Outdoor Report for March 9, 2017, By the Wisconsin Department of Natural Resources: “Early Ice-out and Early Wildfire Season
While Wisconsin Governor Scott Walker and his fellow Republicans in the state Legislature, the U.S. Congress, republican governors other U.S. states, plus the president himself, continue to not blame human activities fueled by fossil fuel burning as the cause of the currently accelerating rates of global temperature rises, the record high rates of sea level rise, the acidifying of the planet’s oceans, along with the famine refuge causing droughts in Africa and the Middle East, and the historic melting of ice and snow at the poles and the relentlessly melting of mountainous glaciers, caused mostly by:
excavating, processing and transporting coal, natural gas, auto, truck and ship motor fuels, jet fuel, especially fuels derived from processing and delivering Alberta, Canada, tar sands) and many other human activities that result in large scale emissions of greenhouse gas emissions: cement making, paving forests, meat production, poor waste disposal practices, sports competitions which require long distance travel by teams and fans and awards ceremonies, conventions and conferences that require people to travel long distances, and buying products from long distance markets (requiring distance travel (i.e., not buying local, … the continuing of what the global warming scientists determined to be the “business as usual” practices (above) is slowly but increasing getting worse and worse – with no end in site. Today’s children and those yet to be born will curse us all for this. Mark my words.
March 9, 2017 Wisconsin Department of Natural Resources’ Outdoor Report (partial) follows:
Early ice-out and early wildfire season:
Snow is now gone from most areas of the state, with the exception of the far north, where a few inches remain in wooded areas. Very strong winds this week have taken ice out of many lakes in the south, including Monona and Mendota, which tied its record for second earliest opening — nearly a month earlier than average.
The high winds and loss of snow cover have also led to an early spring wildfire season, with more than 30 acres burning this week, including one fire near Eau Claire that resulted in the evacuation of some homes, but was contained before it burned any structures….
Global Warming is a Local, State, National and International Emergency that Will Only Worsen in Time, Not Get Better
Unfortunately, as the volumes of greenhouse (heat-trapping) gases that are being released to the atmosphere on a daily basis as a result of human activity (mainly from burning coal, natural gas, oil and jet fuel) continue to accumulate there; and Earth’s remaining green space (forests, prairies and other carbon dioxide (CO2) consuming (sequestering) vegetation) is reduced; and Earth’s oceans, seas, the Great Lakes and numerous other water bodies become evermore warmer and saturated with carbon dioxide (CO2), making them more acidic; the prospect of Earth being as hospitable as for life as it has been in the recent millennia in which humans have inhabited this planet is getting slimmer and slimmer.
Scientific studies have been showing for decades, and now with more and more clarity, that modern day living – particularly by residents in the developed countries of the world, who rely so heavily on burning fossil fuels in their daily living – for energy warmth in winter, and electricity generation and transmission, year-round, for shipping goods and trading, and, moreover, for personal or work related travel, the construction, pavement and land alterations that are done which not only allow for that activity, but promote it, that that kind of living by so many millions and even billions of people, will ultimately lead to grave consequences for our planet.
And with our human population continuing to grow geometrically, coupled with the outright refusal of much of the population, their political leaders, and even the recently elected president of our United States of America, Donald J. Trump, continuing to advocate for the highly resource consumptive “business as usual” lifestyle — many human and other lives have already been lost, and people all over the world have suffered, and many more people and animals living in the future will suffer, or be lost, and many trillions of dollars will be lost as well as a result of climate change related “natural” disasters, and rising sea level, a situation which now is not only unprecedented but becoming increasingly dire and predictable.
It’s not like you can just turn the water faucet off and global warming will stop. As stated in Gavin Schmidt and Joshua Wolfe’s comprehensive textbook: “Climate Change – Picture the Science” (2008), it could take centuries and even millennia to reverse it. “even if we act to keep atmospheric concentrations at the same level they are now [atmospheric CO2 concentrations 400 parts per million], the global mean temperature will continue to increase for a few decades as a result of past greenhouse gas emissions [GHGs] and the thermal inertia of the oceans [Water holds heat and releases it much slower than hard surfaces such as cement and asphalt.]”
