Earth’s lakes are warming, says NASA studyNovember 24th, 2010 - 12:17 pm ICT by ANI
Washington, Nov 24 (ANI): Earth’s largest lakes have warmed during the past 25 years in response to climate change, say NASA scientists.
Philipp Schneider and Simon Hook of NASA’s Jet Propulsion Laboratory in Pasadena, Calif., used satellite data to measure the surface temperatures of 167 large lakes worldwide.
They reported an average warming rate of 0.81 degrees Fahrenheit per decade, with some lakes warming as much as 1.8 degrees Fahrenheit per decade.
“Our analysis provides a new, independent data source for assessing the impact of climate change over land around the world,” said Schneider, lead author of the study.
Small changes in water temperature can result in algal blooms that can make a lake toxic to fish or result in the introduction of non-native species that change the lake’s natural ecosystem.
The NASA researchers used thermal infrared imagery from National Oceanic and Atmospheric Administration and European Space Agency satellites. They focused on summer temperatures (July-September in the Northern Hemisphere and January-March in the Southern Hemisphere) because of the difficulty in collecting data in seasons when lakes are ice-covered and/or often hidden by clouds. Only nighttime data were used in the study.
The largest and most consistent area of warming was northern Europe. The warming trend was slightly weaker in southeastern Europe, around the Black and Caspian seas and Kazakhstan. The trends increased slightly farther east in Siberia, Mongolia and northern China.
In North America, trends were slightly higher in the southwest United States than in the Great Lakes region. Warming was weaker in the tropics and in the mid-latitudes of the Southern Hemisphere.
The findings were published in the journal Geophysical Research Letters. (ANI)
- 2010 tied for warmest year on record - Jan 13, 2011
- Arctic subjected to intense warm climate intervals - Jun 22, 2012
- Global warming likely to intensify tropical rainfall - Sep 18, 2012
- Titan lake-levels change due to Earth-like seasonal evaporation - Jul 16, 2010
- Here's how the Arctic will look by the end of this century - Mar 04, 2011
- Antarctica warming a regional trend, not local - Nov 06, 2009
- How giant tortoises, alligators thrived in High Arctic 50m years ago - Aug 25, 2010
- Shrinking snow and ice cover 'making global warming worse' - Jan 19, 2011
- Ocean temperature patterns key to climate change - Aug 26, 2012
- Arctic sea ice level reaches second-lowest in history - Oct 06, 2011
- Global temperatures 'on the increase' - Mar 22, 2011
- West Antarctic ice sheet would collapse by year 3000: Study - Jan 10, 2011
- 2010 warmest year on record: UN weather agency - Jan 21, 2011
- Human-induced global warming requires long-term study - Nov 20, 2011
- Global warming cuts available wind energy: Study - Nov 10, 2010
Tags: algal blooms, caspian seas, european space agency, geophysical research letters, infrared imagery, jet propulsion laboratory, journal geophysical research, mid latitudes, nasa researchers, nasa scientists, nasa study, national oceanic and atmospheric administration, natural ecosystem, nighttime data, northern china, northern hemisphere, simon hook, southern hemisphere, summer temperatures, surface temperatures