Creato da: diegobaratono il 02/05/2008
NEW ARCHAEOLOGY, SCIENZA, ARCHEOLOGIA SPERIMENTALE, RICERCHE ARCHEOLOGICHE D'AVANGUARDIA, NEWS DAL MONDO, EGITTOLOGIA, EGYPTOLOGY, ARCHEOASTRONOMIA, PALEOGEOMETRIA, CRIPTOGEOMETRIA, CULTURAL GEOMETRY, GEOMETRIA CULTURALE, ARCHITETTURE SACRE
|
Area personale- Login
TagCerca in questo BlogMenuCitazioni nei Blog Amici: 8 Contatta l'autore
Chi può scrivere sul blog
Solo l'autore può pubblicare messaggi in questo Blog e tutti possono pubblicare commenti.
I messaggi e i commenti sono moderati dall'autore del blog, verranno verificati e pubblicati a sua discrezione. LINK DA CONSULTARE - LiriciGreci.org - Egittophilia - Egittologia.net - Pyramidales - WORLDTRUTH - Bibliotheca Alexandrina - Osservatorio virtuale - INAF-Osservatorio Astronomico Torino - Giza Plateau Mapping Project - AERA, Ancient Egypt Research Associates - Il Museo Egizio di Torino - Il Museo Egizio del Cairo - Ecco il Louvre - Ecco il British Museum - Musei Vaticani - Egyptians Gods - Previsioni meteo - Insolazione - California Institute of Technology - Astrocaltech - Geologicaltech - A tutto Caltech - Massachussetts Institute of Tecnology - Ecco gli Uffizi - Istituto Nazionale di Geofisica e Vulcanologia - Terremoti in tempo reale - MONITORAGGIO TERREMOTI REAL TIME - ESA (Agenzia Spaziale Europea) - NASA - LIETI CALICI - LIETI CALICI II - Science - ScienceNews - C.N.R. (Consiglio Nazionale delle Ricerche) - Moon Phases - Ordine Cisterciense - Abbazia di Casamari - Abbazia di Fossanova - Abbazia di Staffarda - Abbazia di Morimondo - Pompei - Ercolano - Amalfi - Tutto Darwin - Tutto Lyell - Ordine Templare - Politecnico di Torino - Università Amedeo Avogadro di Alessandria - Università di Oxford - Università di Cambridge - Isaac Newton - Albert Einstein - A tutta birra - A tutta birra II - Tutto Mendel - LIETI CALICI III - Abbazia di Tiglieto - Abbazia di Chiaravalle - The heritage - key - CERN European Organization for Nuclear Research - Science Daily - A caccia di meteore ... - World Digital Library - Library of Congress - Antikitera News - BIBLIOTECA DIGITALE ITALIANA - Il giornale di Galileo - Galileo Galilei - Enciclopedia Egittologica on line - Scienze cartografiche - El - Giza pyramids - Caravaggio - REUTERSNEWS - CNNNEWS - ANSANEWS - English Heritage - NATURE - ENCICLOPEDIA TRECCANI ONLINE - ENCICLOPEDIA BRITANNICA ONLINE - EGYPTIAN ARCHAEOLOGY - PRINCETON UNIVERSITY - NationalGeographicNews - RELIGIONI A CONFRONTO - USHEBTIS EGIPCIOS - Talking Pyramids - LIETI CALICI IV - Sito di ...vino - La Banca del Vino - MATHEMATICA ON LINE - ARKEOMOUNT - Egyptians Gods II - TESTI DELLE PIRAMIDI - DAVID ROBERTS - COLLEZIONI INTERNAZIONALI ON - LINE - LIETI CALICI V - GEOMETRIA SACRA - IPSE DIXIT - THE GRIFFITH INSTITUTE - ARCHIVIO SEGRETO VATICANO - ABBINAMENTI VINO CIBO |
Post n°563 pubblicato il 06 Ottobre 2010 da diegobaratono
Da: "Nasa.gov" NASA Study Sees Earth's Water Cycle Pulse Quickening 10.04.10 Monsoonal rains triggered extensive flooding throughout Pakistan in the summer of 2010, as depicted in this Aug. 18 image from the ASTER instrument on NASA's Terra spacecraft. Scientists predict a speedup in Earth's water cycle will lead to increased precipitation in Earth's tropics, with heavier, more punishing storms. Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team › Full image and caption Freshwater is flowing into Earth's ocean in greater amounts every year, thanks to more frequent and extreme storms related to global warming, according to a first-of-its-kind study by a team of NASA and university researchers. The team, led by Tajdarul Syed of the Indian School of Mines, Dhanbad, India, and formerly with the University of California, Irvine, used NASA and other world-scale satellite observations to track total water volume flowing from the continents into the ocean each month. They found 18 percent more water fed into the world's ocean from rivers and melting polar ice sheets in 2006 than in 1994. The average annual rise was 1.5 percent. "That might not sound like much – 1.5 percent a year – but after a few decades, it's huge," said Jay Famiglietti, UC Irvine Earth system science professor and principal investigator on the study, published this week in the Proceedings of the National Academy of Sciences. He noted that while freshwater is essential to humans and ecosystems, the rain is falling in all the wrong places, for all the wrong reasons. "In general, more water is good," Famiglietti said. "But here's the problem: Not everybody is getting more rainfall, and those who are may not need it. What we're seeing is exactly what the Intergovernmental Panel on Climate Change predicted – that precipitation is increasing in the tropics and the Arctic Circle with heavier, more punishing storms. Meanwhile, hundreds of millions of people live in semiarid regions, and those are drying up." Famiglietti said the evaporation and precipitation cycle taught in grade school is accelerating dangerously because of higher temperatures fueled by greenhouse gases. Hotter weather above the ocean causes freshwater to evaporate faster, which leads to thicker clouds unleashing more powerful storms over land. The resulting rainfall then travels via rivers to the sea in ever-larger amounts, and the cycle begins again. "Many scientists and models have suggested that if the water cycle is intensifying because of climate change, then we should be seeing increasing river flow. Unfortunately, there is no global discharge measurement network, so we have not been able to tell," wrote Famiglietti and Syed. Satellite records of sea-level rise, precipitation and evaporation were used to create a unique 13-year record – the longest and first of its kind. The trends the researchers found were all the same: increased evaporation from the ocean that led to increased precipitation on land and more flow back into the ocean. Among the NASA data used in the ongoing study are measurements from the NASA/European Topex/Poseidon and Jason-1 satellite altimeters and the NASA/German Aerospace Center Gravity Recovery and Climate Experiment (GRACE) satellites. The study is funded by NASA and Earth system science fellowships. "As we turn up the thermostat on planet Earth, it's not just higher temperatures we have to think about," said co-author Josh Willis of NASA's Jet Propulsion Laboratory, Pasadena, Calif. "Long-term changes in rainfall will be a part of climate change too. What we've shown here is that we now have the tools to see global climate change as it occurs – not just the warming, but changes in the hydrological cycle as well." The researchers cautioned that although they had analyzed more than a decade of data, it was still a relatively short time frame. Natural ups and downs that appear in climate data make detecting long-term trends challenging. Further study is needed, they said, and is underway. Other authors of the study include Don Chambers of the University of South Florida, Tampa, Fla.; and Kyle Hilburn of Remote Sensing Systems, Santa Rosa, Calif. For more information, see the UC Irvine news release: http://today.uci.edu/news/2010/10/nr_oceans_101004.php . For more on Topex/Poseidon and Jason-1, visit: http://sealevel.jpl.nasa.gov . For more on GRACE, see: http://www.csr.utexas.edu/grace/ and http://grace.jpl.nasa.gov/ . Alan Buis 818-354-0474
https://blog.libero.it/DiegoBaratono/trackback.php?msg=9352777 I blog che hanno inviato un Trackback a questo messaggio: Nessun Trackback Commenti al Post:
Nessun Commento
|