All we can do now is to slow the pace of global warming by conserving energy obtained either directly or indirectly from burning fossil fuels. Moreover, changing to energy alternatives that don’t add to the rising concentrations of GHGs takes more time and money [but creates more long term jobs], and finding ways to adapt to the changes in the climate and the effects brought about by those changes will also cost money and will hurt the poor and the very young and the more elderly individuals [very young have less body mass to buffer individuals to higher heat; older persons are more susceptible to heat stroke].
“In short, there are no shortcuts to addressing a challenge that is global, pervasive, profound, and long term. Global citizens must grasp the challenge, master its intricacies, and take responsibility, for our own generation, and those to come”.[Jeffrey D. Sachs, New York, 6/16/2008]
Also see “UW-Madison Faculty Challenge DNR Climate Change Revisions”.
The following is from Lee Bergquist of the Milwaukee Journal Sentinel, January 22, 2017:
In a shift from the practice of two other state agencies, Wisconsin emergency management officials have released new information on climate change and its implications for the state.
In a report that it posted online last week, the state Division of Emergency Management devoted extensive attention to climate change and how a warming planet could spur natural disasters such as floods, drought and forest fires.
The report contrasts with the Department of Natural Resources and the state Public Service Commission, which scrubbed mentions of climate change and human-generated greenhouse gases from their websites.
As recently as December, DNR officials removed language from a web page devoted to the Great Lakes that had earlier acknowledged the role humans play in global warming. Officials inserted new wording saying climate change is a matter of scientific debate [Not – true! Truthful scientists will tell you the scientific debate ended years ago. MTN]
The PSC, which regulates electric utilities, eliminated its web page on climate change at some point before May 1, the Milwaukee Journal Sentinel found recently. The scrubbed information included a link to former Gov. Jim Doyle’s task force report on global warming. The Democratic governor’s report in 2008 recommended that Wisconsin reduce the use of fossil fuels and rely more on renewable sources of power. The measures were never enacted.
In the cases of the DNR and the PSC, the information can still be found on the Wayback Machine, an online archive.
In a new five-year disaster preparedness plan, the Division of Emergency Management cites research such as from the Wisconsin Initiative on Climate Change Impacts. It shows global warming is likely to produce more extreme weather. Examples: more days of 90-degree-plus temperatures and more intense rain events.
Bursts of rainfall, the report said, could lead to natural calamities such as flooding, collapse of dams, sinkholes and lake bluff failures.
While other agencies have removed references to the role of human activities in global warming, officials at the Division of Emergency Management included such a statement.
“Although it is widely accepted by the scientific community that the observed changes in global temperatures are the result of human actions, there is considerable uncertainty about the impacts these changes will ultimately have,” the agency wrote.
The document also acknowledges “some debate about the cause of climate change,” but added that statewide temperatures have increased 1.1 degrees in the past 50 years and that more extreme weather events are likely.
The new planning document was approved in December by the Federal Emergency Management Agency, said Lori Getter, spokeswoman for the state Division of Emergency Management.
Wisconsin was one of the first states to complete a new plan. As part of the process, FEMA required states to consider potential climate effects, she said.
