Climate and Nature

New Global Warming study warns: desert in Southern Spain in the future

Desert landscape
Comments (1)
  1. Rick Kooi says:

    “The amount of warming caused by the
    anthropogenic increase in atmospheric CO2
    may be one of the most misunderstood subjects in climate science.

    “Many people think the anthropogenic warming can’t be quantified,
    many others think it must be an insignificant amount.
    “However, climate scientists have indeed quantified
    the anthropogenic contribution to global warming
    using empirical observations and fundamental physical equations.”

    “Climate Myth…Increasing CO2 has little to no effect

    “While major green house gas H2O substantially warms the Earth,
    minor green house gases such as CO2 have little effect.
    The 6-fold increase in hydrocarbon use since 1940
    has had no noticeable effect on atmospheric temperature … ”
    (Environmental Effects of Increased Atmospheric Carbon Dioxide)

    “Humans have increased the amount of carbon dioxide (CO2)
    in the atmosphere by about 40% + over the past 150 years.

    “Figure 1: Carbon dioxide concentrations in the atmosphere
    over both the last 1000 years and the preceding 400,000 years
    as measured in ice cores….NOTE THE HUGE INCREASE.

    “As a greenhouse gas, this increase in atmospheric CO2
    increases the amount of downward longwave (IR) radiation from the atmosphere,
    including towards the Earth’s surface.

    “Surface measurements of downward long wave radiation,
    The increase in atmospheric CO2 & other greenhouse gases
    has increased the amount of infrared radiation absorbed
    & re-emitted by these molecules in the atmosphere.

    “The Earth receives energy from the Sun in the form of visible light and
    ultraviolet radiation, which is then re-radiated away from the surface
    as thermal radiation in infrared wavelengths.

    “Some of this thermal radiation is then absorbed by greenhouse gases
    in the atmosphere and re-emitted in all directions,
    some back downwards, increasing the amount of energy
    bombarding the Earth’s surface.
    .
    This increase in downward infrared radiation
    has been observed through spectroscopy,
    which measures changes in the electromagnetic spectrum.

    “Figure 2:
    Spectrum of the greenhouse radiation measured at the surface.
    Greenhouse effect from water vapor is filtered out,
    showing the contributions of other greenhouse gases (Evans 2006).

    “Satellite measurements of outgoing longwave radiation

    “The increased greenhouse effect is also confirmed
    by NASA’s IRIS satellite and
    the Japanese Space Agency’s IMG satellite observing
    less longwave leaving the Earth’s atmosphere.

    “Figure
    3: Change in spectrum from 1970 to 1996 due to trace gases.
    ‘Brightness temperature’ indicates equivalent blackbody temperature
    (Harries 2001).

    “The increased energy reaching the Earth’s surface from the
    increased greenhouse effect causes it to warm.

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