you are HAMMER to say that, leave the IRON!Go get ANVIL.
Okay that's all I found while it's HOT
you are HAMMER to say that, leave the IRON!Go get ANVIL.
Christophe wrote:Anything ... never seen a dam upstream of a glacier !!
Well speaking of runoff, Belgium again affected by violent storms:
ABC2019 wrote:So when it's hot and dry, it's RC, but when it's cool and rainy, it's RC too?
Christophe wrote:ABC2019 wrote:So when it's hot and dry, it's RC, but when it's cool and rainy, it's RC too?
Don't you want to stop being a jerk?
The IPCC has said, for thirty years, that extreme events will become more intense, longer and more frequent due to climate change. Scientists had warned that the effects would start to be really noticeable around the world from 2010-2020. We are on the planned trajectories. Climate change is now, and not in 2040 or 2050. We know that we will beat heat records more and more easily, that torrential rains and droughts will increase. The next IPCC report also devotes a chapter to extreme climatic events: heat waves, cold spells, droughts, fires, etc.
Are recent events really linked to climate change?
There have always been heat waves, torrential rains, but the fact that they are increasing and now hitting the whole planet is the indisputable sign of climate change. The current climate is no longer what our parents, grandparents and great-grandparents experienced. We have entered uncharted territory. Regarding heat domes, at temperate latitudes, we must imagine the atmospheric circulation as a high-altitude river circling the planet. It forms, in places, meanders which become blocked, causing atmospheric vortices of several thousand kilometers. The heat dome, that's it: a great meander with air trapped inside, without wind. The air is getting warmer by the day. We already had this phenomenon in France, during the deadly heatwave of 2003. Without creating them, climate change greatly amplifies the effect of these domes.
There are many breaking points in the climate system, times when you switch to another state
Are we on track to limit global warming to less than 2 ° C, the target set by the Paris Agreement?
The temperature has already risen by 1,1 ° C compared to the pre-industrial era. The goal is to reduce greenhouse gas emissions and achieve carbon neutrality by 2050-2060 to stabilize warming at 1,5 ° C. But in the meantime, the latter will continue. Today, we are not on a stabilization trajectory at 1,5 ° C, but rather at 3 ° C, or even 3,5 ° C at the end of the century. The threshold of + 1,5 ° C will most likely be crossed at the start of the 2030s and, if we continue at the current rate, that of 2 ° C between 2040 and 2060. The risk of heatwaves will increase very significantly: with + 1,1 ° C, the probability of facing a heat wave like the one in June 2019 in France each summer with 46 ° C in the South is around 1 in 50; at + 1,5 ° C, it will go to 1 in 10; and at + 2 ° C, at 1 in 4. On the other hand, an increase of 1 ° C increases the quantity of water vapor contained in the atmosphere by 7%, so we will have even more intense torrential precipitation. . The climate that our children and grandchildren will experience will be very different from ours. It is a journey of no return.
Are we close to the breaking point?
There are several tipping points in the climate system, times when you switch to another state. Among them, the irreversible melting of the ice caps, which would cause a rapid rise in sea level. A change in certain ocean currents, which would have repercussions on the monsoons. Or the disappearance of the Amazon rainforest. But scientists do not know at what temperature level these phenomena can occur, or when. The only certainty: the risk of tipping increases considerably with warming: it is not linear!
Read also - Climate: melting ice, coral reefs ... why we must be interested in tipping points
Can we really fight against climate change?
Yes, we can still limit the breakage. There is only one solution: carbon neutrality. It takes only one molecule of CO2 to accumulate in the atmosphere. Imagine a bathtub, with a faucet and a siphon. Currently, the tap - our human activities - discharges more greenhouse gases than the ocean and vegetation, these siphons or natural wells, can pump. If we stop emitting greenhouse gases today, around 40% of the CO2 emitted since the start of the industrial era will still be present in a hundred years, and 20% in a thousand years.
The question is to know up to what level our societies are able to adapt before a global destabilization
States have made commitments ...
To limit warming to 2 ° C, it would be necessary to achieve carbon neutrality by 2060-2070. And for 1,5 ° C, in 2050-2060. In France, these objectives are the framework of the climate and resilience law which has just been adopted and which is based on the national low carbon strategy. Unfortunately, we do not respect them. According to the High Council for the Climate, the decrease in greenhouse gas emissions is twice too slow. In general, most countries, including France, appear to be dunces in the fight against climate change.
Do citizens have the means to reverse the situation?
Individual actions are not enough. If we all became virtuous, it would reduce our greenhouse gas emissions by around a quarter, at best by a third, in relation to carbon neutrality commitments. We need radical transformations. Civil society must take even more of the IPCC reports to push governments to review modes of production, transport, consumption ... For four or five years, awareness seems to be growing.
Would humanity survive a 3 ° C warming?
The question is to know up to what level our societies are able to adapt before a global destabilization. Regarding ecosystems, irreversibility is already underway: at 1,5 ° C warming, more than 70% of corals in the western Pacific will have disappeared, at 2 ° C more than 99%. This is what must be remembered: every fraction of a degree counts. A world at + 1,6 ° C is not the same as a world at + 1,7 ° C. If we continue our momentum, the current disasters are just a foretaste of what lies ahead. https://www.lejdd.fr/Societe/le-climato ... ur-4060331
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