Not exact matches
* However, the same panel then concluded that «the
warming trend in
global - mean surface temperature observations during the past 20 years is undoubtedly real and is substantially
greater than the
average rate of
warming during the twentieth century.
Warming as measured by increased global heat, (heat in greater than heat out) and warming measured as increased globally averaged temperatures are closely linked but are still different
Warming as measured by increased
global heat, (heat in
greater than heat out) and
warming measured as increased globally averaged temperatures are closely linked but are still different
warming measured as increased globally
averaged temperatures are closely linked but are still different things.
The conclusions of most recent studies are that the MWP was on
average cooler than today, but The
Great Global Warming Swindle, blogs and industry think tanks say otherwise, often based on graphs like this.
In contrast,
global warming warms nights faster (although the effect is slight) and winters faster than summer (which effect is not slight) so that modern US annually
averaged temperatures are
greater than those of the 1930s.
These facts were enough for an NAS panel, including Christy, to publish a report Reconciling Observations of
Global Temperature Change which concluded that «Despite differences in temperature data, strong evidence exists to show that the
warming of the Earth's surface is undoubtedly real, and surface temperatures in the past two decades have risen at a rate substantially
greater than
average for the past 100 years»
Warming at higher latitudes of the Northern hemisphere may be
greater than the
global average, as high as 4 to 7 °C between 2000 and 2100 (ACIA, 2004).
In the opinion of the panel, the
warming trend in
global - mean surface temperature observations during the past 20 years is undoubtedly real and is substantially
greater than the
average rate of
warming during the twentieth century.
Based on current knowledge, however, it appears that achieving a high probability of limiting
global average temperature rise to 2C will require that the increase in greenhouse - gas concentrations as well as all the other
warming and cooling influences on
global climate in the year 2100, as compared with 1750, should add up to a net
warming no
greater than what would be associated with a CO2 concentration of about 400 parts per million (ppm).
In fact, our research suggests that with 2 ℃ of
global warming, the future
average sea temperatures around the
Great Barrier Reef would be even hotter than the extremes observed around the time of the 2016 bleaching.
Simply stated, the differential impact from the gargantuan, modern CO2 emissions on
global 5 - year
average warming should be significantly
greater than pre-modern, natural
warming for 5 - year
averages.
22 Land areas are projected to
warm more than the oceans with the
greatest warming at high latitudes Annual mean temperature change, 2071 to 2100 relative to 1990:
Global Average in 2085 = 3.1 o C
In case you need reminding, these higher than normal ocean temperatures fit solidly into the broader
global trend towards
warmer temperatures — though regionally they are much
greater than the
global average (as the chart at top shows, with the red areas being up to 5 °C above normal).