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Jakarta Is Sinking So Fast, It Could End Up Underwater

nytimes.com

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Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#81
post #32

Earlier quoted context omitted.

Sea levels are projected to rise from 0.6 to 6 meters this century. [1] So while urban sinking is a much bigger immediate threat, climate change will pose a significant problem in the near future, and—crucially—will affect every coastal city in the world , not just Jakarta. [1]: https://sealevel.nasa.gov/understanding-sea-level/projection...

> Sea levels are projected to rise from 0.6 to 6 meters this century. I think you mixed up the units, the article says > 0.2 meters to 2.0 meters (0.66 to 6.6 feet)

Yes, thank you! I did mix up the units, and I can no longer edit my original comment :\

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#82

Earlier quoted context omitted.

Do the simple calculations yourself and see what they need to explain.

These simple calculations and the data needed for them would be a great thing for you to provide to support your claims.

I have provided this information in detail in the past and those who have challenged me to do so haven't even bothered to check it or respond. The information is freely available in all sort of resources. The bits you need are the surface area of the earth and the surface area of the oceans, the volume of land based ice required to melt to fill the appropriate surface area to whatever level you require (in my case 1 metre), the amount of energy required to do the phase change of 1 kg of solid H2O to liquid H2O (which is approx equivalent raising 1 Kg of liquid H2O from 0 degrees Celsius to 84-85 degrees Celsius) and viola you have your results. This give an approximation to the energy required and even if you were 20% out in any of your figures, the amount is of such a magnitude that those errors are fundamentally insignificant for the planetary effects that such an amount of energy would do.

That amount of energy on the lower bounds would have caused all life to become extinct before we would see the oceans rise by any significant amount.

Many years ago, I gave these calculations to a senior climate scientist and he noted at the time that the results were interesting and he would get back to me after he had analysed those figures. That was what 15 or more years ago and I have never heard anything back since those discussions.

I have provided such figures in detail to various climate scientists asking for their analysis and basically no response. Not even to the extent of saying that the calculations were flawed.

So when ever any fool climate scientist or their supporters promulgate any scenario that says we should expect any significant ocean level rises inside of 100 years (significant being anything above 0.5 metre - especially those who promulgate 1 to 10 metres) due to human activity then the onus is on them to demonstrate where the energy processes are occurring. They have not done so to date and based on their dogma, I suspect that they cannot.

The problem with all of this politically correct dogma is that they (the climate scientists en bulk) are not doing any science.

I have said it in the past - there are no stupid questions. It seems to be today that funding is the driver to follow the crowd and to not do actual science.

We need to know what is happening in our climate. This is irrespective of any ideological standpoint you may hold. If you challenge the anthropogenic climate change (ACC) dogma then you are anathema. Even if you believe in climate change, if you do not follow the party line then you are an infidel that needs to be destroyed. Jihad not only occurs in extreme Islam but is alive and well in Climate Science as well.

This whole matter is simple enough for a fifth grader to solve, let alone an adult who should be able to do this in 20 minutes (including looking up the information).

Scepticism has its place and we need a few more sceptics when it comes to the lack of rigour that is being used by those who promulgate such scenarios. If you want to follow a fool where he leads without at least a cursory look at the base of what they are saying then you are free to do so. When someone says that you need to look at what they are saying, you don't need to listen, you can just follow blindly.

end rant.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#83

Earlier quoted context omitted.

Do the simple calculations yourself and see what they need to explain.

These simple calculations and the data needed for them would be a great thing for you to provide to support your claims.

To make things real simple for those who can't use a search engine, try the following

earth surface area: 510072000 sq km

ocean surface area: 361132000 sq km

latent heat of melting (ice to water): 334 kJ/kg

From these you can calculate the amount (volume) of land based ice required for whatever ocean level rise you need and the amount of energy required to melt said ice.

Note that since only a portion of energy will enter ice, the total energy that would be needed to get the required energy transfer in the ice would be approximately 20 times required energy. This is based on studies done that indicate that it is about 5% of energy absorbed by the planetary system that transfers into the ice portion of the planet.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#84

Earlier quoted context omitted.

