Tuesday, March 5, 2013

re. Global warming affects crop yields, but it's the water not the heat


Wow!
Out Just today March 4, 2013 an eye opening study titled Global warming affects crop yields, but it's the water not the heat strengthens tremendously the arguments against Climate Geoengineering by ways of Solar Radiation Management (SRM). (SRM induces droughts)

Update:
On the following statement below: I think that I need to make a clarification. I think there is a difference between the need for studies (which could shed light on the effects of ongoing anthropogenic sulfur emissions) versus the active promotion for the implementation of such technologies as SRM. OE (Aug. 11 2014) 

Not that it will matter... as there have been many previous studies that factually, ethically and in scientific terms argue against this type of reckless Geoengineering; this behavior begs the question: Are some of the powerful people promoting these types of schemes cut from the same cloth as those who for a long time denied, disregarded and distorted the facts about climate change?

Any ways…

Global warming affects crop yields, but it's the water not the heat
David B. Lobell, Graeme L. Hammer, Greg McLean, Carlos Messina, Michael J. Roberts & Wolfram Schlenker

http://phys.org/news/2013-03-global-affects-crop-yields.html



Here some more …

Drought-Induced Reduction in Global Terrestrial Net Primary Production from 2000 Through 2009
Maosheng Zhao*, Steven W. Running

http://www.sciencemag.org/content/329/5994/940.short

Do volcanic eruptions enhance or diminish net primary production?
Evidence from tree rings
Nir Y. Krakauer and James T. Randerson1

http://www.atmos.berkeley.edu/~niryk/GBC_2003.pdf

Toward ethical norms and institutions for climate engineering research David R Morrow et al (2009)

And this from a scientist that is not avert to Geoengineering:

“ high level of SO2 is causing not only global warming but widespread extinction”
“The oxidizing capacity of the atmosphere is limited”
Sulfur dioxide initiates global climate change in four ways
Peter L. Ward

http://tetontectonics.org/Climate/SO2InitiatesClimateChange.pdf

As temps rise, plant growth overwhelmed by longer, more frequent droughts. A video: 




 Scientists warn geoengineering may disrupt rainfall
 By Chris Wickham - Reuters 6/2012
http://www.reuters.com/article/2012/06/06/us-geoengineering-research-idUSBRE8550P020120606


Heavy weather: why we need supercomputers to teach us how clouds and climate change work
http://www.theverge.com/2013/3/25/4129026/clouds-are-hiding-the-the-truth-of-how-much-earths-climate-will-change

Pollution in Northern Hemisphere helped cause 1980s African drought By Hannah Hickey June  6, 2013
http://www.washington.edu/news/2013/06/06/pollution-in-northern-hemisphere-helped-cause-1980s-african-drought/

Evaporative demand and water requirements of the principal crops of the Guadalentín valley (SE Spain) in drought periods

The critical role of extreme heat for maize production in the United States   

David B. Lobell ea al.

http://www.nature.com/nclimate/journal/v3/n5/full/nclimate1832.html


Updates:

08/11/2014

Plants have unexpected response to climate change
By Jennifer Balmer – Science Mag-  8 August 2014

03/20/13

NASA video:

Global Warming Reduces Plant Productivity




Climate change's longer growing season won't mean more carbon capture
Feb 25, 2014 by Stephen Chaplin


“"One would expect that having green leaves for a longer period of time would lead to more photosynthesis and, as a result, more carbon available for wood growth every year," said Edward Brzostek, a postdoctoral fellow in the IU College of Arts and Sciences' Department of Biology and first author on one of the papers. "What we find is the exact opposite: Tree growth is declining due to growth ending earlier and earlier each year because the site has been getting drier and drier each year."”


January 18 2014
Chronic water stress reduces tree growth and the carbon sink of deciduous hardwood forests
Edward R. Brzostek et al. DOI: 10.1111/gcb.12528
http://onlinelibrary.wiley.com/doi/10.1111/gcb.12528/abstract


January 17, 2014

CS3C Sitrep: California a Climate Ecological Disaster Zone
Sitrep Summary
On 17 January 2014, California Governor Jerry Brown finally declared a drought emergency in the US state of California
https://docs.google.com/document/d/17z6OaMtzo5yIYUqckfoKDHlFXMlIw6e2QOZatqbooK4/pub

Extreme Weather: The 2012-2013 U.S. Drought
Current U.S. Drought Is Most Severe in Decades
(Released Jan. 9, 2014)


Much of the U.S. West is suffering through a drought of historic proportions. The National Oceanic and Atmospheric Administration’s weekly drought monitor reported that as of July 30, more than 40 percent of the continental U.S. was in a moderate or worse drought, and more than 30 percent was in a severe or worse drought. These numbers are improved compared with earlier in 2013 and 2012, as flooding rains have drenched the Northern Plains and Midwest. Meanwhile, drought has continued to expand in the Southwest, where dry conditions have fueled devastating wildfires.
More...


Impact of geoengineering on rainfall could be greater than we thought

January 9, 2014 by Angus Ferraro



 Weakened tropical circulation and reduced precipitation in response to geoengineering Angus J Ferraro, Eleanor J Highwood and Andrew J Charlton-Perez
doi:10.1088/1748-9326/9/1/014001
Department of Meteorology, University of Reading, Reading, UK

Climate fixes 'pose drought risk'By Judith Burns
7 August 2009

The use of geo-engineering to slow global warming may increase the risk of drought, according to a paper in Science journal.
http://news.bbc.co.uk/2/hi/science/nature/8188409.stm








December 5, 2013

Geoengineering Approaches to Reduce Climate Change Unlikely to Succeed

Dec. 5, 2013 — Reducing the amount of sunlight reaching the planet's surface by geoengineering may not undo climate change after all. Two German researchers used a simple energy balance analysis to explain how Earth's water cycle responds differently to heating by sunlight than it does to warming due to a stronger atmospheric greenhouse effect. Further, they show that this difference implies that reflecting sunlight to reduce temperatures may have unwanted effects on Earth's rainfall patterns.


October 25, 2013

Sunshade Geoengineering More Likely to Improve Global Food Security, Research Suggests
http://www.sciencedaily.com/releases/2012/01/120122152615.htm


Fact or Fiction?: We Can Push the Planet into a Runaway Greenhouse Apocalypse
A new study suggests human activity could, in theory, bring about the end of most life on Earth


Updated Nov. 22, 2013
Decrease in evaporation over the Indian monsoon region: implication on regional hydrological cycle (December 2013)
B. Padmakumari, A. K. Jaswal, B. N. Goswami


Related blog entry on this blog:

Short cutting the cooling properties of the hydrological cycle


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Para una corta introducción visite:
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