Our shift to NE winds has occurred & will usher in an extended period of onshore winds & cooler temps. Moisture will stream inland off the Atlantic producing scattered showers that will be enhanced Wed. afternoon-early Thu. by an upper level disturbance as well as Fri. night-Sat. Highs only in the 60s & lows in the 40s & 50s with little sun through Sat.
The tropics are quiet now & we'll probably walk out the rest of the "official" season (through Nov. 30th) with few problem as "Sandy" was likely the "pattern breaker" that ended the show. But it was 18 years ago -- Nov. 13th, 1994 -- that "Gordon" rolled across Florida. The storm nailed Fl. 3 times -- the Keys, Ft. Myers then curling back to Fl. near Cape Canaveral after already crossing the state once. The storm was fascinating & devastating all at the same time. "Gordon" only briefly reached hurricane strength while east of Fl. over the gulf stream. But storm caused flooding & mudslides that killed 1,000+ in Hispaniola. Several tornadoes were spawned in Fl. along with severe beach erosion. "Gordon" was also interesting in that it became subtropical for a time in the SW Atlantic before becoming tropical
again in the SE Gulf. Click here for more info. from the NHC.
NASA and British Antarctic Survey scientists have reported the first direct evidence that marked changes to Antarctic sea ice drift caused by changing winds are responsible for observed increases in Antarctic sea ice cover in the past two decades. The results help explain why, unlike the dramatic sea ice losses being reported in the Arctic, Antarctic sea ice cover has increased under the effects of climate change.
Research scientists Ron Kwok of NASA's Jet Propulsion Laboratory, Pasadena, Calif., and Paul Holland of the Natural Environment Research Council's British Antarctic Survey, Cambridge, United Kingdom, used maps created by JPL from more than five million individual daily ice-motion measurements. The data, captured over a period of 19 years by four U.S. Defense Meteorological satellites, show, for the first time, long-term changes in sea ice drift around Antarctica.
"Until now, these changes in ice drift were only speculated upon, using computer models of Antarctic winds," said Holland, lead author of the study published this week in the journal Nature Geosciences. "This study of direct satellite observations shows the complexity of climate change. The total Antarctic sea ice cover is increasing slowly, but individual regions are actually experiencing much larger gains and losses that are almost offsetting each other overall.
"We now know that these regional changes are caused by changes in the winds, which, in turn, affect the ice cover through changes in both ice drift and air temperature," he continued. "The changes in ice drift also suggest large changes in the ocean surrounding Antarctica, which is very sensitive to the cold and salty water produced by sea ice growth."
Holland said sea ice around Antarctica is constantly being blown away from the continent by strong northward winds. "Since 1992, this ice drift has changed," he said. "In some areas, the export of ice away from Antarctica has doubled, while in others it has decreased significantly."
Sea ice plays a key role in Earth's environment, reflecting heat from the sun and providing a habitat for marine life. At both poles, sea ice cover is at its minimum during late summer. However, during the winter freeze in Antarctica, this ice cover expands to an area roughly twice the size of Europe. Ranging in thickness from less than three feet (a meter) to several meters, the ice insulates the warm ocean from the frigid atmosphere above.
This new research also helps explain why observed changes in the amount of sea ice cover are so different in the two polar regions. The Arctic has experienced dramatic ice losses in recent decades, while the overall ice extent in the Antarctic has increased slightly. However, this small Antarctic increase is actually the result of much larger regional increases and decreases, which are now shown to be caused by wind-driven changes. In places, increased northward winds have caused the sea ice cover to expand outwards from Antarctica. In contrast, the Arctic Ocean is surrounded by land, so changed winds cannot cause Arctic ice to expand in the same way.
"The Antarctic sea ice cover interacts with the global climate system very differently than that of the Arctic, and these results highlight the sensitivity of the Antarctic ice coverage to changes in the strength of the winds around the continent," said Kwok.
Climate change has had contrasting impacts across Antarctica in recent decades. The Antarctic Peninsula has warmed as much as anywhere in the Southern Hemisphere, while East Antarctica has shown little change or even a small cooling around the coast. The new research improves understanding of present and future climate change. The authors note it is important to distinguish between the Antarctic Ice Sheet - glacial ice - which is losing volume, and Antarctic sea ice - frozen seawater - which is expanding.
Click here for more info. & pic's.
Well....count my own Action News as grabbing headlines & creating "panic" :) by reporting that climate change could eventually cause coffee to "go extinct". Ugh. The reality -- this just in! -- is that even if a coffee shortage were to occur, it would be in 65+ years. But the truth is that other areas of the world could become good for producing coffee making up for at least parts of any shortfall.....if a "shortfall" indeed is realized. There may also be new kinds of coffee beans or perhaps a climate reversal! Click here for the story....click here for another view.