Do the simple calculations yourself and see what they need to explain.

It seems like you made a big mistake when you did the simple calculations yourself, so we'd like to see YOUR work. Because if you actually did the simple calculations correctly, and if you actually did get the results you claim, then you should be to quite happy show your work to us. Or did the dog eat your homework? Are you suddenly so indignant about being asked for proof because you're just blustering, and demandi…

See the starting point below. It will take you five minutes to do the calculations. Then you make up your mind if "politically correct" is an appropriate label.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#85

Earlier quoted context omitted.

These simple calculations and the data needed for them would be a great thing for you to provide to support your claims.

To make things real simple for those who can't use a search engine, try the following earth surface area: 510072000 sq km ocean surface area: 361132000 sq km latent heat of melting (ice to water): 334 kJ/kg From these you can calculate the amount (volume) of land based ice required for whatever ocean level rise you need and the amount of energy required to melt said ice. Note that since only a portion of energy will…

Pray tell me: where in your calculations are you calculating the one variable that matters the most: "Mean Sea Level".

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#86

Earlier quoted context omitted.

These simple calculations and the data needed for them would be a great thing for you to provide to support your claims.

To make things real simple for those who can't use a search engine, try the following earth surface area: 510072000 sq km ocean surface area: 361132000 sq km latent heat of melting (ice to water): 334 kJ/kg From these you can calculate the amount (volume) of land based ice required for whatever ocean level rise you need and the amount of energy required to melt said ice. Note that since only a portion of energy will…

Shripadk, mean sea level is actually irrelevant as far as these calculation are concerned. Really irrelevant. The climate scientists throw around their 1 to 10 metre or more scenarios and so all we need concern ourselves with is the gross minimum volume of ice required to melt.

Since the planet is an oblate sphere with a non-uniform land distribution and we have a large moon orbiting the planet, any prediction of what we would expect to see as an ocean level rise will depend critically on where on the planet you are stationed as well as the effects of tides.

In addition, any rises of the magnitudes predicted will require more ice to be melted not less as there will be inundation effects that will, in effect, increase the amount of surface area attributed to the oceans.

Hence, all calculations are a minimum not a maximum. If you want to seriously model tidal and inundation effects, then the amount of energy will greater and hence more unexplained by these very climate scientists.

If they cannot give an explanation of the energy requirements for a minimum then they will most certainly be unable to explain for any situation requiring tidal and inundation effects to be accounted for.

So mean ocean level is irrelevant.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#87

So the city is sinking many inches, even feet per year(due to excessive ground water withdrawals). With all the problems the city has, how does climate change(an average sea level rise of a few millimeters per year) even wind up on the reporters radar? I'm no denier, but it aggravates me when someone tries to force a connection to global warming/climate change.

What connection? To me the reporter stated the sinking was not due to climate change the ground is sinking faster than the sea levels are rising - it's not due to climate change. But the rising sea level is obviously occuring at the same time as the sinking ground which makes the sitution worse. >In fact, Jakarta is sinking faster than any other big city on the planet, faster, even, than climate change is causing the…

The tagline for the article:

> "...And it has to deal with mounting threats from climate change."

Paragraphs 4,5,6:

One local climate researcher, Irvan Pulungan, an adviser to the city’s governor, fears that temperatures may rise several degrees Fahrenheit, and the sea level as much as three feet in the region, over the coming century.

That, alone, spells potential disaster for this teeming metropolis.

But global warming turned out not to be the only culprit behind the historic floods that overran Rasdiono’s bodega and much of the rest of Jakarta in 2007. The problem, it turned out, was that the city itself is sinking.

A fear of a 3ft rise over 100 years, and global warming, is related to Jakarta's current problems in the manner that a scent candle burning in your house is "not the only culprit" in the worlds CO2 problems.

If you feel like its worth mentioning household candles are a problem, when having serious discussions on the causes of global warming/climate change, then I guess the reporter's inclusion of it makes sense.

edit: still wish HN had a preview button.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#88
post #76

So the city is sinking many inches, even feet per year(due to excessive ground water withdrawals). With all the problems the city has, how does climate change(an average sea level rise of a few millimeters per year) even wind up on the reporters radar? I'm no denier, but it aggravates me when someone tries to force a connection to global warming/climate change.