Big Time Media Blew It Big Time – They Failed to Fact Check Donald Trump’s Denial of Human-caused Global Warming
President-elect Donald Trump’s pre and post U. S. Presidential Election statements describing his unscientific “belief” that global warming is not human-caused is flat wrong and the media should have corrected him. It is a scientifically accepted truism that human activity – especially coal and natural gas (methane) burning to generate electricity, petroleum product burning including automobile gasoline, diesel and jet fuel burning, the latter for use by the U. S.’s military aircraft, commercial airplanes and private jets, and humans having either paved over or replaced billions of acres of land formerly in tropical rain forests, prairies, wilderness, or in other lands containing carbon dioxide sequestering vegetation with greenhouse gas producing uses by humans.industries resulting changes in the climates on all of the Earth’s continents, the rising sea levels, worldwide, due to the measured acceleration of the melting of all the Earth’s glaciers, most notably Greenland’s, massive GreenlandIce Sheet are very wrong and very threatening to our planet. Global warming, which is known to be an inevitable consequence of increased trapping of radiated heat energy at the earth’s surface which originates from the sun, due to the known increase in the volume of greenhouse gases (carbon dioxide, nitrous oxide, methane, and other human engineered trace gases), primarily caused from excessive burning of fossil fuels over time, and by the paving over of the planet’s land surface, is factually undeniable.
The U. S. mass media (TV, radio, newspapers, social media, other) are most responsible for Trump’s deception filled presidential election victory, which will exacerbate global warming heaviest toll on the children of today, future generations of people and other living things having no choice but to struggle to live on a much more inhospitable planet which is destined to become more and more unlivable as time goes on – because of our uncaring actions of excessive fossil fuel burning today.
People in the U.S. and elsewhere could do so much more than they’re currently doing to stop projects such as the Dakota Pipeline project, and other environmentally disastrous energy, transportation, and natural resource consuming unsustainable projects with countless unintended negative consequences that will unquestionably hurt the living conditions for people and all other life on Earth by simply making more thoughtful decisions in how and where they choose to live, recreate, work, travel, etc.
In particular, it is essential for all to MINIMIZE the burning of oil (fossil fuels) in recreational and other needless travel, especially long distance travel, by jet airplane and daily solo motor vehicle commuter travel. In that way, we all reduce the economic need oil and other fossil fuel extraction and pipeline projects, reducing the eventual burning of the fossil fuels and adding to the already catastrophic volumes of atmospheric greenhouse gases, scientifically established to be warming our planet, melting the earth’s polar ice caps, and virtually all the world’s glaciers, thus causing sea levels to rise, the oceans and the earth’s other water bodies to warm and acidify, killing off an untold number of earth’s species, including significant degradation of earth’s many wonders such as the Great Barrier Reef to say nothing about the countless loss of life and human suffering caused by the increase in extreme weather events including droughts, flooding and severe storms such as have already been transpiring across the globe including the heavy costs borne by our own United States over the past year and right now. The losses already occurring to the world and its people and other life on the planet are beyond measure yet our political representative are doing virtually nothing to stop this terrible tragedy to our planet and its future and those who will have no choice but to call it their home.
Please sign my petition for the U.S. Congress to establish and sufficiently fund federal and state programs that would offer the American public monetary incentives to reduce their unsustainable travel levels. Tell your elected representative to legislative act now before it’s too late! http://www.allthingsenvironmental.com.
Please do not patronize TV networks. Their so called “news” programs, sports coverage, and many other programs are financed heavily from automobile industry commercials, while Wisconsin Public Radio and Wisconsin Public Television are funded by the travel industry, heavily promoting airline and long distance travel motorized travel, which contributes huge volumes of greenhouse gas emissions, from jets,automobiles and other fossil fuel powered vehicles, mostly for recreational purposes, leaving a permanent, indelible mark for succeeding generations live with. National Public Radio is funded by the Koch Brothers. They all say they are “neutral” on political issues. But Climate Change is Science. It is continuing and in fact accelerating, regardless if the president-elect believes in it or not. To say otherwise does not comport with the facts.
Either we act now or life as we know it on this planet may soon be history.
“The Sun will never disappear, but the Earth may not have many years…. Remember, Today… Well well well, oh, well”
– John Lennon (9 October 1940 -8 December 1980), musician, peace activist, artist, band leader of rock band “The Beatles” and founder of “The Plastic Ono Band”, humanist, dreamer … murder victim.
