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Posts posted by chubbs

  1. Good discussion about CC impacts on northeast snow above. Here is my two cents. A couple of general comments first: 1) As mentioned above you have to be careful evaluating  recent trends. Snowfall is highly variable year-to-year and decade-to-decade in the northeast. 2) Climate change is ongoing. If we want a centered 30-year average to get 2023 snowfall climatology we are going to have to wait till 2038. This is problematic because snowfall is becoming even more variable.

    Per 2018 paper linked below we shouldn't expect big climate impacts on northeast US storm tracks. In addition we aren't going to see significant negative climate impacts on big snowstorms, they may even become heavier; but, we will steadily lose lighter snow events as conditions that allow snow become more infrequent. In general this agrees with recent experience.


    Now for some data. Below are running 30-year average snow for I95 and a few inland sites. The chart is on a log scale so cities with heavier snow don't dominate and to highlight percentage changes. I would group the chart into two main baskets. There is a northern group with mixed trends, coastal generally doing better than inland in recent decades; and, there is a southern group that is in long-term decline. My interpretation is that the negative impact of loosing potential snow days overcomes other climate change impacts at the southern sites. If you are a snow lover, the data indicates that you don't want to get warmer than Richmond was 1960-1990. Unfortunately we will get to test this theory at additional sites this decade. We'll see if it holds up.




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  2. 6 hours ago, csnavywx said:

    Sep. already stacking some nuclear daily prints on moyhu. Prob going to end up above Aug at this point. Still 5 or 6 months of prints until ENSO peak.

    Yes, CFS anomalies holding near high for year past 5 days. Only brief periods in Feb 2016 and feb 2020 were higher than 2023 spikes. Late winter is typically when the highest anomalies occur. The late winter spikes this year are going to come off a much higher base.


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  3. 15 hours ago, bdgwx said:

    And here is the evolution of my predictions for the annual mean GISTEMP value as posted in this thread.

    06/08: 1.05 ± 0.09

    06/16: 1.06 ± 0.08

    07/13: 1.062 ± 0.07

    07/19: 1.060 ± 0.07

    08/14: 1.075 ± 0.06 

    08/25: 1.083 ± 0.05 

    09/05: 1.099 ± 0.05 

    The steadily increasing trend in your model indicates you may be right about the current model forecast underestimating the mean. Not surprising that the model has erred low. We've never had a year separate from the others in summer like this one, so hard to forecast this year from past behavior. If the current separation vs existing records holds through the rest of the year, then your model will be low. We'll see.



  4. 1 hour ago, bdgwx said:

    The 3-digit file says 2016/02 is 0.705 which rounds up to 0.71, but that has updated yet so may be it now rounds down to 0.70 C.

    Anyway, yeah, my model says the ENSO contribution is 0.14 * ONI lagged 4 months. 2016/02 had a contribution of 0.14 * 2.4 = 0.34 C while 2023/08 only had a contribution of 0.14 * 0.2 = 0.03 C. I think it is a good bet that the previous record will be broken even with a less intense El Nino.

    Another way of looking at it. 2015 is the enso analog to this year but 2015 had somewhat higher oni. UAH averaged 0.14 in 2015. This year is averaging 0.31, but should end up near or above the 0.39 record; which mplies strong warming over the past 8 years.

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  5. 33 minutes ago, bdgwx said:

    UAH TLT came in at +0.69 C. It is the warmest August in their dataset by a long shot.


    UAH needs to average 0.55 for the rest of the year to break 2016's record. Doable considering higher values in the past 2 months, and the strengthening nino. Would expect uah to peak early in 2024.  UAH temperatures are recovering to record levels much faster after the 2016 compared to the 1998 nino peak. Either warming is accelerating or UAH has changed or both.

  6. 7 hours ago, Typhoon Tip said:

    "Pyrocene"?    what -

    is that a sub-classification for 'The Anthropocene' that's recently been codified by the general consortium?  ...

