World’s top climate scientists expect global heating to blast past 1.5C target

[LWeber]

[url]https://www.mdpi.com/2073-4395/9/5/243[/url]


Effects of Elevated CO₂ on Wheat Yield: Non-Linear Response and Relation to Site
Productivity


5. Conclusions

In summary, from this updated research synthesis on CO₂ impacts on wheat crop yield, we conclude that grain yield stimulation does not respond linearly to increasing CO₂ but is likely to reach a maximum and level off already at ~600 ppm. Based on 92 observations in field experiments, yield is estimated to increase by 25% on average under CO₂ enrichment. This level of average response is independent of experimental facilities and geographic location. We attributed the CO₂-induced grain yield stimulation to an increase in total aboveground biomass and a larger number of grains, whereas harvest index and specific grain mass remain unaffected and grain mass only increases to a very small extent. Grain yield response also shows a strong link to site productivity, where relative response is larger in low productive system?

[AlbertaFarmer5]

So we should aim for 600 ppm, then ration our CO2 production to maintain that level for as long as possible.

[blackpowder]

Ah yes, the Guardian. Some random numbers with a lot of speculation.
I "think", I "feel", I'm "scared".
Where have all the good English profs gone? Orson Wells would shred these guys.

[AlbertaFarmer5]

The words blast past definitely sound credible and scientific.

[jazz]

sea levels are rising, like 1mm per 100yrs.

[chuckChuck]

A photo of one beach with sea levels that go up and down because of tides. Wow!

And you think this is evidence that sea levels aren't rising?

Its not like the climate change deniers might have cherry picked photos that showed no difference? Naw they wouldn't do that!

Instead of actual satellite and scientific equipment and processes to measure relatively small changes in sea level over time, the really dumb people think you just have look at photos and eyeball it?

And you can do that for all the thousands upon thousands of miles of coast line all around the world! Quite the feat for a farmer who lives in the middle of the Prairies!

Give up!

[chuckChuck]

CO2's benefits to wheat and plant growth can easily be negated by hotter and drier summers. Our biggest yield limiting factor on the southern prairies is moisture not CO2 levels.

Canola does not like hotter and drier summers and will decrease in yield as the climate becomes hotter and drier.

How were the canola and wheat yields in the drought years in southern Alberta? Did more CO2 make them better?

Show us the photos like some dumb guy did!

[AlbertaFarmer5]

CO2's benefits to wheat and plant growth can easily be negated by hotter and drier summers.

I think you have that backwards. It is well documented that hotter and dryer Summers can be negated by higher levels of CO2 which increase the drought tolerance of any non c4 plant such as wheat.
But as you know well because we have been through this multiple times before, summers are not getting drier, they are getting wetter. And droughts are becoming less frequent and less severe.

[chuckChuck]

Sure A5! We are not going to take your made up armchair opinions as fact!

The last 5 years there has been a serious precipitation deficit in many areas of the prairies along with record forest fires and heat.

And drought still severely reduces plant growth and yield even with more CO2.

[AlbertaFarmer5]

Sure A5! We are not going to take your made up armchair opinions as fact!

The last 5 years there has been a serious precipitation deficit in many areas of the prairies along with record forest fires and heat.

And drought still severely reduces plant growth and yield even with more CO2.

Aren't you the same poster who keeps lecturing us that climate is long-term trend measured over 30 years? Now you are telling us that 5 years is proof of climate change? So what about the big rains in Southern Alberta the past few days? Is that weather or climate change?

[AlbertaFarmer5]

So which of these facts I presented do you consider armchair opinions?
The fact that precipitation is increasing? The fact that droughts are becoming less frequent and less severe? Or the fact that yields are increasing as CO2 increases?

I could add some more facts if you want, forest fires are nowhere near their record from a century ago, they have been declining ever since. Heat and drought are nowhere near their record from nearly a century ago.

[chuckChuck]

Good job A5 you are starting to understand climate vs weather! 30 years equals climate.

And that still doesn't change the remarkable last 5 years on the prairies that have been getting drier which contradicts your arm chair opinion that we are getting wetter.

[TSIPP]

sea levels are rising, like 1mm per 100yrs.

You can see where the tides and waves stop, that’s where the green starts, I guess it doesn’t fit chuckroach’s propaganda.

[chuckChuck]

[url]https://science.nasa.gov/earth/climate-change/new-study-finds-sea-level-rise-accelerating/[/url]

New study finds sea level rise accelerating


"Global sea level rise is accelerating incrementally over time rather than increasing at a steady rate, as previously thought, according to a new study based on 25 years of NASA and European satellite data.

If the rate of ocean rise continues to change at this pace, sea level will rise 26 inches (65 centimeters) by 2100 — enough to cause significant problems for coastal cities, according to the new assessment by Nerem and colleagues from NASA's Goddard Space Flight Center in Greenbelt, Maryland; CU Boulder; the University of South Florida in Tampa; and Old Dominion University in Norfolk, Virginia. The team, driven to understand and better predict Earth's response to a warming world, published their work Feb. 12 in the journal Proceedings of the National Academy of Sciences."



?

[jazz]

Looks like the climate loons already trying to burn down Ft Mac for a second time.