Sentences with phrase «higher lake temperatures»

Higher lake temperatures may speed the conversion of carbon - rich organic matter in lake sediments into methane and carbon dioxide, gases that once released into the atmosphere could exacerbate global warming.

Not exact matches

Chicago Park District officials said high lake water temperatures and windless days likely contributed to high bacteria levels that forced them to ban swimming at all the city's beaches Monday.

In Chicago, the Park District will use a new high - tech system that uses computer software to give real - time predictions of bacteria counts based on such factors as water temperature, modeling of the lake bottom and wave action monitored by buoys.

• Lake Erie's water temperatures are higher and there's less ice cover.

This year, the waters in Lake Superior are on track to reach — and potentially exceed — the lake's record - high temperature of 68 degrees FahrenLake Superior are on track to reach — and potentially exceed — the lake's record - high temperature of 68 degrees Fahrenlake's record - high temperature of 68 degrees Fahrenheit

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.

Factors such as overfishing may also play a role, but a study published last August in Proceedings of the National Academy of Sciences found that lake temperatures in the last century were the highest of at least the previous 500 years.

This is especially true for lakes at high latitudes that are covered in ice each winter but may see less ice as temperatures rise.

An ancient record Assessing lake sediment cores from the region reaching 15,000 years into the past, a Montana State University team found whitebark pines more abundant despite higher summer temperatures and fire frequency than today.

Another factor at play could be the delicate balance between precipitation and evaporation which Arctic lake levels depend on: warmer temperatures and higher winds could cause more evaporation.

Lava lakes directly exposed to space without an atmosphere would create local hot spots of high temperatures, so they are not the best explanation for the Spitzer observations, scientists said.

«1C rise in atmospheric temperature causes rapid changes to world's largest High Arctic lake: An interdisciplinary team of scientists explores Lake Hazen's response to climate change.&ralake: An interdisciplinary team of scientists explores Lake Hazen's response to climate change.&raLake Hazen's response to climate change.»

The other species, E. verrucosus, produces far fewer heat shock proteins and instead migrates to deeper, cooler regions of the lake to escape high water temperatures.

The all - time daily average high temperature record for Lake Superior is 71 °F, which was recorded in mid-August 2010.

Capital Weather Gang examined summer temperatures examined summer temperatures following the five highest ice years on the Great Lakes and found that they were below normal for much of the Midwest and Mid-Atlantic.

As you well know, overall, it's been a warm start to winter across the U.S. Just this past week, record high temperatures were falling from the Great Lakes through the Mid-Atlantic and up into the Northeast.

Higher temperatures lead to more evaporation from lakes, rivers and oceans, and warmer air can hold more moisture.

No. 3 Corvette C6.R Continues Hot Streak in High Desert SALT LAKE CITY — Corvette Racing's final warm - up for the 24 Hours of Le Mans was run in near - record temperatures as a heat wave in Utah's high desert tested America's premier production sports car tHigh Desert SALT LAKE CITY — Corvette Racing's final warm - up for the 24 Hours of Le Mans was run in near - record temperatures as a heat wave in Utah's high desert tested America's premier production sports car thigh desert tested America's premier production sports car team.

The high temperature for that day was 88 °F, which is in range of the average high summer temperatures in the Salt Lake valley.

As Inle Lake is located in a relatively higher altitude, even during the peak of summer, the average temperature is around 30 °C while during the cooler months (December to February), temperatures can drop to 10 °C at night.

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The temperature reconstruction is then formed by combining the high - frequency (< 80 y) signal from tree rings with the low - frequency (> 80 y) signal from lake sediments and other such non-annually resolved proxies.

With an average temperature of eight degrees Fahrenheit, six times saltier water than seawater, and the highest nitrous oxide levels of any body of water on Earth, it's safe to call the Lake Vida research site a «challenging environment.»

Snowfall varies across the region, comprising less than 10 % of total precipitation in the south, to more than half in the north, with as much as two inches of water available in the snowpack at the beginning of spring melt in the northern reaches of the river basins.81 When this amount of snowmelt is combined with heavy rainfall, the resulting flooding can be widespread and catastrophic (see «Cedar Rapids: A Tale of Vulnerability and Response»).82 Historical observations indicate declines in the frequency of high magnitude snowfall years over much of the Midwest, 83 but an increase in lake effect snowfall.61 These divergent trends and their inverse relationships with air temperatures make overall projections of regional impacts of the associated snowmelt extremely difficult.

His position: • No evidence of increasing lake clarity as a result of secchi measurements since 1946 • The interplay of stratification and plankton productivity are not «straightforward» • Challenges O'Reilly's assumption on the correlation of wind and productivity - the highest production is on the end of the lake with the lowest winds • A strong caution using diatoms as the productivity proxy (it is one of two different lake modes) • No ability to link climate change to productivity changes • More productivity from river than allowed for in Nature Geopscience article • Externally derived nutrients control productivity for a quarter of the year • Strong indications of overfishing • No evidence of a climate and fishery production link • The current productivity of the lake is within the expected range • Doesn't challenge recent temp increase but cites temperature records do not show a temperature rise in the last century • Phytoplankton chlorophylla seems to have not materially changed from the 1970s to 1990s • Disputes O'Reilly's and Verbug's claims of increased warming and decreased productivity • Rejects Verburgs contention that changes in phytoplankton biomass (biovolume), in dissolved silica and in transparency support the idea of declining productivity.

The Great Lakes, North America's largest freshwater feature, have recently recorded higher water temperatures and less ice cover as a result of changes in regional climate (see also Ch.

Tierney had to use a different formula because some of the other lakes used in the study had very high Tex86 numbers and the traditional Tex86 formulae would have given lake surface temperatures that were much too high.

Higher temperatures and permafrost thaw could cause an increase of up to 50 per cent in emissions of a key greenhouse gas from northern lakes and ponds by 2100.

I had proven that the website operated by the Michigan State University had published ridiculously high surface water temperatures widely distributed over the lake many indicating super-boiling conditions.

Next day, the sun would raise the temperature higher and pump more vapor into the air from Lake Michigan, so the dew - point was higher and part of the added heat was retained.

Sources as varied as marine sediments, corals, tree rings, stalagmites, boreholes, the length of glacial tongues, ice cores, and lake sediments all independently confirm that modern global temperatures are anomalously high.

The high - pass variations in ring width lock in beautifully with temperature, better in fact than does Lake Johnston.

Of course, this theory is pretty bad as is because it doesn't explain why the slightly higher (say 50m) Lake Johnston site maintains its temperature response at all frequencies.

The retreat has been most noticeable at high elevations, driven in large part by warming temperatures contributing directly to melting and indirectly to more precipitation falling as rain rather than snow, in turn increasing the rate at which the glaciers move and increasing the size of glacial lakes, both decreasing ice cover.

Photo: GrapevineTxOnline.com / cc As Texas continues to suffer from the worst one - year drought on record along with scorchingly high temperatures, area lakes might seem like the best places to find refuge from the heat, but apparently not for fish.

From the Southwest to the Great Lakes, temperatures have been so high and rainfall so low that the drying effect of warmer air temperatures far exceeded what little precipitation there's been, resulting in moisture being drawn out of soils.