Remote sensing involves the collection of data about an object from a distance. Humans and many other types of animals accomplish this task with aid of eyes or by the sense of smell or hearing.
Earth scientists use the technique of remote sensing to monitor or measure phenomena or processes found in the Earth's lithosphere, biosphere, hydrosphere, and atmosphere.
Mechanical remote sensing devices have greatly improved the ability to receive and record information about an object without any physical contact. Often, these sensors are positioned away from the object of interest by using helicopters, planes, and satellites. These sensors may be either passive or active. Passive sensors detect energy when the naturally occurring energy is available such as sun energy. Active sensors provide their own energy source as radar waves and record its reflection on the target.
Research Suggests Wild Birds May
Play a Role in the Spread of Bird Flu
Wild migratory birds may indeed play a role in the spread of bird flu [influenza], also known as highly...
National Oceanic and Atmospheric Administration (NOAA), United StatesLast Updated on 2014-06-30 19:00:15
The National Oceanic and Atmospheric Administration (NOAA) is a federal agency within the United States Department of Commerce. As a science-based operational agency tasked with monitoring climate and changes in the environment, NOAA is responsible for the study of the atmosphere and the oceans. The agency issues daily weather forecasts and storm warnings, restores coastline, aids the flow of marine commerce, and manages fisheries. NOAA's activities facilitate weather- and climate-sensitive economic activity that account for roughly one-third of the country's gross domestic product (GDP). The agency also responds to natural and man-made maritime disasters, operates a complex network of oceanographic, meteorological and atmospheric data-collecting products and services, and manages marine mammals, marine endangered... More »
The North American MosaicLast Updated on 2013-10-24 15:12:08
An Overview of Key Environmental Issues
The North American Agreement on Environmental Cooperation obliges the Secretariat of the Commission for Environmental Cooperation to “periodically address the state of the environment in the territories of the Parties.” To meet this obligation, the Secretariat has developed this report—The North American Mosaic: An Overview of Key Environmental Issues—with the support of environmental reporting experts from the governments of Canada, Mexico and the United States.
This report describes a wide variety of environmental trends and conditions across North America. The breadth and diversity of the subject are astounding: from tiny invasive zebra mussels to global greenhouse gases measured by the teragram; from the last remaining vaquita porpoises to vast expanses of boreal forests and marine ecosystems; from invisible... More »
Improving access to and use of earth science dataLast Updated on 2013-10-22 23:34:26USGS Helps Debut New Technology to
Improve Access and Use of Earth Science Data
Researchers investigating global issues now have an easy method for finding and using earth science data through a new technology developed by the Data Observation Network for Earth, or DataONE.
Understanding broad and complex environmental issues, for example climate change, increasingly relies on the discovery and analysis of massive datasets. But the amount of collected data—from historical field notes to real-time satellite data—means that researchers are now faced with an onslaught of options to locate and integrate information relevant to the issue at hand.
DataONE, a ten-institution team with several hundred Investigators, including researchers from the United States Geological Survey (USGS), is addressing this data dilemma with a number of cyberinfrastructure and... More »
Africover InitiativeLast Updated on 2013-10-08 23:04:33
The Africover Project is designed to provide a digital, georeferenced database on land cover—and a geographic information reference point for the whole of Africa.
The purpose of the Africover Project is to establish a digital georeferenced database on land cover and a geographic referential for the whole of Africa including:
geodetical homogeneous referential
The Multipurpose Africover Database for the Environmental Resources (MADE) is produced at a 1:200,000 scale (1:100,000 for small countries and specific areas).
Reinforcing national and sub-regional capacities for the establishment, update and use of the geographic referential and land cover maps and spatial data bases is the core strategy of Africover: this has been the methodology adopted to ensure an operational approach and the sustainability of the initiative.
The renewable... More »
Microbial life in undersea volcanoesLast Updated on 2013-07-11 11:30:13Many of the lifeforms inhabiting the Earth live in sediments and rocks. The research reported here provides the first detailed data on methane-exhaling microbes that live deep in the cracks of hot undersea volcanoes.
Scientists Define New Limits of
Microbial Life in Undersea Volcanoes
A third of Earth's organisms live in rocks and sediments, but their lives have been a mystery
By some estimates, a third of Earth's organisms live in our planet's rocks and sediments, yet their lives are almost a complete mystery. This week, the work of microbiologist James Holden of the University of Massachusetts-Amherst and colleagues shines a light into this dark world. In the journal Proceedings of the National Academy of Sciences (PNAS), they report the first detailed data on methane-exhaling microbes that live deep in the cracks of hot undersea volcanoes.
"Evidence has... More »
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