Global Warming is an observational fact. Here is the proof.
In this controversy, scientific evidence falls into two categories: direct measurements
(which began with the invention-distribution of inexpensive, yet
accurate, thermometers in the mid 1860s) and proxy
- Direct measurements require little interpretation provided
you understand a very small amount of science.
- Proxy measurements require quite a bit of interpretation (because
they cross many scientific disciplines -and- are spotty so do not
necessarily represent world wide events) and so should only be left to
the experts in the court of peer reviewed science.
Proof 1 - Sea Level Rise
- Since the economies of many seafaring natation's was tied to an
ocean-based commerce, their respective navies began collecting oceanic
statistics which included the rise, fall and timing of tides. An unexpected
observation from "tide gauges" is that sea levels were (on average) always
rising over time.
- Western countries have been launching weather satellites with down
looking RADAR since the mid-1990s
- People who attended a calculus class would be familiar with the
phrases "rate of rise" (which is known as velocity) and "rate of rate of
rise" (which is known as acceleration). Since the rate of rise is
increasing, then it can be said that sea level increase is accelerating.
- Ignoring acceleration for a moment, let's assume the rate remains
steady at 3.3 mm per year. Simple math shows that the rise over the next 100
years will be 330 mm (33 cm or 13 inches) higher than now. But since the
sea-level rise is accelerating, the actual rise will be higher.
- Remember that sea level is measured verticaly. Since most shore lines and beaches
are angled like ramps, tide surges will do much more damage a lot
- The sea level observation alone usually induces rational skeptics to change their point of view into the direction of concern.
- Remember that water accounts for 71% of the Earth's surface.
This is proof that the current warming trend is global
- melting glaciers as well as melting polar ice are the
primary contributors to level
- since warmer water occupies a slightly larger volume then
warming also contributes to sea level rise (e.g. the rise
will continue after all the ice is melted)
- Earth is still coming out of the
ice-age that ended 11,700 years ago so some of this
warming/melting is natural. However, unlike the past half-dozen
ice-ages, this one happened during at the when the human
population exceeded 1 billion thus triggering a CO2
liberating industrial age. The current human population now
exceeds 7.75 billion
Proof 2: This interglacial is different
- Homo sapiens,
the current human form, did not exist a bit more than 200-300 thousand years
ago which means that no one was present to do direct measurements. This
means that indirect measurements are all we have available to us.
- What humanity knows about previous glacial periods (ice ages) comes from
ice cores extracted in
places like Antarctica and Greenland
- While there are no hard-and-fast rules about this stuff, ice ages happen
every 120 thousand years when CO2 levels fall below 230 ppm (the chart to
the right shows 7.5 such cycles.
- However, this chart as well as others has convinced scientists that the
normal variation swings, on average, between 180 ppm and 280 ppm.
- Notice that the current interglacial has CO2 numbers more than 100 ppm
above 280 ppm.
- The reason for this is that the current interglacial has enabled a human
population explosion which enabled an industrial revolution
Proof 3 : CO2 is rising while Oxygen is falling
- Average global temperatures have risen 1.05 C (1.9 F) degrees
since broad measurements began in 1880
Measurement: http://climate.nasa.gov and https://www.giss.nasa.gov/research/
- CO2 levels have risen 27% since annual
measurements began in 1958
(most recent CO2 data)
Computed Rate of Increase: ((412-315) / (2019-1958)) = (97 /
61) = 1.59 ppm per year
- Oxygen levels have fallen (695-103) = 592
per meg since annual measurements
began in 1990
sets are freely available for download )
O2 production by non-animal life is not able to compensate
for all the "unnatural" fossil fuel burning by humanity,
it appears that our biosphere is slowly dying.
- Most people forget that our machines (cars, trucks, boats, planes,
tanks, etc) also breathe in oxygen while exhaling carbon dioxide
Waterloo, Ontario, Canada.