Las tormentas solares Las tormentas solares se producen cuando el ciclo solar alcanza su máxima actividad y justo después. Es decir, cuando la actividad magnética del Sol es más fuerte y comienza a descender. Hay un máximo solar cada 11 años. El último comenzó a finales del año 2.012 y se prolongó durante el 2.013. Las tormentas solares consisten en violentas explosiones de plasma y de partículas cargadas, llamadas fulguraciones y, sobre todo, eyecciones de masa coronal. La actividad magnética del Sol hace que se formen bucles de plasma en su superficie. Durante una tormenta solar, se expulsan y se expanden por todo el Sistema Solar millones de toneladas de plasma y partículas cargadas, junto con gran cantidad de rayos X y gamma, la radiación más potente que existe. Las partículas cargadas tardan en alcanzarnos de uno a tres días, aunque a veces llegan en sólo unas horas. Aún no es posible predecir cuándo se producirá una tormenta solar.
Global Warming Effects Map - Effects of Global Warming Sea Levels Rising Fast on U.S. East Coast Charles Q. Choi (Also see "New York, Boston 'Directly in Path' of Sea Level Rise." ) Sea levels worldwide are expected to rise as global warming melts ice and causes water to expand. Those levels, though, are expected to vary from place to place, due to factors such as ocean currents, differences in seawater temperature and saltiness, and the Earth 's shape. Now it seems scientists have pinpointed just such a variance. Analyzing tide-level data from much of North America, U.S. Global sea level rise averaged about 0.6 to 1 millimeter annually over the same period. "If you talk with residents of this hot spot area in their 70s or 80s who've lived there all their lives, they'll tell you water is coming higher now in winter storms than it ever did before," said study co-author Peter Howd , an oceanographer contracted with the USGS. "We're now finally getting to the point where we can measure their observations with our highfalutin scientific instruments." (Sea sea level rise pictures .)
Expedition | A Student's Guide to Global Climate Change Get your passport ready! It's time to go on a trip around to world to explore the effects of climate change. Each flag on the map below represents a stop on your journey, and you can visit them in any order you like. You'll see a short video at each stop... and you'll also need to complete a few challenges along the way! Accessible version for screen reader user Before you begin... (<a href="expedition-popup-alt.html">Alternative version</a>) <a href="expeditions-508.html">Accessible version of all the expeditions</a> Map Data Imagery ©2015 NASA Satellite Map Select any flag on the map to start your journey! At the end of each stop, you'll get a passport stamp and a code. How Does this Expedition Work? At each stop on your journey, you'll see a 5– to 10–minute video. Depending on your Internet connection speed, the video might pause occasionally to allow the rest of the file to download. Each video will pause a few times to ask you a question. Enter your codes on the tracking sheet.
Sist solar 2 Effects Global climate change has already had observable effects on the environment. Glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plant and animal ranges have shifted and trees are flowering sooner. Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves. Taken as a whole, the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time. Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to greenhouse gases produced by human activities. According to the IPCC, the extent of climate change effects on individual regions will vary over time and with the ability of different societal and environmental systems to mitigate or adapt to change. Future effects Change will continue through this century and beyond
Scientists warn US east coast over accelerated sea level rise | Environment A stormy Atlantic ocean hits the coast of Buxton, North Carolina. Photographer: Ted Richardson/Bloomberg via Getty Images Sea level rise is accelerating three to four times faster along the densely populated east coast of the US than other US coasts, scientists have discovered. The zone, dubbed a "hotspot" by the researchers, means the ocean from Boston to New York to North Carolina is set to experience a rise up a third greater than that seen globally. Asbury Sallenger, at the US geological survey at St Petersburg, Florida, who led the new study, said: "That makes storm surges that much higher and the reach of the waves that crash onto the coast that much higher. The hotspot had been predicted by computer modelling, but Sallenger said: "Our paper is the first to focus on using real data to show [the acceleration] is happening now and that we can detect it now." The impacts of the rising seas are potentially devastating, said the scientists.
Climate Change | Island Institute A Climate of Change Workshop | Ocean Acidification Island and coastal communities are on the front line of environmental changes associated with climate change and ocean acidification. Across New England, fishermen and scientists are observing notable shifts in the ecosystem and dramatic changes in the number of fish in the water. We do this by: Helping fishermen and communities document the environmental shifts being seen;Helping communities and fisheries managers understand the shifts they are seeing in the broader context of a changing Gulf of Maine by convening conversations with multiple perspectives from fishermen, scientists, and managers;Helping fishermen and communities communicate these shifts to policy makers whose decisions could be informed by their input;Helping fishermen develop more resilient fishing businesses so that they can better withstand shifts in the ecosystem. A Climate of Change Workshop View the full Climate of Change Workshop Report Video Series
Sist solar Climate change: the effects on ocean animals The “poster child” for global warming is the polar bear. But many other animals are already feeling the effects of global climate change on the oceans. Find out about the changing climate's impact on the earth’s population of sea turtles, right whales, penguins, seals, lobsters, and cod. The Arctic’s top predator, the polar bear, is affected both by the reduction in sea ice and by reduced stocks of its primary food, the ringed seal. Polar bears use sea ice as a platform for hunting their prey and for resting. They catch adult seals when they come up through the holes in the sea ice and search out the snow-covered ice caves of seal pups. But sea ice is decreasing throughout their Arctic range due to climate change. As sea ice becomes thinner and multi-year ice disappears, a greater proportion of females make their dens on land, expending more energy to get there. Polar bears are often described as completely dependent on ice for their survival. In 2008, the U.S. Back to top
Change and Sea Level Rise Melting of Glaciers and Ice Sheets One of the most pronounced effects of climate change has been melting of masses of ice around the world. Glaciers and ice sheets are large, slow-moving assemblages of ice that cover about 10% of the world’s land area and exist on every continent except Australia. Over the past century, most of the world’s mountain glaciers and the ice sheets in both Greenland and Antarctica have lost mass. One of the best-documented examples of glacial retreat has been on Mount Kilimanjaro in Africa. Image from global-greenhouse-warming.com When researching glacial melting, scientists must consider not only how much ice is being lost, but also how quickly. Image from UNEP In Antarctica, recent estimates show a sharp contrast between what is occurring in the East and West Antarctic Ice Sheets. Impacts The melting back of the glaciers and ice sheets has two major impacts. Sea Level Rise Image from NASA Causes of sea level rise Image from wildwildweather.com Ocean Acidification
Current sea level rise Trends in global average absolute sea level, 1870–2008.[1] Changes in sea level since the end of the last glacial episode. Current sea level rise is about 3 mm/year worldwide. According to the US National Oceanic and Atmospheric Administration (NOAA), "this is a significantly larger rate than the sea-level rise averaged over the last several thousand years", and the rate may be increasing.[2] This rise in sea levels around the world potentially affects human populations in coastal and island regions[3] and natural environments like marine ecosystems.[4] Between 1870 and 2004, global average sea levels rose 195 mm (7.7 in), 1.46 mm (0.057 in) per year.[5] From 1950 to 2009, measurements show an average annual rise in sea level of 1.7 ± 0.3 mm per year, with satellite data showing a rise of 3.3 ± 0.4 mm per year from 1993 to 2009,[6] a faster rate of increase than previously estimated.[7] It is unclear whether the increased rate reflects an increase in the underlying long-term trend.[8]