Comments by "Helmuth Schultes" (@helmuthschultes9243) on "American Reacts to Why Australia's Suburbs Are so HOT.." video.

  1. Sorry I may get a bit longer... The points about road, concrete house build, trees etc is all very true and vslid. No issues taken on thst. One critical heat component not mentioned is the predominant use of air-conditioner. Especially in the newer suburbs. In the past airconditioning was not hardly used in private homes, though increasingly in commercial buildings but now few houses are not fitted with airconditioning when built. Yes many old properties are even getting retro fitted but often with smaller units for specific parts of the house rather than entire house as is new build normal. Anyway the issue is that in cooling the inside it spills heat to outdoors, not just the energy of temperature difference but all those kilowatts electrical power consumed mostly becomes heat as little motion (kinetic) energy is imparted. Plus all the other increased electrical heat created in modern living. Then the heat losses of all the traffic internal combustion vehicle engine deliver under 30% of fuel energy as movement, rest becomes heat from coolant exhaust, oil and transmission, even motion energy becomes heat with air drag and at breaking to stop the vehicle. Even electric vehicles issue the energy as heat on stopping and air drag as well as some heat on charging, though some may recover fractional energy with regeneration at some heat losses in that. All this massive heat loss of ever heavier vehicle traffic, cars, trucks, buses, trains, planes, appliances and airconditioners all adds to local environmental heat buildup raising temperature above what sun alone would provide. At least solar panel help as they supply energy for appliances and airconditioning from sun input not energy stored in fossil fuels, A REAL MAJOR HELP to keeping temperature rises minimised. Further most houses get hotter inside, they do not have external shutters on windows, rather have curtains inside that block sun heat, dissipating solar heat inside, or if no curtains the furniture and carpets absorb the sun heat streaming in and creating heat. So adding to hot interior and higher airconditioning energy demands. If in hot summer external shutters were closed in peak day time, a lot of sun heat is avoided in the house keeping it cooler, and lowering airconditioner loads. My own house has no aircondioner but does have exterior roller shutters closed on hot days. And for most summer the interior stays cool enough to live with only fan air flow used. Opening shutters overnight , and letting night air flow through the house keeps comfort at limits for many days of exceptionally hot days. Yes hot nights staying above 35°C are very uncomfortable, but a fan running makes life ok at very low environmental and power impact. The lack of trees is a very severe problem. Anyone can experience the difference on hot days going to local forests or even local parks with trees, rather than the typical built up and shopping areas. Very much lowered temperatures in forest. My house has several trees reaching above roof height and adds to better conditions, as well real grass and garden space with plants help. The grass and nature strip trees of our streets also help. Sadly most roofs are darker colours, from Reds, Greens to Black/Grey, rather than light pastels to White. Anyone using the light finish actually gets ostracised by neibours for abnormal appearance not matching the norm. We tried a pale green years ago not liked by many feeling it did not meet community standards. All the above are very common issues, yet as pointed out the less affluent have little green cover, while the affluent, old suburbs have lots of green space, trees along roads, larger yards with trees grass and plants. Like many Australian cities the near coastal ocean places are remaining most comfortable, all new developments are pushing further inland so are significantly warmer. Many new developments are on old farmland, replacing what trees and greenery was there with nothing but roads, concrete and houses covering most land area, making all much hotter. Now in certainty at least in Australia, but probably elsewhere likewise, the worst hot conditions at all major cities is when hot air blows from inland to the coastal areas. The inland towns may regularly have higher temperatures irrespective of wind direction, with temperature in the 40°C and up while the big coastal cities have lower temperatures, even below 30°C in the same period. Yet Melbourne, Adelaide get the hottest conditions for northerly winds from inland, while Sydney, Brisbane for westerly winds, Perth for easterly to north-easterly. Melbourne normally only has over 35°C for generally northerly winds, with north-westerly to even some north-easterly included. Over 40°C only for strong northlerly winds. One aspect to the claimed climate change temperature rise, and I do not deny climate change occurs just how much is human caused, is that much of the data is including historical temperature (weather) measuring location data, that is now very city heat Island condition affected and even rural locals that in the past were forested country now open farm fields with at most a few scattered trees or tree rows along roads or fence lines. Yes there are added SOME oceanic temperatures from satellite readings. But how many points at ocean compared to number of land based points make up the stated 1.5°C rise over pre 1900 averages. If same locations on land are applied there would be no surprise that just urban heat and deforestation alone could given even a higher result if not for inclusion of above ocean locations that clearly from experience of ocean breeze is cooler than land. None of thatvaverage rise is definitely dependant on actusl climate change. Not that change is unexpected as climate has been changing for thousands of years since last ice age, and we ideally are reaching end stage of last post ice age heating up. If final stages, possibly it may be faster as last surface ice is reducing to minimal. Note also that a brief cooler period of 1970s there were actually preductions that a new ice age was possibly coming, but soon the same claims converted to warming by the same persons predicting an ice age, when that cool period ended. The fact is since 1600s to mid 1700s there was an exceptional cold period that was then restored to warmer, rising faster than present into the conditions of 1800 to 1900. In Australia there was a 1930s hot period over many years that was hotter and drier than present and an exceptional lower period in 1970s as noted above. I felt the 1960s had longer warmer summers than present. Going to beach swimming most nights from November to March. Not now! Climate is changing but the true cause is not entirely settled, especially with faked J curve, and dubious modelling using software written on many assumptions to show the expectations of the authors, and clear shown not tracking with real observation data, so showing to give false indications. CO2 increase so far is actually leading to significant plant and food crop growth increases. Much greening of the world has been tracked over past decades as CO2 rises fractionally, let's face it we have 0.04%, while past world CO2 has existed to percent levels as most life evolved, and into near full percent levels for most of past millions of years of major life on land. All life including land and water based was created at very much higher CO2 levels never any run away greenhouse conditions burning up everything.
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