I searched the web admittedly quickly and found no reference to weather changing asteroid hits do ented other than the Yucatán one.
Thats because it caused the extinction of large animals we have great interest in. Dinosaurs.
extinction events caused by large objects undoubtedly caused events killing microbes.
For 2 billion years only prokaryotic single celled microbes (bacteria) ruled the Earth. For 2 billion years large objects had to have hit the earth and killed massive number of species of bacteria only. There were no eukaryotic cells much less giant multicellular dinosaurs. (First Eukaryotic single cells show up 1.5 billion years ago). On the scale of life on earth Dinosaurs are also a blip. But we like them because they are so big and easy to detect.
The 65 million year event is one blip in a huge amount of time. The scale of the rule of only bacteria is immense.
It is also important to note that a huge extinction event might have reduced the anaerobic bacteria. We notice a giant uptick in the oxygen building up in the ocean and rocks and then finally overwhelming the atmosphere leaving mostly aerobic bacteria.
This is part of the reason why I find it difficult to believe anything with any sort of intelligence like ours could arise. I can see places where evolution got lucky and produced some actual cells, not just self replicating biomolecules. But those cells took 2 billion years to produce the first eukaryotic cells? Why? Thats a huge amount of time and must have taken a gigantic evolutionary step. There is just no doubt the poor bacteria (prokaryotic cells were bombarded endlessly in their 2 billion years all alone on Earth before the first single celled eukaryotic organisms show up. This to me is a huge factor in how difficult it is to make life like us. Nature could not even produce single celled eukaryotic cells for 2 billion years? Thats a ridiculously large period of time even on a universal scale imo.
Last edited by pgardn; 08-03-2023 at 09:22 PM.
"....The sheer amount of water vapor could be enough to temporarily affect Earth’s global average temperature...."
".....Volcanic eruptions rarely inject much water into the stratosphere. In the 18 years that NASA has been taking measurements, only two other eruptions – the 2008 Kasatochi event in Alaska and the 2015 Calbuco eruption in Chile – sent appreciable amounts of water vapor to such high al udes. But those were mere blips compared to the Tonga event, and the water vapor from both previous eruptions dissipated quickly....."
The dismissal that we can drastically change the atmosphere causing warming is flat out strange.
We stopped using CFCs and the Ozone depletion decreased dramatically. We have already altered and "fixed" our own atmosphere.
Why is this forgotten?
I never asserted elsewise. Read my posts and show where I did
Great, so we can agree volcanos don't really belong in this thread.
Au contrair
High Summer temps in ‘22 & ‘23 could be due to Tonga volcano
See original post.
I'm not really sure which way you were going in your original point. I think you finally cleared up the point you're trying to make.
I think.
So you don't know what the temps were twixt say 1776 & 1940?
You knew 2023 with El Nino was going to be a nasty year when 2022 made it into the top 5-6* hottest years ever recorded globally despite being a La Nina year.
* #5 per NOAA, #6 per NASA
That chart can't be right, it says 1940-2023 but all of those months are 2009 or later. Also, there was this one week in 1962 where it got really hot and stuff.
And one time in Texas where it got really cold recently
1. 59 days in 2009
2. 58 days in 2022
3. 57 days in 2011
4. 41 days in 2013
5. 39 days and counting in 2023 as of August 4th
6. 36 days in 2020
6. 36 days in 1998
8. 33 days in 1948
This is quite interesting view on how environment can be affected.
So your could is more than likely. What is your could probability. I mean you could have ghosts in your head. Couldn't you?
1. 59 days in 2009
2. 58 days in 2022
3. 57 days in 2011
4. 41 days in 2013
5. 40 days and counting in 2023 as of August 5th
6. 36 days in 2020
6. 36 days in 1998
8. 33 days in 1948
Not my could
NASA could
Last edited by GAustex; 08-05-2023 at 07:53 PM.
So what impacts did the 2008 and 2015 eruptions have on average high temperatures that BB provided? I do not see a correlation with higher temperatures so are you saying we should not see high temperatures in 2023?1. 59 days in 2009
2. 58 days in 2022
3. 57 days in 2011
4. 41 days in 2013
5. 39 days and counting in 2023 as of August 4th
6. 36 days in 2020
6. 36 days in 1998
8. 33 days in 1948
So I know volcanos can affect weather but am not some expert
Note the articles have stated that ash volcanos tend to drop temps but water vapor volcanos rose temps. Tonga was a water vapor eruption this increased temps. Kracatowa dropped temps and I think that big one in the Phillipenes did also.
My very quick Google says 2008 eruptions had little effect on global weather patterns
I could not find any reference to 2015 eruptions affecting weather admittedly after a quick search.
There though are plenty of current articles about the Tonga eruption and how it will (COULD) cause hotter weather.
I am saying the last two years have been absurdly hot summers (in Texas) and could be part of a general warming trend AND the dog pile of the Tonga eruption. This has been inferred by smarter folks that me ALL over the interweb.
I am not going to say it’s not getting hotter
It is
I am not convinced it’s CO2 driven. But maybe it is.
Many experts contend so and many don’t. I believe politics and influence are drivers of both views.
I recall in the late 70s everyone was claiming a pending ice age.
I am pretty sure our beloved Mother Earth has had periods of cold and hot that were do ented and clearly observed AND older events inferred from cores and tree rings for instance.
So weather has been hot periods and cold periods and have been caused by any number of events (even asteroids I suppose). I think the solar output is the main culprit and we know this also varies somewhat cyclically. I have noted that some experts think we are in a period of high solar intensity.
To my knowledge sea levels have not increased from recent historic levels (see the Plymouth Rock).
What I do not believe is that we should self immolate by (amongst other things) cutting out fertilizers, stealing away my gas stove and water heater and banning gas motors. Taxing and limiting personal freedoms disgusts me. Also forcing carbon credits which is just a con game. We are doing this or contemplating these actions.
Also when we have not seriously cut back on private aircraft and Taylor Switft’s 60 semi truck caravan for her roadshows. Rules for thee and not for me.
Especially when Chyna and others are not even trying.
I cannot believe how ape crazy we are going-like domestically by not encouraging oil exploration and refinement which really is economic engine that I think helps overall.
But that CO2. …
Flame away
"Carbon dioxide in the atmosphere warms the planet, causing climate change. Human activities have raised the atmosphere’s carbon dioxide content by 50% in less than 200 years."
https://climate.nasa.gov/vital-signs/carbon-dioxide/
From wiki:
Between 1901 and 2018, the average global sea level rose by 15–25 cm (6–10 in), or an average of 1–2 mm per year. This rate accelerated to 4.62 mm/yr for the decade 2013–2022.
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