Global Warming Causing Declines of Fisheries in Lake Tanganyika
The people in the small fishing village along the shore of Lake Tanganyika rely heavily on the small sardines from the lake for their own food and also probably sell them dried in a nearby market. Credit: Andrew S. Cohen/ University of Arizona
The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing,according to a new report. The lake was becoming warmer at the same time in the 1800s that the abundance of fish began declining and the lake’s algae started decreasing. Large-scale commercial fishing did not begin on Lake Tanganyika until the 1950s.
The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing, according to a new report from an international team led by a University of Arizona geoscientist.
The lake was becoming warmer at the same time in the 1800s the abundance of fish began declining, the team found. The lake’s algae — fish food — also started decreasing at that time.
The new finding helps illuminate why the lake’s fisheries are foundering, said study leader Andrew S. Cohen, a UA Distinguished Professor of Geosciences.
“Some people say the problem for the Lake Tanganyika fishery is ‘too many fishing boats,’ but our work shows the decline in fish has been going on since the 19th century,” Cohen said. “We can see this decline in the numbers of fossil fish going down in parallel with the rise in water temperature.”
Instead of Climate Change Legislation, Wisconsin’s Legislature and Governor Pass Laws to Relax or Prohibit Protection of State’s 15,074 Lakes, Rivers and Streams
Just in the past year, the GOP-led Wisconsin Legislature, at the behest of mainly agriculture, construction and real estate interests, has approved numerous bills to relax or prohibit state and local efforts to regulate, safeguard or even monitor the state’s lakes, rivers, and streams. Between January 2011 and December 2015, those special interests contributed about $2.7 million to Republican legislators and nearly $9 million to Republican Gov. Scott Walker.
Here are a few of those controversial measures:
Assembly Bill 603, which creates new standards for placing structures along the shores of lakes and rivers, and prohibits counties from using zoning ordinances to regulate or restrict shoreline construction projects, like boathouses and fishing rafts, among others. The measure, which was backed by agriculture, construction and real estate interests, was signed into law by Walker.
The 2015-17 state budget, which was approved by the legislature and signed by Walker last summer, prohibits Dane County from making wastewater, sewage and other water quality decisions. Instead, the Department of Natural Resources is in charge of water quality decisions for Dane County. The DNR is required to base its decisions on water quality standards outlined in state law, rather than stricter local standards, and to make decisions on applications to revise the plan for new real estate developments within 90 days. The DNR is also banned from working with the county or its other local governments on the water quality plan or changes to it. The non-fiscal measure was tucked into the budget and passed at the request of developers.
The 2015-17 state budget, which prohibits counties from adopting zoning rules stricter than state law when it comes to what shoreline property owners can do with their property. Zoning rules govern how close structures can be to water, lot sizes, building maintenance, and vegetation, among other things, in order to protect water quality in streams, rivers, and lakes. The plan strips at least 20 counties of their right to have zoning and shoreland protection rules stricter than state law. The non-spending measure was inserted into the budget with the backing of construction and real estate interests.
Senate Bill 459, which loosens state regulations and restricts local control involving waterways and the land around them, dry lake beds, wetlands, storm water control systems and other man-made ditches, and rules governing the repair of piers and boathouses. The measure, which was approved by the legislature and sent to Walker, is backed by agriculture, construction, real estate, and business interests.
SB493, which would reduce the state’s authority to regulate fish farms. The measure, which was approved and sent to Walker, expands the permissible bodies of water where fish farms can be built; loosens requirements on the amount of water that dams on fish farms may control or discharge; and exempts man-made ponds, wetlands, and roads on fish farms from DNR permit requirements. The measure was backed by the agriculture and restaurant industries.
