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Subject: Again... one local effect.... Author: sci guy [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 19:23:08 11/28/06 Tue In reply to: Curmudgeon 's message, "I guess the growing Hubbard Glacier in Alaska" on 16:37:38 11/28/06 Tue http://pubs.usgs.gov/fs/fs-001-03/ from what I read, it just shows what climatologists have been saying all along... In places where it was previously too cold to snow, it's now snowing more. The accumulation area of the Hubbard (and the few other glaciers which are "growing" is huge in relation to it's ablation area. Think of a lake with a single small outlet in a rainstorm... the levels rise, and the outflow from the stream is a lot more. HOwever, the REST of the area may be gettingless rain, and be able to drain off water in all directions. I know... it's too complex for you to actually READ the USGS information on the Hubbard glacier.... >doesn't count if you're a card-carrying member of the >Environmental Left. Still no access to Google at the >firehouse eh? > > > >> >>it would be funny if it wasn't for the fact that >>glacial shrinking is happening GLOBALLY. >> >>>pointing out the silliness of the Envirnmental Left >>>who point to a glacier that receeded a bit as proof >of >>>their so-called man-caused global warming/climate >>>change. >>> >>> >>> >>> >>> >>> >>> >>> >>>>I love when your side points to a local phenomenom >>and >>>>claims it's global.... >>>> >>>>"It's snowing here, therefore GW doesn't exist!" >>>> >>>>What a load of crap. >>>> >>>> >>>>>monsoons, INCREASING temperatures in northern >>Africa. >>>>> >>>>>"The abnormally cool temperatures reduced the >>>>>temperature difference between the land masses of >>>>>Africa and Eurasia and their respective water >>masses, >>>>>the Atlantic and Indian oceans. Typically, a sharp >>>>>contrast in temperature between land and sea drives >>>>>roaring monsoon winds. Monsoons are seasonal shifts >>>in >>>>>wind direction that signify the beginning of the >>>rainy >>>>>season. >>>>> >>>>>"The LACK OF MONSOONS led to a reduction in cloud >>>>>cover over the Sahel of Africa, southern Arabian >>>>>Peninsula and India that summer. THIS CAUSED >>>>>TEMPERATURES TO INCREASE and induced drought in the >>>>>region. The resulting food shortage reduced the >>>>>population of the Nile Valley by a sixth." >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>> >>>>>>Try reading the WHOLE article you link to... >>>>>> >>>>>>(did youeven BOTHER to read teh headline?) >>>>>> >>>>>>The changes wrought by Pinatubo's sulfuric acid >>>>>>cloud, which blocked a large percentage of >sunlight >>>>>>from reaching the earth, initially included cooler >>>>>>summers and warmer winters, an overall net cooling >>>at >>>>>>the earth's surface and altered winds and weather >>>>>>patterns, Robock said. >>>>>> >>>>>> >>>>>>Yeah, slightly warmer in winter, a lot colder in >>>>>>summer. Net result? Cooling. >>>>>> >>>>>>sheesh... are YOU ever THICK! >>>>>> >>>>>> >>>>>> >>>>>>>"Although overall the planet cools after volcanic >>>>>>>eruptions, over Northern Hemisphere continents it >>>>>>>actually gets warmer in the winter. This is >>because >>>>>>>the wind patterns change in response to heating >of >>>>>the >>>>>>>stratosphere by the volcanic aerosols." >>>>>>> >>>>>>> >>>>>>>href="http://earthobservatory.nasa.gov/Newsroom/M >e >>d >>>i >>>>a >>>>>A >>>>>>l >>>>>>>erts/2002/200202157818.html">http://earthobservat >o >>r >>>y >>>>. >>>>>n >>>>>>a >>>>>>>sa.gov/Newsroom/MediaAlerts/2002/200202157818.htm >l >>< >>>/ >>>>a >>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>>>You DO realize that th article says that >>volcanoes >>>>>>>>COOL the earth, don't you? >>>>>>>> >>>>>>>> >>>>>>>>>Can I get mhy donation back? >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>>>just when we thought we had the weather >>>>>predictions >>>>>>>>>>down. a new kink comes in to play. now we have >>>>>>space >>>>>>>>>>weather, volcanic weather, fire weather, land >>>>mass >>>>>>>>>>change weather. >>>>>>>>>> >>>>>>>>>>Volcanic eruptions on Iceland generated a >>>cascade >>>>>>of >>>>>>>>>>events that led to record low levels of water >>in >>>>>>the >>>>>>>>>>Nile River in Africa and brought famine to the >>>>>>>region >>>>>>>>>>more than two centuries ago, a new study >>>>>>concludes. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>The findings will inform climate forecasting >>>>>>related >>>>>>>>>>to future volcanic activity. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>From June 1783 through February 1784, a series >>>of >>>>>>10 >>>>>>>>>>eruptions from the Laki Craters on this >>European >>>>>>>>>>island in the North Atlantic changed >>atmospheric >>>>>>>>>>conditions in most of the Northern >Hemisphere. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>Unusual temperature and precipitation patterns >>>>>>>peaked >>>>>>>>>>in the summer of 1783, causing below normal >>>>>>rainfall >>>>>>>>>>in most of the Nile drainage basin and >>therefore >>>>>>>>>>record low levels in the mighty river for up >to >>>>>one >>>>>>>>>>year following the eruptions. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>When volcanic eruptions occur, large amounts >of >>>>>>>>sulfur >>>>>>>>>>dioxide are released into the atmosphere. When >>>>>this >>>>>>>>>>gas combines with water vapor, aerosol >>particles >>>>>>>>form. >>>>>>>>>>These particles reflect sunlight back to space >>>>and >>>>>>>>>>therefore cool average temperatures on Earth. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>Researchers used computer models to simulate >>how >>>>>>>>>>Iceland’s Laki eruptions affected temperature >>>and >>>>>>>>>>rainfall levels over the stretch of land from >>>the >>>>>>>>>>Atlantic ocean to the “horn of Africa,” known >>as >>>>>>the >>>>>>>>>>Sahel. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>Simulations showed that the aerosols formed by >>>>the >>>>>>>>>>eruptions cooled average temperatures in the >>>>>>>Northern >>>>>>>>>>Hemisphere by up to 5.4 degrees Fahrenheit. >>Tree >>>>>>>ring >>>>>>>>>>data in Alaska and Siberia also showed reduced >>>>>>>growth >>>>>>>>>>during the same summer, signifying cooler than >>>>>>>normal >>>>>>>>>>weather. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>The abnormally cool temperatures reduced the >>>>>>>>>>temperature difference between the land masses >>>of >>>>>>>>>>Africa and Eurasia and their respective water >>>>>>>masses, >>>>>>>>>>the Atlantic and Indian oceans. Typically, a >>>>sharp >>>>>>>>>>contrast in temperature between land and sea >>>>>drives >>>>>>>>>>roaring monsoon winds. Monsoons are seasonal >>>>>shifts >>>>>>>>in >>>>>>>>>>wind direction that signify the beginning of >>the >>>>>>>>rainy >>>>>>>>>>season. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>The lack of monsoons led to a reduction in >>cloud >>>>>>>>cover >>>>>>>>>>over the Sahel of Africa, southern Arabian >>>>>>Peninsula >>>>>>>>>>and India that summer. This caused >temperatures >>>>to >>>>>>>>>>increase by as much as 3.6 degrees Fahrenheit >>>and >>>>>>>>>>induced drought in the region. The resulting >>>food >>>>>>>>>>shortage reduced the population of the Nile >>>>Valley >>>>>>>by >>>>>>>>>>a sixth. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>"Some of the driest weather occurred over the >>>>Nile >>>>>>>>and >>>>>>>>>>Niger River watersheds," said lead author Luke >>>>>>Oman, >>>>>>>>a >>>>>>>>>>researcher from Rutgers University, NJ. "The >>>>>>>relative >>>>>>>>>>lack of cloud cover and increased temperature >>>>>>likely >>>>>>>>>>amplified evaporation, further lessening water >>>>>>>>>>available for run-off." >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>This dry weather corresponded with record low >>>>>river >>>>>>>>>>water levels from 1783 to 1784. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>“These findings may help us improve our >>>>>predictions >>>>>>>>of >>>>>>>>>>climate response following the next strong >>>>>>>>>>high-latitude eruption, specifically >concerning >>>>>>>>>>changes in temperature and precipitation," >Oman >>>>>>>said. >>>>>>>>>>"Many societies are very dependent on seasonal >>>>>>>>>>precipitation for their livelihoods, and these >>>>>>>>>>predictions may ultimately allow communities >>>time >>>>>>to >>>>>>>>>>plan for consequences, including impacts on >>>>>>regional >>>>>>>>>>food and water supplies." >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>href="http://www.livescience.com/environment/0 >6 >>1 >>>1 >>>>2 >>>>>1 >>>>>>_ >>>>>>>e >>>>>>>>r >>>>>>>>>u >>>>>>>>>>ptions_nile.html">http://www.livescience.com/e >n >>v >>>i >>>>r >>>>>o >>>>>>n >>>>>>>m >>>>>>>>e >>>>>>>>>n >>>>>>>>>>t/061121_eruptions_nile.html [ Next Thread | Previous Thread | Next Message | Previous Message ]

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Subject Author Date Re: Again... one local effect.... Duncan7 08:40:51 11/29/06 Wed