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Tag: "satellite" at biology news

Shrinking ponds signal warmer, dryer Alaska

...rom 1978-1982, and digital images from the Landsat satellite from 1999-2002, Riordan outlined each pond by hand. "With automated classification your accuracy goes down," Riordan said. Cloud shadows can look like water and Alaska rarely experiences a cloudless day, said Verbyla. The most difficult part of the...

Climate experts search for answers in the oceans

...e data measured independently by several different satellite systems into a set of products that represent the ...cean colour." In order to make the most of all satellite information available on ocean colour and sea-surface temperature, ESA is merging data from state-of...

Edge density key to controlling gypsy moth spread

...es ?"the Allee effect" ?and the existence of a few satellite seed colonies created by human transfer of the insects over long distances, explain the invasion pulses, the researchers explain today (Nov. 16) in Nature. The gypsy moth adult is flightless and usually only spreads a short distance beyond infestatio...

NASA study: Alaskan fires affected Houston air quality in 2004

...ve new NASA-funded study based on a combination of satellite data, computer models and weather balloon readings finds that smoke from Alaskan and Canadian forest fires as much as doubled ground-level ozone thousands of miles away in Houston during a two-day period in July 2004. The study, which will appear onl...

Disappearing nest egg: Researcher studying declining numbers of macaws

...opes to install collars on numerous macaws and use satellite technology to track their movements and learn more about them. "We have some macaws here in captivity on campus at the Schubot Exotic Bird Center, but we have much to learn about them in their native habitat," he says. "We know that they tend to ...

Dust to gust

...he Atlantic by dust. By combining various types of satellite data, Dr. Koren and colleagues from Israel, the United Kingdom, the United States, and Brazil have now for the first time managed to obtain quantitative information about the weight of this dust. Analyses of dust quantities were performed near the Bo...

Biotech cotton provides same yield with fewer pesticides

...Geographical Information Systems (GIS) and LANDSAT satellite imagery to map the fields and evaluate plant growth in the non-cultivated areas. Plant growth can affect the biodiversity of insects found in an area. The researchers found that, per pesticide application, Bt cotton produced 9 percent more cotton/a...

African wetland managers armed with new technology

...cretariat, has been addressing this issue by using satellite imagery to provide detailed wide-area views of ind...ction maps ?with historical Earth Observation (EO) satellite images being compared with current acquisitions to see what changes have occurred during the last te...

More than drought affecting wheat yields

...ivided into five regions. The Amarillo facility, a satellite lab to one at Kansas State University, is operated under the Experiment Station's plant pathology program, headed by Dr. Charlie Rush. Samples came by mail, through Texas Cooperative Extension agents or were dropped off by producers, Allen said. Th...

Harmful Algal Blooms monitored from space in Chile

...ed from the MERIS instrument onboard ESA's Envisat satellite and the MODIS instrument onboard NASA's Aqua satellite and in situ water monitoring to monitor the Southern Ocean off the coast of Chile. A hydrodynamic ...

A dichotomy in migration patterns found for sea turtles in east Atlantic

...w findings--obtained by newly-improved methods for satellite tracking of the adult turtles' geographical movements and diving patterns--show that the sexually mature adult population also includes oceanic animals and thereby reveal that adults in the eastern Atlantic occupy very different habitats and undertak...

How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles

...y and an international team describe how they used satellite tracking systems to follow the journeys of ten tur...nt years marine turtle researchers have been using satellite telemetry to track turtle migrations. Satellite transmitter tags are attached to the shell of the tu...

Creating a window on 'oceans in motion'

...ge open ocean animals with tags that report in via satellite whenever they surface. TOPP has to date tracked thousands of individual Pacific Ocean animals spanning 21 top predator species, including whales, tuna, elephant seals, seabirds, sea turtles and sharks. "Tiny microprocessors and sophisticated remote...

Iron critical to ocean productivity, carbon uptake

...t really is. As a result, past interpretations of satellite chlorophyll data may be inaccurate, the researcher...tany and Plant Pathology. Unfortunately, he added, satellite imagery could not readily distinguish that difference. "It's really a fascinating process," Behrenf...

Atmospheric ozone recovering in mid-latitudes, report shows

...ationship based on direct measurements by multiple satellite andground-based, ozone-monitoring systems. "We do...t the University of Colorado at Boulder, relied on satellite and ground-based ozone data used in 14 modeling studies done by researchers around the world. She an...

NASA study solves ocean plant mystery

...future modeling, analysis and predictions. While satellite data from NASA's Sea-viewing Wide Field-of-view Sensor played an important part in the study, the real cornerstone of the discovery was ship-based measurements of fluorescence. Fluorescence occurs when plants absorb sunlight and some of that energy...

Scientists find Antarctic ozone hole to recover later than expected

...els based on current amounts as captured from NASA satellite observations, NOAA ground-level observations, NCAR airplane-based observations, with anticipated future emissions, the time it takes for the transport of those emissions into the Antarctic stratosphere, and assessments of future weather patterns over...

Plants used to detect gas leaks, from outer space!

...ines. "Our study was about testing the ability of satellite remote systems to monitor gas leaks via the spectr...es when the plants are stressed", says Steven. "A satellite image of the stress responses in vegetation should identify gas leaks at least as well as a visual r...

Scientist warns of threat to last stronghold of endangered turtle

...efforts to safeguard them. After fitting them with satellite trackers the team are using the internet to follow their journeys, which are among the longest in the animal kingdom. Dr Brendan Godley, of the University of Exeter, said: "Pacific leatherbacks have been decimated by incidental capture at sea and o...

Report shows deforestation threatens Brazil's Pantanal

...SCO Biosphere Reserve. The CI scientists analyzed satellite images to compare the proportion of deforested areas with those that still have native vegetation. They concluded that agriculture, cattle grazing and coal mining are the major threats to the Paraguay River Basin, a significant hydrographical drainag...

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