    Not that it needs elaboration ...but the idea of the Anthropocene is that we the people, of the united state of humanity's innovation having outpaced the checks and balances of the back ground various planetary systems, have breached the point where fucking up said planet, in order to form a more perfect world for ourselves, is officially substantial. And hence forth, we are now proven enough in doing so that we're actually definable as geologically significant force - thus, and epoch known as the Anthropocene.  Nice loaded run-on sentence -

    It just seems logical that trying to define Fire ... Flood, heat and even cold craziness, when these systemic symptoms are really indirectly if not directly causally related to the former, is just reductive and inflammatory (pun intended for purposes of annoying  haha).

    But he may have been tongue-in-cheek anyway.  LOL   Yeah, kidding aside, ...I don't think it takes much of an idiot (really) to see that we are getting these conflagration explosions like never before. The old mantra/assumption that bad land management is contributory...? doesn't work.  How was midriff Canadian continental space a product of poor land management?

    And ...doing so on every continent at the same time.   I gotta say, maybe Maui was just bad timing... but a firestorm on an island is something pretty significantly chilling (sorry) when its surrounded by thousands of miles of water.  If we can do it in that geologic setting... we can do it over continental expanses. 

    One aspect I have not seen researched/printed ...is any publication that discusses the carbon footprint of the global surge of fires and the C02 exhaust - the integrated. 

    See, not that you or anyone else reading this asked... but, this is part of the "uncertainty curve" of the Climate Change "feed-back" loop.  The CC models that attempt(ed) to project the future world given various degrees of temperature increase, are (sure) vastly more sophisticated compared to those 1990s versions, but ... I don't think any of them are that discrete.  Like did they predict fire storms, per se?  Certainly not when and extent. Did they predict Methane Hydrate release/explosive out-gassing from ancient permafrost thawing?  Did they subsequently release enough green-house gas emissions from these ( as well as the CO2 from all the square-mouthed enraged climate deniers) to the bake? 

    I'm asking here - not declaring.  But it seems intuitive that there are unknown feed-backs that have been/are taking place; they can cause this thing to be accelerated. And, we all know that observations of, therein, as well as the attribution sciences tending more and more to confirm, all point to an acceleration display.


    Dr. Otto usually chooses her words carefully. Googled  "Pyrocene"  - the term was coined by  fire expert Steven Pyne in 2015. Below is a link to his website which has info on his publications.



    Below is a good blog article on Canadian fires and climate change.



    Finally believe that the CO2 emissions from forest fires are included in carbon cycle models but don't know the details. Would guess that uncertainty in future wildfire CO2 and CH4 emissions is large.


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  7. July SST 2023 minus 2022, this year's increase in global SST is mainly due to enso.   Note that warming is particularly strong in the 1,2 region and extensive in the eastern Pacific over a broad latitude range from Chile to Mexico, particularly in the S Hemi. The tropical and subtropical  E Pac has a large positive feedback to ocean warming due to reduced cloud cover and stability (see slide posted above). Timing of the SST rise this year also argues for enso being the heavy hitter in warming SST, that and the large forcing imbalance which built up under the long period of nina conditions.



  8. 1 hour ago, GaWx said:

    Thanks. In Swain's article, he says:

    "climate change–which is likely increasing the duration and severity of droughts on the lee sides of the islands and the intensity of wet-dry cycling of precipitation (which favors extra vegetation growth, and then rapid drying of that extra growth during high risk periods)."

    Then you restated Swain's idea of wetter wet seasons and drier dry seasons.


     But then I read this from your last link about expected changes on Hawaii, itself, due to CC written by Kevin Hamilton:

    "We found that in the wet windward areas of Hawaii, rainfall is projected to increase substantially. That includes increasingly frequent extreme downpours. On the other hand, rainfall is predicted to decrease substantially over much of the rain shadow regions."

     So, to recap, Swain is suggesting wetter wet seasons and drier dry seasons. But Hamilton is instead suggesting wetter windward areas and drier leeward areas.

     So, Swain implies CC causes Lahaina to have both wetter winters (causing increased vegetation) and drier summers (causing more fire danger due to more fuel available that dries out in summer).

     But Hamilton is implying CC causes both winter and summer to be drier at Lahaina. So, per Hamilton, there actually isn't the increased fuel at Lahaina due to wetter winters.

      So, Swain (wetter) and Hamilton (drier) are literally on opposite sides on how CC affects Lahaina winter rainfall.

     Any thoughts about this? Doesn't it concern you? Thanks.

