Acoustic sensors, vertical profilers, and drifting buoys were dropped into the path of Isabel to find answers to discover how much rain she dropped, how the water temperature varied, how quickly the water moved and how fiercely the wind blew. (Office of Naval Research)

Emerging geochemical and biological evidence from Alaskan lake sediment suggests that slight variations in the sun's intensity have affected sub-polar climate and ecosystems in a predictable fashion during the last 12,000 years.

New research indicates that noticeable changes in the sub-polar climate and ecosystems appear to be linked to variations in the sun�s intensity during the past 12,000 years. (University of California-Berkeley)

Results returned from ESA�s Envisat environmental satellite show that, due a record-breaking hot summer, Mediterranean waters off Crete increased by about three degrees Celsius since the previous year. (European Space Agency)

According to new research, the atmospheric CO₂ level 1.4 billion years ago was at least ten to 200 times greater than today. (Virginia Tech)

Greenhouse gas has been playing a critical role in warming our planet for billions of years, according to a new study that looks at the photosynthetic cycle by which plants convert light energy and CO₂ into cellular tissue. (National Science Foundation)

While Hurricane Isabel has no choice but to turn westward into the mid Atlantic states as it moves up the eastern seaboard, the question remains where exactly will it turn and which states will feel her fury, according to a Penn State meteorologist. (Penn State)

A new technology is allowing professionals and ordinary citizens to coordinate outdoor activities around fire operations. (USDA Forest Service, Pacific Northwest Research Station)

The tropics are being recognized as an important element in the dynamic process of global climate change. A recent investigation sheds light on the role of the tropics in climate change at the end of the last ice age.

A new study has shown that microbes living under the tundra snow pack ramp up their populations in late winter, a finding with implications for changing estimates of carbon dioxide levels in Earth's atmosphere. (University of Colorado at Boulder)

The largest ice shelf in the Arctic has broken, and scientists who have studied it closely say it is evidence of ongoing and accelerated climate change in the north polar region. (American Geophysical Union)