Sentences with phrase «change on crop yields»

Vinny: «They were trying to split out the effects of climate change on crop yields — a worthwhile exercise, no?»

They were trying to split out the effects of climate change on crop yields — a worthwhile exercise, no?

Negative impacts of climate change on crop yields have been more common than positive impacts (some positive trends are evident in some high latitude regions).

Temperature trends are therefore important for determining both past and future impacts of climate change on crop yields at sub-continental to global scales.

In fact the Summary says that negative impacts of climate change on crop yields have been more common than positive impacts, with wheat and maize yields negatively affected in many regions and effects on rice and soybean yields smaller in major production regions.

But it's a funny kind of world in which it is known that «negative impacts of climate change on crop yields have been more common than positive impacts», and yet yields per acre and in total have increased.

Overall, the report said, «Negative impacts of climate change on crop yields have been more common than positive impacts.»

Based on many studies covering a wide range of regions and crops, negative impacts of climate change on crop yields have been more common than positive impacts (high confidence)... Since AR4, several periods of rapid food and cereal price increases following climate extremes in key producing regions indicate a sensitivity of current markets to climate extremes among other factors (medium confidence).

«Most modeling studies that look at the impact of climate change on crop yield and the fate of agriculture don't take into account whether the water available for irrigation will change,» Monier says.

Not exact matches

«Higher temperatures and changes in precipitation result in pressure on yields from important crops in much of the world,» says IFPRI agricultural economist Gerald Nelson, an author of the report, «Climate Change, Agriculture, and Food Security: Impacts and Costs of Adaptation to 2050».

The researchers also cautioned that the impacts of a changing climate on crop yields remain uncertain.

Improved agricultural water management could halve the global food gap by 2050 and buffer some of the harmful climate change effects on crop yields.

Based on historical patterns of emigration, crop yield and climate change between 1995 and 2005, the researchers project that as much as 10 percent of Mexico's population could be forced to migrate in coming decades.

«The results clearly showed that modest amounts of climate change can have a big impact on yields of several crops in Europe,» said Stanford doctoral student Frances Moore, who conducted the research with David Lobell, an associate professor of environmental Earth system science.

Lloyd, S. J., R. S. Kovats, and Z. Chalabi, 2011: Climate change, crop yields, and undernutrition: Development of a model to quantify the impact of climate scenarios on child undernutrition.

We focus instead on one major insect pest --- wheat stem sawfly (Cephus cinctus Norton)-- on Montana's dominant crop, wheat, to illustrate the mechanisms and principles involved in assessing climate change effects on agricultural pests and their impacts on crop yield or quality.

While climate change in recent decades has been found to negatively affect crop yields in many regions, a new study led by Carnegie's Julia Pongratz is the first to examine the potential effect of geoengineering on food security.

Essentially, big agra has hybridized wheat heavily over the last 5 decades to improve things such as crop yield and baking characteristics, but never once thought about the impacts on human health of changing the biochemical structure of wheat.

Just like on console and PC, the selling price of the different crops regularly changes, but because you don't have to wait very long between harvests, you can sell your yield, buy a tractor, and make most of that money back in under an hour.

Climate change effects on agriculture will have consequences for food security both in the U.S. and globally, not only through changes in crop yields, but also changes in the ways climate affects food processing, storage, transportation, and retailing.

In fact, the I.P.C.C. WGII report, in the chapter on North America says «Research since the [last IPCC report] supports the conclusion that moderate climate change will likely increase yields on North American rain fed agriculture... Most studies project likely climate - related yield increases of 5 - 20 % over the first decades of the century... Major challenges are projected for crops that are near the warm end of their suitable range or depend on highly utilized water resources.»

A new study in the Proceedings of the National Academy of Sciences examining the effects on immigration of decreased crop yields due to climate change finds that by 2080 millions of Mexican farmers could be forced to

On the pro side, supporters claim that changes to the genetic structure of a plant can help it resist weed killers, avoid pests, and yield more crops, but the anti-GMOers remind us that the long - term effects of these foods just aren't clear.

Agricultural Impacts Crop yield may decrease if climate changes As droughts increase, the demand for irrigation water increases putting more stress on already depleted aquifers.

Lobell, D. B. and M. B. Burke, 2010: On the use of statistical models to predict crop yield responses to climate change.

A recent meta - analysis published in the journal Nature Climate Change, by Challinor et al. (2014) examines 1,722 crop model simulations, run using global climate model output under several emissions scenarios, to evaluate the potential effects of climate change and adaptation on crop Change, by Challinor et al. (2014) examines 1,722 crop model simulations, run using global climate model output under several emissions scenarios, to evaluate the potential effects of climate change and adaptation on crop change and adaptation on crop yield.

Higher temperatures will have an impact on yields while changes in rainfall could affect both crop quality and quantity.»

Lloyd, S. J., R. S. Kovats, and Z. Chalabi, 2011: Climate change, crop yields, and undernutrition: Development of a model to quantify the impact of climate scenarios on child undernutrition.

