Plant Productivity Reduction with Climate Change
NASA: Drought Drives Decade-Long Decline in Plant Growth
Source: Earth has done an ecological about-face: Global plant productivity that once flourished under warming temperatures and a lengthened growing season is now on the decline, struck by the stress of drought. NASA-funded researchers Maosheng Zhao and Steven Running, of the University of Montana in Missoula, discovered the global shift during an analysis of NASA satellite data. Compared with a six-percent increase spanning two earlier decades, the recent ten-year decline is slight — just one percent. The shift, however, could impact food security, biofuels, and the global carbon cycle.
A snapshot of Earth’s plant productivity in 2003 shows regions of increased productivity (green) and decreased productivity (red). Tracking productivity between 2000 and 2009, researchers found a global net decrease due to regional drought. Credit: NASA Goddard Space Flight Center Scientific Visualization Studio
“We see this as a bit of a surprise, and potentially significant on a policy level because previous interpretations suggested that global warming might actually help plant growth around the world,” Running said.
“These results are extraordinarily significant because they show that the global net effect of climatic warming on the productivity of terrestrial vegetation need not be positive — as was documented for the 1980’s and 1990’s,” said Diane Wickland, of NASA Headquarters and manager of NASA’s Terrestrial Ecology research program.
Conventional wisdom based on previous research held that land plant productivity was on the rise. A 2003 paper in Science led by then University of Montana scientist Ramakrishna Nemani (now at NASA Ames Research Center, Moffett Field, Calif.) showed that global terrestrial plant productivity increased as much as six percent between 1982 and 1999. That’s because for nearly two decades, temperature, solar radiation and water availability — influenced by climate change — were favorable for growth.
Interannual shifts in plant productivity (green line) fluctuated in step with shifts in atmospheric carbon dioxide (red line) between 2000 through 2009. Credit: Maosheng Zhao and Steven Running
Setting out to update that analysis, Zhao and Running expected to see similar results as global average temperatures have continued to climb. Instead, they found that the impact of regional drought overwhelmed the positive influence of a longer growing season, driving down global plant productivity between 2000 and 2009. The team published their findings Aug. 20 in Science.
“This is a pretty serious warning that warmer temperatures are not going to endlessly improve plant growth,” Running said.
The discovery comes from an analysis of plant productivity data from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, combined with growing season climate variables including temperature, solar radiation and water. The plant and climate data are factored into an algorithm that describes constraints on plant growth at different geographical locations.
For example, growth is generally limited in high latitudes by temperature and in deserts by water. But regional limitations can very in their degree of impact on growth throughout the growing season.
Zhao and Running’s analysis showed that since 2000, high-latitude northern hemisphere ecosystems have continued to benefit from warmer temperatures and a longer growing season. But that effect was offset by warming-associated drought that limited growth in the southern hemisphere, resulting in a net global loss of land productivity.
“This past decade’s net decline in terrestrial productivity illustrates that a complex interplay between temperature, rainfall, cloudiness, and carbon dioxide, probably in combination with other factors such as nutrients and land management, will determine future patterns and trends in productivity,” Wickland said.
Related CO2 is plant food
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spare me your ignorant and paranoid nonsense. go watch some Alex Jones
video and STFU.
Well you stick to your FLAT-EARTHER group.
i never have nor will i ever promote a communist world.
didn’t you say you will not reply anymore to me? pls Keep that promise.
Rothschilds own most of the World fool. Said to be 1/3. Heard of the
Georgia Guidestones? 500million pop plan. Ever research Eugenics? David
Attenborough, David Suzuki, Bill Gates, etc are famous Eugenicists. Heard
of Tikkun Olam, the Zionist plan to depopulate to 15K slaves per Jew, a
World in Balance. You seriously have no footing to talk as you put up a
wall on history, religion, politics, and elementary-science.
It’s not science, it’s Fraternity-Science.
LOL moron, Australia just had one of ist warmest summer…. we are already
in an ice Age moron. on a global scale, the LIA was almost not detectable.
you are insane. totally insane. lucky most People laugha t Clowns like you
and don’t take your nonsense serious. seek help.
i even drank water with Fluor in it…… so you think the Rothschilds are
leaders of the world? i have seen nothing that would even indicate
depopulation etc. actually the contrary is the case, what is promoted is
green growth. only with growth we can solve the AGW Problem. well atleast
according to the IPCC: you are clearly nuts and lack scepticism when it
Comes to CT’s you found on the Internet.
You’re too common to understand. You put up walls and parrot the
propaganda. Cattle for the slaughter.
I will no be replying to you any more. Good luck surviving in the communist
world you are promoting.
You are defying Elementary Science that says: * Carbon is a plant food. *
Sea water evaporates with heat, therefore creating more moisture and rain *
That Vivariums/Greenhouses plateau heat not keep increasing as the heat
produces balancing factors. You call me paranoid, but maybe you should look
int he mirror and ask yourself are you indoctrinated and domesticated, or
simply are you a Communist Zionist type.
i have read propably all of the CT’s out there. i like CT’s they are like
Fantasy novels. just based on real names and places etc. but nontheless
Fantasy.
Then you fall into the Indoctrinated/Domesticated option I left you. In
Australia the weather has been fairly cold the last few decades. I hope it
returns to proper summers, but it seems the World is heading into a mini
ice age. Ice ages are nothing new, though, like droughts and hot summers.
The World is a diverse place. If humans can stop anything is Chem-Trails,
Cloud Seeding, and GMO’s.
Global Warming Agenda is the promotion of Communism, Carbon-Communism.
People in a Carbon-Communist Regime will be restricted based on carbon
interaction. All controlled at a global level, removing free will. The
people designing the CARBON AGENDA don’t want you off the grid. They wont
you dead or a slave. It’s as simple as that.
Plant love carbon emissions. Liars. Global-Warming is merely a political
Agenda, a scam.
And you’re ignorance is seriously childish. So you think the likes of
Rothschilds are Athiests. So you think there is no Eugenics/Depopulation
movement behind Global-Warming Agenda. You are clearly wrong. A teen or
child at mind with heavy indoctrination. How many Vaccines have you had…
you seriously Need help, your Paranoia is extreme.
how does Eugenics and depopulation fit together? it contradicts
eachother…… and your antisemitic conspiracy theories are disgusting i
really hope you do not respond anymore.
No FLAT EARHERS are those that use peer pressure to lock people down to a
claim, as is Climate-Change/Global-Warming. I agree the Greeks and Bible
People already knew the Earth was round. But the Roman Order, the
Dark-Religion and their Science Seers locked people into thinking it was
flat. The same Zionist Order works to push Global-Warming as fact and the
minions sprout the tripe irrespective of observable facts there is no
general warming or fear needed.
lol yeah more anti Science, with your Anti GMO nonsense. Chemtrails? more
paranoid nonsense.
If you think the current Leaders of the World are Atheists, you are sorely
mistaken. Atheism is taught to the CATTLE PEOPLE who will later be
slaughtered.
be your own scientist? well good luck trying to figure out the cliamte
System moron.
ok i take that as a clear no, you have no science to over….. go watch
some David Icke Videos or some “docus” about chemtrails. go get your bias
confirmed by CT Videos.
You remind me of the FLAT-EARTHERS. Anyone that contested flat-earth theory
where heretics. The fact is Fraternity-Science employs people who sprout
words for money and for political and dark-religious agendas. They have to
pay their homes off and then consider the PEER PRESSURE FACTOR and those
with left-brain type thinking. Probably had their frontal lobes burnt out
with weaponised vaccines.