    Yes, they do not appear to be consistent. I would go with the local expert Hamilton. Swain may be wrong or I could have misinterpreted what he means by wet-dry cycling. It could be that the rain shadow areas are getting less frequent rain but when it does rain the rain is heavier. Increased precipitation intensity even in areas that receive less rain is mentioned in the abstract of the first reference I provided.

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  9. 2 hours ago, GaWx said:

    What do you mean by "wet/dry season cycling" and how does that relate to increased CO2? Thank you in advance.

    I borrowed the term from Swain. Believe it merely refers to the  cycling between wet and dry seasons. Per link below, climate change intensifies the water cycle.  Wet seasons can become wetter and dry seasons dryer.


    Here's an article by a local meteorologist on climate change impacts on Hawaii's precipitation


  10. 5 hours ago, TheClimateChanger said:

    What is incredible to me is just 12 years ago, even hardcore believers in climate change couldn’t fathom the possibility of 3C of warming by 2060. Now, here we are in 2023, and already exceeding 1.5C of warming. Scientists are saying we will likely breach 2C during the 2030s. It doesn’t seem so far fetched now, does it? And these new findings about the methane really supports my analogy of earth’s climate as a seesaw.

    I don't see evidence of any big temperature non-linearity. Temperatures are rising faster because man-made forcing has increased at a faster rate. The forcing increase is due to reduced sulfur emissions mainly while CO2 emissions remain elevated. There are also some natural effects that are lining up this decade for warming: the volcano, warming in E Pac,  and per chart below a solar cycle which is stronger than the last. If we get CO2 emissions under control the rate of temperature increase will drop. With fossil fuels losing competitive advantage, holding under 2C is feasible, but we need to make climate change a higher priority.


    • Like 1
  11. 10 hours ago, wxmx said:

    2023 vs 2015, 2023 is steadily pulling away. A couple of causes come to mind: 1) the earth's energy imbalance is roughly twice as large this year almost 2 W/m2 vs roughly 1 W/m2 in 2015, 2) 2023 started from a nina state while 2015 was already a weak nino. The recent triple nina obscured much of the recent increase in forcing/energy imbalance.

    Screenshot 2023-08-14 at 06-09-01 Climate Reanalyzer.png

  12. On 8/11/2023 at 2:52 PM, GaWx said:

     Please elaborate on the connection of CC and the terrible Maui fires. I'm asking because I posted a detailed write-up about the causes in the relevant tropical thread (with NWS sources cited) and didn't realize CC was assumed to be a contributing factor:


    A paragraph from Dr. Daniel Swain's blog (at end after discussion of upcoming weather on W coast):

    As much as it might surprise some folks, the Hawaiian islands are no stranger to fire. Nearly all ignitions today are caused by human activities (though most are accidental). Wildfire risk is rising, especially on the dry sides of the islands (which, in some cases, receive an annual average precipitation similar to that of Los Angeles), due to a combination of unmanaged invasive grasses building up huge fuel loads on abandoned plantations and climate change–which is likely increasing the duration and severity of droughts on the lee sides of the islands and the intensity of wet-dry cycling of precipitation (which favors extra vegetation growth, and then rapid drying of that extra growth during high risk periods). Here, too, as in so many other places, subdivisions have been built and expanded that increasingly extend into high fire risk zones. In fact, in County of Maui planning documents, nearly all of Lahaina was characterized as being at high to extreme wildfire risk.


    One other thought: We often hear  "CO2 is plant food", i.e. increased CO2 increases plant growth when conditions allow. This would also increase fire risk in areas like Hawaii with wet/dry season cycling.

    • Like 1
  13. 4 hours ago, GaWx said:

     Please elaborate on the connection of CC and the terrible Maui fires. I'm asking because I posted a detailed write-up about the causes in the relevant tropical thread (with NWS sources cited) and didn't realize CC was assumed to be a contributing factor:




  14. The 12-month average energy imbalance is roughly twice as large now vs the last big nino in 2015. Not surprising that we are seeing a larger enso response this year. Per my post above the east-based pattern is also favorable for warming. Enso is by far the biggest change this year vs last. One way to think about it. The atmosphere wants to be warmer but the ocean is holding it back. If the ocean cooling relaxes, the atmosphere can warm quite a bit before loosing too much to space.


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