The locations of weather stations, changes in instruments, the siting of weather stations in warmer urban areas, changes in land cover and other issues have all been cited as issues
affecting the temperature trends often used to show that our planet is in fact warming.
Since Arctic ice is disappearing faster than expected, how does that appear
affect the temperature trend?
How did the re?location
affect the temperature trend?
An interesting question relates to the potency of the PDO in
affecting temperature trends.
The trends in these properties over time will
affect the temperature trends.
I don't see how TOBS change should
affect temperature trend within in each block of data either side of the change point.
This study demonstrates conclusively that this issue
affects temperature trend and that NOAA's methods are not correcting for this problem, resulting in an inflated temperature trend,» said lead author Anthony Watts, who blogs at Watts Up With That?
Not exact matches
Thus, although poor station quality might
affect absolute
temperature, it does not appear to
affect trends, and for global warming estimates, the
trend is what is important
Vineyards planted at higher altitudes or near the ocean — such as those in Oregon and Washington and in Argentina's Mendoza Province — will be less
affected by rising
temperatures and may continue to benefit from the warming
trend.
And the
trend held regardless of the
temperature in the anemones» tide pool homes, a variable that can
affect behavior.
Does
temperature trend affect economic activity?
Thus, provided one accepts the relationship between ghg and
temperature, it would be fine to assume that
temperature trends are
affected by economic activity.
And climate - related
temperature rise has already
affected crop yields in many regions of the world, a
trend that is projected to continue.
«There is a strong upward
trend in 3 - day maximum
temperatures over the area
affected by this heat wave,» said Geert Jan van Oldenborgh, a climate scientist at KNMI.
Changes in the frequency and magnitude of climate extremes, of both moisture and
temperature, are
affected by climate
trends as well as changing variability.
A new study from The Auk: Ornithological Advances uses European House Sparrows, which have spread into a variety of climates in Australia and New Zealand since their introduction in the mid-19th century, to show that this
trend in birds might actually be due to the effects of high
temperatures during development — raising new alarms about how populations might be
affected by global warming.
The adjustments are unlikely to significantly
affect estimates of century - long
trends in global - mean
temperatures, as the data before, 1940 and after the mid-1960s are not expected to require further corrections for changes from uninsulated bucket to engine room intake measurements.
Benestad, R.E., Are
temperature trends affected by economic activity?
[Response: You're missing the point, which is that the UHI is accepted, of course, but the point at issue is whether it
affects temperature *
trends *, which a constant bias doesn't.
Pielke apparently did not understand why the
temperatures before 1910 hardly
affect this conclusion (in fact increasing the probability from 78 % to 80 %), and that the linear
trend from 1880 or 1910 is not a useful predictor for this probability of breaking a record.
The melting ice caps follow a
trend of continually rising
temperatures across the globe, and the Northern hemisphere has been particularly
affected.
Now a modelling study by researchers at the Scripps Institution of Oceanography in La Jolla, California, indicates that a decadal La Niña - like cooling
trend affecting as little as 8 % of Earth's surface can explain the slower rise in global
temperatures.
If a substantial fraction of all the weather stations from around the world have been
affected by urbanization bias, then this could have introduced an artificial warming
trend into the «global
temperature trend» estimates.
Could a belief in different hypotheses
affect how
temperature trends are homogenized?
In a nutshell, we found that urbanization bias has seriously
affected the various global
temperature trend estimates.
As a result, the estimated global
temperature trends are seriously
affected by this bias.
Basically, a 1980s shift in radiosonde equipment caused 1980s radiosonde tropospheric
temperatures to be artificially high,
affecting radiosonde - based tropospheric
temperature trends [12].
But to cause this «top - down warming,» the warming
trends in the atmosphere would have to be more pronounced than surface warming
trends, because much of the energy from atmospheric warming is lost into space and does not
affect surface
temperatures.
As an example, using online monthly climate agency data I made this chart to help me understand how the long term
temperature trends are
affected by major volcanic eruptions and El Nino - La Nina events.
It seems reasonable that such a cycle would
affect the observed
trends over the 30 - year period of the satellite
temperature record.
But there's no word from this team on how dealing with pollution in developing countries might
affect regional
temperature trends to come.
It shouldn't be surprising that the UHI effect is not a big source of error in the
temperature trend, because a stable
temperature bias because of bad siting will not
affect the
trend.
What does the missing warming of areas not much
affected by ocean air
temperature trends indicate?
In this post we have looked at some of the reasons why the
temperature trend may be more robust with respect to factors
affecting the broader region in which stations are located than might seem the case.
But, unfortunately, most of these records were not meant for studying long term
temperature trends, and so they are often
affected by various non-climatic biases.
For this graph, both the
temperature and CO2 datapoints were set to zero; then the cumulative changes for both were plotted each month - does not
affect linear
trends when done this way.
Neither of these arguments address the issue of whether UHI is
affecting measured minimum
temperatures, but they may in fact be more important points to make about measured
trends in minimum
temperatures than the one Parker is trying to make.
If station data from low latitude stations are eliminated, how will that
affect the reported
temperature trends?
Solar activity certainly
affects surface
temperatures (as your link suggests), but it's obviously not caused the
trend in warming.
Changes in the frequency and magnitude of climate extremes, of both moisture and
temperature, are
affected by climate
trends as well as changing variability.
The paper found no
affect on average
temperature trends from differences in quality of station siting.
Climate variability driven by changes in the Pacific Ocean has
affected the surface
temperature trend.
Our Sean Sublette talked with Weather Underground on the Weather Channel about how a changing climate will
affect the future of baseball, from the seasonal
temperature trends to the health of players and fans.
... he also knows that urban heat island effects are corrected for in the surface records, and he also knows that this doesn't effect ocean
temperatures, and that the station dropping out doesn't
affect the
trends at all (you can do the same analysis with only stations that remained and it makes no difference).
The adjustments are unlikely to significantly
affect estimates of century - long
trends in global - mean
temperatures, [don't complain, the global warming was there before and after this round of adjustments] as the data before, 1940 and after the mid-1960s are not expected to require further corrections for changes from uninsulated bucket to engine room intake measurements [except by Karl (2015)-RSB-.
This effect will occur once and will not
affect the long term
temperature trend.
Long - term Cenozoic
temperature trends, the warming up to about 50 Myr before present (BP) and subsequent long - term cooling, are likely to be, at least in large part, a result of the changing natural source of atmospheric CO2, which is volcanic emissions that occur mainly at continental margins due to plate tectonics (popularly «continental drift»); tectonic activity also
affects the weathering sink for CO2 by exposing fresh rock.
This was a very important finding
affecting climate data continuity and the monitoring of local, regional and national
temperature trends.
Fyfe says that the advantage of this approach is that it takes account of events that
affect decadal
temperature trends.
... the following video clarifies how the interplay of natural and human factors have
affected the short - term
temperature trends, and demonstrates that underneath the short - term noise, the long - term human - caused global warming
trend remains as strong as ever.