Missoula, Mont. (UPI) Aug 20, 2010
Plant productivity around the world, once on the rise with warming temperatures and a longer growing season, is declining because of droughts, researchers say.
Researchers at the University of Montana analyzed NASA satellite data to discover the global turnaround of productivity, a NASA release said Friday.
Plant productivity is a measure the photosynthesis process green plants use to convert solar energy, carbon dioxide and water to sugar, oxygen and eventually plant tissue.
Researchers Maosheng Zhao and Steve Running said they expected to see similar results as global average temperatures continued to climb. Instead, they found the negative impact of regional drought overwhelmed the positive influence of a longer growing season, driving down global plant productivity between 2000 and 2009.
After a 6 percent increase in the 1980s and 1990s, plant productivity declined 1 percent in the last 10 years.
"We see this as a bit of a surprise, and potentially significant on a policy level because previous interpretations suggested global warming might actually help plant growth around the world," Running said. "This is a pretty serious warning that warmer temperatures are not going to endlessly improve plant growth."
Although the 1 percent decline is not large, it could affect food security, biofuels and the global carbon cycle, scientists say.
earlier related report
"President (Dmitry Medvedev) has ordered the lifting of the state of emergency in the Nizhny Novgorod and Moscow regions as well as Mordovia," the Kremlin said in a statement.
The situation in Nizhny Novgorod and Mordovia has caused major concern as fires had raged close to Russia's main nuclear research centre in the town of Sarov, which lies close to the administrative border of the two regions.
The state of emergency remains in the Ryazan region due to "a complicated situation related to peat bog fires," the statement said.
"The situation has practically normalised," President Dmitry Medvedev said on a visit to Armenia, in comments broadcast on state television.
Russia had introduced the state of emergency in seven regions and Medvedev last week lifted the state of emergency in Vladimir, Voronezh and Marii El regions.
The emergencies ministry said 288 fires covering an area of just over 9,000 hectares (22,200 acres) were still burning across Russia, down from 313 fires over an area of 11,200 hectares the day earlier.
At the peak of the crisis, some 200,000 hectares of land had been ablaze in forest and peat bog fires that killed over 50 people.
Russians in Moscow were meanwhile shivering from cold as temperatures in the city plunged to 10 degrees Celsius (50 F) Friday morning, a stark contrast to the numbers edging almost 40 degrees recorded the week earlier.
"Temperatures will go up but not by much," Tatyana Pozdnyakova, chief specialist with the Moscow Weather Bureau, told AFP.
"There has been an inflow of the cold Arctic air, that is why the temperatures are so low."
Temperatures would increase to 14-15 degrees Celsius later in the day and will also fluctuate until the end of the month, Pozdnyakova added.
Share This Article With Planet Earth
Farming Today - Suppliers and Technology
Madison WI (SPX) Aug 19, 2010
Greenhouse gas markets, where invisible gases are traded, must seem like black boxes to most people. Farmers can make money on these markets, such as the Chicago Climate Exchange, by installing methane capture technologies in animal-based systems, no-till farming, establishing grasslands, and planting trees. Farmers, students, extension educators, offset aggregators, and other stakeholders ... read more
Google photographing French streets again, minus Wi-Fi scans|
Google doubles Germans' opt-out deadline for Street View
New Satellite Data Reveals True Decline Of World's Mangrove Forests
An Ocean Of Research Via Satellite
Life360 Launches Real-Time Family Tracking App For iPhone
Real-Time Polar Bear News Featured On New Churchill Polar Bears Website
Hunter's iJournal Provides iPhone Users A Way To Improve Their Hunting Skills
India Launches Satellite-Based Navigation System
Norway to pay 30 million dollars to save Indonesian forests
Satellites confirm world mangrove losses
US converts Brazilian debt into environmental protection
Global Tropical Forests Threatened By 2100
Indonesia palm oil giant defends record
Modified yeast can make more ethanol
Cellulosic Methanol Produced From First Commercial Cellulosic Biofuels Plant
Wide Range Of Plants Offer Cellulosic Biofuel Potential, Ecological Diversity
Carmanah Provides Solar LED Lighting For Bridge Lighting Project
Bring Solar Energy To University Of Delaware
Major Hurdle Cleared For Organic Solar Cells
REC Solar Announces Largest U.S. Carport Solar Installation
Mortenson Construction Building 100 Turbine Wind Farm In Illinois
Canada looks to utilize wind energy
LADWP Approves New Wind Project
German wind growth down, exports strong
Trapped miners in Chile are alive after 17 days
21 dead, 12 trapped in China mine accidents
Chinese rescuers battle to save 24 trapped in mine
Philippines police detain 80 Chinese miners
China's Wen calls for political reform: state media
Book critical of China's premier on sale in Hong Kong
China dissident's PM book set for release amid jail threat
Hong Kong people rally to save Cantonese language
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|