However, surface air temperatures north of 65oN have been warning at roughly twice the global rate for the last four decades (1965-2005). The warming of the atmosphere, which leads to warmer soils, seems to be having an effect on the Arctic tree line – the boundary between the boreal forest and the tundra. Evidence for an advance of the tree line has been found in Alaska. Studies of the age of trees along transects that cross the tree line from the forest to the tundra show that that they becoming progressively younger. This indicates tree line advance, with a consequent movement north of associated species – for example lichens, mosses, fungi and birds such as the woodpeckers.
These gases, with carbon dioxide being the main culprit, prevent solar heat from escaping the earth’s atmosphere, resulting in a rise in temperature, or the greenhouse effect. Already scientists around the world are detecting the numerous and dangerous effects of global warming (Johnson 18). Through these different leaks and spills our Canadian environment is slowly being negatively effected. The impacts of global warming on the Canadian environment are immense. Some of these impacts include ice bridges melting, and will have to be replaced with traditional building materials.
Not just one area but globally! That would give us a better indication of global warming. Artic sea ice is another thing we should be monitoring. “September Arctic sea ice is now declining at a rate of 11.5 percent per decade, relative to the 1979 to 2000 average” (Global Climate Change: Key Indicators, 2014). Due to, again warmer temperatures both maximum and minimum we are seeing ice melt.
We should be concerned about this phenomenon because we never know when the climate may change again it may be cold one minute then next it may be so hot that it may be unbearable to stand. Crops getting destroyed, people falling over because of the heat wave. The word Flip-Flop is used to describe a climate change when it happens. Calvin claims that conditions in the North Atlantic Ocean are at the center of concern over climate flip-flop and here are the conditions and why they were caused and why were they dangers: If the climate switches then it can disrupt the food-supply routine and only two percent of the ninety-eight percent can eat. The system allows for a large urban population in the best of time, but not in the case of widespread disruptions.
Final Paper: Reconstruction of The Changing Arctic Brett Wegleitner Concordia College The 21st century has been one of many changes in both the environment and how nations will forever change the Arctic, as it is now perceived. The arctic is one of the most fragile places on Earth as it holds the key to many new resources that have barely been touched and also a huge commodity for countries that would like to exploit the Arctic waters as new shipping lanes emerge due to global climate change. Climate change has been the largest factor in the changing Arctic as the ice is retreating further and allowing for more ships to have access and for corporations to begin extracting hydrocarbons to be shipped all over the world as we become more
ABSTRACT Global warming causes many changes in weather patterns including greater temperature variability and more extreme temperatures. In this study we examined the damage and recovery in Aesculus glabra (Ohio buckeye) in Trelease Woods after a late frost in the spring of 2007, potentially caused by global warming. 1) If temperature and wind gradients directly affect the pattern of damage and recovery of Ohio buckeye, then as the distance of Ohio buckeye from the forest edge increases the percent leaf damage done by frost will decrease. 2) If the total leaf area available for photosynthesis in an Ohio buckeye directly affects its recovery from frost damage, then as percent leaf damage increases, recovery (based on percent canopy fullness,
Global warming has been a giant issue in our world today the rising of seas, melting of ice caps, experiencing some of the worst natural disasters in centuries. We have known of this since 1980 to be exact. I've just got done reading two really good articles on global warming. Two articles that I read were Greenland Ice Cores: Frozen in time and the other article is named the Rising Seas . These two articles really informed me on whats happening in the world due to global warming.
But if my opponents did any research, they would realize that there is plenty of evidence to show that global warming is a real threat to this earth. In his essay “Now Or Never”, Bill McKibben writes: Consider hydrology, for instance. Warm air holds more water vapor the cold air, so there is an increase in evaporation in dry areas, and hence more drought—something that has been documented on every continent. Once that water is in the atmosphere, it’s going to come down someone—and indeed we have seen the most dramatic flooding ever recorded in recent years. In 1998, 300 million humans, one in twenty of us, had to leave their homes for a week, and month, a year, forever because of rising waters.
Global Warming and the Polar Bear Works Cited Missing It was realized that in 1988 that mankind was transforming the atmosphere of our planet (Pearce, 1). Global Warming is a big concern to scientists aside from pollution and is certainly under way. According to the National Academy of Sciences, the Earth's surface temperature has risen by about 1 degree Fahrenheit in the past century, with accelerated warming during the past two decades. Global warming has risen within the last 50 years because of the result of humans activities. These activities have distorted the chemical composition of the atmosphere through the buildup of greenhouse gases – primarily carbon dioxide, methane, and nitrous oxide (EPA, The Climate).
Over the past 43 years, Michigan has been the second-fastest-warming state in the country, followed by Minnesota and Wisconsin (Kalish, 2012). From 193 to 2011 the annual ice coverage as declined drastically. Reduced ice cover can have large impacts on the health of Lake Huron. Increased light penetration promotes algae growth and the survival of invasive species. Without ice and snow coverage, the lakes suffer from water loss due to increased evaporation.