Many crop yields are predicted to decline due to the combined effects of changes in rainfall, severe weather events, and increasing competition from weeds and pests on crop plants (Ch.

The additional processes included in the JULES model will provide a more complete picture of water resources of South Asia than previously possible, allowing quantitative analysis of the effects of changes in river flow and glaciers on water resources and the implications of these changes on water availability for irrigation and therefore crop yields.

It is important to understand the relationship between climate change, earlier growing seasons and pollination to ensure food on the table and profitable crop yields.

These tools provide the means to sharpen assessment and management capacities required to: compare the result of several water allocations plans; improve soil - moisture control - practices under rainfed conditions; optimize irrigation scheduling; sustainably intensify crop production; close the yield and water - productivity gaps; quantify the impact of climate variability and change on cropping systems; enhance strategies for increased water productivity and water savings; minimize the negative impact on the environment caused by agriculture.

This analytical report provides an overview of what climate change will mean to subsistence and smallholder farmers in Lesotho, and how the capacity for climate change adaptation in agriculture can be strengthened, focusing on selected areas of crops, livestock and forest - based livelihood systems, to stabilize and improve yields.

In order to generate such enormous losses (of 50 % to 70 % of crop yields), the study not only has to focus on a very unlikely climate outcome, but also has to assume that farmers stupidly ignore the changing conditions for the next 85 years.

Posted in Agriculture, Biodiversity, Carbon, Development and Climate Change, Disasters and Climate Change, Environment, Food, Information and Communication, Land, Learning, Lessons, Livelihood, News, Population, Research, Vulnerability, Water Comments Off on Crop Yields Stall In China, India

Comment (2 - 13): The Southeastern Legal Foundation provides the following reaction to the African rain - fed agriculture projection, which appeared in the Sunday Times (Leake, 2010a) and comes from former IPCC chair Robert Watson: «Any such projection [pertaining to African crop yields] should be based on peer - reviewed literature from computer modeling of how agricultural yields would respond to climate change.

Comment (2 - 11): Referring to an analysis published by Ben Pile, co-editor of the blog climateresistance.org on the blog of Roger Pielke, Jr. (Pile, 2010), the Southeastern Legal Foundation states that the primary reference supporting the IPCC's statement on African crop yields «Vulnerability of North African Countries to Climatic Changes» (Agoumi, 2003) was from IISD, an advocacy group.

Moderate climate change in the coming decades is projected to increase overall yields by 5 - 20 % on agricultural lands that rely of rainfall, although major challenges are projected for crops that are near the warm end of their suitable range.

Response (2 - 11): The implication that the credibility of IPCC's statement on African crop yields is diminished because the IPCC's source (Agoumi, 2003) for the statement was published by an advocacy organization or an organization with a «declared political interest in climate change» is unsupported.

Satellite imaging highlights the growing need to change agricultural practices in South Asia as higher average temperatures cause the reduction of crop yields on the Indo - Gangetic plain.

On the whole, Betts noted, food security would be at risk around the world, not just due to changing crop yields but also because of extreme weather events.

As far as crops go, the problem is this: Changes to the hydrological cycle as a result of global warming may be neutral on a 100 - year timescale, as far as crop yields are concerned.

«We conclude that gradual temperature changes have had a measurable impact on crop yield trends.

Summary of estimated impacts of observed climate changes on yields over 1960 - 2013 for four major crops in temperate and tropical regions.

Among the economic costs climate change is expected to enact on the United States over the next 25 years are: $ 35 million in annual property losses from hurricanes and other coastal storms, $ 12 billion a year as a result of heat wave - driven demand for electricity, and tens of billions of dollars from the corn and wheat industry due to a 14 percent drop in crop yields.

This Science Brief covers two papers in the journals Nature Climate Change and Science, on how crop yield may be affected by climate change and adaptChange and Science, on how crop yield may be affected by climate change and adaptchange and adaptation.

Climate change, crop yields, and undernutrition: development of a model to quantify the impact of climate scenarios on child undernutrition.

say it has been predicted that «the average temperature in the semiarid northwest portion of China in 2050 will be 2.2 °C higher than it was in 2002,» and they report that based on the observed results of their study, this increase in temperature «will lead to a significant change in the growth stages and water use of winter wheat,» such that «crop yields at both high and low altitudes will likely increase,» by 2.6 % at low altitudes and 6.0 % at high altitudes... Even without the benefits of the aerial fertilization effect and the anti-transpiration effect of the ongoing rise in the air's CO2 content, the increase in temperature that is predicted by climate models for the year 2050, if it ever comes to pass, will likely lead to increases in winter wheat production in the northwestern part of China, not the decreases that climate alarmists routinely predict.»

But would you really have clicked on an article advising that scientists have just published an analysis indicating that «Climate change will reduce crop yields sooner than we thought»?

The team used high - resolution weather pattern, crop yield and hop quality data to gauge the impact of climate change on the Saaz crops between 1954 to 2006.