Whats Happening to Our Climate ?
YOUTUBE: https://www.youtube.com/watch?NR=1&feature=endscreen&v=CR9Hm66i2ug
Published on Nov 1, 2012 by DiscloseTruthTV
Art welcomed leading climate science researcher Brenda Ekwurzel, who addressed global warming, what's really going on with the climate. According to Ekwurzel, man has contributed significantly to global warming by pouring an "unprecedented level of heat-trapping gases [into] our atmosphere." We're driving the climate more than natural cycles or the sun, she explained, pointing to the recent Intergovernmental Panel on Climate Change (IPCC) report which suggested more than 50% of the observed increase in globally averaged temperature was due to man.YOUTUBE: https://www.youtube.com/watch?NR=1&feature=endscreen&v=CR9Hm66i2ug
Published on Nov 1, 2012 by DiscloseTruthTV
If global warming continues unabated, Ekwurzel warned, we could expect the continued melting of inland glaciers and the Arctic sea ice, which she said were disappearing at a rate "way beyond the natural variability." The sea levels will rise, she continued, making coastal areas more likely to experience devastating storm surges and overtaking some islands entirely.
To avoid reaching the tipping point, Ekwurzel said we must prevent the global average temperature from increasing more than 2 degrees Fahrenheit.
Prior to joining UCS, Dr. Ekwurzel was on the faculty of the University of Arizona Department of Hydrology and Water Resources with a joint appointment in the Geosciences Department. Her specialty is isotope geochemistry, a tool she has used to study climate variability in places as disparate as the Arctic Ocean and the desert Southwest. She has published on topics that include climate variability and fire, isotopic dating of groundwater, Arctic Ocean tracer oceanography, paleohydrology, and coastal sediment erosion. She has also worked as a hydrologist with the Connecticut Department of Environmental Protection, working with communities to protect groundwater sources.
Dr. Ekwurzel completed her doctorate work at Lamont-Doherty Earth Observatory of Columbia University and post-doctoral research at Lawrence Livermore National Laboratory in California.
A tropical cyclone is a storm system characterized by a low-pressure center surrounded by a spiral arrangement of thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic windstorms such as nor'easters, European windstorms, and polar lows. The characteristic that separates tropical cyclones from other cyclonic systems is that at any height in the atmosphere, the center of a tropical cyclone will be warmer than its surroundings; a phenomenon called "warm core" storm systems.
The term "tropical" refers both to the geographical origin of these systems, which usually form in tropical regions of the globe, and to their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with counterclockwise wind flow in the Northern Hemisphere and clockwise wind flow in the Southern Hemisphere. The opposite direction of the wind flow is a result of the Coriolis force. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane (/ˈhʌrɨkeɪn/, /ˈhʌrɨkən/), typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone.
While tropical cyclones can produce extremely powerful winds and torrential rain, they are also able to produce high waves, damaging storm surge, and tornadoes. They develop over large bodies of warm water, and lose their strength if they move over land due to increased surface friction and loss of the warm ocean as an energy source. This is why coastal regions can receive significant damage from a tropical cyclone, while inland regions are relatively safe from receiving strong winds. Heavy rains, however, can produce significant flooding inland, and storm surges can produce extensive coastal flooding up to 40 kilometres (25 mi) from the coastline. Although their effects on human populations can be devastating, tropical cyclones can relieve drought conditions. They also carry heat energy away from the tropics and transport it toward temperate latitudes, which makes them an important part of the global atmospheric circulation mechanism. As a result, tropical cyclones help to maintain equilibrium in the Earth's troposphere, and to maintain a relatively stable and warm temperature worldwide.
The effects of global warming are the ecological and social changes caused by the rise in global temperatures. According to the Intergovernmental Panel on Climate Change, most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in human greenhouse gas concentrations. Projections of future climate change suggest further global warming, sea level rise, and an increase in the frequency of some extreme weather events.