There is a connection. Global warming is part of the reason. Obviously in the beginning the largest initial problems are going to be for cities that have other reasons for sinking in addition to global warming. But global warming is part of the reason and will apply to every single city that is on the ocean coast. Say for example there is a terrible disease outbreak in your community. The first people that die will p…

Yep. And scent candles are causing global warming, thus must be discussed in any article about global warming.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#89

Earlier quoted context omitted.

These simple calculations and the data needed for them would be a great thing for you to provide to support your claims.

To make things real simple for those who can't use a search engine, try the following earth surface area: 510072000 sq km ocean surface area: 361132000 sq km latent heat of melting (ice to water): 334 kJ/kg From these you can calculate the amount (volume) of land based ice required for whatever ocean level rise you need and the amount of energy required to melt said ice. Note that since only a portion of energy will…

Surface area? Don't you need volume to compute the thermal expansion of the ocean? And you also need the volume of land ice to compute how much might melt... if you want to convince people, you need to do more than just provide four statistics and walk away, you need to show how you use those to compute the level of expansion. Which you haven't done, and I'm 99% sure you can't with just those four numbers.

Re: Jakarta Is Sinking So Fast, It Could End Up Underwater

#90
"Nobody here believes in the greater good" - this, and an apparent basic lack of education.

Remember that time in western history that we learned of the benefits of washing hands for disease control? I have witnessed people in Jakarta regularly urinating into little drainage ditches just a few meters away from people who were washing their dishes. You could assume they do this because there are not better places to wash dishes (but if you've ever camped you know you can "clean" all the surface with dirt/sand and then use a small amount of less contaminated water to finish the job). You wouldn't assume the guy peeing had no other options, as there are plenty of corners of garages and sheds available. So that's one big problem.

From my admittedly limited experiences in Indonesia, I would characterize the people as positive, reasonably industrious, and friendly. When managed and directed, they can build massive structures. Jakarta has so many high rise buildings you would be shocked. But the parts that are not managed are kind of left unfinished or are poorly finished. Fittings in buildings are irregular or worse, and spaces just a hand's reach beyond one's property boundary are left full of trash or even excrement as if it didn't exist. This I cannot understand. Perhaps it's something to do with a lack of pride (which can be a positive attribute when compared to societies too full of pride, but which can also be detrimental at this low extreme).

Some other fascinating examples of strange (and collectively detrimental) behaviors... there was a stretch of major freeway that had a minimum occupancy requirement during rush hours. As I understood, you were not allowed to drive on that stretch at that time with just a single occupant. And during those times, there were (presumably poorer) people who would stand dangerously close to traffic, casually waiting for someone to stop and pick them up. They would be driven to the other end of the zone, paid a small tip, and then deposited back onto the road. Then they would somehow cross the road and ride back the other direction. Some women would do this with their small children in tow. This suggests the level of poverty and (potentially) the lack of opportunity for some people, but it also demonstrates how plans designed to improve situations can be hijacked for individual gain. And traffic was so horrendous that you really can't blame the city for trying that occupancy approach.

I was at a talk given by an engineer who was doing volunteer work to help communities be aware of floods as they were developing. It was fascinating - basically analyzing Twitter activity to determine very localized details of flooding. But during his time there, he observed layers of flood walls built that should have prevented many floods. He also observed that along these stone walls, locals had cut openings through them to facilitate easy foot passage. In case it's not clear from my description, they had cut openings in flood walls so it would be easier for them to walk. Predictably, during flash floods, the water would be a meter higher on one side and just POURING through the man-made openings here and there. Eventually it would equalize, leaving the entire area flooded. boggle

Finally, driving in the higher end shopping areas, it was not too uncommon to see $140,000 Mercedes AMG G wagons and the occasional Rolls Royce driving around. My driver explained that some of these people were government employees, and that it was well-known that government employees would receive extra payments and lavish gifts for providing beneficial opportunities to wealthy individuals or businesses. Fortunately that sort of thing doesn't happen in our developed countries.

There is no clean end to this wall of text.

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