Text from Wisconsin Democracy Campaign
Lake Temperature Data Over Decades Show Warming
Large, increasing methane emissions from northern lakes:
Methane is increasing in the atmosphere, but many sources are poorly understood. Lakes at high northern latitudes are such a source. However, this may change with a new study published in Nature Geoscience. By compiling previously reported measurements made at a total of 733 northern water bodies — from small ponds formed by beavers to large lakes formed by permafrost thaw or ice-sheets — researchers are able to more accurately estimate emissions over large scales.
“The release of methane from northern lakes and ponds needs to be taken seriously. These waters are significant, contemporary sources because they cover large parts of the landscape. They are also likely to emit even more methane in the future,” says Martin Wik, PhD student at the Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, who led the study.
With climate warming, particularly at high northern latitudes, longer ice-free seasons in combination with permafrost thaw is likely to fuel methane release from lakes, potentially causing their emissions to increase 20-50 precent before the end of this century. Such a change would likely generate a positive feedback on future warming, causing emissions to increase even further.
“This means that efforts to reduce human induced warming are even more urgent in order to minimize this type of feedback of natural greenhouse gas emissions. In a sense, every reduction in emissions from fossil fuels is a double victory,” says David Bastviken, Professor at Tema Environmental Change, Linköping University.
Source: January 4, 2016 – Stockholm University, ScienceDaily.com.
Climate change is rapidly warming lakes around the world, threatening freshwater supplies and ecosystems, according to a study spanning six continents.
The study is the largest of its kind and the first to use a combination of satellite temperature data and long-term ground measurements. A total of 235 lakes, representing more than half of the world’s freshwater supply, were monitored for at least 25 years. The research, published in Geophysical Research Letters, was announced today at the American Geophysical Union meeting.
The study, which was funded by NASA and the National Science Foundation, found lakes are warming an average of 0.61 degrees Fahrenheit (0.34 degrees Celsius) each decade. That’s greater than the warming rate of either the ocean or the atmosphere, and it can have profound effects, the scientists say.
Algal blooms, which can ultimately rob water of oxygen, are projected to increase 20 percent in lakes over the next century as warming rates increase. Algal blooms that are toxic to fish and animals would increase by 5 percent. If these rates continue, emissions of methane, a greenhouse gas 25 times more powerful than carbon dioxide on 100-year time scales, will increase 4 percent over the next decade.
“Society depends on surface water for the vast majority of human uses,” said co-author Stephanie Hampton, director of Washington State University’s Center for Environmental Research, Education and Outreach in Pullman. “Not just for drinking water, but manufacturing, for energy production, for irrigation of our crops. Protein from freshwater fish is especially important in the developing world.”
The temperature of water influences a host of its other properties critical to the health and viability of ecosystems. When temperature swings quickly and widely from the norm, life forms in a lake can change dramatically and even disappear.
“‘These results suggest that large changes in our lakes are not only unavoidable, but are probably already happening,” said lead author Catherine O’Reilly, associate professor of geology at Illinois State University, Normal. Earlier research by O’Reilly has seen declining productivity in lakes with rising temperatures.
Temperature increases close to or above the average .61 degrees F rise were seen in some of the world’s most popular waters, including Lake Tahoe (+.97 F by hand, +1.28 by satellite), the Dead Sea (+1.13 F), two reservoirs serving New York City, Seattle’s Lake Washington (+.49 F), and the Great Lakes Huron (+1.53 F by hand, +.79 by satellite), Michigan (+.76 F by hand, +.36 by satellite), Ontario (+.59 F) and Superior (+2.09 F by hand measurement, +1.44 F by satellite).
Study co-author Simon Hook, science division manager at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., said satellite measurements provide a broad view of lake temperatures over the entire globe. But they only measure surface temperature, while hand measurements can detect temperature changes throughout a lake. Also, while satellite measurements go back 30 years, some lake measurements go back more than a century.
“Combining the ground and satellite measurements provides the most comprehensive view of how lake temperatures are changing around the world,” he said.
