per decade since 1979. Parts of the region may not be able to support rainforest vegetation much longer. A big forest die-back could trigger the release of large volumes of the greenhouse gas carbon dioxide into the atmosphere, a team of scientists warned this week.
Study shows fundamental ecosystem changes under way
By Summit Voice
Sea ice decline is already changing some Arctic ecosystems in fundamental ways, according to University of Alaska Fairbanks scientists. As part of review team, the two researchers showed, for example, that disappearing sea ice leads to a loss of sea-ice algae, at the very base of the Arctic marine food web. Larger plankton is thriving, replacing smaller, but more nutrient dense plankton. What that means exactly is not yet understood.
New evidence that a changing climate is disrupting feeding and breeding cyclesof migrating birds
By Summit Voice
FRISCO — In another sign that climate disruption will have cascading effect on ecosystems, researchers with York University have shown how migrating songbirds are affected by warmer spring temperatures in the northern hemisphere.
In a five-year study, biologists used tiny geolocator ‘backpacks” to track purple martins from their winter habitat in South America to breeding sites in eastern North America. The birds consistently left South America at the same time each year, not having any idea that warmer spring temperatures at their breeding sites was affecting the availability of food. Continue reading “Migrating songbirds feeling global warming impacts”→
Effort aims to help communities prepare for potential disruption
By Summit Voice
FRISCO —While the U.S. is still generally mired in a nonproductive debate about whether global warming is real, a new European climate initiative will try to blend seasonal to decadal forecasting to take advantage of recent advances in the ability to forecast climate variability and change.
The initiative will work to develop new and improved tools to provide specific information for stakeholders like the energy, health, water resources, food security, forestry and transport sectors.
The project is based on the concept that Monthly-to-decadal forecasts hold potential to be of great value to a wide range of relevant decision making, wherever the outcomes are heavily influenced by climate variability. Despite its potential value in informing European business and adaptation strategy, such forecast information is currently under-used. Continue reading “European researchers want to forecast climate variability”→
How much extra energy are we putting in the atmosphere through emission of greenhouse gases? One Australian researcher put it into context: “The radiative forcing of the CO2 we have already put in the atmosphere in the last century is … the equivalent in energy terms to almost half a billion Hiroshima bombs each year.”
With more energy radiating down on the planet rather than back up into space, the planet continues to heat up. As the atmosphere warms, it is able to hold more water vapor — thus strengthening the global hydrological cycle.
With all that extra energy, more water is pulled out of the subtropic regions and moved toward higher-precipitation areas in the subpolar regions, resulting in stronger droughts and stronger storms. Or, as the video above explains, how the wet gets wetter and the dry gets drier.
Handful of below-average temps spurs frantic activity on denier website
By Bob Berwyn
SUMMIT COUNTY — Global warming deniers have always been good at cherry picking data to try and prove that that Earth isn’t warming inexorably, and to the likely detriment of most species on the planet.
This week, the denier website Watts Up With That took the schtick to a whole new level with a post highlighting a handful of low temperature records in recent days. The post carefully avoided making the claim that those readings somehow disprove global warming — that would, of course, demolish any last shred of credibility that might still linger with the increasingly outlandish denier arguments.