The researchers said various climate factors are associated with the warming trend. In northern climates, lakes are losing their ice cover earlier, and many areas of the world have less cloud cover, exposing their waters more to the sun’s warming rays.
Previous work by Hook using satellite data indicated that many lake temperatures were warming faster than air temperature and that the greatest warming was observed at high latitudes, as seen in other climate warming studies. This new research confirmed those observations, with average warming rates of 1.3 degrees Fahrenheit (0.72 degrees Celsius) per decade at high latitudes.
Warm-water, tropical lakes may be seeing less dramatic temperature increases, but increased warming of these lakes can still have large negative impacts on fish. That can be particularly important in the African Great Lakes, where fish is an important source of food.
“We want to be careful that we don’t dismiss some of these lower rates of change,” said Hampton. “In warmer lakes, those temperature changes can be really important. They can be just as important as a higher rate of change in a cooler lake.”
In general, the researchers write, “The pervasive and rapid warming observed here signals the urgent need to incorporate climate impacts into vulnerability assessments and adaptation efforts for lakes.”
The Great Lakes are some of the world’s fastest warming lakes.
The decline of Great Lakes ice cover over the past several decades is contributing significantly to the rate of increase of summer water temperature, the study said.
The data also shows the world’s lakes are warming faster than the air around the lakes.
The study, published in the Geophysical Research Letters, finds that Lake Superior is warming the fastest of any of the Great Lakes.
The downside to warming waters is a more rapidly changing Great Lakes ecology. Warmer waters can negatively effect some native Great Lakes species, and increase invasive species.
Lake Superior is warming at a rate of 2.1°F per decade, according to the study.
Northern Lake Michigan is warming 0.4°F per decade, while southern Lake Michigan is warming at 0.76°F.
Northern Lake Huron is warming faster than southern Lake Huron. Northern Lake Huron is warming at a rate of 1.5°F and southern Lake Huron .79°F.
Lake Ontario is warming at .59°F per decade.
Lake Erie has been the slowest to warm at 0.15°F per decade.
The study looked at data from 1985 to 2009. It used satellite data, and actual water and air temperature measurements from buoys on the Great Lakes.
One would think the water would warm at the same rate as the air above it. The study showed this is not the case. Great Lakes water temperatures are actually rising about 50 percent faster than the overlying air temperatures.
An increasing number of ice-free days on each Great Lake are a major culprit in the warming, the study said. Lack of ice causes summer stratification of the water to occur earlier in the summer. Once summer stratification occurs, Great Lakes waters can warm faster on the surface.
Summer stratification means the water is warmer on the top surface of a lake, and then gets colder in gradually deeper water. This stratification develops during the spring and early summer. Coming out of winter, the surface water is coldest, and maybe ice covered, and the water gets warmer as you go to deeper depths. The temperature pattern then flip-flops heading into summer.
An older study found that this summer stratification is occurring nearly 14 days earlier in the last 27 years.
Although 2.1°F warming over a decade may not sound like a lot, that’s a 4.5°F water temperature rise on Lake Superior since 1979.
The study exemplifies the interdisciplinary work of WSU’s Grand Challenges, areas of research addressing some of society’s most complex issues. The study is also in keeping with the theme of the challenge “Sustainable Resources: Food, Energy, and Water,” which will develop strategies that link optimized agricultural practices, water management, and energy production.
Washington State University – reported in ScienceDaily.com
Mark Torregrossa | firstname.lastname@example.org
150-year global ice record reveals major warming trend
September 7, 2000 By Brian Mattmiller
Sources as diverse as newspaper archives, transportation ledgers and religious observances, scientists have amassed lake and river ice records spanning the Northern Hemisphere that show a steady 150-year warming trend.
The study, which includes 39 records of either freeze dates or breakup dates from 1846 to 1995, represents one of the largest and longest records of observable climate data ever assembled. University limnologist John Magnuson led a team of 13 co-authors who contributed to the report, to be published in the Sept. 8 issue of the journal Science.
Sites ranges from Canada, Europe, Russia and Japan. Of those, 38 indicate a consistent warming pattern. The average rate of change over the 150-year period was 8.7 days later for freeze dates; and 9.8 days earlier for breakup dates. A smaller collection of records going well past 150 years also show a warming trend, at a slower rate.
“We think this is a very robust observation: It is clearly getting warmer in the Northern Hemisphere,” says Magnuson. “The importance of these records is that they come from very simple, direct human observations, making them very difficult to refute in any general way.”
Magnuson says the observational nature of the study is “both its strength and its weakness,” and the results do not offer specific proof that greenhouse gases are driving the warming trend. However, the findings are consistent with computer-generated models that have been developed to estimate climate change from greenhouse gases over a 125-year time period, he says.
The findings also correspond to an air temperature increase of 1.8 degrees Celsius over the past 150 years. A temperature change of 0.2 degrees Celsius typically translates to a one-day change in ice-on and ice-off dates.
Freeze dates were defined in the study as the observed period the lake or river was completely ice-covered; the breakup date was defined as the last ice breakup observed before the summer open-water phase.
Ice records have valuable attributes for climate researchers, Magnuson says. They can be gathered across a wide range of the globe, and in areas traditionally without weather stations. Their primary weakness is that early observers did not document the methods used.
“Of course, 10,000 years ago the Midwest was covered by ice, so we know it’s getting warmer,” he says. “What’s troubling and scary to people is that these rates in recent decades are so much faster.”
Climate models have predicted a doubling of total greenhouse gases in the next 30 years or so, a change that could potentially move the climate boundaries for fish and other organisms northward by about 300 miles, approximately the length of the state of Wisconsin, Magnuson says.
The records in this study are part of a decade-long project led by Magnuson and the UW–Madison Center for Limnology to build a database of lake and river ice records from around the world. The project was supported by the National Science Foundation’s Long-Term Ecological Research program, which emphasizes tracking and understanding global changes.
“It’s kind of a new science, you might call it network science,” Magnuson says. “We reached out to colleagues around the world and asked for these records. It turned out some people had very rich stores of data.”
The records in this study represent the longest and most intact of 746 records collected through the project. Some individual records are of astonishing lengths, with one dating back to the 9th century, another to the 15th century and two more to the early 1700s.
For example, Lake Suwa in Japan has a record dating back to 1443 that was kept by holy people of the Shinto religion. The religion had shrines on either side of the lake. Ice cover was recorded because of the belief that ice allowed deities on either side of the lake — one male, one female — to get together.
Lake Constance, a large lake on the border of Germany and Switzerland, has a peculiar record dating back to the 9th century. Two churches, one in either country, had a tradition of carrying a Madonna figure across the lake to the alternate church each year it froze.
Two other long records come from Canada’s Red and McKenzie rivers, which date back to the early 1700s and were kept because ice cover and open water were critical to the fur trade. Records from Grand Traverse Bay and Toronto Harbor, both on the shores of the Great Lakes, reflect their prominence as shipping ports.
Other records included in the study are from lakes Mendota, Monona and Geneva from Wisconsin; lakes Detroit and Minnetonka from Minnesota; lakes Oneida from New York and Moosehead from Maine; Lake Kallavesi from Finland; and the Angara River and Lake Baikal from eastern Russia.
Another finding in the study, based on the 184 ice records from 1950 to 1995, showed the variability in freeze and breakup dates increased in the last three decades. Magnuson says it might be related to intensification of global climate drivers such as the El Nino /La Nina effects in the Pacific Ocean.
Magnuson says the ecological effects of global warming are only beginning to be studied. But studies already exist that have shown the northern ranges of some butterflies and birds have been extending northward.
Source: University of Wisconsin – Madison